Copper(I) halide hybrid materials offer a versatile platform for tunable photoluminescence, with potential applications in light-emitting devices and scintillators. However, clarifying how structural features influence t...Copper(I) halide hybrid materials offer a versatile platform for tunable photoluminescence, with potential applications in light-emitting devices and scintillators. However, clarifying how structural features influence their photophysical properties remains important for their further development. Herein, we report two novel Cu(I)-iodide "All-in-One" (AIO) hybrids synthesized from a phosphine-amine ligand that undergoes preferential -protonation, enabling simultaneous ionic and Cu-P coordination. Comprehensive structural, spectroscopic, and computational analyses suggest that the intermolecular hydrogen-bonding environment is associated with the relative contributions of intraligand charge-transfer (ILCT) and metal/halide-to-ligand charge-transfer ((M + X)LCT) excited states. Compound 2, which features weaker intermolecular interactions, shows a much weaker ILCT contribution together with highly efficient (M + X)LCT emission and a near-unity photoluminescence quantum yield of 98.5%. The compound further demonstrates efficient radioluminescence and robust stability, highlighting its potential as an X-ray scintillator. This work suggests that intermolecular interactions may play an important role in tuning excited-state dynamics in copper(I) halide hybrid materials.
Anthropogenic and industrial activities release toxic and non-biodegradable heavy metal ions (HMIs) into the environment, posing severe ecological risks even at trace concentrations and necessitating their critical detec...Anthropogenic and industrial activities release toxic and non-biodegradable heavy metal ions (HMIs) into the environment, posing severe ecological risks even at trace concentrations and necessitating their critical detection. Voltammetry has been widely adopted as a mainstream analytical technique for this purpose, driving the demand for low-cost electrode materials that offer high sensitivity, low detection limits, and excellent stability. Low-dimensional silicon carbide (SiC) materials hold great promise for electrochemical applications owing to their abundant active sites, large specific surface area, facile surface functionalization, and exceptional robustness in harsh environments including extreme temperatures, strong acids, and strong alkalis. Despite these advantages, studies on the application of low-dimensional SiC materials for HMI detection remain limited. In this work, we successfully synthesized modified SiC nanosheets and nanowires for the simultaneous electrochemical detection of Pb, Cd, Cu, and Hg. The as-prepared SiC-based electrodes exhibited lower detection limits and enhanced sensitivity compared to conventional electrodes. Moreover, they demonstrated excellent stability and reproducibility, underscoring their considerable potential for practical electrochemical sensing applications.
To develop energetic combustion catalysts for solid propellants, two novel energetic metal coordination compounds, Mn(AIM)(BF) (Mn-ABF) and Ni(AIM)(BF) (Ni-ABF), were successfully synthesized in this study. These compoun...To develop energetic combustion catalysts for solid propellants, two novel energetic metal coordination compounds, Mn(AIM)(BF) (Mn-ABF) and Ni(AIM)(BF) (Ni-ABF), were successfully synthesized in this study. These compounds were prepared by coordinating Mn and Ni ions with the ligand 1-allylimidazole (AIM) and the tetrafluoroborate anion. Physicochemical characterization revealed that both compounds exhibit excellent safety performance (IS > 40 J, FS > 360 N) along with favorable energetic properties. Specifically, Mn-ABF and Ni-ABF lowered the decomposition temperature of RDX by 3.7 °C and 9.8 °C, and reduced its apparent activation energy by 32.1 kJ mol and 50.4 kJ mol, respectively. For HMX, the decomposition temperatures were decreased by 3.8 °C and 18.3 °C, with corresponding reductions in apparent activation energy of 43.5 kJ mol and 137.7 kJ mol, respectively. Combustion experiments based on these findings demonstrated that both compounds significantly promote the combustion process in RDX/AP/Al and HMX/AP/Al composite systems. They reduced the burning times of both AP/RDX/Al (from 33 s to 16 s and 6 s) and AP/HMX/Al (from 31 s to 13 s and 10 s), while also increasing the flame area and intensity. Quantum chemical calculations were conducted to analyze the Hirshfeld surfaces, interatomic interactions, and molecular electrostatic potential of Mn-ABF and Ni-ABF. These analyses revealed the intrinsic reasons, at the electronic structure level, for the superior catalytic performance of Ni-ABF over Mn-ABF. The results indicate that the synthesized Mn-ABF and Ni-ABF possess promising application potential as highly efficient combustion catalysts for solid propellants.
Mixed-anion solids with reduced dimensionality and layered (2D) structures exhibit a range of advantages arising from their tunable bonding environments and structural flexibility. Studies involving cationic substitution...Mixed-anion solids with reduced dimensionality and layered (2D) structures exhibit a range of advantages arising from their tunable bonding environments and structural flexibility. Studies involving cationic substitution in the Sillen family of bismuth oxychloride-containing triple fluorite blocks, BiYOCl, to impart new functions are scarce and further investigations are required. In this study, we examined the optical and dielectric property changes in BiYOCl by introducing Cu and Cd at the Y site. Up to 20 mol% Y in BiYOCl could be substituted with Cu and Cd while retaining the layered tetragonal structure (S.G. 4/). The inclusion of these two divalent ions increased the unit cell volume. Doping with Cu and Cd ions produced nearly equivalent amounts of Bi ions, as confirmed by XPS analysis and iodometric redox titration. The EPR spectra of BiYCuOCl indicated a pseudo-octahedral environment around Cu. The absorption edge in the UV-visible spectra of the Cu and Cd doped BiYOCl samples was redshifted, leading to a reduction in the optical bandgap. For the Cu doped sample, the CIE 1976 * coordinate became more negative, indicated by the deepening of the green shade. The * value became positive with the addition of Cd, imparting a reddish tinge to the sample. Temperature-dependent dielectric measurements of Cu and Cd-doped samples in the frequency range of 1-10 Hz revealed Maxwell-Wagner-type polarization and pseudo-Debye-type behavior, respectively.
Though perovskites remain a vital component of the electronics industry and solar cell technology, the defects that occur in perovskite films due to uncontrollable crystallization and the fragility of ionic compounds rem...Though perovskites remain a vital component of the electronics industry and solar cell technology, the defects that occur in perovskite films due to uncontrollable crystallization and the fragility of ionic compounds remain serious limitations. The present study focused on synthesising a perovskite CsMAPbI active layer with tailored configurations using transition metal sulphides (both pure and V-doped WS and MoS) to enhance the device characteristics of perovskite solar cells (PSCs). By optimizing the organic-inorganic interface, the power conversion efficiency (PCE) of the optimised V-doped WS-based PSC increased by 48% to reach an impressive 15.62%, representing a significant improvement from pure CsMAPbI. This enhanced output originates from the high photon absorption capability of V-doped WS and the efficient low-dimensional charge transport pathways, which together effectively increase the generation, separation, and collection of charge while minimizing recombination losses. In long-term stability testing, the optimized device retained 80% and 76% of its PCE after 1000 h under continuous illumination and at 70 °C, respectively. The proposed V-doped MS- and WS-based design offers reliable interfacial energy alignment and enriched charge transport, while also exhibiting great promise for scalable processing, positioning it as a useful candidate for next-generation energy conversion technologies.
Zhang Z, Kano J, Morita S
… +2 more, Shimokawa H, Osada M
Dalton Trans
· 2026 Jun · PMID 42300858
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Hydrated layered oxides are widely encountered, yet the presence of disordered interlayer water often complicates crystal structure determination from laboratory X-ray diffraction. Here, we report the crystal structure o...Hydrated layered oxides are widely encountered, yet the presence of disordered interlayer water often complicates crystal structure determination from laboratory X-ray diffraction. Here, we report the crystal structure of the Dion-Jacobson-type layered perovskite-related material HCaNbO·1.5HO, solved from synchrotron X-ray diffraction data by combining direct methods in reciprocal space, Le Bail whole-pattern fitting, and Rietveld refinement. The hydrate crystallizes in a tetragonal structure with space group 422 ( = 7.7070(5) Å, = 32.4870(3) Å). Incorporation of partially occupied interlayer water-oxygen sites on the (110) plane at = 0 and 1/2 successfully reproduces the low-angle 00 reflections while preserving the CaNbO framework. The resulting crystallographic model explicitly resolves the arrangement of interlayer water molecules and provides a robust structural foundation for band-structure calculations as well as for the rational design of hydration-controlled intercalation, exfoliation, and composite materials based on layered perovskite-related materials.
Developing microwave-absorbing materials with wideband efficacy, low density, and minimal thickness remains a key challenge for electromagnetic interference shielding and stealth. This study unveils two ultralight aeroge...Developing microwave-absorbing materials with wideband efficacy, low density, and minimal thickness remains a key challenge for electromagnetic interference shielding and stealth. This study unveils two ultralight aerogels prepared in parallel: a ZnO/ZnFeO/FeO/RGO heterostructure and its MWCNT-reinforced counterpart (ZnO/ZnFeO/FeO/RGO/MWCNT), the latter incorporating both GO and MWCNT simultaneously during synthesis. The optimized composite demonstrates extraordinary bandwidth performance, achieving a reflection loss (RL) below -10 dB across an exceptionally broad frequency range of 5.4 to 18 GHz, effectively covering 12.6 GHz of the measurable spectrum with matching thicknesses of just 1.4 to 4.0 mm. The formation of a synergistic conductive network between RGO and MWCNTs facilitates superior charge transport and dielectric loss, which is instrumental in realizing this ultra-wideband absorption. The central finding of this work is that the material's architecture successfully fulfills the dual criteria of excellent impedance matching and a high attenuation coefficient. The presented aerogel, with its remarkable bandwidth, represents a highly promising candidate for next-generation electromagnetic wave absorption applications.
Langwald J, Burguera S, Frontera A
… +1 more, Wickleder MS
Dalton Trans
· 2026 Jun · PMID 42300815
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We report the preparation and characterization of [Se], [Te] and [Te] cations, stabilized as polysulfates, namely [Se][SO], [Se][HSO], [Se][HSO], [Te][HSO], [Te][HSO] and [Te][SO]. In the case of tellurium compounds, thi...We report the preparation and characterization of [Se], [Te] and [Te] cations, stabilized as polysulfates, namely [Se][SO], [Se][HSO], [Se][HSO], [Te][HSO], [Te][HSO] and [Te][SO]. In the case of tellurium compounds, this represents the first stabilization and solid-state investigations of the species from chlorosulfuric acid/sulfur trioxide-based media, although the respective colorful solutions are known for over 200 years. The unusual cation-anion interactions were investigated density functional theory (DFT) calculations, , MEP surface plots, QTAIM and NBO analyses. The non-covalent interactions (chalcogen bonding (ChB)) within the novel species reveal different binding modes, namely bifurcated (Ch⋯O,O or Ch,Ch⋯O) and standard (Ch⋯O) σ-hole interactions. We show that the [Se] dication exhibits electrophilic duality, engaging in σ- and π-hole interactions, and that the stabilization of polycationic chalcogens with oxoanions is enhanced by auxiliary Ch⋯O contacts.
Wan YQ, Zhang YY, Zhang SL
… +8 more, Hao HX, Bai JY, Ma ZJ, Geng L, Wang ZP, Gallagher JF, Li J, Mocilac P
Dalton Trans
· 2026 Jun · PMID 42300808
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A comprehensive study of three novel hydrophilic CHON-compliant ligands, two hydrophilized with longer diethylene glycol chains (DEG-BTrzPhen and DEG-PTD) and one with shorter hydroxyethyl chains (HE-PTD), encompassing s...A comprehensive study of three novel hydrophilic CHON-compliant ligands, two hydrophilized with longer diethylene glycol chains (DEG-BTrzPhen and DEG-PTD) and one with shorter hydroxyethyl chains (HE-PTD), encompassing synthesis, solubility, solvent extraction, coordination, spectral, crystallographic and computational studies is presented herein. Experimental results demonstrated that under weakly acidic conditions, these ligands exhibited selectivity for Am(III) Eu(III), with maximum separation factors (SF) reaching 74, , and 127 for DEG-BTrzPhen, DEG-PTD, and HE-PTD, respectively. Among these ligands, DEG-PTD, a derivative of the well-known PTD, exhibits exceptionally high aqueous solubility, offering a significant technological advantage. With its overall characteristics, being CHON-compliant, selective, cheap, and with high aqueous solubility even at very high concentrations, the DEG-PTD ligand is a viable option for actual industrial applications.
This work reports the synthesis, characterization and study of the photophysical properties of two families of cyclometalated [Pt(C^N)(P^P)]X [C^N = 2-phenylbenzothiazolate (pbt), 1-phenylisoquinolinate (piq)] complexes....This work reports the synthesis, characterization and study of the photophysical properties of two families of cyclometalated [Pt(C^N)(P^P)]X [C^N = 2-phenylbenzothiazolate (pbt), 1-phenylisoquinolinate (piq)] complexes. This study establishes structure-property relationships across variations in the C^N ligand (pbt . piq), the diphosphine backbone [P^P = 1,2-bis(diphenylphosphino)benzene (dppbz), 2,3-bis(diphenylphosphino)pyrazine (dpppyz), 2,2'-bis(diphenylphosphino)-1,1'-binaphthalene (BINAP) and bis[2-(diphenylphosphino)phenyl]ether (DPEphos), and the counteranion [X = PF, NO, [Al(OR)]]. Single-crystal X-ray diffraction reveals well-defined trends in coordination geometry, with wide-bite-angle diphosphines inducing pronounced distortions that correlate with weakened emissive behaviour. The photophysical study shows that the nature of the C^N ligand predominantly governs the excited-state energy landscape: pbt complexes emit in the yellow region with high efficiencies, whereas the more conjugated piq derivatives display red-shifted phosphorescence with longer emission lifetimes. In solution, several complexes exhibit dual fluorescence-phosphorescence emission. All complexes (except 5) act as efficient triplet sensitizers. Guided by their increased photophysical stability and higher solubility, two Krossing-type anion [Al(OR)] based salts were selected as catalysts for the photooxidation of -bromothioanisole under homogeneous conditions. While the pbt derivative shows limited activity, due to catalyst degradation under near-UV irradiation, the piq analogue operates efficiently under mild blue-light excitation (460 nm), achieving 100% conversion with only 1% catalyst loading in 9 hours.
Mayorov NS, Egorov PA, Medvedev AG
… +7 more, Belyaev ES, Filippov OA, Belkova NV, Mikhaylov AA, Sokolov MN, Lev O, Prikhodchenko PV
Dalton Trans
· 2026 Jun · PMID 42300787
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Coordination of hydrogen peroxide by a metal center is the first step in the enzymatic cycle of peroxidases and catalases. Although this process occurs readily in living cells, synthesizing molecular complexes with the H...Coordination of hydrogen peroxide by a metal center is the first step in the enzymatic cycle of peroxidases and catalases. Although this process occurs readily in living cells, synthesizing molecular complexes with the HO ligand remains challenging due to hydrogen peroxide's weaker coordinating ability compared to other polar solvents. To date, structural information on coordination compounds with hydrogen peroxide as a ligand is represented by the crystal structures of a zinc complex and two tin complexes. This work demonstrates that hydrogen peroxide complexes can be prepared from coordinatively saturated compounds, such as indium(III) chloride. Ether compounds like 18-crown-6 or diethyl ether dissolve InCl, enabling its interaction with HO. Three InCl complexes with hydrogen peroxide ligand, [InCl(HO)(HO)]·18-crown-6, [InCl(18-crown-6)][(HO)InCl] and [-InCl(HO)(HO)(18-crown-6)], were isolated under different conditions, presenting a valuable addition to a very small family of structurally characterized HO complexes. The crystal structures of these complexes were characterized by single-crystal X-ray diffraction analysis. DFT calculations unveiled the key role of the hydrogen bonding of the HO ligand with ether molecules enhancing hydrogen peroxide coordination to In(III) center. Variable-temperature H NMR data support the κ-coordination of HO with InCl in ethereal solution.
Attempts to synthesize a phenanthroline palladium(0) complex with an η-coordinated nitrosoarene starting from a palladium(II) precursor and the corresponding aryl hydroxylamine afforded instead apparent palladium(I) meta...Attempts to synthesize a phenanthroline palladium(0) complex with an η-coordinated nitrosoarene starting from a palladium(II) precursor and the corresponding aryl hydroxylamine afforded instead apparent palladium(I) metallacyclic complexes that, on a closer inspection, were proven to be Pd(II) complexes with a new kind of radical-anionic nitrosoarene ligand.
Dang VT, Drena A, Telser J
… +2 more, Wofford L, Nguyen AI
Dalton Trans
· 2026 Jun · PMID 42300661
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Correction for 'A bis-macrocyclic peptide ligand mimicking the β-sandwich active site of multicopper oxidases' by Viet Thuc Dang , , 2026, , 5877-5881, https://doi.org/10.1039/D6DT00494F.Correction for 'A bis-macrocyclic peptide ligand mimicking the β-sandwich active site of multicopper oxidases' by Viet Thuc Dang , , 2026, , 5877-5881, https://doi.org/10.1039/D6DT00494F.
An ongoing goal to use Main Group elements like phosphorus to promote transition metal-type reactivity has received significant attention across the chemistry community. Transition metal (TM) complexes are unique because...An ongoing goal to use Main Group elements like phosphorus to promote transition metal-type reactivity has received significant attention across the chemistry community. Transition metal (TM) complexes are unique because their frontier orbitals are closed spaced with the proper symmetry to activate small molecules and then incorporate them, in the presence of additional substrates, into a two-electron catalytic cycle, affording higher value chemicals. By using multidentate ligands to structurally distort trivalent P-centers into a strained geometry, a frontier orbital environment similar to a TM can be unlocked. This Perspective will highlight specific examples where geometrically confined P(III)-species directly promote bond activation two-electron processes like oxidative addition or phosphorus-ligand cooperativity. In some cases, a second substrate can be introduced, and catalytic transformations like (transfer) hydrogenation, hydroboration, hydrodefluorination, hydrosilylation, . that normally occur with transition metal complexes can be achieved. Related two-electron functionalization processes with P-heterocycles that hinge on manipulating strain will also be discussed.
Gutorova SV, Matveev PI, Evsiunina MV
… +12 more, Wang Q, Lemport PS, Kalle P, Koshelev DS, Utochnikova VV, Averin AA, Poliakova TR, Gerasimov MA, Petrov VG, Ustynyuk YA, Kalmykov SN, Nenajdenko VG
Dalton Trans
· 2026 Jun · PMID 42300632
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Tetradentate phenanthroline-based ligands have demonstrated ability to efficiently extract uranium(VI) from nitric acid solutions. While their coordination with U(VI) has been extensively studied, their behavior toward t...Tetradentate phenanthroline-based ligands have demonstrated ability to efficiently extract uranium(VI) from nitric acid solutions. While their coordination with U(VI) has been extensively studied, their behavior toward tetravalent actinides under conditions relevant to spent nuclear fuel reprocessing remains poorly understood. Here, we investigated the extraction and coordination chemistry of Th(IV) in the presence of excess U(VI). Using a combination of solvent extraction, UV-Vis and Raman, we demonstrated that when the organic phase is pre-loaded with the uranyl ion pair [UOL(NO)][UO(NO)], Th(IV) undergoes a selective anion-exchange reaction with the trinitratouranyl anion, forming the mixed ion pair [UOL(NO)][Th(HO)(NO)]. Single-crystal X-ray diffraction further confirms the formation of heterometallic U-Th complexes, including ([UOL(NO)])[Th(NO)], providing direct structural evidence for mixed-metal ion pairing. These results revealed a previously unrecognized mechanism of Th(IV) uptake driven by anion exchange rather than direct ligand coordination.
Shinziya H, Das AK, Suresh S
… +5 more, Saha U, Karan G, Choudhury SM, Brandao P, Dolai M
Dalton Trans
· 2026 Jun · PMID 42300629
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Ferric ions (Fe) play essential roles in oxygen transport and enzymatic processes, while their dysregulation is associated with disorders such as anaemia and cancer. In this study, we report the design of a fluorescent p...Ferric ions (Fe) play essential roles in oxygen transport and enzymatic processes, while their dysregulation is associated with disorders such as anaemia and cancer. In this study, we report the design of a fluorescent probe, HMC, for the selective and reversible detection of Fe. The probe displays weak intrinsic emission but exhibits a "turn-on" fluorescence response, shifting from colourless to green upon Fe binding, with a detection limit of 1.86 μM. The Fe-induced emission is reversible through NaEDTA treatment. Furthermore, HMC exhibited sensitivity in biological studies through a specific interaction with calf-thymus DNA (ct-DNA), which resulted in a hypsochromic shift and threefold fluorescence enhancement (LOD ∼4.92 μM), while binding to bovine serum albumin (BSA) produced a strong emission increase with a new peak at 481 nm (LOD ∼4.8 × 10 μM). The experimental studies were supported by molecular docking, revealing strong binding affinities of HMC to ct-DNA (-10.3 kcal mol) and BSA (-12.4 kcal mol). HMC exhibited pronounced fluorescence enhancement upon interaction with Fe, enabling efficient detection in biological samples, and showed moderate dose-dependent cytotoxicity against MCF-7 breast cancer cells as confirmed by MTT assays.
Vargas P, Venâncio MF, Rocha WR
… +2 more, Suarez SA, Doctorovich FA
Dalton Trans
· 2026 Jun · PMID 42300622
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Sodium dithionite is a widely used reductant in biochemical and industrial applications, yet its intrinsic instability and complex redox chemistry continue to pose challenges for mechanistic interpretation. One relativel...Sodium dithionite is a widely used reductant in biochemical and industrial applications, yet its intrinsic instability and complex redox chemistry continue to pose challenges for mechanistic interpretation. One relatively underexplored aspect is its reactivity with nitric oxide (NO˙), a small redox-active signalling molecule. While dithionite is commonly employed to reduce metal centres in enzymes, its potential interaction with NO˙ may influence experimental outcomes in aqueous redox systems. Here, we show that under anaerobic, near-neutral aqueous conditions, dithionite reacts with NO˙ leading to the formation of azanone (HNO, nitroxyl), the one-electron-reduced and protonated congener of nitric oxide. Formation of HNO is supported by direct trapping experiments using Mn(III) porphyrins and by indirect detection of NO, a characteristic product of HNO dimerization. These findings reveal a previously overlooked route for HNO generation in dithionite-containing systems and highlight potential artefacts in biochemical experiments involving NO˙ and strong reductants, particularly in studies probing thiol reactivity or metalloprotein function.
Dalton Trans
· 2026 Jun · PMID 42300606
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Developing robust and efficient heterogeneous catalysts remains a key challenge in catalytic organic transformations. In this work, a lacunary polyoxometalate-based catalyst (LPOM) was synthesized and subsequently functi...Developing robust and efficient heterogeneous catalysts remains a key challenge in catalytic organic transformations. In this work, a lacunary polyoxometalate-based catalyst (LPOM) was synthesized and subsequently functionalized with 3-(aminopropyl)trimethoxysilane (APTMS) and then 1,3-propanesultone (1,3-PS) to achieve LPOM/APTMS/1,3-PS. Comprehensive characterization using various physicochemical techniques confirmed the successful modification of the lacunary POM framework with desired functional groups. The catalytic behavior of the prepared material was assessed through two representative transformations: the ring-opening of styrene oxide and the esterification of oleic acid with methanol toward biodiesel synthesis. The catalyst demonstrated remarkable efficiency, delivering 99% conversion of styrene oxide within 10 min and 98% oleic acid conversion within 2 h. Moreover, it maintained excellent structural integrity and catalytic efficiency over four consecutive cycles. These findings demonstrate the potential of LPOM/APTMS/1,3-PS as a stable, highly efficient, and environmentally benign catalyst for sustainable organic transformations and biofuel synthesis.
Duffy DH, Sembukuttiarachchige D, Yaddehige AK
… +8 more, Sinhababu S, Wilson MM, Goodrich A, Unruh DK, Shores MP, Shaw SK, Vlaisavljevich B, Daly SR
Dalton Trans
· 2026 Jun · PMID 42300565
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We report dinuclear Mn(II) and Co(II) complexes supported by triaryl tetradentate ligands derived from -phenylenediamide that are flanked by different metal-donor substituents (X = NMe SMe). Single-crystal XRD data revea...We report dinuclear Mn(II) and Co(II) complexes supported by triaryl tetradentate ligands derived from -phenylenediamide that are flanked by different metal-donor substituents (X = NMe SMe). Single-crystal XRD data revealed that the Mn complexes (Mn-1 and Mn-2) both possess MnN diamond cores with relatively similar bond distances, electronic structures, and magnetic properties regardless of the ligand identity. The Co complexes, by contrast, revealed dramatic substituent-dependent differences. Like Mn, the Co complexes were dinuclear, but their core structures varied from open (X = NMe; no μ-N bridging; Co-1a) to closed (X = SMe; intact CoN diamond core; Co-2), with a second structure isolated with X = NMe in between (semi-open core; Co-1b). Of the three structures, Co-2 had the shortest metal-metal distance of 2.4540(8) Å, just at the onset of that expected for Co-Co bonding. Evidence of an appreciable metal-metal interaction in Co-2 was revealed with a unique UV-vis absorption at 516 nm that was assigned to metal-metal charge transfer (MMCT). Moreover, magnetic measurements conducted on Co-2 revealed a magnetic moment of 1.2 at room temperature, which was much lower than that of other Co and Mn complexes. Active space calculations corroborated the experimental observations and suggested that Co-2 possesses a weak metal-metal bond with a low effective bond order of 0.24. These findings, which are compared to those previously reported for Fe(II) and Cr(II) complexes with the same ligands, reveal the marked influence that metal identity has on the structures, magnetic properties, and metal-metal bonding within this family of triaryl tetradentate ligands.
Lepage M, Devos M, Touaibia S
… +2 more, Hanan GS, Cibian M
Dalton Trans
· 2026 Jun · PMID 42300559
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An -bridged bis-amidine -oxide (AMOX) ligand was synthesized, characterized, and used as a synthon for AMOX-based supramolecular architectures. Different multimetallic compounds were obtained upon its coordination with t...An -bridged bis-amidine -oxide (AMOX) ligand was synthesized, characterized, and used as a synthon for AMOX-based supramolecular architectures. Different multimetallic compounds were obtained upon its coordination with transition metal ions: a dinuclear discrete assembly with Ni(II) and a luminescent Zn(II) 1D-metallopolymer, as confirmed by their solid-state structures.