1
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Zeng C, Xu QD, Liu XL, Hu SM, Wu XT, Sheng TL. Different delocalized ranges in mixed valence cyanido-metal-bridged Fe-Ru-Fe complexes controlled by terminal ligand substitution modification. Dalton Trans 2023; 52:16858-16869. [PMID: 37910432 DOI: 10.1039/d3dt02208k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
In order to investigate the properties of metal to metal charge transfer (MMCT) influenced by the relative energy level between the bridging unit and the terminal unit, two groups of heterotrimetallic cyanido-metal-bridged complexes, trans-[Cp(dppe)Fe-CN-Ru(MeOpy)4-NC-Fe(dppe)Cp][X]n (1[X]n; n = 2, 3, or 4; X = PF6 or BF4) (Cp = cyclopentadiene, dppe = 1,2-bis(diphenylphosphino)ethane, MeOpy = 4-methoxypyridine) and [Cp*(dppe)Fe-CN-Ru(MeOpy)4-NC-Fe(dppe)Cp*] [X]n (2[X]n; Cp* = 1,2,3,4,5-pentamethylcyclopentadiene; n = 2, 3, or 4; X = PF6 or BF4) were synthesized and fully characterized. The crystallography data suggest different oxidation sites in the ground state for one-electron oxidation products 13+ and 23+, and the electrochemical and Mössbauer spectra suggest that in the one-electron oxidation compounds 13+, the charge is delocalized all along the trimetal backbone Fe-Ru-Fe, while in 23+, the charge is rather delocalized between the two metal parts Fe-Ru. Further oxidation of N3+ gives N4+ (N = 1 or 2), during which a spin transfer towards the terminal units is observed in both series.
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Affiliation(s)
- Chen Zeng
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P.R. China.
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Qing-Dou Xu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P.R. China.
| | - Xiao-Lin Liu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P.R. China.
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Sheng-Min Hu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P.R. China.
| | - Xin-Tao Wu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P.R. China.
| | - Tian-Lu Sheng
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P.R. China.
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2
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Ramírez-Wierzbicki I, Pieslinger GE, Aramburu-Trošelj BM, Abate PO, Cadranel A. Ru Monoimines with Extended Excited-State Lifetimes and Geometrical Modulation of Photoinduced Mixed-Valence Interactions. Inorg Chem 2023; 62:3808-3816. [PMID: 36802519 DOI: 10.1021/acs.inorgchem.2c04054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
The photophysical properties of monodentate-imine ruthenium complexes do not usually fulfil the requirements for supramolecular solar energy conversion schemes. Their short excited-state lifetimes, like the 5.2 ps metal-to-ligand charge transfer (MLCT) lifetime of [Ru(py)4Cl(L)]+ with L = pz (pyrazine), preclude bimolecular or long-range photoinduced energy or electron transfer reactions. Here, we explore two strategies to extend the excited-state lifetime, based on the chemical modification of the distal N atom of pyrazine. On one hand, we used L = pzH+, where protonation stabilized MLCT states, rendering thermal population of MC states less favorable. On the other hand, we prepared a symmetric bimetallic arrangement in which L = {(μ-pz)Ru(py)4Cl} to enable hole delocalization via photoinduced mixed-valence interactions. A lifetime extension of 2 orders of magnitude is accomplished, with charge transfer excited states living 580 ps and 1.6 ns, respectively, reaching compatibility with bimolecular or long-range photoinduced reactivity. These results are similar to those obtained with Ru pentaammine analogues, suggesting that the strategy employed is of general applicability. In this context, the photoinduced mixed-valence properties of the charge transfer excited states are analyzed and compared with those of different analogues of the Creutz-Taube ion, demonstrating a geometrical modulation of the photoinduced mixed-valence properties.
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Affiliation(s)
- Ivana Ramírez-Wierzbicki
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.,CONICET─Universidad de Buenos Aires, Instituto de Química Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| | - German E Pieslinger
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.,CONICET─Universidad de Buenos Aires, Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Junín 956, C1113AAD Buenos Aires, Argentina
| | - Bruno M Aramburu-Trošelj
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.,CONICET─Universidad de Buenos Aires, Instituto de Química Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| | - Pedro O Abate
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.,CONICET─Universidad de Buenos Aires, Instituto de Química Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| | - Alejandro Cadranel
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.,CONICET─Universidad de Buenos Aires, Instituto de Química Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.,Department Chemie und Pharmazie, Physikalische Chemie Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, Erlangen 91058, Germany.,Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Egerlandstr. 3, Erlangen 91058, Germany
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3
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Ramírez‐Wierzbicki I, Cotic A, Cadranel A. Photoinduced Intervalence Charge Transfers: Spectroscopic Tools to Study Fundamental Phenomena and Applications. Chemphyschem 2022; 23:e202200384. [PMID: 35785464 PMCID: PMC9805035 DOI: 10.1002/cphc.202200384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/01/2022] [Indexed: 01/09/2023]
Abstract
The exploitation of excited state chemistry for solar energy conversion or photocatalysis has been continuously increasing, and the needs of a transition to a sustainable human development indicate this trend will continue. In this scenario, the study of mixed valence systems in the excited state offers a unique opportunity to explore excited state electron transfer reactivity, and, in a broader sense, excited state chemistry. This Concept article analyzes recent contributions in the field of photoinduced mixed valence systems, i. e. those where the mixed valence core is absent in the ground state but created upon light absorption. The focus is on the utilization of photoinduced intervalence charge transfer bands, detected via transient absorption spectroscopy, as key tools to study fundamental phenomena like donor/acceptor inversion, hole delocalization, coexistence of excited states and excited state nature, together with applications in molecular electronics.
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Affiliation(s)
- Ivana Ramírez‐Wierzbicki
- Instituto de Química Física de MaterialesMedio Ambiente y Energía (INQUIMAE)CONICET – Universidad de Buenos AiresPabellón 2, Ciudad UniversitariaC1428EHABuenos AiresArgentina
- Departamento de Química InorgánicaAnalítica y Química FísicaUniversidad de Buenos AiresFacultad de Ciencias Exactas y NaturalesPabellón 2, Ciudad UniversitariaC1428EHABuenos AiresArgentina
| | - Agustina Cotic
- Instituto de Química Física de MaterialesMedio Ambiente y Energía (INQUIMAE)CONICET – Universidad de Buenos AiresPabellón 2, Ciudad UniversitariaC1428EHABuenos AiresArgentina
- Departamento de Química InorgánicaAnalítica y Química FísicaUniversidad de Buenos AiresFacultad de Ciencias Exactas y NaturalesPabellón 2, Ciudad UniversitariaC1428EHABuenos AiresArgentina
| | - Alejandro Cadranel
- Instituto de Química Física de MaterialesMedio Ambiente y Energía (INQUIMAE)CONICET – Universidad de Buenos AiresPabellón 2, Ciudad UniversitariaC1428EHABuenos AiresArgentina
- Departamento de Química InorgánicaAnalítica y Química FísicaUniversidad de Buenos AiresFacultad de Ciencias Exactas y NaturalesPabellón 2, Ciudad UniversitariaC1428EHABuenos AiresArgentina
- Department Chemie und PharmaziePhysikalische ChemieFriedrich-Alexander-Universität Erlangen-NürnbergEgerlandstraße 391058ErlangenGermany
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4
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Mondal S, Schwederski B, Záliš S, Kaim W. Mixed Valency vs Radical Bridge Formulation in Symmetrically and Asymmetrically Ligated Diruthenium Complexes. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sudipta Mondal
- Universität Stuttgart: Universitat Stuttgart Institut für Anorganische Chemie GERMANY
| | - Brigitte Schwederski
- Universität Stuttgart: Universitat Stuttgart Institut fpür Anoranische Chemie GERMANY
| | - Stanislav Záliš
- Czech Academy of Sciences: Akademie ved Ceske republiky J. Heyrovský Institute of Physical Chemistry CZECH REPUBLIC
| | - Wolfgang Kaim
- Universität Stuttgart Institut für Anorganische Chemie Pfaffenwaldring 55 70550 Stuttgart GERMANY
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5
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A Strongly Coupled Biruthenium Complex as Catalyst for the Water Oxidation Reaction. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Aramburu-Trošelj BM, Ramírez-Wierzbicki I, Scarcasale F, Oviedo PS, Baraldo LM, Cadranel A. Wave-Function Symmetry Control of Electron-Transfer Pathways within a Charge-Transfer Chromophore. J Phys Chem Lett 2020; 11:8399-8405. [PMID: 32924492 DOI: 10.1021/acs.jpclett.0c02167] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Despite a diverse manifold of excited states available, it is generally accepted that the photoinduced reactivity of charge-transfer chromophores involves only the lowest-energy excited state. Shining a visible-light laser pulse on an aqueous solution of the chromophore-quencher [Ru(tpy)(bpy)(μNC)OsIII(CN)5]- assembly (tpy = 2,2';6,2''-terpyridine and bpy = 2,2'-bipyridine), we prepared a mixture of two charge-transfer excited states with different wave-function symmetry. We were able to follow, in real time, how these states undergo separate electron-transfer reaction pathways. As a consequence, their lifetimes differ in 3 orders of magnitude. Implicit are energy barriers high enough to prevent internal conversion within early excited-state populations, shaping isolated electron-transfer channels in the excited-state potential energy surface. This is relevant not only for supramolecular donor/acceptor chemistry with restricted donor/acceptor relative orientations. These energy barriers provide a means to avoid chemical potential dissipation upon light absorption in any molecular energy conversion scheme, and our observations invite to explore wave-function symmetry-based strategies to engineer these barriers.
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Affiliation(s)
- Bruno M Aramburu-Trošelj
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| | - Ivana Ramírez-Wierzbicki
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| | - Franco Scarcasale
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| | - Paola S Oviedo
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| | - Luis M Baraldo
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| | - Alejandro Cadranel
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
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7
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Domínguez SE, Pieslinger GE, Sanchez-Merlinsky L, Baraldo LM. Does geometry matter? Effect of the ligand position in bimetallic ruthenium polypyridine siblings. Dalton Trans 2020; 49:4125-4135. [PMID: 32150187 DOI: 10.1039/d0dt00040j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we present the preparation of a complex [(tpy)(bpy)Ru(μ-CN)Ru(py)4(OH2)](PF6)3 (tpy = 2,2',6',2''-terpyridine; bpy = 2,2'-bipyridine; py = pyridine) that combines a ruthenium chromophore linked to another ruthenium ion that bears a labile position trans to the bridge. Substitution in this position is very attractive, as it allows us to place a quencher trans to the chromophore maximizing the separation between them. This complex allowed us to prepare a family of cyanide-bridged ruthenium polypyridines of general formula [Ru(tpy)(bpy)(μ-CN)Ru(py)4(L)]2/3+ (L = Cl-, NCS-, 4-dimethylaminopyridine or acetonitrile) and compare them with the related complexes [Ru(tpy)(bpy)(μ-CN)Ru(bpy)2(L)]2/3+ where the L ligand lies cis to the bridge. The mixed-valence form of these complexes shows evidence of strong coupling between the ruthenium ions and enhanced delocalization as the redox potential of the {Ru(py)4L} fragment increases. (TD)DFT calculations reproduce very well the experimental spectra of these complexes and indicate that when L = acetonitrile, the hole in the mixed-valence complex is almost equally distributed between both ruthenium ions. For L = DMAP and NCS- the π orbitals of the ligands are mixed with dπ orbitals of the Ru ions, resulting in partial delocalization of the charge on the ligands. The latter result illustrates that the trans configuration of these complexes is well-suited to extend the interaction beyond the bridged ruthenium ions.
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Affiliation(s)
- Sofía E Domínguez
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina. and CONICET - Universidad de Buenos Aires, Instituto de Química Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
| | - German E Pieslinger
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina. and CONICET - Universidad de Buenos Aires, Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Junín 956, C1113AAD, Buenos Aires, Argentina
| | - Luciano Sanchez-Merlinsky
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina. and CONICET - Universidad de Buenos Aires, Instituto de Química Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
| | - Luis M Baraldo
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina. and CONICET - Universidad de Buenos Aires, Instituto de Química Física de Materiales, Medio Ambiente y Energía (INQUIMAE), Pabellón 2, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina
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8
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Aramburu-Trošelj BM, Oviedo PS, Pieslinger GE, Hodak JH, Baraldo LM, Guldi DM, Cadranel A. A Hole Delocalization Strategy: Photoinduced Mixed-Valence MLCT States Featuring Extended Lifetimes. Inorg Chem 2019; 58:10898-10904. [PMID: 31361126 DOI: 10.1021/acs.inorgchem.9b01254] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bimetallic trans-[RuII(tpm)(bpy)(μNC)RuII(L)4(CN)]2+, where bpy is 2,2'-bipyridine, tpm is tris(1-pyrazolyl)methane and L = 4-methoxypyridine (MeOpy) or pyridine (py), was examined using ultrafast vis-NIR transient absorption spectroscopy. Of great relevance are the longest-lived excited states in the form of strongly coupled photoinduced mixed-valence systems, which exhibit intense photoinduced absorptions in the NIR and are freely tunable by the judicious choice of the coordination spheres of the metallic ions. Using the latter strategy, we succeeded in tailoring the excited state lifetimes of bimetallic complexes and, in turn, achieving significantly longer values relative to related monometallic complexes. Notable is the success in extending the lifetimes, when considering the higher density of vibrational states, as they are expected to facilitate nonradiative ground-state recovery.
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Affiliation(s)
- Bruno M Aramburu-Trošelj
- Universidad de Buenos Aires , Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física , Pabellón 2, Ciudad Universitaria, C1428EHA , Buenos Aires , Argentina.,CONICET - Universidad de Buenos Aires , Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE) , Pabellón 2, Ciudad Universitaria, C1428EHA , Buenos Aires , Argentina
| | - Paola S Oviedo
- Universidad de Buenos Aires , Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física , Pabellón 2, Ciudad Universitaria, C1428EHA , Buenos Aires , Argentina.,CONICET - Universidad de Buenos Aires , Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE) , Pabellón 2, Ciudad Universitaria, C1428EHA , Buenos Aires , Argentina
| | - German E Pieslinger
- Universidad de Buenos Aires , Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física , Pabellón 2, Ciudad Universitaria, C1428EHA , Buenos Aires , Argentina.,CONICET - Universidad de Buenos Aires , Instituto de Química y Fisicoquímica Biológicas (IQUIFIB) , Junín 956 , C1113AAD , Buenos Aires , Argentina
| | - José H Hodak
- Universidad de Buenos Aires , Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física , Pabellón 2, Ciudad Universitaria, C1428EHA , Buenos Aires , Argentina.,CONICET - Universidad de Buenos Aires , Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE) , Pabellón 2, Ciudad Universitaria, C1428EHA , Buenos Aires , Argentina
| | - Luis M Baraldo
- Universidad de Buenos Aires , Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física , Pabellón 2, Ciudad Universitaria, C1428EHA , Buenos Aires , Argentina.,CONICET - Universidad de Buenos Aires , Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE) , Pabellón 2, Ciudad Universitaria, C1428EHA , Buenos Aires , Argentina
| | - Dirk M Guldi
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials , Friedrich-Alexander-Universität Erlangen-Nürnberg , 91058 , Erlangen , Germany
| | - Alejandro Cadranel
- Universidad de Buenos Aires , Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física , Pabellón 2, Ciudad Universitaria, C1428EHA , Buenos Aires , Argentina.,CONICET - Universidad de Buenos Aires , Instituto de Química-Física de Materiales, Medio Ambiente y Energía (INQUIMAE) , Pabellón 2, Ciudad Universitaria, C1428EHA , Buenos Aires , Argentina.,Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials , Friedrich-Alexander-Universität Erlangen-Nürnberg , 91058 , Erlangen , Germany
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9
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Aramburu-Trošelj BM, Oviedo PS, Ramírez-Wierzbicki I, Baraldo LM, Cadranel A. Inversion of donor–acceptor roles in photoinduced intervalence charge transfers. Chem Commun (Camb) 2019; 55:7659-7662. [DOI: 10.1039/c9cc03483h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Upon MLCT photoexcitation, {(tpy)Ru} becomes the electron acceptor in the mixed valence {(tpy˙−)RuIII−δ-NC-MII+δ} moiety, reversing its role as the electron donor in the ground-state mixed valence analogue.
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Affiliation(s)
- Bruno M. Aramburu-Trošelj
- Universidad de Buenos Aires
- Facultad de Ciencias Exactas y Naturales
- Departamento de Química Inorgánica
- Analítica y Química Física, Pabellón 2
- Ciudad Universitaria
| | - Paola S. Oviedo
- Universidad de Buenos Aires
- Facultad de Ciencias Exactas y Naturales
- Departamento de Química Inorgánica
- Analítica y Química Física, Pabellón 2
- Ciudad Universitaria
| | - Ivana Ramírez-Wierzbicki
- Universidad de Buenos Aires
- Facultad de Ciencias Exactas y Naturales
- Departamento de Química Inorgánica
- Analítica y Química Física, Pabellón 2
- Ciudad Universitaria
| | - Luis M. Baraldo
- Universidad de Buenos Aires
- Facultad de Ciencias Exactas y Naturales
- Departamento de Química Inorgánica
- Analítica y Química Física, Pabellón 2
- Ciudad Universitaria
| | - Alejandro Cadranel
- Universidad de Buenos Aires
- Facultad de Ciencias Exactas y Naturales
- Departamento de Química Inorgánica
- Analítica y Química Física, Pabellón 2
- Ciudad Universitaria
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10
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Cadranel A, Oviedo PS, Alborés P, Baraldo LM, Guldi DM, Hodak JH. Electronic Energy Transduction from {Ru(py) 4} Chromophores to Cr(III) Luminophores. Inorg Chem 2018; 57:3042-3053. [PMID: 29473740 DOI: 10.1021/acs.inorgchem.7b02799] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Despite the large body of work on {Ru(bpy)2} sensitizer fragments, the same attention has not been devoted to their {Ru(py)4} analogues. In this context, we explored the donor-acceptor trans-[Ru(L)4{(μ-NC)Cr(CN)5}2]4-, where L = pyridine, 4-methoxypyridine, 4-dimethylaminopyridine. We report on the synthesis and the crystal structure as well as the electrochemical, spectroscopical, and photophysical properties of these trimetallic complexes, including transient absorption measurements. We observed emission from chromium-centered d-d states upon illuminating into either MLCT or MM'CT absorptions of {Ru(L)4} or {Ru-Cr}, respectively. The underlying energy transfer is as fast as 600 fs with quantum efficiencies ranging from 10% to 100%. These results document that {Ru(py)4} sensitizer fragments are as efficient as {Ru(bpy)2} in short-range energy transfer scenarios.
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Affiliation(s)
- Alejandro Cadranel
- Departamento de Química Analítica, Inorgánica y Química Física & INQUIMAE, Facultad de Ciencias Exactas y Naturales , Universidad de Buenos Aires , Pabellón 2 , Ciudad Universitaria, C1428EHA Buenos Aires , Argentina.,Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) , Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstraße 1-3 , 91058 Erlangen , Germany
| | - Paola S Oviedo
- Departamento de Química Analítica, Inorgánica y Química Física & INQUIMAE, Facultad de Ciencias Exactas y Naturales , Universidad de Buenos Aires , Pabellón 2 , Ciudad Universitaria, C1428EHA Buenos Aires , Argentina
| | - Pablo Alborés
- Departamento de Química Analítica, Inorgánica y Química Física & INQUIMAE, Facultad de Ciencias Exactas y Naturales , Universidad de Buenos Aires , Pabellón 2 , Ciudad Universitaria, C1428EHA Buenos Aires , Argentina
| | - Luis M Baraldo
- Departamento de Química Analítica, Inorgánica y Química Física & INQUIMAE, Facultad de Ciencias Exactas y Naturales , Universidad de Buenos Aires , Pabellón 2 , Ciudad Universitaria, C1428EHA Buenos Aires , Argentina
| | - Dirk M Guldi
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) , Friedrich-Alexander-Universität Erlangen-Nürnberg , Egerlandstraße 1-3 , 91058 Erlangen , Germany
| | - José H Hodak
- Departamento de Química Analítica, Inorgánica y Química Física & INQUIMAE, Facultad de Ciencias Exactas y Naturales , Universidad de Buenos Aires , Pabellón 2 , Ciudad Universitaria, C1428EHA Buenos Aires , Argentina
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11
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Oviedo PS, Pieslinger GE, Cadranel A, Baraldo LM. Exploring the localized to delocalized transition in non-symmetric bimetallic ruthenium polypyridines. Dalton Trans 2017; 46:15757-15768. [PMID: 29095449 DOI: 10.1039/c7dt02422c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we report the evolution of the properties of the inter-valence charge transfer (IVCT) transition in a family of cyanide-bridged ruthenium polypyridines of general formula [RuII(tpy)(bpy)(μ-CN)RuIII(bpy)2(L)]3/4+ (tpy = 2,2',6',2''-terpyridine; bpy = 2,2'-bipyridine; L = Cl-, NCS-, 4-dimethylaminopyridine or acetonitrile). In these complexes, the redox potential difference between both ruthenium centers (ΔE) is systematically modified. A decrease in ΔE causes a red shift of the energy and an intensity enhancement of the observed IVCT transitions. For L = acetonitrile, the IVCT band becomes narrower and asymmetrical, and shows very little dependence on the nature of the solvent, suggesting a delocalized configuration, although a non-symmetrical one. Also, additional electronic transitions of low energy are clearly resolved in this complex. The observed variation in the properties of the IVCT transitions can be understood on the basis of DFT calculations, that point to increasing mixing between the dπ orbitals of both Ru ions.
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Affiliation(s)
- Paola S Oviedo
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA, Buenos Aires, Argentina.
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12
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Alcázar L, Aullón G, Ferrer M, Martínez M. Redox-Assisted Self-Assembly of a Water-Soluble Cyanido-Bridged Mixed Valence {CoIII/FeII}2Square. Chemistry 2016; 22:15227-15230. [DOI: 10.1002/chem.201603482] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Indexed: 02/02/2023]
Affiliation(s)
- Laura Alcázar
- Departament de Química Inorgànica i Orgànica; Secció de Química Inorgànica; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
| | - Gabriel Aullón
- Departament de Química Inorgànica i Orgànica; Secció de Química Inorgànica; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
| | - Montserrat Ferrer
- Departament de Química Inorgànica i Orgànica; Secció de Química Inorgànica; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
| | - Manuel Martínez
- Departament de Química Inorgànica i Orgànica; Secció de Química Inorgànica; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
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13
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Barthelmes K, Jäger M, Kübel J, Friebe C, Winter A, Wächtler M, Dietzek B, Schubert US. Efficient Energy Transfer and Metal Coupling in Cyanide-Bridged Heterodinuclear Complexes Based on (Bipyridine)(terpyridine)ruthenium(II) and (Phenylpyridine)iridium(III) Complexes. Inorg Chem 2016; 55:5152-67. [DOI: 10.1021/acs.inorgchem.5b02919] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Kevin Barthelmes
- Laboratory
of Organic and Macromolecular Chemistry, Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
- Center
for Energy and Environmental Chemistry, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| | - Michael Jäger
- Laboratory
of Organic and Macromolecular Chemistry, Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
- Center
for Energy and Environmental Chemistry, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| | - Joachim Kübel
- Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
- Institute
of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - Christian Friebe
- Laboratory
of Organic and Macromolecular Chemistry, Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
- Center
for Energy and Environmental Chemistry, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| | - Andreas Winter
- Laboratory
of Organic and Macromolecular Chemistry, Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
- Center
for Energy and Environmental Chemistry, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| | - Maria Wächtler
- Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Benjamin Dietzek
- Center
for Energy and Environmental Chemistry, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
- Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
- Institute
of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - Ulrich S. Schubert
- Laboratory
of Organic and Macromolecular Chemistry, Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
- Center
for Energy and Environmental Chemistry, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
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14
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Ansari MA, Mandal A, Paretzki A, Beyer K, Fiedler J, Kaim W, Lahiri GK. 1,5-Diamido-9,10-anthraquinone, a Centrosymmetric Redox-Active Bridge with Two Coupled β-Ketiminato Chelate Functions: Symmetric and Asymmetric Diruthenium Complexes. Inorg Chem 2016; 55:5655-70. [DOI: 10.1021/acs.inorgchem.6b00726] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mohd. Asif Ansari
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Abhishek Mandal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Alexa Paretzki
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Katharina Beyer
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Jan Fiedler
- J. Heyrovský Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-18223 Prague, Czech Republic
| | - Wolfgang Kaim
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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15
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Zhong YW, Gong ZL, Shao JY, Yao J. Electronic coupling in cyclometalated ruthenium complexes. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.01.002] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Mandal A, Hoque MA, Grupp A, Paretzki A, Kaim W, Lahiri GK. Analysis of Redox Series of Unsymmetrical 1,4-Diamido-9,10-anthraquinone-Bridged Diruthenium Compounds. Inorg Chem 2016; 55:2146-56. [DOI: 10.1021/acs.inorgchem.5b02541] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Abhishek Mandal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai−400076, India
| | - Md Asmaul Hoque
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai−400076, India
| | - Anita Grupp
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Alexa Paretzki
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Wolfgang Kaim
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai−400076, India
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17
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Shen JJ, Shao JY, Gong ZL, Zhong YW. Cyclometalated Osmium-Amine Electronic Communication through the p-Oligophenylene Wire. Inorg Chem 2015; 54:10776-84. [PMID: 26567859 DOI: 10.1021/acs.inorgchem.5b01828] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A series of bis-tridentate cyclometalated osmium complexes with a redox-active triarylamine substituent have been prepared, where the amine substituent is separated from the osmium ion by a p-oligophenylene wire of various lengths. X-ray crystallographic data of complexes 3(PF6) and 4(PF6) with three or four repeating phenyl units between the osmium ion and the amine substituent are presented. These complexes show two consecutive anodic redox couples between +0.1 and +0.9 V vs Ag/AgCl, with the potential splitting in the range of 300-390 mV. A combined experimental and theoretical study suggests that, in the one-electron-oxidized state, the odd electron is delocalized for short congeners and localized on the osmium component for long congeners. The electronic coupling parameter (Vab) was estimated by the Marcus-Hush analysis. The distance dependence plot of ln(Vab) versus the osmium-amine geometrical distance (Rab) gives a negative linear relationship with a decay slope of -0.19 Å(-1), which is slightly steeper with respect to the previously reported ruthenium-amine series with the same molecular wire. DFT calculations with the long-range-corrected UCAM-B3LYP functional gave more reasonable results for the osmium complexes with respect to those with UB3LYP.
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Affiliation(s)
- Jun-Jian Shen
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Jiang-Yang Shao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Zhong-Liang Gong
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Yu-Wu Zhong
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
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18
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Yang W, Shao J, Zhong Y. Cyclometalated Diruthenium Complexes Bridged by 3,3′,5,5′‐Tetra(pyrid‐2‐yl)biphenyl: Tuning of Electronic Properties and Intervalence Charge Transfer by Terminal Ligand Effects. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500498] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wen‐Wen Yang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences Bejing 100190, P. R. China, http://zhongyuwu.iccas.ac.cn/
| | - Jiang‐Yang Shao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences Bejing 100190, P. R. China, http://zhongyuwu.iccas.ac.cn/
| | - Yu‐Wu Zhong
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences Bejing 100190, P. R. China, http://zhongyuwu.iccas.ac.cn/
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19
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Cadranel A, Hodak JH. Four chromophores in one building block: synthesis, structure and characterization of trans-[Ru(MQ)4Cl2]4+ and trans-[Ru(4,4’-bpy)4Cl2] (MQ+ = N-methyl-4,4’-bipyridinium, bpy = bipyridine). J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1014351] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Alejandro Cadranel
- Departamento de Química Analítica, Inorgánica y Química Física, INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - José H. Hodak
- Departamento de Química Analítica, Inorgánica y Química Física, INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
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