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Charge Transfer Chromophores Derived from 3d-Row Transition Metal Complexes. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238175. [PMID: 36500270 PMCID: PMC9736222 DOI: 10.3390/molecules27238175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/18/2022] [Accepted: 11/20/2022] [Indexed: 11/25/2022]
Abstract
A series of new charge transfer (CT) chromophores of "α-diimine-MII-catecholate" type (where M is 3d-row transition metals-Cu, Ni, Co) were derived from 4,4'-di-tert-butyl-2,2'-bipyridyl and 3,6-di-tert-butyl-o-benzoquinone (3,6-DTBQ) in accordance with three modified synthetic approaches, which provide high yields of products. A square-planar molecular structure is inherent for monomeric [CuII(3,6-Cat)(bipytBu)]∙THF (1) and NiII(3,6-Cat)(bipytBu) (2) chromophores, while dimeric complex [CoII(3,6-Cat)(bipytBu)]2∙toluene (3) units two substantially distorted heteroleptic D-MII-A (where D, M, A are donor, metal and acceptor, respectively) parts through a donation of oxygen atoms from catecholate dianions. Chromophores 1-3 undergo an effective photoinduced intramolecular charge transfer (λ = 500-715 nm, extinction coefficient up to 104 M-1·cm-1) with a concomitant generation of a less polar excited species, the energy of which is a finely sensitive towards solvent polarity, ensuring a pronounced negative solvatochromic effect. Special attention was paid to energetic characteristics for CT and interacting HOMO/LUMO orbitals that were explored by a synergy of UV-vis-NIR spectroscopy, cyclic voltammetry, and DFT study. The current work sheds light on the dependence of CT peculiarities on the nature of metal centers from various groups of the periodic law. Moreover, the "α-diimine-MII-catecholate" CT chromophores on the base of "late" transition elements with differences in d-level's electronic structure were compared for the first time.
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2
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Pashanova KI, Bitkina VO, Yakushev IA, Arsenyev MV, Piskunov AV. Square-Planar Heteroleptic Complexes of α-Diimine-Ni II-Catecholate Type: Intramolecular Ligand-to-Ligand Charge Transfer. Molecules 2021; 26:4622. [PMID: 34361775 PMCID: PMC8347615 DOI: 10.3390/molecules26154622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 12/05/2022] Open
Abstract
Two heteroleptic NiII complexes combined the redox-active catecholate and 2,2'- bipyridine ligand platforms were synthesized to observe a photoinduced intramolecular ligand-to-ligand charge transfer (LL'CT, HOMOcatecholate → LUMOα-diimine). A molecular design of compound [NiII(3,6-Cat)(bipy)]∙CH3CN (1) on the base of bulky 3,6-di-tert-butyl-o-benzoquinone (3,6-DTBQ) was an annelation of the ligand with an electron donor glycol fragment, producing derivative [NiII(3,6-Catgly)(bipy)]∙CH2Cl2 (2), in order to influence the energy of LL'CT transition. A substantial longwave shift of the absorption peak was observed in the UV-Vis-NIR spectra of 2 compared with those in 1. In addition, the studied NiII derivatives demonstrated a pronounced negative solvatochromism, which was established using a broad set of solvents. The molecular geometry of both compounds can be ascribed as an insignificantly distorted square-planar type, and the π-π intermolecular stacking of the neighboring α-diimines is realized in a crystal packing. There is a lamellar crystal structure for complex 1, whereas the perpendicular T-motifs with the inter-stacks attractive π-π interactions form the packing of complex 2. The redox-active nature of ligand systems was clearly shown through the electrochemical study: a quasi-reversible one-electron reduction of 2,2'-bipyridine and two reversible successive one-electron oxidative conversations ("catecholate dianion-o-benzosemiquinonato radical anion-neutral o-benzoquinone") were detected.
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Affiliation(s)
- Kira I. Pashanova
- Laboratory of Metal Complexes with Redox-Active Ligands, G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina Street, 603137 Nizhny Novgorod, Russia; (K.I.P.); (V.O.B.); (M.V.A.)
| | - Vladlena O. Bitkina
- Laboratory of Metal Complexes with Redox-Active Ligands, G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina Street, 603137 Nizhny Novgorod, Russia; (K.I.P.); (V.O.B.); (M.V.A.)
| | - Ilya A. Yakushev
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninski Prospect, 119991 Moscow, Russia;
| | - Maxim V. Arsenyev
- Laboratory of Metal Complexes with Redox-Active Ligands, G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina Street, 603137 Nizhny Novgorod, Russia; (K.I.P.); (V.O.B.); (M.V.A.)
| | - Alexandr V. Piskunov
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninski Prospect, 119991 Moscow, Russia;
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3
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Merillas B, Cuéllar E, Diez-Varga A, Torroba T, García-Herbosa G, Fernández S, Lloret-Fillol J, Martín-Alvarez JM, Miguel D, Villafañe F. Luminescent Rhenium(I)tricarbonyl Complexes Containing Different Pyrazoles and Their Successive Deprotonation Products: CO 2 Reduction Electrocatalysts. Inorg Chem 2020; 59:11152-11165. [PMID: 32705866 DOI: 10.1021/acs.inorgchem.0c01654] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Cationic fac-[Re(CO)3(pz*H)(pypzH)]OTf (pz*H = pyrazole, pzH; 3,5-dimethylpyrazole, dmpzH; indazole, indzH; 3-(2-pyridyl)pyrazole, pypzH) were obtained from fac-[ReBr(CO)3(pypzH)] by halide abstraction with AgOTf and subsequent addition of the corresponding pyrazole. Successive deprotonation with Na2CO3 and NaOH gave neutral fac-[Re(CO)3(pz*H)(pypz)] and anionic Na{fac-[Re(CO)3(pz*)(pypz)]} complexes, respectively. Cationic fac-[Re(CO)3(pz*H)(pypzH)]OTf, neutral complexes fac-[Re(CO)3(pz*H)(pypz)], and fac-[Re(CO)3(pypz)2Na] were subjected to photophysical and electrochemical studies. They exhibit phosphorescent decays from a prevalently 3MLCT excited state with quantum yields (Φ) in the range between 0.03 and 0.58 and long lifetimes (τ from 220 to 869 ns). The electrochemical behavior in Ar atmosphere of cationic and neutral complexes indicates that the oxidation processes assigned to ReI → ReII occurs at lower potentials for the neutral complex compared to cationic complex. The reduction processes occur at the ligands and do not depend on the charge of the complexes. The electrochemical behavior in CO2 saturated media is consistent with CO2 electrocatalyzed reduction, where the values of the catalytic activity [icat(CO2)/icat(Ar)] ranged from 2.7 to 11.5 (compared to 8.1 for fac-[Re(CO)3Cl(bipy)] studied as a reference). Controlled potential electrolysis for the pyrazole cationic (3a) and neutral (4a) complexes after 1 h affords CO in faraday yields of 61 and 89%, respectively. These values are higher for indazole complexes and may be related to the acidity of the coordinated pyrazole.
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Affiliation(s)
- Beatriz Merillas
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Elena Cuéllar
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Alberto Diez-Varga
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, 09001 Burgos, Spain
| | - Tomás Torroba
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, 09001 Burgos, Spain
| | - Gabriel García-Herbosa
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, 09001 Burgos, Spain
| | - Sergio Fernández
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avinguda Països Catalans 16, 43007 Tarragona, Spain.,Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluïs Companys, 23, 08010 Barcelona, Spain
| | - Jose M Martín-Alvarez
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Daniel Miguel
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Fernando Villafañe
- GIR MIOMeT-IU Cinquima-Química Inorgánica, Facultad de Ciencias, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
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4
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Kia R, Kalaghchi A. Intra- and intermolecular interactions in a series of chlorido-tricarbonyl-diazabutadienerhenium(I) complexes: structural and theoretical studies. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2020; 76:417-426. [PMID: 32831260 DOI: 10.1107/s2052520620004333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
A series of new chlorido-tricarbonylrhenium(I) complexes bearing alkyl-substituted diazabutadiene (DAB) ligands, namely N,N'-bis(2,4-dimethylbenzene)-1,4-diazabutadiene (L1), N,N'-bis(2,4-dimethylbenzene)-2,3-dimethyl-1,4-diazabutadiene (L2), N,N'-bis(2,4,6-trimethylbenzene)-2,3-dimethyl-1,4-diazabutadiene (L3) and N,N'-bis(2,6-diisopropylbenzene)-1,4-diazabutadiene (L4), were synthesized and investigated. The crystal structures have been fully characterized by X-ray diffraction and spectroscopic methods. Density functional theory, natural bond orbital and non-covalent interaction index methods have been used to study the optimized geometry in the gas phase and intra- and intermolecular interactions in the complexes, respectively. The most important studied interactions in these metal carbonyl complexes are n→π*, n→σ* and π→π*. Among complexes 1-4, only 2 shows interesting intermolecular n→π* interactions due to lp(C[triple-bond]O)...π* and lp(Cl)...π* (lp = lone pair) contacts.
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Affiliation(s)
- Reza Kia
- Department of Chemistry, Sharif University of Technology, Tehran, 11155-3516, Iran
| | - Azadeh Kalaghchi
- Department of Chemistry, Sharif University of Technology, Tehran, 11155-3516, Iran
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5
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Akabar N, Chaturvedi V, Shillito GE, Schwehr BJ, Gordon KC, Huff GS, Sutton JJ, Skelton BW, Sobolev AN, Stagni S, Nelson DJ, Massi M. Photophysical and biological investigation of phenol substituted rhenium tetrazolato complexes. Dalton Trans 2019; 48:15613-15624. [PMID: 31408065 DOI: 10.1039/c9dt02198a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis, structural and photophysical characterisation of four tricarbonyl rhenium(i) complexes bound to 1,10-phenanthroline and a tetrazolato ancillary ligand are reported. The complexes are differentiated by the nature (hydroxy or methoxy) and position (meta or para) of the substituent attached to the phenyl ring in conjugation to the tetrazole ring. The complexes exhibit phosphorescence emission from triplet charge transfer excited states, with the maxima around 600 nm, excited state lifetime decays in the 200-300 ns range, and quantum yield values of 4-6% in degassed acetonitrile solutions. The nature and position of the substituent does not significantly affect the photophysical properties, which remain unchanged even after deprotonation of the hydroxide group on the phenol ring. The interpretation of the photophysical data was further validated by resonance Raman spectroscopy and time-dependent density functional theory calculations. All the complexes are internalised within cells, albeit to variable degrees. As highlighted by a combination of flow cytometry and confocal microscopy, the species display diffuse cytoplasmic localisation except for the complex with the hydroxy functional group at the para position, which reveals lower accumulation in cells and more pronounced punctate staining. Overall, the complexes displayed low levels of cytotoxicity.
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Affiliation(s)
- Nurshadrina Akabar
- School of Molecular and Life Sciences, Curtin Institute for Functional Materials and Interfaces, Curtin University, Bentley WA, Australia.
| | - Vishal Chaturvedi
- School of Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley WA, Australia
| | - Georgina E Shillito
- Department of Chemistry Te Tari HuaRuanuk, University of Otago, Dunedin, New Zealand
| | - Bradley J Schwehr
- School of Molecular and Life Sciences, Curtin Institute for Functional Materials and Interfaces, Curtin University, Bentley WA, Australia.
| | - Keith C Gordon
- Department of Chemistry Te Tari HuaRuanuk, University of Otago, Dunedin, New Zealand
| | - Gregory S Huff
- Department of Chemistry Te Tari HuaRuanuk, University of Otago, Dunedin, New Zealand
| | - Joshua J Sutton
- Department of Chemistry Te Tari HuaRuanuk, University of Otago, Dunedin, New Zealand
| | - Brian W Skelton
- School of Molecular Sciences and CMCA, The University of Western Australia, Perth WA, Australia
| | - Alexandre N Sobolev
- School of Molecular Sciences and CMCA, The University of Western Australia, Perth WA, Australia
| | - Stefano Stagni
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, Bologna, Italy
| | - Delia J Nelson
- School of Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley WA, Australia
| | - Massimiliano Massi
- School of Molecular and Life Sciences, Curtin Institute for Functional Materials and Interfaces, Curtin University, Bentley WA, Australia.
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6
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Ayadi A, Branzea DG, Allain M, Canevet D, Dinçalp H, El-Ghayoury A. Coordination entities of a pyrene-based iminopyridine ligand: Structural and photophysical properties. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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7
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Jimenez J, Chakraborty I, Mascharak P. Synthesis and crystal structure of tri-carbonyl-chlorido-{1-[(pyridin-2-yl-methyl-idene)amino]-adamantane}rhenium(I). Acta Crystallogr E Crystallogr Commun 2016; 72:1276-1279. [PMID: 27920916 PMCID: PMC5120706 DOI: 10.1107/s205698901601255x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 08/03/2016] [Indexed: 11/10/2022]
Abstract
The title compound, [ReCl(pyAm)(CO)3], where pyAm is 1-[(pyridin-2-yl-methyl-idene)amino]-adamantane (C16H20N2), was synthesized from the reaction of [ReCl(CO)5] and pyAm in an equimolar ratio. The ReI atom resides in an octa-hedral C3ClN2 coordination sphere. The Re-C bond trans to the chloride ligand is noticeably longer compared to the other two Re-C distances. Weak C-H⋯Cl hydrogen-bonding inter-actions consoldiate the packing of the mol-ecules. In this design, the pyAm ligand was employed due to its well-known pharmacokinetic properties.
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Affiliation(s)
- Jorge Jimenez
- Department of Chemistry, University of California Santa Cruz, CA 95064, USA
| | | | - Pradip Mascharak
- Department of Chemistry, University of California Santa Cruz, CA 95064, USA
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8
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Ayadi A, El Alamy A, Alévêque O, Allain M, Zouari N, Bouachrine M, El-Ghayoury A. Tetrathiafulvalene-based azine ligands for anion and metal cation coordination. Beilstein J Org Chem 2015; 11:1379-91. [PMID: 26425193 PMCID: PMC4578403 DOI: 10.3762/bjoc.11.149] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 07/12/2015] [Indexed: 11/23/2022] Open
Abstract
The synthesis and full characterization of two tetrathiafulvalene-appended azine ligands, namely 2-([2,2’-bi(1,3-dithiolylidene)]-4-yl)-6-((2,4-dinitrophenyl)hydrazono)methyl)pyridine (L1) and 5-([2,2’-bi(1,3-dithiolylidene)]-4-yl)-2-((2,4-dinitrophenyl)hydrazono)methyl)pyridine (L2) are described. The crystal structure of ligand L1 indicates that the ligand is completely planar with the presence of a strong intramolecular N3–H3···O1 hydrogen bonding. Titration experiments with inorganic anions showed that both ligands are suitable candidates for the sensing of fluoride anions. Ligand L2 was reacted with a Re(I) cation to yield the corresponding rhenium tricarbonyl complex 3. In the crystal structure of the newly prepared electroactive rhenium complex the TTF is neutral and the rhenium cation is hexacoordinated. The electrochemical behavior of the three compounds indicates that they are promising for the construction of crystalline radical cation salts.
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Affiliation(s)
- Awatef Ayadi
- Laboratoire MOLTECH Anjou, Université d'Angers, UFR Sciences, UMR 6200, CNRS, Bât. K, 2 Bd. Lavoisier, 49045 Angers Cedex, France ; Laboratoire de Physico-chimie de l'état solide, Université de Sfax, Route de Soukra; Km 4; BP: 802, 3038, Sfax, Tunisia
| | - Aziz El Alamy
- MEM, High School of Technology (ESTM), University, Moulay Ismail, Meknès, Morocco
| | - Olivier Alévêque
- Laboratoire MOLTECH Anjou, Université d'Angers, UFR Sciences, UMR 6200, CNRS, Bât. K, 2 Bd. Lavoisier, 49045 Angers Cedex, France
| | - Magali Allain
- Laboratoire MOLTECH Anjou, Université d'Angers, UFR Sciences, UMR 6200, CNRS, Bât. K, 2 Bd. Lavoisier, 49045 Angers Cedex, France
| | - Nabil Zouari
- Laboratoire de Physico-chimie de l'état solide, Université de Sfax, Route de Soukra; Km 4; BP: 802, 3038, Sfax, Tunisia
| | - Mohammed Bouachrine
- MEM, High School of Technology (ESTM), University, Moulay Ismail, Meknès, Morocco
| | - Abdelkrim El-Ghayoury
- Laboratoire MOLTECH Anjou, Université d'Angers, UFR Sciences, UMR 6200, CNRS, Bât. K, 2 Bd. Lavoisier, 49045 Angers Cedex, France
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9
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Li XL, Zhang Z, Zhang XL, Kang JL, Wang AL, Zhou L, Fang S. A pair of dinuclear Re(i) enantiomers: synthesis, crystal structures, chiroptical and ferroelectric properties. Dalton Trans 2015; 44:4180-5. [DOI: 10.1039/c4dt03884c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A pair of dinuclear Re(i) enantiomers have been successfully synthesized, representing the first example of polynuclear Re(i) complexes with ferroelectric properties and possessing a multifunctional feature combining chirality, NLO-activity and ferroelectricity within one molecule.
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Affiliation(s)
- Xi-Li Li
- Henan Provincial Key Laboratory of Surface and Interface Science
- Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- China
| | - Zhiqiang Zhang
- Henan Provincial Key Laboratory of Surface and Interface Science
- Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- China
| | - Xue-Li Zhang
- Henan Provincial Key Laboratory of Surface and Interface Science
- Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- China
| | - Jia-Long Kang
- Henan Provincial Key Laboratory of Surface and Interface Science
- Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- China
| | - Ai-Ling Wang
- Henan Provincial Key Laboratory of Surface and Interface Science
- Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- China
| | - Liming Zhou
- Henan Provincial Key Laboratory of Surface and Interface Science
- Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- China
| | - Shaoming Fang
- Henan Provincial Key Laboratory of Surface and Interface Science
- Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration
- Zhengzhou University of Light Industry
- Zhengzhou 450002
- China
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10
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Vollmer MV, Machan CW, Clark ML, Antholine WE, Agarwal J, Schaefer HF, Kubiak CP, Walensky JR. Synthesis, Spectroscopy, and Electrochemistry of (α-Diimine)M(CO) 3Br, M = Mn, Re, Complexes: Ligands Isoelectronic to Bipyridyl Show Differences in CO 2 Reduction. Organometallics 2014; 34:3-12. [PMID: 25892841 PMCID: PMC4399245 DOI: 10.1021/om500838z] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The synthesis and characterization of new Mn(I)- and Re(I)-centered organometallic complexes fashioned with 1,4-diazabutadiene (DAB) ligands is reported. Ten compounds of the type fac-(α-diimine)M(CO)3Br (M = Mn, Re) were obtained in moderate to excellent yield (35-80%) and high purity from the coordination of the five ligands with M(CO)5Br in refluxing ethanol. Despite the electronic similarity of DAB to 2,2'-bipyridyl, the complexes described herein were poor mediators of electrochemical CO2 conversion to CO, but provide insight into the role of redox-active ligands in catalysis. Additional characterization of the one-electron reduced rhenium compounds, relevant intermediates in CO2 reduction, by EPR and single-crystal X-ray analysis is described.
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Affiliation(s)
- Matthew V. Vollmer
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Charles W. Machan
- Department of Chemistry & Biochemistry, University of California, San Diego, California 92093, United States
| | - Melissa L. Clark
- Department of Chemistry & Biochemistry, University of California, San Diego, California 92093, United States
| | - William E. Antholine
- Department of Biophysics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, United States
| | - Jay Agarwal
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Henry F. Schaefer
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Clifford P. Kubiak
- Department of Chemistry & Biochemistry, University of California, San Diego, California 92093, United States
| | - Justin R. Walensky
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
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11
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Tao T, Qian HF, Huang W, You XZ. Tuning the Spectroscopic, Electrochemical, and Single-Crystal Conductance Properties of a Series of Rhenium-Containing Bithiazoles with Different Donor/Acceptor Hybrids. Organometallics 2014. [DOI: 10.1021/om500168j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tao Tao
- State
Key Laboratory of Coordination Chemistry, Nanjing National Laboratory
of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road 22, Nanjing 210093, People’s Republic of China
| | - Hui-Fen Qian
- State
Key Laboratory of Coordination Chemistry, Nanjing National Laboratory
of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road 22, Nanjing 210093, People’s Republic of China
- College
of Sciences, Nanjing Tech University, Nanjing 210009, People’s Republic of China
| | - Wei Huang
- State
Key Laboratory of Coordination Chemistry, Nanjing National Laboratory
of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road 22, Nanjing 210093, People’s Republic of China
| | - Xiao-Zeng You
- State
Key Laboratory of Coordination Chemistry, Nanjing National Laboratory
of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road 22, Nanjing 210093, People’s Republic of China
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12
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Hasheminasab A, Engle JT, Bass J, Herrick RS, Ziegler CJ. The Synthesis of Dimeric ReI-Phenylenediimine Conjugates: Spectroscopic and Electrochemical Studies. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201400076] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Chanawanno K, Engle JT, Le KX, Herrick RS, Ziegler CJ. The synthesis and pH-dependent behaviour of Re(CO)3 conjugates with diimine phenolic ligands. Dalton Trans 2013; 42:13679-84. [PMID: 23903568 PMCID: PMC4065860 DOI: 10.1039/c3dt50894c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this report we present a study of a series of Re(CO)3 pyridine-imine complexes with pendant phenol groups. We investigated the effects of the position of the phenol hydroxyl group (para, meta or ortho to the imine) on the steric and electronic characteristics of a series of Re(CO)3X(pyca-C6H4OH) compounds, where X = Cl, Br and pyca = pyridine-2-carbaldehyde imine. These compounds can be generated either via ligand synthesis followed by metal chelation (compound 4) or via a one-pot method (compounds 2, 3, 5 and 6). All six compounds show striking differences in pH-dependent UV-visible absorption based on the position of the phenol hydroxyl group.
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Affiliation(s)
- Kullapa Chanawanno
- Department of Chemistry, University of Akron, Akron, OH 44325-3601, USAFax: +1-330-972-7370; Tel: +1-330-972-2531
| | - James T. Engle
- Department of Chemistry, University of Akron, Akron, OH 44325-3601, USAFax: +1-330-972-7370; Tel: +1-330-972-2531
| | - Kevin X. Le
- Department of Chemistry, College of the Holy Cross, Worcester, MA01610, USA.Fax: +1-508-793-3530; Tel: +1-508-793-2490
| | - Richard S. Herrick
- Department of Chemistry, College of the Holy Cross, Worcester, MA01610, USA.Fax: +1-508-793-3530; Tel: +1-508-793-2490
| | - Christopher J. Ziegler
- Department of Chemistry, University of Akron, Akron, OH 44325-3601, USAFax: +1-330-972-7370; Tel: +1-330-972-2531
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Costa R, Chanawanno K, Engle JT, Baroody B, Herrick RS, Ziegler CJ. The synthesis of biologically relevant conjugates of Re(CO) 3 using pyridine-2-carboxyaldehyde. J Organomet Chem 2013; 734:25-31. [PMID: 23976791 DOI: 10.1016/j.jorganchem.2012.10.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The new pyridine-2-carboxaldehyde adduct, Re(CO)3(NC6H5C(O)H)Cl 1, and previously reported complex Re(CO)3(NC6H5C(O)H)Br 2 react with aniline derivatives sulfanilamide or 4-aminofluorescein in methanol giving Schiff base conjugates Re(CO)3(pyca-R)X (pyca = pyridinecarbaldehyde imine, X = Cl, Br), 3-6. Pre-isolation of compounds 1 and 2 provides a convenient method for preparing conjugate complexes in addition to the known methods of ligand synthesis and one-pot reactions. All new compounds were completely characterized, and compound 1 and the sulfanilamide derivatives 3 and 4 were structurally elucidated by X-ray crystallography.
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Affiliation(s)
- Roshinee Costa
- Department of Chemistry, University of Akron, Akron, OH 44325-3601, USA
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15
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Álvarez CM, García-Escudero LA, García-Rodríguez R, Miguel D. Schiff plus click: one-pot preparation of triazole-substituted iminopyridines and ring opening of the triazole ring. Dalton Trans 2013; 42:2556-61. [DOI: 10.1039/c2dt32400h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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16
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Quantum chemical study on first hyperpolarizabilities of mono- and bimetal Pt(II) diimine complexes. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Yi X, Zhao J, Wu W, Huang D, Ji S, Sun J. Rhenium(i) tricarbonyl polypyridine complexes showing strong absorption of visible light and long-lived triplet excited states as a triplet photosensitizer for triplet–triplet annihilation upconversion. Dalton Trans 2012; 41:8931-40. [DOI: 10.1039/c2dt30804e] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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