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Sarkar RS, Basak T, Gomila RM, Frontera A, Chattopadhyay S. DFT study on CH⋯O, CH···SCN and S···π interaction energies in three dinuclear mixed valence cobalt(III/II) complexes with secondary diamine ligands having inner N2O2 and outer O4 compartments. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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2
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Banerjee A, Gómez García CJ, Benmansour S, Gomlia RM, Frontera A, Chattopadhyay S. Field-induced single-molecule magnet behaviour in a series of dinuclear cobalt(III,II) complexes. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Carlton ES, Sutton JJ, Gale AG, Shields GC, Gordon KC, Wagenknecht PS. Insights into the charge-transfer character of electronic transitions in RCp 2Ti(C 2Fc) 2 complexes using solvatochromism, resonance Raman spectroscopy, and TDDFT. Dalton Trans 2021; 50:2233-2242. [PMID: 33502417 DOI: 10.1039/d0dt04282j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of complexes with low-energy FeII to TiIV metal-to-metal charge-transfer (MMCT) transitions, Cp2Ti(C2Fc)2, Cp*2Ti(C2Fc)2, and MeOOCCp2Ti(C2Fc)2, was investigated using solvatochromism and resonance Raman spectroscopy (RRS) augmented with time-dependent density functional theory (TDDFT) calculations in order to interrogate the nature of the CT transitions. Computational models were benchmarked against the experimental UV-Vis spectra and B3LYP/6-31G(d) was found to most faithfully represent the spectra. The energy of the MMCT transition was measured in 15 different solvents and a multivariate fit to the Catalán solvent parameters - solvent polarizability (SP), solvent dipolarity (SdP), solvent basicity (SB), and solvent acidity (SA) - was performed. The effect of SP indicates a greater degree of electron delocalization in the excited state (ES) than the ground state (GS). The small negative solvatochromism with respect to SdP indicates a smaller dipole moment in the ES than the GS. The effect of SB is consistent with charge-transfer to Ti. Upon excitation into the MMCT absorption band, the RRS data show enhancement of the alkyne stretching modes and of the out-of-plane bending modes of the cyclopentadienyl ring connected to Fe and the alkyne bridge. This is consistent with changes in the oxidation states of Ti and Fe, respectively. The higher-energy transitions (350-450 nm) show enhancement of vibrational modes consistent with ethnylcyclopentadienyl to Ti ligand-to-metal charge transfer (LMCT). The RRS data is consistent with the TDDFT predicted character of these transitions. TDDFT suggests that the lowest-energy transition in Cp2Ti(C2Fc)2CuI, where CuI is coordinated between the alkynes, retains its FeII to TiIV MMCT character, in agreement with the RRS data, but that the lowest-energy transitions have significant CuI to Ti character. For Cp2Ti(C2Fc)2CuI, excitation into the low-energy MMCT absorption band results in selective enhancement of the symmetric alkynyl stretching mode.
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Affiliation(s)
| | - Joshua J Sutton
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand
| | - Ariel G Gale
- Department of Chemistry, Furman University, Greenville, SC 29613, USA.
| | - George C Shields
- Department of Chemistry, Furman University, Greenville, SC 29613, USA.
| | - Keith C Gordon
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand
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4
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Banerjee A, Das D, Ray PP, Banerjee S, Chattopadhyay S. Phenoxo-bridged dinuclear mixed valence cobalt(III/II) complexes with reduced Schiff base ligands: synthesis, characterization, band gap measurements and fabrication of Schottky barrier diodes. Dalton Trans 2021; 50:1721-1732. [PMID: 33448276 DOI: 10.1039/d0dt03707a] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Two homometallic class-I dinuclear mixed valence cobalt complexes, [(N3)CoIIIL1(μ-C6H4(NO2)CO2)CoII(N3)] (1) and [(N3)CoIIIL2(μ-C6H4(NO2)CO2)CoII(N3)] (2), have been synthesized using multisite N2O4 coordination ligands, H2L1 {where H2L1 = (2,2-dimethyl-1,3-propanediyl)bis(iminomethylene)bis(6-methoxyphenol) and H2L2 = (2,2-dimethyl-1,3-propanediyl)bis(iminomethylene)bis(6-ethoxyphenol)}. Each complex has been structurally characterized by single crystal X-ray diffraction and spectral analysis. Both the cobalt centers in these dinuclear complexes adopt a distorted-octahedral geometry, where the cobalt(iii) center resides at the inner N2O2 cavity and the cobalt(ii) center resides at the outer O4 cavity of the reduced Schiff base. Both of them show good electrical conductivity, which has been rationalized by band gap measurements. The band gap in the solid state has been determined by experimental and DFT calculations and it confirms that each of the two complexes behaves as a semiconductor. The space-charge-limited current (SCLC) theory is employed to evaluate the charge transport parameters such as effective carrier mobility and transit time for both complexes. The difference in the conductivity values of the complexes may be correlated with the strengths of extended supramolecular interactions in the complexes. Bader's quantum theory of atoms-in-molecules (QTAIM) is applied extensively to get quantitative and qualitative insights into the physical nature of weak non-covalent interactions. In addition, the non-covalent interaction reduced density gradient (NCI-RDG) methods well support the presence of such non-covalent intermolecular interactions.
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Affiliation(s)
- Abhisek Banerjee
- Department of Chemistry, Inorganic Section, Jadavpur University, Kolkata-700032, India.
| | - Dhananjoy Das
- Department of Physics, Jadavpur University, Kolkata-700032, India.
| | | | - Snehasis Banerjee
- Govt. College of Engineering and Leather Technology, Salt Lake Sector-III, Block-LB, Kolkata 700106, India
| | - Shouvik Chattopadhyay
- Department of Chemistry, Inorganic Section, Jadavpur University, Kolkata-700032, India.
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5
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Nadurata VL, Boskovic C. Switching metal complexes via intramolecular electron transfer: connections with solvatochromism. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01490g] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Solvent-induced color-changing phenomena exhibited by some metal complexes can illuminate key aspects of their switchable behavior.
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6
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Banerjee A, Herrero S, Gutiérrez Á, Chattopadhyay S. Synthesis, structure and magnetic property of a dinuclear cobalt(II/III) complex with a reduced Schiff base ligand. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114756] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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7
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Banerjee A, Chattopadhyay S. A benzoate bridged dinuclear mixed valence cobalt(III/II) complex with CoIIIO4CoII core: Synthesis, structure and investigation of its phenoxazinone synthase mimicking activity. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114290] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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8
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Hassenrück C, Mang A, Winter RF. Mixed-Valent Ruthenocene–Vinylruthenium Conjugates: Valence Delocalization Despite Chemically Different Redox Sites. Inorg Chem 2019; 58:2695-2707. [DOI: 10.1021/acs.inorgchem.8b03253] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christopher Hassenrück
- University of Konstanz, Department of Chemistry, Universitätsstraße 10, 78457 Konstanz, Germany
| | - André Mang
- University of Konstanz, Department of Chemistry, Universitätsstraße 10, 78457 Konstanz, Germany
| | - Rainer F. Winter
- University of Konstanz, Department of Chemistry, Universitätsstraße 10, 78457 Konstanz, Germany
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9
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Lauck M, Förster C, Heinze K. N-Cobaltocenium Amide as Reactive Nucleophilic Reagent for Donor–Acceptor Bimetallocenes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00790] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Maximilian Lauck
- Institute of Inorganic Chemistry and
Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Christoph Förster
- Institute of Inorganic Chemistry and
Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Katja Heinze
- Institute of Inorganic Chemistry and
Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
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10
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Rossi S, Bisello A, Cardena R, Orian L, Santi S. Benzodithiophene and Benzotrithiophene as π Cores for Two- and Three-Blade Propeller-Shaped Ferrocenyl-Based Conjugated Systems. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Serena Rossi
- Department of Chemical Sciences; University of Padova; Via Marzolo 1 35131 Padova Italy
| | - Annalisa Bisello
- Department of Chemical Sciences; University of Padova; Via Marzolo 1 35131 Padova Italy
| | - Roberta Cardena
- Department of Chemical Sciences; University of Padova; Via Marzolo 1 35131 Padova Italy
| | - Laura Orian
- Department of Chemical Sciences; University of Padova; Via Marzolo 1 35131 Padova Italy
| | - Saverio Santi
- Department of Chemical Sciences; University of Padova; Via Marzolo 1 35131 Padova Italy
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11
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Lauck M, Förster C, Gehrig D, Heinze K. Cobaltocenium substituents as electron acceptors in photosynthetic model dyads. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.02.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Synthesis, characterization, and crystal structures of molybdenum complexes of unsymmetrical electron-poor dithiolene ligands. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.04.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Gäbler C, Speck JM, Korb M, Schaarschmidt D, Lang H. (Ferrocenylthienyl)phosphines: Synthesis, electrochemistry and their use in Suzuki-Miyaura C,C coupling. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.03.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Turlington MD, Pienkos JA, Carlton ES, Wroblewski KN, Myers AR, Trindle CO, Altun Z, Rack JJ, Wagenknecht PS. Complexes with Tunable Intramolecular Ferrocene to Ti(IV) Electronic Transitions: Models for Solid State Fe(II) to Ti(IV) Charge Transfer. Inorg Chem 2016; 55:2200-11. [PMID: 26881903 DOI: 10.1021/acs.inorgchem.5b02587] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Iron(II)-to-titanium(IV) metal-to-metal-charge transfer (MMCT) is important in the photosensitization of TiO2 by ferrocyanide, charge transfer in solid-state metal-oxide photocatalysts, and has been invoked to explain the blue color of sapphire, blue kyanite, and some lunar material. Herein, a series of complexes with alkynyl linkages between ferrocene (Fc) and Ti(IV) has been prepared and characterized by UV-vis spectroscopy and electrochemistry. Complexes with two ferrocene substituents include Cp2Ti(C2Fc)2, Cp*2Ti(C2Fc)2, and Cp2Ti(C4Fc)2. Complexes with a single ferrocene utilize a titanocene with a trimethylsilyl derivatized Cp ring, (TMS)Cp, and comprise the complexes (TMS)Cp2Ti(C2Fc)(C2R), where R = C6H5, p-C6H4CF3, and CF3. The complexes are compared to Cp2Ti(C2Ph)2, which lacks the second metal. Cyclic voltammetry for all complexes reveals a reversible Ti(IV/III) reduction wave and an Fe(II/III) oxidation that is irreversible for all complexes except (TMS)Cp2Ti(C2Fc)(C2CF3). All of the complexes with both Fc and Ti show an intense absorption (4000 M(-1)cm(-1) < ε < 8000 M(-1)cm(-1)) between 540 and 630 nm that is absent in complexes lacking a ferrocene donor. The energy of the absorption tracks with the difference between the Ti(IV/III) and Fe(III/II) reduction potentials, shifting to lower energy as the difference in potentials decreases. Reorganization energies, λ, have been determined using band shape analysis (2600 cm(-1) < λ < 5300 cm(-1)) and are in the range observed for other donor-acceptor complexes that have a ferrocene donor. Marcus-Hush-type analysis of the electrochemical and spectroscopic data are consistent with the assignment of the low-energy absorption as a MMCT band. TD-DFT analysis also supports this assignment. Solvatochromism is apparent for the MMCT band of all complexes, there being a bathochromic shift upon increasing polarizability of the solvent. The magnitude of the shift is dependent on both the electron density at Ti(IV) and the identity of the linker between the titanocene and the Fc. Complexes with a MMCT are photochemically stable, whereas Cp2Ti(C2Ph)2 rapidly decomposes upon photolysis.
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Affiliation(s)
- Michael D Turlington
- Department of Chemistry, Furman University , Greenville, South Carolina 29613, United States
| | - Jared A Pienkos
- Department of Chemistry, Furman University , Greenville, South Carolina 29613, United States
| | - Elizabeth S Carlton
- Department of Chemistry, Furman University , Greenville, South Carolina 29613, United States
| | - Karlee N Wroblewski
- Department of Chemistry, Furman University , Greenville, South Carolina 29613, United States
| | - Alexis R Myers
- Department of Chemistry, Furman University , Greenville, South Carolina 29613, United States
| | - Carl O Trindle
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Zikri Altun
- Department of Physics, Marmara University Göztepe Kampus , 34772 Istanbul Turkey
| | - Jeffrey J Rack
- Department of Chemistry and Chemical Biology, University of New Mexico , Albuquerque, New Mexico 87131, United States
| | - Paul S Wagenknecht
- Department of Chemistry, Furman University , Greenville, South Carolina 29613, United States
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15
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Roemer M, Skelton BW, Piggott MJ, Koutsantonis GA. 1,1′-Diacetyloctamethylferrocene: an overlooked and overdue synthon leading to the facile synthesis of an octamethylferrocenophane. Dalton Trans 2016; 45:18817-18821. [DOI: 10.1039/c6dt03820d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Surprisingly easy access to versatile synthons: high yielding acylation, chloroformylation and intramolecular cyclisation reaction to a ferrocenophane.
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Affiliation(s)
- Max Roemer
- Chemistry
- M310
- School of Chemistry and Biochemistry
- The University of Western Australia
- Crawley
| | - Brian W. Skelton
- Centre for Microscopy
- Characterisation and Analysis
- University of Western Australia
- Crawley
- Australia
| | - Matthew J. Piggott
- Chemistry
- M310
- School of Chemistry and Biochemistry
- The University of Western Australia
- Crawley
| | - George A. Koutsantonis
- Chemistry
- M310
- School of Chemistry and Biochemistry
- The University of Western Australia
- Crawley
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16
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Donoli A, Bisello A, Cardena R, Crisma M, Orian L, Santi S. Charge Transfer Properties of Benzo[b]thiophene Ferrocenyl Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00191] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alessandro Donoli
- Department
of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Annalisa Bisello
- Department
of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Roberta Cardena
- Department
of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Marco Crisma
- Institute
of Biomolecular Chemistry, Padova Unit, CNR, via Marzolo 1, 35131 Padova, Italy
| | - Laura Orian
- Department
of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Saverio Santi
- Department
of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
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17
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Sun MJ, Shao JY, Yao CJ, Zhong YW, Yao J. Osmium Bisterpyridine Complexes with Redox-Active Amine Substituents: A Comparison Study with Ruthenium Analogues. Inorg Chem 2015; 54:8136-47. [DOI: 10.1021/acs.inorgchem.5b01420] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Meng-Jia Sun
- 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
| | - Chang-Jiang Yao
- 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
| | - Jiannian Yao
- 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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Speck JM, Korb M, Schade A, Spange S, Lang H. Ferrocenes Bridged by Ethylenediamino Thiophene: Varying Charge Transfer Properties in a Series of 3,4-Di-N-substituted 2,5-Diferrocenyl Thiophenes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00450] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Matthäus Speck
- Technische Universität Chemnitz, Fakultät
für Naturwissenschaften, Institut für Chemie, Anorganische
Chemie, D-09107 Chemnitz, Germany
| | - Marcus Korb
- Technische Universität Chemnitz, Fakultät
für Naturwissenschaften, Institut für Chemie, Anorganische
Chemie, D-09107 Chemnitz, Germany
| | - Alexander Schade
- Technische Universität Chemnitz, Fakultät
für Naturwissenschaften, Institut für Chemie, Polymerchemie, D-09107 Chemnitz, Germany
| | - Stefan Spange
- Technische Universität Chemnitz, Fakultät
für Naturwissenschaften, Institut für Chemie, Polymerchemie, D-09107 Chemnitz, Germany
| | - Heinrich Lang
- Technische Universität Chemnitz, Fakultät
für Naturwissenschaften, Institut für Chemie, Anorganische
Chemie, D-09107 Chemnitz, Germany
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20
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Santi S, Bisello A, Cardena R, Donoli A. Key multi(ferrocenyl) complexes in the interplay between electronic coupling and electrostatic interaction. Dalton Trans 2015; 44:5234-57. [DOI: 10.1039/c4dt03581j] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this review, the properties of the most significant examples of multi(ferrocenyl) cations containing a number of ferrocenyl units from two to six are discussed and the results are compared with the outcomes of some of our recent studies on conjugated ferrocenyl complexes.
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Affiliation(s)
- Saverio Santi
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Annalisa Bisello
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Roberta Cardena
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
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21
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van der Westhuizen B, Matthäus Speck J, Korb M, Bezuidenhout DI, Lang H. (Spectro)electrochemical investigations on (ferrocenyl)thiophenes modified by tungsten Fischer carbenes. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.08.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Mohapatra SK, Fonari A, Risko C, Yesudas K, Moudgil K, Delcamp JH, Timofeeva TV, Brédas JL, Marder SR, Barlow S. Dimers of Nineteen-Electron Sandwich Compounds: Crystal and Electronic Structures, and Comparison of Reducing Strengths. Chemistry 2014; 20:15385-94. [DOI: 10.1002/chem.201404007] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Indexed: 11/11/2022]
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23
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Donoli A, Bisello A, Cardena R, Prinzivalli C, Crisma M, Santi S. Charge Transfer Properties in Cyclopenta[l]phenanthrene Ferrocenyl Complexes. Organometallics 2014. [DOI: 10.1021/om4009668] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Alessandro Donoli
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Annalisa Bisello
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Roberta Cardena
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Cristina Prinzivalli
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Marco Crisma
- Institute of Biomolecular Chemistry, Padova Unit, CNR, via Marzolo
1, 35131 Padova, Italy
| | - Saverio Santi
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
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24
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Goetsch WR, Solntsev PV, Van Stappen C, Purchel AA, Dudkin SV, Nemykin VN. Electron-Transfer Processes in 3,4-Diferrocenylpyrroles: Insight into a Missing Piece of the Polyferrocenyl-Containing Pyrroles Family. Organometallics 2013. [DOI: 10.1021/om400901w] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Wil R. Goetsch
- Department of Chemistry and
Biochemistry, University of Minnesota Duluth, 1039 University Drive, Duluth, Minnesota 55812, United States
| | - Pavlo V. Solntsev
- Department of Chemistry and
Biochemistry, University of Minnesota Duluth, 1039 University Drive, Duluth, Minnesota 55812, United States
| | - Casey Van Stappen
- Department of Chemistry and
Biochemistry, University of Minnesota Duluth, 1039 University Drive, Duluth, Minnesota 55812, United States
| | - Anatolii A. Purchel
- Department of Chemistry and
Biochemistry, University of Minnesota Duluth, 1039 University Drive, Duluth, Minnesota 55812, United States
| | - Semen V. Dudkin
- Department of Chemistry and
Biochemistry, University of Minnesota Duluth, 1039 University Drive, Duluth, Minnesota 55812, United States
| | - Victor N. Nemykin
- Department of Chemistry and
Biochemistry, University of Minnesota Duluth, 1039 University Drive, Duluth, Minnesota 55812, United States
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25
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Polit W, Mücke P, Wuttke E, Exner T, Winter RF. Charge and Spin Confinement to the Amine Site in 3-Connected Triarylamine Vinyl Ruthenium Conjugates. Organometallics 2013. [DOI: 10.1021/om4007455] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Walther Polit
- Fachbereich
Chemie, Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Philipp Mücke
- Fachbereich
Chemie, Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Evelyn Wuttke
- Fachbereich
Chemie, Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Thomas Exner
- Pharmazeutisches
Institut, Eberhard-Karls Universität Tübingen, Auf
der Morgenstelle 8, D-72076 Tübingen, Germany
| | - Rainer F. Winter
- Fachbereich
Chemie, Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany
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26
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Shah HH, Al-Balushi RA, Al-Suti MK, Khan MS, Woodall CH, Molloy KC, Raithby PR, Robinson TP, Dale SEC, Marken F. Long-Range Intramolecular Electronic Communication in Bis(ferrocenylethynyl) Complexes Incorporating Conjugated Heterocyclic Spacers: Synthesis, Crystallography, and Electrochemistry. Inorg Chem 2013; 52:4898-908. [DOI: 10.1021/ic3024887] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hakikulla H. Shah
- Department of Chemistry, Sultan Qaboos University, P.O. Box 36, Al-Khodh 123, Sultanate
of Oman
| | - Rayya A. Al-Balushi
- Department of Chemistry, Sultan Qaboos University, P.O. Box 36, Al-Khodh 123, Sultanate
of Oman
| | - Mohammed K. Al-Suti
- Department of Chemistry, Sultan Qaboos University, P.O. Box 36, Al-Khodh 123, Sultanate
of Oman
| | - Muhammad S. Khan
- Department of Chemistry, Sultan Qaboos University, P.O. Box 36, Al-Khodh 123, Sultanate
of Oman
| | | | | | - Paul R. Raithby
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K
| | | | - Sara E. C. Dale
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K
| | - Frank Marken
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K
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27
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Donoli A, Bisello A, Cardena R, Prinzivalli C, Santi S. Charge Transfer Properties of Multi(ferrocenyl)trindenes. Organometallics 2013. [DOI: 10.1021/om301006v] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Alessandro Donoli
- Dipartimento di
Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Annalisa Bisello
- Dipartimento di
Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Roberta Cardena
- Dipartimento di
Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Cristina Prinzivalli
- Dipartimento di
Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Saverio Santi
- Dipartimento di
Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
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28
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Pfaff U, Hildebrandt A, Schaarschmidt D, Hahn T, Liebing S, Kortus J, Lang H. Di- and Triferrocenyl (Hetero)Aromatics: Synthesis, Characterization, (Spectro-)Electrochemistry, and Calculations. Organometallics 2012. [DOI: 10.1021/om300511v] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ulrike Pfaff
- Department of Inorganic Chemistry,
Institute of Chemistry, Faculty of Natural Sciences, Chemnitz University of Technology, Straße der
Nationen 62, D-09111 Chemnitz, Germany
| | - Alexander Hildebrandt
- Department of Inorganic Chemistry,
Institute of Chemistry, Faculty of Natural Sciences, Chemnitz University of Technology, Straße der
Nationen 62, D-09111 Chemnitz, Germany
| | - Dieter Schaarschmidt
- Department of Inorganic Chemistry,
Institute of Chemistry, Faculty of Natural Sciences, Chemnitz University of Technology, Straße der
Nationen 62, D-09111 Chemnitz, Germany
| | - Torsten Hahn
- Institut of Theoretical Physics, Technische Universität Bergakademie Freiberg, Leipziger
Straße 23, 09596 Freiberg, Germany
| | - Simon Liebing
- Institut of Theoretical Physics, Technische Universität Bergakademie Freiberg, Leipziger
Straße 23, 09596 Freiberg, Germany
| | - Jens Kortus
- Institut of Theoretical Physics, Technische Universität Bergakademie Freiberg, Leipziger
Straße 23, 09596 Freiberg, Germany
| | - Heinrich Lang
- Department of Inorganic Chemistry,
Institute of Chemistry, Faculty of Natural Sciences, Chemnitz University of Technology, Straße der
Nationen 62, D-09111 Chemnitz, Germany
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29
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Speck JM, Claus R, Hildebrandt A, Rüffer T, Erasmus E, van As L, Swarts JC, Lang H. Electron Transfer Studies on Ferrocenylthiophenes: Synthesis, Properties, and Electrochemistry. Organometallics 2012. [DOI: 10.1021/om3006036] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. Matthäus Speck
- Fakultät für Naturwissenschaften,
Institut für Chemie, Lehrstuhl
für Anorganische Chemie, Technische Universität Chemnitz, Straße der Nationen
62, 09111 Chemnitz, Germany
| | - Ron Claus
- Fakultät für Naturwissenschaften,
Institut für Chemie, Lehrstuhl
für Anorganische Chemie, Technische Universität Chemnitz, Straße der Nationen
62, 09111 Chemnitz, Germany
| | - Alexander Hildebrandt
- Fakultät für Naturwissenschaften,
Institut für Chemie, Lehrstuhl
für Anorganische Chemie, Technische Universität Chemnitz, Straße der Nationen
62, 09111 Chemnitz, Germany
| | - Tobias Rüffer
- Fakultät für Naturwissenschaften,
Institut für Chemie, Lehrstuhl
für Anorganische Chemie, Technische Universität Chemnitz, Straße der Nationen
62, 09111 Chemnitz, Germany
| | - Elizabeth Erasmus
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein,
South Africa
| | - Lydia van As
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein,
South Africa
| | - Jannie C. Swarts
- Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein,
South Africa
| | - Heinrich Lang
- Fakultät für Naturwissenschaften,
Institut für Chemie, Lehrstuhl
für Anorganische Chemie, Technische Universität Chemnitz, Straße der Nationen
62, 09111 Chemnitz, Germany
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30
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Sabin JR, Varzatskii OA, Voloshin YZ, Starikova ZA, Novikov VV, Nemykin VN. Insight into the electronic structure, optical properties, and redox behavior of the hybrid phthalocyaninoclathrochelates from experimental and density functional theory approaches. Inorg Chem 2012; 51:8362-72. [PMID: 22800298 DOI: 10.1021/ic3008798] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An insight into the electronic structure of several hafnium(IV), zirconium(IV), and lutetium(III) phthalocyaninoclathrochelates has been discussed on the basis of experimental UV-vis, MCD, electro- and spectroelectrochemical data as well as density functional theory (DFT) and time-dependent DFT (TDDFT) calculations. On the basis of UV-vis and MCD spectroscopy as well as theoretical predictions, it was concluded that the electronic structure of the phthalocyninoclathrochelates can be described in the first approximation as a superposition of the weakly interacting phthalocyanine and clathrochelate substituents. Spectroelectrochemical data and DFT calculations clearly confirm that the highest occupied molecular orbital (HOMO) in all tested complexes is localized on the phthalocyanine ligand. X-ray crystallography on zirconium(IV) and earlier reported hafnium(IV) phthalocyaninoclathrochelate complexes revealed a slightly distorted phthalocyanine conformation with seven-coordinated metal center positioned ∼1 Å above macrocyclic cavity. The geometry of the encapsulated iron(II) ion in the clathrochelate fragment was found to be between trigonal-prismatic and trigonal-antiprismatic.
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Affiliation(s)
- Jared R Sabin
- Department of Chemistry & Biochemistry, 1039 University Drive, University of Minnesota Duluth, Duluth, Minnesota 55812, United States
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31
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Mohapatra SK, Romanov A, Angles G, Timofeeva TV, Barlow S, Marder SR. Synthesis and characterization of nonamethylrhodocenium and iridocenium hexafluorophosphate salts. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.01.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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32
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Speck JM, Schaarschmidt D, Lang H. Atropisomeric 3,3′,4,4′,5,5′-Hexaferrocenyl-2,2′-bithiophene: Synthesis, Solid-State Structure, and Electrochemistry. Organometallics 2012. [DOI: 10.1021/om201266y] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Matthäus Speck
- Fakultät
für Naturwissenschaften, Institut
für Chemie, Lehrstuhl für Anorganische Chemie, Technische Universität Chemnitz, Straße
der Nationen 62, 09111 Chemnitz, Germany
| | - Dieter Schaarschmidt
- Fakultät
für Naturwissenschaften, Institut
für Chemie, Lehrstuhl für Anorganische Chemie, Technische Universität Chemnitz, Straße
der Nationen 62, 09111 Chemnitz, Germany
| | - Heinrich Lang
- Fakultät
für Naturwissenschaften, Institut
für Chemie, Lehrstuhl für Anorganische Chemie, Technische Universität Chemnitz, Straße
der Nationen 62, 09111 Chemnitz, Germany
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33
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Huesmann H, Förster C, Siebler D, Gasi T, Heinze K. Amide-Linked Heterobi- and Heterotermetallocenes with Very Low HOMO–LUMO Gaps. Organometallics 2011. [DOI: 10.1021/om201007g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hannah Huesmann
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Christoph Förster
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Daniel Siebler
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Teuta Gasi
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Staudingerweg 9, 55128 Mainz, Germany
| | - Katja Heinze
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
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34
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Solntsev PV, Dudkin SV, Sabin JR, Nemykin VN. Electronic Communications in (Z)-Bis(ferrocenyl)ethylenes with Electron-Withdrawing Substituents. Organometallics 2011. [DOI: 10.1021/om2001266] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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35
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Rohde GT, Sabin JR, Barrett CD, Nemykin VN. Long-range metal–metal coupling in transition-metal 5,10,15,20-tetraferrocenylporphyrins. NEW J CHEM 2011. [DOI: 10.1039/c1nj20145j] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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36
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Aguirre-Etcheverry P, Ashley AE, Balázs G, Green JC, Cowley AR, Thompson AL, O’Hare D. Synthesis, Structure, and Ligand Exchange Reactions of Tetramethyleneethane Complexes of Cobalt. Organometallics 2010. [DOI: 10.1021/om100611p] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paulina Aguirre-Etcheverry
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Andrew E. Ashley
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Gábor Balázs
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Jennifer C. Green
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Andrew R. Cowley
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Amber L. Thompson
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
| | - Dermot O’Hare
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K
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37
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Nemykin VN, Hadt RG. Interpretation of the UV−vis Spectra of the meso(Ferrocenyl)-Containing Porphyrins using a TDDFT Approach: Is Gouterman’s Classic Four-Orbital Model Still in Play? J Phys Chem A 2010; 114:12062-6. [DOI: 10.1021/jp1083828] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Victor N. Nemykin
- Department of Chemistry and Biochemistry, University of Minnesota—Duluth, Duluth, Minnesota 55812, United States
| | - Ryan G. Hadt
- Department of Chemistry and Biochemistry, University of Minnesota—Duluth, Duluth, Minnesota 55812, United States
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38
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Nemykin VN, Rohde GT, Barrett CD, Hadt RG, Sabin JR, Reina G, Galloni P, Floris B. Long-Range Electronic Communication in Free-Base meso-Poly(Ferrocenyl)-Containing Porphyrins. Inorg Chem 2010; 49:7497-509. [DOI: 10.1021/ic101012a] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Victor N. Nemykin
- Department of Chemistry & Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812
| | - Gregory T. Rohde
- Department of Chemistry & Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812
| | - Christopher D. Barrett
- Department of Chemistry & Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812
| | - Ryan G. Hadt
- Department of Chemistry & Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812
| | - Jared R. Sabin
- Department of Chemistry & Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812
| | - Giacomo Reina
- Department of Chemistry & Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma “Tor Vergata”, via della ricerca scientifica, 00133 Rome, Italy
| | - Pierluca Galloni
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma “Tor Vergata”, via della ricerca scientifica, 00133 Rome, Italy
| | - Barbara Floris
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma “Tor Vergata”, via della ricerca scientifica, 00133 Rome, Italy
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39
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Muñoz-Castro A, Mac-Leod Carey D, Arratia-Pérez R. Spin-orbit effects on electronic delocalization. Aromaticity in a discrete square tetrapalladium sandwich complex. J Chem Phys 2010; 132:164308. [PMID: 20441276 DOI: 10.1063/1.3382340] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this article, we report the relativistic electronic structure, including spin-orbit interaction, employing all-electron density functional theory calculations on the multimetallic sandwich compound [(CNT)Pd(4)(COT)](1+) (1), which can be considered as a [Pd(4)](2+) fragment flanked by two ring-ligands, namely, cyclononatetraenyl (CNT(1-)) and cyclooctatetraene (COT), as well as the dimer of 1, hereafter 2. The calculations suggest that the Pd(4)-ligand interaction is mainly electrostatic, being the main responsible term for the stabilization of the almost fully occupied 4d shell [Pd(4)](2+) fragment. The ring currents and electronic delocalization estimated via the nuclear independent chemical shifts indices and electron localization function, allow us to describe a significant sigma-aromaticity at the center of the Pd(4) square in 1, which in conjunction with the aromaticity arising from the ligands induce considerable aromatic character inside of the multimetallic metallocene.
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Affiliation(s)
- A Muñoz-Castro
- Departamento de Ciencias Quimicas, Relativistic Molecular Physics Group, Universidad Andres Bello, Republica 275, Santiago, Chile
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40
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Muñoz-Castro A, Mac-Leod Carey D, Morales-Verdejo C, Chávez I, Manríquez JM, Arratia-Pérez R. Toward the Synthetic Control of the HOMO−LUMO Gap in Binuclear Systems: Insights from Density Functional Calculations. Inorg Chem 2010; 49:4175-8. [DOI: 10.1021/ic902326y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alvaro Muñoz-Castro
- Departamento de Ciencias Quimicas, Universidad Andres Bello, Republica 275, Santiago, Chile
| | - Desmond Mac-Leod Carey
- Departamento de Ciencias Quimicas, Universidad Andres Bello, Republica 275, Santiago, Chile
| | - Cesar Morales-Verdejo
- Departamento de Quimica Inorganica, Facultad de Quimica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago, Chile
| | - Ivonne Chávez
- Departamento de Quimica Inorganica, Facultad de Quimica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago, Chile
| | - Juan Manuel Manríquez
- Departamento de Quimica Inorganica, Facultad de Quimica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago, Chile
| | - Ramiro Arratia-Pérez
- Departamento de Ciencias Quimicas, Universidad Andres Bello, Republica 275, Santiago, Chile
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41
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Muñoz-Castro A, Arratia-Pérez R. Electronic Delocalization, Energetics, and Optical Properties of Tripalladium Ditropylium Halides, [Pd3(C7H7)2X3]1− (X = Cl−, Br−, and I−). J Phys Chem A 2010; 114:5217-21. [DOI: 10.1021/jp101038u] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Muñoz-Castro
- Departamento de Ciencias Quimicas, Relativistic Molecular Physics (ReMoPh) group, Universidad Andres Bello, Republica 275, Santiago, Chile
| | - R. Arratia-Pérez
- Departamento de Ciencias Quimicas, Relativistic Molecular Physics (ReMoPh) group, Universidad Andres Bello, Republica 275, Santiago, Chile
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42
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Nemykin VN, Rohde GT, Barrett CD, Hadt RG, Bizzarri C, Galloni P, Floris B, Nowik I, Herber RH, Marrani AG, Zanoni R, Loim NM. Electron-transfer processes in metal-free tetraferrocenylporphyrin. Understanding internal interactions to access mixed-valence States potentially useful for quantum cellular automata. J Am Chem Soc 2010; 131:14969-78. [PMID: 19772340 DOI: 10.1021/ja905310h] [Citation(s) in RCA: 138] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Redox properties of H(2)TFcP [TFcP(2-) = 5,10,15,20-tetraferrocenylporphyrin(2-)] were investigated using cyclic voltammetry, differential pulse voltammetry, and square-wave voltammetry methods in a large variety of solvents and electrolytes. When DMF, THF, and MeCN were used with TBAP as the supporting electrolyte, the first oxidation wave was assigned to a single four-electron oxidation process reflecting simultaneous oxidation of all iron(II) centers into iron(III) centers in H(2)TFcP. When an o-DCB (1,2-dichlorobenzene)/TBAP combination was used in electrochemical experiments, four ferrocene substituents underwent two very diffuse, "two-electron" stepwise oxidations. The use of a weakly coordinating TFAB ([NBu(4)][B(C(6)F(5))(4)]) electrolyte in o-DCB or DCM results in four single-electron oxidation processes for ferrocene substituents in which the first and second single-electron waves have a relatively large separation, while the second, third, and fourth oxidation processes are more closely spaced; similar results were observed when a DCM/TBAP system and an imidazolium cation-based ionic liquid ((bmim)Tf(2)N = N-butyl-N'-methylimidazolium bis(trifluoromethanesulfonyl)imide) were used. Spectroelectrochemical oxidation of H(2)TFcP in o-DCB or DCM with TFAB as the supporting electrolyte allowed for characterization of the mixed-valence [H(2)TFcP](+), [H(2)TFcP](2+), and [H(2)TFcP](3+) compounds by UV-vis spectroscopy in addition to the "all-Fe(III)" [H(2)TFcP](4+). The chemical oxidation of H(2)TFcP was tested using a variety of oxidants which resulted in formation of mixed-valence [H(2)TFcP](+) and [H(2)TFcP](2+) as well as [H(2)TFcP](4+), which were characterized by UV-vis-NIR, MCD, IR, Mossbauer, and XPS spectroscopy. The intervalence-charge-transfer bands observed in the near-IR region in [H(2)TFcP](+) and [H(2)TFcP](2+) complexes were analyzed using Hush formalism and found to be of class II (in Robin-Day classification) character with localized ferrous and ferric centers. Class II behavior of [H(2)TFcP](+) and [H(2)TFcP](2+) complexes was further confirmed by Mossbauer, IR, and XPS data.
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Affiliation(s)
- Victor N Nemykin
- Department of Chemistry & Biochemistry, University of Minnesota-Duluth, Duluth, Minnesota 55812, USA.
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43
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Odom SA, Kelley RF, Ohira S, Ensley TR, Huang C, Padilha LA, Webster S, Coropceanu V, Barlow S, Hagan DJ, Van Stryland EW, Brédas JL, Anderson HL, Wasielewski MR, Marder SR. Photophysical Properties of an Alkyne-Bridged Bis(zinc porphyrin)−Perylene Bis(dicarboximide) Derivative. J Phys Chem A 2009; 113:10826-32. [DOI: 10.1021/jp905214g] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Susan A. Odom
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Richard F. Kelley
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Shino Ohira
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Trenton R. Ensley
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Chun Huang
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Lazaro A. Padilha
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Scott Webster
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Veaceslav Coropceanu
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Stephen Barlow
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - David J. Hagan
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Eric W. Van Stryland
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Jean-Luc Brédas
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Harry L. Anderson
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Michael R. Wasielewski
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
| | - Seth R. Marder
- Department of Chemistry and Biochemistry and The Center for Organic Photonics and Electronics (COPE), Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, Department of Chemistry and Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, CREOL and Department of Physics, University of Central Florida, Orlando, Florida 32816-2700, and Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1
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44
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Hadt RG, Nemykin VN. Exploring the ground and excited state potential energy landscapes of the mixed-valence biferrocenium complex. Inorg Chem 2009; 48:3982-92. [PMID: 19344155 DOI: 10.1021/ic801801m] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Density functional theory (DFT) and time-dependent DFT (TDDFT) have been used to explore the potential energy landscapes in the class II (in Robin and Day classification) mixed-valence biferrocenium mono-cation (BF(+)) in an effort to evaluate factors affecting optical and thermal intramolecular electron transfer rates. Both energy- and spectroscopy-based benchmarks were used to explore the adiabatic potential energy surfaces (PESs) of the mixed-valence BF(+) cation along with the optimization of appropriate ground-, excited-, and transition-state geometries. The calculation of Mossbauer isomer shifts and quadrupole splittings, UV-vis excitation energies, and the electronic coupling matrix element, H(ab), corroborate the PES analyses. The adiabatic electron transfer pathway is also analyzed with respect to several possible vibronic coordinates. The degree of the electronic coupling between iron sites, the value of H(ab), and the nature of the electron transfer pathway correlate with the amount of Hartree-Fock exchange involved in the DFT calculation with hybrid (approximately 20% of Hartree-Fock exchange) methods providing the best agreement between theory and experiment. DFT (B3LYP) predicted values of H(ab) (839, 1085, and 1265 cm(-1)) depend on the computational method and are in good agreement with experimental data.
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Affiliation(s)
- Ryan G Hadt
- Department of Chemistry & Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812, USA
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45
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Kowalski K, Linseis M, Winter RF, Zabel M, Záliš S, Kelm H, Krüger HJ, Sarkar B, Kaim W. Charge Delocalization in a Heterobimetallic Ferrocene−(Vinyl)Ru(CO)Cl(PiPr3)2 System†Dedicated to Prof. Dr. Helmut Werner on the occasion of his 75th birthday. Organometallics 2009. [DOI: 10.1021/om9002945] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Konrad Kowalski
- Department of Organic Chemistry, Faculty of Chemistry, University of Łódź, Narutowicza 68, 90-136 Łódź, Poland
- Institut für Anorganische Chemie der Universität Regensburg, Universitätsstrasse 31, D-93040 Regensburg, Germany
| | - Michael Linseis
- Institut für Anorganische Chemie der Universität Regensburg, Universitätsstrasse 31, D-93040 Regensburg, Germany
| | - Rainer F. Winter
- Institut für Anorganische Chemie der Universität Regensburg, Universitätsstrasse 31, D-93040 Regensburg, Germany
| | - Manfred Zabel
- Institut für Anorganische Chemie der Universität Regensburg, Universitätsstrasse 31, D-93040 Regensburg, Germany
| | - Stanislav Záliš
- Heyrovský Institute of Physical Chemistry v.v.i., Academy of Science of the Czech Republic, 18223 Prague, Czech Republic
| | - Harald Kelm
- Fachbereich Chemie der TU Kaiserslautern, Erwin-Schrödinger-Strasse, D-67663 Kaiserslautern, Germany
| | - Hans-Jörg Krüger
- Fachbereich Chemie der TU Kaiserslautern, Erwin-Schrödinger-Strasse, D-67663 Kaiserslautern, Germany
| | - Biprajit Sarkar
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring, D-70569 Stuttgart, Germany
| | - Wolfgang Kaim
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring, D-70569 Stuttgart, Germany
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46
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Kinnibrugh TL, Salman S, Getmanenko YA, Coropceanu V, Porter WW, Timofeeva TV, Matzger AJ, Brédas JL, Marder SR, Barlow S. Dipolar Second-Order Nonlinear Optical Chromophores Containing Ferrocene, Octamethylferrocene, and Ruthenocene Donors and Strong π-Acceptors: Crystal Structures and Comparison of π-Donor Strengths. Organometallics 2009; 28:1350-1357. [PMID: 20047010 PMCID: PMC2669306 DOI: 10.1021/om800986s] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Crystal structures have been determined for six dipolar polyene chromophores with metallocenyl - ferrocenyl (Fc), octamethylferrocenyl (Fc″), or ruthenocenyl (Rc) - donors and strong heterocyclic acceptors based on 1,3-diethyl-2-thiobarbituric acid or 3-dicyanomethylidene-2,3-dihydrobenzothiophene-1,1-dioxide. In each case, crystals were found to belong to centrosymmetric space groups. For one example, polymer-induced heteronucleation revealed the existence of two additional polymorphs, which were inactive in second-harmonic generation, suggesting that they were also centrosymmetric. The bond-length alternations between the formally double and single bonds of the polyene bridges are reduced compared to simple polyenes, indicating significant contribution from charge-separated resonance structures, although the metallocenes are not significantly distorted towards the [(η(6)-fulvene)(η(5)-cyclopentadienyl)metal(II)](+) extreme. DFT geometries are in excellent agreement with those determined crystallographically; while the π-donor strengths of the three metallocenyl groups are insufficiently different to result in detectable differences in the crystallographic bond-length alternations, the DFT geometries, as well as DFT-calculations of partial charges for atoms, suggest that π-donor strength decreases in the order Fc″ ≫ Fc > Rc. NMR, IR and electrochemical evidence also suggests that octamethylferrocenyl is the stronger π-donor, exhibiting similar π-donor strength to a p-(dialkylamino)phenyl group, while ferrocenyl and ruthenocenyl show very similar π-donor strengths to one another in chromophores of this type.
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47
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Otón F, Espinosa A, Tárraga A, Molina P. Synthesis of Multifunctional Aza-Substituted Ruthenocene Derivatives Displaying Charge-Transfer Transitions and Selective Zn(II) Ions Sensing Properties. Organometallics 2007. [DOI: 10.1021/om700757m] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Francisco Otón
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
| | - Arturo Espinosa
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
| | - Alberto Tárraga
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
| | - Pedro Molina
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
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48
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Hillard EA, Pigeon P, Vessières A, Amatore C, Jaouen G. The influence of phenolic hydroxy substitution on the electron transfer and anti-cancer properties of compounds based on the 2-ferrocenyl-1-phenyl-but-1-ene motif. Dalton Trans 2007:5073-81. [PMID: 17992292 DOI: 10.1039/b705030e] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ferrocenyl compound 2-ferrocenyl-1,1-bis(4-hydroxyphenyl)-but-1-ene (), is very cytotoxic against breast cancer cells (IC(50) = 0.44 microM against MDA-MB-231). We now report the synthesis of a new series of para- and meta- substituted mono- and di- ferrocenyl phenols [2-ferrocenyl-1-(3-hydroxyphenyl)-1-phenyl-but-1-ene (), 2-ferrocenyl-1-(3-hydroxyphenyl)-1-(4-hydroxyphenyl)-but-1-ene (), 1,2-di-ferrocenyl-1-(4-hydroxyphenyl)-but-1-ene (), and 1,2-di-ferrocenyl-1-(3-hydroxyphenyl)-but-1-ene ()] and their electrochemical and biochemical properties, especially in comparison to the previously reported "standard" compounds [2-ferrocenyl-1-(4-hydroxyphenyl)-1-phenyl-but-1-ene () and ()]. We also report the synthesis and characterization of the diphenyl analogue, 2-ferrocenyl-1,1-diphenyl-but-1-ene (). This structure-activity relationship study was motivated by our hypothesis that the cytotoxicity of is related to its ability to form a quinone methide structure after two in situ 1-electron oxidations, a process which requires the presence of at least one p-phenol. The mono-ferrocenyl compounds (including those previously reported) are reasonably well recognized by the oestrogen receptors alpha (RBAs = 0.9-9.6%) and beta (RBAs = 0.28-16.3%), although the bulkier di-ferrocenyl compounds show very little affinity. In vitro, the cytotoxic effects of the phenolic complexes are related to the positioning of the hydroxyl group (para- superior to meta-), and to the number of ferrocenyl groups (one superior to two), with IC(50) values against the MDA-MB-231 cell line ranging from 0.44-3.5 microM. On the hormone-dependent breast cancer cell line MCF-7, the observed effect seems to be the result of two components, one cytotoxic (antiproliferative) and one estrogenic (proliferative). Electrochemical studies show that only the compounds with a p-phenol engage in proton-coupled intramolecular electron transfer.
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Affiliation(s)
- Elizabeth Anne Hillard
- Laboratoire de Chimie et Biochimie des Complexes Moléculaires, UMR CNRS 7576, Ecole Nationale Supérieure de Chimie de Paris, 11 rue Pierre et Marie Curie, 75231, Paris, Cedex 05, France
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49
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Santi S, Orian L, Durante C, Bencze EZ, Bisello A, Donoli A, Ceccon A, Benetollo F, Crociani L. Metal–Metal Electronic Coupling insyn andanti Stereoisomers of Mixed-Valent (FeCp)2-, (RhL2)2-, and (FeCp)(RhL2)-as-Indacenediide Ions. Chemistry 2007; 13:7933-47. [PMID: 17616957 DOI: 10.1002/chem.200700052] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The extent of metal-metal electronic coupling was quantified for a series of syn and anti stereoisomers of (FeCp)(2)-, (RhL(2))(2)- and (FeCp)(RhL(2))- (L(2)=1,5-cyclooctadiene (cod), L=CO) as-indacenediide mixed-valent ions by spectroelectrochemical and DFT studies. The effect of the syn/anti orientation of the metal units with respect to the planar aromatic ligand indicates that electron transfer occurs through the bridge rather than through space. The nature of the metal was found to be crucial: while homobimetallic diiron species are localised valence-trapped ions (Class II), the dirhodium analogues are almost delocalised mixed-valent ions (borderline and Class III). Finally, despite their redox asymmetry, even in the heterobimetallic iron-rhodium as-indacenediide complexes, strong metal-metal coupling is present. In fact, oxidation of the iron centre is accompanied by electron transfer from rhodium to iron and formation of a reactive 17-electron rhodium site. syn and anti Fe-Rh as-indacenediide complexes are rare examples of heterobimetallic systems which can be classified as borderline Class II/Class III species.
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Affiliation(s)
- Saverio Santi
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova via Marzolo 1, 35131 Padova, Italy.
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50
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Kondo M, Uchikawa M, Zhang WW, Namiki K, Kume S, Murata M, Kobayashi Y, Nishihara H. Protonation-Induced Cyclocondensation of 1-Aryl Ethynylanthraquinones: Expanding the π Conjugation. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701766] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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