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Zieleniewska A, Guldi DM. Investigating Electronic Communications in meso-meso Ethene-Bridged Unsymmetrical Diporphyrins. Chemistry 2019; 25:9602-9607. [PMID: 31112327 DOI: 10.1002/chem.201901716] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 05/17/2019] [Indexed: 11/06/2022]
Abstract
At the focal point of this work is the photophysical characterization of three meso-meso ethene-bridged diporphyrins featuring a diverse metallation pattern. Detailed investigations by means of cyclic voltammetry, absorption, fluorescence, and femto-/nanosecond transient absorption spectroscopy revealed the impact of open-shell nickel(II) on the electronic communication in ethene-bridged heterobimetallic diporphyrins.
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Affiliation(s)
- Anna Zieleniewska
- Department of Chemistry and Pharmacy, Friedrich-Alexander-University Erlangen-Nürnberg, 91058, Erlangen, Germany
| | - Dirk M Guldi
- Department of Chemistry and Pharmacy, Friedrich-Alexander-University Erlangen-Nürnberg, 91058, Erlangen, Germany
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2
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Moneo A, González-Orive A, Bock S, Fenero M, Herrer IL, Milan DC, Lorenzoni M, Nichols RJ, Cea P, Perez-Murano F, Low PJ, Martin S. Towards molecular electronic devices based on 'all-carbon' wires. NANOSCALE 2018; 10:14128-14138. [PMID: 29999063 DOI: 10.1039/c8nr02347f] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Nascent molecular electronic devices based on linear 'all-carbon' wires attached to gold electrodes through robust and reliable C-Au contacts are prepared via efficient in situ sequential cleavage of trimethylsilyl end groups from an oligoyne, Me3Si-(C[triple bond, length as m-dash]C)4-SiMe3 (1). In the first stage of the fabrication process, removal of one trimethylsilyl (TMS) group in the presence of a gold substrate, which ultimately serves as the bottom electrode, using a stoichiometric fluoride-driven process gives a highly-ordered monolayer, Au|C[triple bond, length as m-dash]CC[triple bond, length as m-dash]CC[triple bond, length as m-dash]CC[triple bond, length as m-dash]CSiMe3 (Au|C8SiMe3). In the second stage, treatment of Au|C8SiMe3 with excess fluoride results in removal of the remaining TMS protecting group to give a modified monolayer Au|C[triple bond, length as m-dash]CC[triple bond, length as m-dash]CC[triple bond, length as m-dash]CC[triple bond, length as m-dash]CH (Au|C8H). The reactive terminal C[triple bond, length as m-dash]C-H moiety in Au|C8H can be modified by 'click' reactions with (azidomethyl)ferrocene (N3CH2Fc) to introduce a redox probe, to give Au|C6C2N3HCH2Fc. Alternatively, incubation of the modified gold substrate supported monolayer Au|C8H in a solution of gold nanoparticles (GNPs), results in covalent attachment of GNPs on top of the film via a second alkynyl carbon-Au σ-bond, to give structures Au|C8|GNP in which the monolayer of linear, 'all-carbon' C8 chains is sandwiched between two macroscopic gold contacts. The covalent carbon-surface bond as well as the covalent attachment of the metal particles to the monolayer by cleavage of the alkyne C-H bond is confirmed by surface-enhanced Raman scattering (SERS). The integrity of the carbon chain in both Au|C6C2N3HCH2Fc systems and after formation of the gold top-contact electrode in Au|C8|GNP is demonstrated through electrochemical methods. The electrical properties of these nascent metal-monolayer-metal devices Au|C8|GNP featuring 'all-carbon' molecular wires were characterised by sigmoidal I-V curves, indicative of well-behaved junctions free of short circuits.
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Affiliation(s)
- Andrea Moneo
- Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009, Spain.
| | - Alejandro González-Orive
- Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009, Spain. and Instituto de Nanociencia de Aragón (INA) and Laboratorio de Microscopías Avanzadas (LMA), edificio i+d Campus Rio Ebro, Universidad de Zaragoza, C/Mariano Esquillor, s/n, 50018 Zaragoza, Spain
| | - Sören Bock
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Marta Fenero
- Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009, Spain. and Instituto de Nanociencia de Aragón (INA) and Laboratorio de Microscopías Avanzadas (LMA), edificio i+d Campus Rio Ebro, Universidad de Zaragoza, C/Mariano Esquillor, s/n, 50018 Zaragoza, Spain
| | - I Lucía Herrer
- Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009, Spain. and Instituto de Nanociencia de Aragón (INA) and Laboratorio de Microscopías Avanzadas (LMA), edificio i+d Campus Rio Ebro, Universidad de Zaragoza, C/Mariano Esquillor, s/n, 50018 Zaragoza, Spain
| | - David C Milan
- Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK
| | - Matteo Lorenzoni
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Campus UAB, 08193 Bellaterra, Spain
| | - Richard J Nichols
- Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK
| | - Pilar Cea
- Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009, Spain. and Instituto de Nanociencia de Aragón (INA) and Laboratorio de Microscopías Avanzadas (LMA), edificio i+d Campus Rio Ebro, Universidad de Zaragoza, C/Mariano Esquillor, s/n, 50018 Zaragoza, Spain
| | - Francesc Perez-Murano
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Campus UAB, 08193 Bellaterra, Spain
| | - Paul J Low
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Santiago Martin
- Departamento de Química Física, Facultad de Ciencias, Universidad de Zaragoza, 50009, Spain. and Instituto de Ciencias de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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3
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Al-Subi AH, Efimov A, Niemi M, Tkachenko NV, Lemmetyinen H. Effect of anion coordination on electron transfer in double-linked zinc phthalocyanine–fullerene dyad. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.04.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Brennan BJ, Liddell PA, Moore TA, Moore AL, Gust D. Hole Mobility in Porphyrin- and Porphyrin-Fullerene Electropolymers. J Phys Chem B 2012; 117:426-32. [DOI: 10.1021/jp3099945] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bradley J. Brennan
- Department of Chemistry and Biochemistry, Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287, United States
| | - Paul A. Liddell
- Department of Chemistry and Biochemistry, Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287, United States
| | - Thomas A. Moore
- Department of Chemistry and Biochemistry, Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287, United States
| | - Ana L. Moore
- Department of Chemistry and Biochemistry, Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287, United States
| | - Devens Gust
- Department of Chemistry and Biochemistry, Center for Bioenergy and Photosynthesis, Arizona State University, Tempe, Arizona 85287, United States
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IMAHORI HIROSHI, YAMADA KOJI, YOSHIZAWA EIICHI, HAGIWARA KIYOSHI, OKADA TADASHI, SAKATA YOSHITERU. Supramolecular Complexation of Porphyrin and Quinone with Two
Coordination Bonds and Intramolecular Electron Transfer. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1002/(sici)1099-1409(199701)1:1<55::aid-jpp6>3.0.co;2-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
V-shaped zinc porphyrin dimer and quinone with two pyridyl groups have
been rationally designed and synthesized to assemble a porphyrin-quinone
supramolecule with two coordination bonds. Selective formation of the 1:1
bridging structure between the host-guest molecules was seen by
1 H NMR and UV-Vis absorption spectroscopy.
Molecular mechanics calculation suggests that the bridging structure has
rigidity as well as flexibility in geometry between the redox pair, which
supports the interpretation of 1 H NMR studies.
Intramolecular photoinduced electron transfer from the excited singlet state
of the porphyrin to the quinone was observed by steady-state fluorescence
spectra and picosecond fluorescence lifetime measurements.
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Affiliation(s)
- HIROSHI IMAHORI
- The Institute of Scientific and Industrial Research, Osaka
University, Mihoga-oka, Ibaraki, Osaka 567, Japan
| | - KOJI YAMADA
- The Institute of Scientific and Industrial Research, Osaka
University, Mihoga-oka, Ibaraki, Osaka 567, Japan
| | - EIICHI YOSHIZAWA
- The Institute of Scientific and Industrial Research, Osaka
University, Mihoga-oka, Ibaraki, Osaka 567, Japan
| | - KIYOSHI HAGIWARA
- Department of Chemistry, Faculty of Engineering Science and
Research Center for Extreme Materials, Osaka University, Toyonaka, Osaka
560, Japan
| | - TADASHI OKADA
- Department of Chemistry, Faculty of Engineering Science and
Research Center for Extreme Materials, Osaka University, Toyonaka, Osaka
560, Japan
| | - YOSHITERU SAKATA
- The Institute of Scientific and Industrial Research, Osaka
University, Mihoga-oka, Ibaraki, Osaka 567, Japan
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Al-Subi AH, Niemi M, Ranta J, Tkachenko NV, Lemmetyinen H. Effect of halide binding on intramolecular exciplex of double-linked zinc porphyrin-fullerene dyad. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.02.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Al-Subi AH, Niemi M, Tkachenko NV, Lemmetyinen H. Effect of Anion Ligation on Electron Transfer of Double-Linked Zinc Porphyrin−Fullerene Dyad. J Phys Chem A 2011; 115:3263-71. [DOI: 10.1021/jp111234d] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Ali H Al-Subi
- Department of Chemistry and Bioengineering, Tampere University of Technology, Tampere, Finland.
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Danger BR, Bedient K, Maiti M, Burgess IJ, Steer RP. Photophysics of Self-Assembled Zinc Porphyrin−Bidentate Diamine Ligand Complexes. J Phys Chem A 2010; 114:10960-8. [DOI: 10.1021/jp106809j] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Brook R. Danger
- Department of Chemistry, University of Saskatchewan, 110 Science Place Saskatoon SK, Canada S7N 5C9
| | - Krysta Bedient
- Department of Chemistry, University of Saskatchewan, 110 Science Place Saskatoon SK, Canada S7N 5C9
| | - Manisankar Maiti
- Department of Chemistry, University of Saskatchewan, 110 Science Place Saskatoon SK, Canada S7N 5C9
| | - Ian J. Burgess
- Department of Chemistry, University of Saskatchewan, 110 Science Place Saskatoon SK, Canada S7N 5C9
| | - Ronald P. Steer
- Department of Chemistry, University of Saskatchewan, 110 Science Place Saskatoon SK, Canada S7N 5C9
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Wallin S, Monnereau C, Blart E, Gankou JR, Odobel F, Hammarström L. State-Selective Electron Transfer in an Unsymmetric Acceptor−Zn(II)porphyrin−Acceptor Triad: Toward a Controlled Directionality of Electron Transfer from the Porphyrin S2 and S1 States as a Basis for a Molecular Switch. J Phys Chem A 2010; 114:1709-21. [DOI: 10.1021/jp907824d] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Staffan Wallin
- Chemical Physics Group, Department of Photochemistry and Molecular Science, Uppsala University, Box 523 SE-751 20 Uppsala, Sweden, and Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM) UMR CNRS 6230, 2, rue de la Houssinière - BP 92208 - 44322 Nantes 3, France
| | - Cyrille Monnereau
- Chemical Physics Group, Department of Photochemistry and Molecular Science, Uppsala University, Box 523 SE-751 20 Uppsala, Sweden, and Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM) UMR CNRS 6230, 2, rue de la Houssinière - BP 92208 - 44322 Nantes 3, France
| | - Errol Blart
- Chemical Physics Group, Department of Photochemistry and Molecular Science, Uppsala University, Box 523 SE-751 20 Uppsala, Sweden, and Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM) UMR CNRS 6230, 2, rue de la Houssinière - BP 92208 - 44322 Nantes 3, France
| | - Jean-Richard Gankou
- Chemical Physics Group, Department of Photochemistry and Molecular Science, Uppsala University, Box 523 SE-751 20 Uppsala, Sweden, and Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM) UMR CNRS 6230, 2, rue de la Houssinière - BP 92208 - 44322 Nantes 3, France
| | - Fabrice Odobel
- Chemical Physics Group, Department of Photochemistry and Molecular Science, Uppsala University, Box 523 SE-751 20 Uppsala, Sweden, and Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM) UMR CNRS 6230, 2, rue de la Houssinière - BP 92208 - 44322 Nantes 3, France
| | - Leif Hammarström
- Chemical Physics Group, Department of Photochemistry and Molecular Science, Uppsala University, Box 523 SE-751 20 Uppsala, Sweden, and Chimie et Interdisciplinarité: Synthèse, Analyse, Modélisation (CEISAM) UMR CNRS 6230, 2, rue de la Houssinière - BP 92208 - 44322 Nantes 3, France
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Morisue M, Kameyama K, Kobuke Y. Electrochemical Oxidation Properties of Tetrakis(tert-butyl)phthalocyaninatozinc(II) in Non-Aqueous Media: A Reinvestigation into the Effects of Stacking, Axial Coordination, and Solvent. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2009. [DOI: 10.1246/bcsj.82.574] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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11
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Bahr JL, Kuciauskas D, Liddell PA, Moore AL, Moore TA, Gust D. Driving Force and Electronic Coupling Effects on Photoinduced Electron Transfer in a Fullerene-based Molecular Triad¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2000)0720598dfaece2.0.co2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Beer PD, Smith DK. Anion Binding and Recognition by Inorganic Based Receptors. PROGRESS IN INORGANIC CHEMISTRY 2007. [DOI: 10.1002/9780470166475.ch1] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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13
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Sun H, Biffinger JC, DiMagno SG. Ion pairing in tetraphenylporphyrin oxidation: a semiquantitative study. Dalton Trans 2005:3148-54. [PMID: 16172638 DOI: 10.1039/b506109a] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In 1,2-difluorobenzene (DFB), electrolyte conductivity measurements and cyclic voltammetric titration on the traditional benchmark tetraphenylporphyrin, H(2)tpp, permit the first estimate of ion pair association constants for singly- and doubly-oxidized free-base porphyrins. From ion titration cyclic voltammetry and digital simulation, measured association constants for H(2)tpp(+)X(-) were 65, 120, 210, 520 and 730 M(-1), for X(-)= PF(6)(-), ClO(4)(-), NTf(2)(-), BF(4)(-) and OTf(-), respectively, relative to the association constant for the H(2)tpp(+)TFPB(-) complex. By similar methods it was found that the association constants for the corresponding dication, H(2)tpp(2+), were at least 3.0 x 10(4) M(-1)(PF(6)(-)), 2.5 x 10(6) M(-1)(ClO(4)(-)), 5.2 x 10(5) M(-1)(NTf(2)(-)), 1.9 x 10(6) M(-1)(BF(4)(-)) and 2.7 x 10(6) M(-1)(OTf(-)). We demonstrate that differences in association constants allow the formal potential of the second oxidation of H(2)tpp to be shifted by more than 800 mV simply by varying the solvent and electrolyte. In addition, calculated electrostatic potential energy maps for porphyrin dications suggest that exposure of the core N-H groups is responsible for the change in ordering of anion affinities that occurs upon oxidation of H(2)tpp(+).
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Affiliation(s)
- Haoran Sun
- Department of Chemistry and Center for Materials Research and Analysis, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
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14
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Okamoto K, Ohkubo K, Kadish KM, Fukuzumi S. Remarkable Accelerating Effects of Ammonium Cations on Electron-Transfer Reactions of Quinones by Hydrogen Bonding with Semiquinone Radical Anions. J Phys Chem A 2004. [DOI: 10.1021/jp046078+] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Kadish KM, Lin M, Van Caemelbecke E, De Stefano G, Medforth CJ, Nurco DJ, Nelson NY, Krattinger B, Muzzi CM, Jaquinod L, Xu Y, Shyr DC, Smith KM, Shelnutt JA. Influence of electronic and structural effects on the oxidative behavior of nickel porphyrins. Inorg Chem 2002; 41:6673-87. [PMID: 12470062 DOI: 10.1021/ic0200702] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
With the aim of better understanding the electronic and structural factors which govern electron-transfer processes in porphyrins, the electrochemistry of 29 nickel(II) porphyrins has been examined in dichloromethane containing either 0.1 M tetra-n-butylammonium perchlorate (TBAP) or tetra-n-butylammonium hexafluorophosphate (TBAPF(6)) as supporting electrolyte. Half-wave potentials for the first oxidation and first reduction are only weakly dependent on the supporting electrolyte, but E(1/2) for the second oxidation varies considerably with the type of supporting electrolyte. E(1/2) values for the first reduction to give a porphyrin pi-anion radical are effected in large part by the electronic properties of the porphyrin macrocycle substituents, while half-wave potentials for the first oxidation to give a pi-cation radical are affected by the substituents as well as by nonplanar deformations of the porphyrin macrocycle. The potential difference between the first and second oxidations (Delta/Ox(2) - Ox(1)/) is highly variable among the 29 investigated compounds and ranges from 0 mV (two overlapped oxidations) to 460 mV depending on the macrocycle substituents and the anion of the supporting electrolyte. The magnitude of Delta/Ox(2) - Ox(1)/ is generally smaller for compounds with very electron-withdrawing substituents and when TBAP is used as the supporting electrolyte. This behavior is best explained in terms of differences in the binding strengths of anions from the supporting electrolyte (ClO(4)(-) or PF(6)(-)) to the doubly oxidized species. A closer analysis suggests two factors which are important in modulating Delta/Ox(2) - Ox(1)/ and thus the binding affinity of the anion to the porphyrin dication. One is the type of pi-cation radical (a proxy for the charge distribution in the dication), and the other is the conformation of the porphyrin macrocycle (either planar or nonplanar). These findings imply that the redox behavior of porphyrins can be selectively tuned to display separate or overlapped oxidation processes.
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Affiliation(s)
- Karl M Kadish
- Department of Chemistry, University of Houston, Texas 77204-5641, USA.
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16
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Davis WB, Ratner MA, Wasielewski MR. Dependence of electron transfer dynamics in wire-like bridge molecules on donor–bridge energetics and electronic interactions. Chem Phys 2002. [DOI: 10.1016/s0301-0104(02)00444-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Morandeira A, Engeli L, Vauthey E. Ultrafast Charge Recombination of Photogenerated Ion Pairs to an Electronic Excited State. J Phys Chem A 2002. [DOI: 10.1021/jp014393f] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Ana Morandeira
- Department of Physical Chemistry, University of Geneva, 30 quai Ernest Ansermet, CH-1211 Geneva, Switzerland
| | - Laurine Engeli
- Department of Physical Chemistry, University of Geneva, 30 quai Ernest Ansermet, CH-1211 Geneva, Switzerland
| | - Eric Vauthey
- Department of Physical Chemistry, University of Geneva, 30 quai Ernest Ansermet, CH-1211 Geneva, Switzerland
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18
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Kilså K, Macpherson AN, Gillbro T, Mårtensson J, Albinsson B. Control of electron transfer in supramolecular systems. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2001; 57:2213-2227. [PMID: 11603839 DOI: 10.1016/s1386-1425(01)00497-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The fluorescence quantum yield of zinc porphyrin (ZnP) covalently linked to 9,10-bis(phenylethynyl)anthracene (AB) is strongly dependent upon the solvent properties. The bichromophoric system ZnP-AB exhibits 'normal' zinc porphyrin fluorescence in solvents that cannot coordinate to the central zinc atom. In contrast, if a Lewis base, such as pyridine, is added to a sufficiently polar solvent, the fluorescence is significantly quenched. Picosecond transient absorption measurements, in conjunction with fluorescence quenching and cyclic voltammetric measurements, suggest that the quenching mechanism is intramolecular electron transfer from ZnP to AB. The charge separated state. ZnP*+-AB*-, has a lifetime of not more than 220 ps before recombining. If a secondary electron acceptor, iron(III) porphyrin (FeP), is covalently connected to the AB unit, a second electron transfer from AB*- to FeP occurs and the charge separated state, ZnP*+-AB-FeP*-, has a lifetime of at least 5 ns. This demonstrates that electron transfer might be sensitively tuned (switched on) by specific solvent effects.
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Affiliation(s)
- K Kilså
- Department of Physical Chemistry, Chalmers University of Technology, Göteborg, Sweden
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Driving force and electronic coupling effects on photoinduced electron transfer in a fullerene-based molecular triad. Photochem Photobiol 2000; 72:598-611. [PMID: 11107844 DOI: 10.1562/0031-8655(2000)072<0598:dfaece>2.0.co;2] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Tuning thermodynamic driving force and electronic coupling through structural modifications of a carotene (C) porphyrin (P) fullerene (C60) molecular triad has permitted control of five electron and energy transfer rate constants and two excited state lifetimes in order to prepare a high-energy charge-separated state by photoinduced electron transfer with a quantum yield of essentially unity (> or = 96%). Excitation of the porphyrin moiety of C-P-C60 is followed by a combination of photoinduced electron transfer to give C-P(.+)-C60.- and singlet-singlet energy transfer to yield C-P-1C60. The fullerene excited state accepts an electron from the porphyrin to also generate C-P(.+)-C60.-. Overall, this initial state is formed with a quantum yield of 0.97. Charge shift from the carotenoid to yield C(.+)-P-C60.- is at least 60 times faster than recombination of C-P(.+)-C60.-, leading to the overall quantum yield near unity for the final state. Formation of a similar charge-separate species from the zinc analog of the triad with a yield of 40% is also observed. Charge recombination of C(.+)-P-C60.- in 2-methyltetrahydrofuran yields the carotenoid triplet state, rather than the ground state. Comparison of the results for this triad with those for related triads with different structural features provides information concerning the effects of driving force and electronic coupling on each of the electron transfer steps.
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Beer PD, Gale PA, Chen Z. Electrochemical Recognition of Charged and Neutral Guest Species by Redox-active Receptor Molecules. ADVANCES IN PHYSICAL ORGANIC CHEMISTRY 1999. [DOI: 10.1016/s0065-3160(08)60192-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
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21
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Han W, Durantini EN, Moore TA, Moore AL, Gust D, Rez P, Leatherman G, Seely GR, Tao N, Lindsay. STM Contrast, Electron-Transfer Chemistry, and Conduction in Molecules. J Phys Chem B 1997. [DOI: 10.1021/jp972510u] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wenhai Han
- Department of Physics and Astronomy and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, and Department of Physics, Florida International University, Miami, Florida 33199
| | - Edgardo N. Durantini
- Department of Physics and Astronomy and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, and Department of Physics, Florida International University, Miami, Florida 33199
| | - Thomas A. Moore
- Department of Physics and Astronomy and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, and Department of Physics, Florida International University, Miami, Florida 33199
| | - Ana L. Moore
- Department of Physics and Astronomy and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, and Department of Physics, Florida International University, Miami, Florida 33199
| | - Devens Gust
- Department of Physics and Astronomy and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, and Department of Physics, Florida International University, Miami, Florida 33199
| | - Peter Rez
- Department of Physics and Astronomy and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, and Department of Physics, Florida International University, Miami, Florida 33199
| | - Gerald Leatherman
- Department of Physics and Astronomy and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, and Department of Physics, Florida International University, Miami, Florida 33199
| | - Gilbert R. Seely
- Department of Physics and Astronomy and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, and Department of Physics, Florida International University, Miami, Florida 33199
| | - Nongjian Tao
- Department of Physics and Astronomy and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, and Department of Physics, Florida International University, Miami, Florida 33199
| | - Lindsay
- Department of Physics and Astronomy and Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, and Department of Physics, Florida International University, Miami, Florida 33199
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22
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Savenije TJ, Koehorst RBM, Schaafsma TJ. Spectroelectrochemical Measurement of Charge Transport Properties of Electropolymerized Tetrakis(hydroxyphenyl)porphyrins. J Phys Chem B 1997. [DOI: 10.1021/jp9623406] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tom J. Savenije
- Department of Molecular Physics, Agricultural University, P.O. Box 8128, 6700 ET, Wageningen, The Netherlands
| | - Rob B. M. Koehorst
- Department of Molecular Physics, Agricultural University, P.O. Box 8128, 6700 ET, Wageningen, The Netherlands
| | - Tjeerd J. Schaafsma
- Department of Molecular Physics, Agricultural University, P.O. Box 8128, 6700 ET, Wageningen, The Netherlands
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23
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Lin CY, Spiro TG. Structural Distortion of the Vanadyltetraphenylporphine Anion Radical Probed by Resonance Raman Spectroelectrochemistry. Inorg Chem 1996. [DOI: 10.1021/ic960381a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ching-Yao Lin
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544
| | - Thomas G. Spiro
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544
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