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Lear BJ, Chisholm MH. Oxalate Bridged MM (MM = Mo2, MoW, and W2) Quadruply Bonded Complexes As Test Beds for Current Mixed Valence Theory: Looking beyond the Intervalence Charge Transfer Transition. Inorg Chem 2009; 48:10954-71. [DOI: 10.1021/ic900995u] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Benjamin J. Lear
- Department of Chemistry, The Ohio State University, Columbus, Ohio 43210
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2
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Nelsen SF, Konradsson AE, Weaver MN, Stephenson RM, Lockard JV, Zink JI, Zhao Y. Comparisons of Measured Rate Constants with Spectroscopically Determined Electron-Transfer Parameters. J Phys Chem B 2007; 111:6776-81. [PMID: 17388559 DOI: 10.1021/jp069032k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This work involves comparison of rate constants measured for an intervalence (IV) compound with electron-transfer parameters derived from its optical absorption spectrum. The temperature-dependent rate constants for the radical cation having 3-tert-butyl-2,3-diazabicyclo[2.2.2]oct-2-yl (hydrazine) charge-bearing units attached para to a tetramethylbenzene bridge (1+) were previously measured. In this study, resonance Raman is used to calculate the magnitudes of the distortions of normal modes of vibration caused by excitation into the intervalence absorption band. These data produce a vibrational reorganization energy lambdavsym of 9250 cm(-1), and averaged single-mode omegav for use in the Golden Rule equation of 697 cm(-1). Zhu-Nakamura theory has been used to calculate preexponential factors for analysis of the previously measured variable temperature optical spectra using quartic-enhanced intervalence bands to extract the total reorganization energy and the intramolecular electron-transfer rate constants for intramolecular electron transfer using electron spin resonance. In contrast to using the Golden Rule equation, separation of lambda into solvent and vibrational components is not significant for these data. The Zhu-Nakamura theory calculations produce ln(k/T) versus 1/T slopes that are consistent with the experimental data for electronic couplings that are somewhat larger than the values obtained from the optical spectra using Hush's method.
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Affiliation(s)
- Stephen F Nelsen
- Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706-1396, USA
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3
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Bixon M, Jortner J. Electron Transfer-from Isolated Molecules to Biomolecules. ADVANCES IN CHEMICAL PHYSICS 2007. [DOI: 10.1002/9780470141656.ch3] [Citation(s) in RCA: 232] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Jayaweera P, Rajapaksha R, Tennakone K. TiO2 nano-porous photoelectrochemical cells (PECs) sensitized with mixed cationic/anionic dye systems: Role of the second cationic fluorescent dye on the photocurrent enhancement. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.06.082] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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5
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A comparative study on metal–metal interaction in binuclear two- and three-coordinated d10-metal complexes. Coord Chem Rev 2005. [DOI: 10.1016/j.ccr.2004.09.015] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Szeghalmi AV, Erdmann M, Engel V, Schmitt M, Amthor S, Kriegisch V, Nöll G, Stahl R, Lambert C, Leusser D, Stalke D, Zabel M, Popp J. How Delocalized Is N,N,N‘,N‘-Tetraphenylphenylenediamine Radical Cation? An Experimental and Theoretical Study on the Electronic and Molecular Structure. J Am Chem Soc 2004; 126:7834-45. [PMID: 15212531 DOI: 10.1021/ja0395386] [Citation(s) in RCA: 139] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The electronic and molecular structure of N,N,N',N'-tetraphenylphenylenediamine radical cation 1(+) is in focus of this study. Resonance Raman experiments showed that at least eight vibrational modes are strongly coupled to the optical charge resonance band which is seen in the NIR. With the help of a DFT-based vibrational analysis, these eight modes were assigned to symmetric vibrations. The contribution of these symmetric modes to the total vibrational reorganization energy is dominant. These findings are in agreement with the conclusions from a simple two-state two-mode Marcus-Hush analysis which yields a tiny electron-transfer barrier. The excellent agreement of the X-ray crystal structure analysis and the DFT computed molecular structure of 1(+) on one hand as well as the solvent and solid-state IR spectra and the DFT-calculated IR active vibrations on the other hand prove 1(+) adopts a symmetrical delocalized Robin-Day class III structure both in the solid state and in solution.
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Affiliation(s)
- Adriana V Szeghalmi
- Institut für Physikalische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
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Rubtsov IV, Kang YK, Redmore NP, Allen RM, Zheng J, Beratan DN, Therien MJ. The Degree of Charge Transfer in Ground and Charge-Separated States Revealed by Ultrafast Visible Pump/Mid-IR Probe Spectroscopy. J Am Chem Soc 2004; 126:5022-3. [PMID: 15099057 DOI: 10.1021/ja030674k] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate a new femtosecond visible pump/mid-IR probe spectroscopic approach to assess directly the ground- and excited-state degrees of charge transfer (CT) in donor-spacer-acceptor (D-Sp-A) structures. Two classes of (porphinato)zinc(II) (PZn)-based D-Sp-A compounds with either quinonyl (Q) or N-(N'-octyl)pyromellitic diimide (PI) electron acceptors were interrogated. Carbonyl antisymmetric stretching mode frequency domain transient-IR spectra of these species were recorded and analyzed for the Q/PI moieties. These data show that the acceptor mode frequency shift, DeltanuA, determined by this method provides a more accurate measure of the degree of CT in ground and charge-separated states relative to other techniques which rely on the ground-state frequency shift alone. This approach enables determination of new experimental benchmarks to test the power of complimentary computational methods and provides a means to probe the degree of CT in transitions that either overlap strongly with other bands or possess low oscillator strength.
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Affiliation(s)
- Igor V Rubtsov
- Department of Chemistry, University of Pennsylvania, Philadelphia, 19104-6323, USA
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Leung KH, Phillips DL, Mao Z, Che CM, Miskowski VM, Chan CK. Electronic excited states of [Au(2)(dmpm)(3)](ClO(4))(2) (dmpm= bis(dimethylphosphine)methane). Inorg Chem 2002; 41:2054-9. [PMID: 11952358 DOI: 10.1021/ic011084v] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present studies of the resonance Raman and electronic luminescence spectra of the [Au(2)(dmpm)(3)](ClO(4))(2) (dmpm = bis(dimethylphosphine)methane) complex, including excitation into an intense band at 256 nm and into a weaker absorption system centered about approximately 300 nm. The resonance Raman spectra confirm the assignment of the 256 nm absorption band to a (1)(dsigma --> psigma) transition, a metal-metal-localized transition, in that nu(Au-Au) and overtones of it are strongly enhanced. A resonance Raman intensity analysis of the spectra associated with the 256 nm absorption band gives the ground-state and excited-state nu(Au-Au) stretching frequencies to be 79 and 165 cm(-1), respectively, and the excited-state Au-Au distance is calculated to decrease by about 0.1 A from the ground-state value of 3.05 A. The approximately 300 nm absorption displays a different enhancement pattern, in that resonance-enhanced Raman bands are observed at 103 and 183 cm(-1) in addition to nu(Au-Au) at 79 cm(-1) The compound exhibits intense, long-lived luminescence (in room-temperature CH(3)CN, for example, tau = 0.70 micros, phi(emission) = 0.037) with a maximum at 550-600 nm that is not very medium-sensitive. We conclude, in agreement with an earlier proposal of Mason (Inorg. Chem. 1989, 28, 4366-4369), that the lowest-energy, luminescent excited state is not (3)(dsigma --> psigma) but instead derives from (3)(d(x2-y2,xy --> psigma) excitations. We compare the Au(I)-Au(I) interaction shown in the various transitions of the [Au(2)(dmpm)(3)](ClO(4))(2) tribridged compound with previous results for solvent or counterion exciplexes of [Au(2)(dcpm)(2)](2+) salts (J. Am. Chem. Soc. 1999, 121, 4799-4803; Angew. Chem. 1999, 38, 2783-2785; Chem. Eur. J. 2001, 7, 4656-4664) and for planar, mononuclear Au(I) triphosphine complexes. It is proposed that the luminescent state in all of these cases is very similar in electronic nature.
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Affiliation(s)
- King Hung Leung
- Department of Chemistry and the HKU-CAS Joint Laboratory on New Materials, The University of Hong Kong, Pokfulam Road, Hong Kong
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Cheng YF, Phillips DL, He GZ, Che CM, Chi Y. Resonance Raman and density functional study of the A-band absorption of C5H5[WCCPh]O2. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00292-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ferretti A, Improta R, Lami A, Villani G. Vibronic Model Hamiltonian for the Study of the Near-IR−Visible Optical Properties of [(NH3)5Ru−(4,4‘-bipyridine)−Ru(NH3)5]m+ (m = 4, 5): Charge Localization and Electroabsorption Spectra. J Phys Chem A 2000. [DOI: 10.1021/jp0015168] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alessandro Ferretti
- Istituto di Chimica Quantistica ed Energetica Molecolare del CNR, Area della Ricerca, Via Alfieri 1, I-56010 Ghezzano (PI), Italy
| | - Roberto Improta
- Istituto di Chimica Quantistica ed Energetica Molecolare del CNR, Area della Ricerca, Via Alfieri 1, I-56010 Ghezzano (PI), Italy
| | - Alessandro Lami
- Istituto di Chimica Quantistica ed Energetica Molecolare del CNR, Area della Ricerca, Via Alfieri 1, I-56010 Ghezzano (PI), Italy
| | - Giovanni Villani
- Istituto di Chimica Quantistica ed Energetica Molecolare del CNR, Area della Ricerca, Via Alfieri 1, I-56010 Ghezzano (PI), Italy
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Choi CL, Cheng YF, Yip C, Phillips DL, Yam VWW. Resonance Raman and Emission Investigation of the MLCT Transition in Pt(PEt3)2(C⋮CH)2. Organometallics 2000. [DOI: 10.1021/om000135d] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chi Leung Choi
- Department of Chemistry, University of Hong Kong, Pokfulam Road, Hong Kong
| | - Yung Fong Cheng
- Department of Chemistry, University of Hong Kong, Pokfulam Road, Hong Kong
| | - Carol Yip
- Department of Chemistry, University of Hong Kong, Pokfulam Road, Hong Kong
| | - David Lee Phillips
- Department of Chemistry, University of Hong Kong, Pokfulam Road, Hong Kong
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Cacelli I, Ferretti A. Theoretical Study of the Absorption Spectrum of [(NH3)5Ru−(4,4‘-bipyridine)]2+ in Solution. J Phys Chem A 1999. [DOI: 10.1021/jp990489m] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ivo Cacelli
- Scuola Normale Superiore, Piazza dei Cavalieri, I-56126 Pisa, Italy, and Istituto di Chimica Quantistica ed Energetica Molecolare and MITER del CNR, Via Risorgimento 35, I-56126 Pisa, Italy
| | - Alessandro Ferretti
- Scuola Normale Superiore, Piazza dei Cavalieri, I-56126 Pisa, Italy, and Istituto di Chimica Quantistica ed Energetica Molecolare and MITER del CNR, Via Risorgimento 35, I-56126 Pisa, Italy
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13
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Leung KH, Phillips DL, Tse MC, Che CM, Miskowski VM. Resonance Raman Investigation of the Au(I)−Au(I) Interaction of the 1[dσ*pσ] Excited State of Au2(dcpm)2(ClO4)2 (dcpm = Bis(dicyclohexylphosphine)methane). J Am Chem Soc 1999. [DOI: 10.1021/ja990195e] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- King Hung Leung
- Contribution from the Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - David Lee Phillips
- Contribution from the Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Man-Chung Tse
- Contribution from the Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Chi-Ming Che
- Contribution from the Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Vincent M. Miskowski
- Contribution from the Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong
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Kumar K, Kurnikov IV, Beratan DN, Waldeck DH, Zimmt MB. Use of Modern Electron Transfer Theories To Determine Electronic Coupling Matrix Elements in Intramolecular Systems. J Phys Chem A 1998. [DOI: 10.1021/jp980113t] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Krishna Kumar
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, and Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - Igor V. Kurnikov
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, and Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - David N. Beratan
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, and Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - David H. Waldeck
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, and Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - Matthew B. Zimmt
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, and Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
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Kwok WM, Phillips DL, Yeung PKY, Yam VWW. Resonance Raman Investigation of the MLCT Transition in [Pt(dppm)2(PhC⋮C)2] and the MMLCT Transition in [Pt2(μ-dppm)2(μ-PhC⋮C)(PhC⋮C)2]+. J Phys Chem A 1997. [DOI: 10.1021/jp972374t] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wai Ming Kwok
- Department of Chemistry, University of Hong Kong, Pokfulam Road, Hong Kong
| | - David Lee Phillips
- Department of Chemistry, University of Hong Kong, Pokfulam Road, Hong Kong
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Williams RD, Petrov VI, Lu HP, Hupp JT. Intramolecular Electron Transfer in Biferrocene Monocation: Evaluation of Franck−Condon Effects via a Time-Dependent Analysis of Resonance Raman Scattering in the Extended Near-Infrared. J Phys Chem A 1997. [DOI: 10.1021/jp9633308] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert D. Williams
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208
| | - Vladimir I. Petrov
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208
| | - Hong Peter Lu
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208
| | - Joseph T. Hupp
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208
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Kwok WM, Phillips DL, Yeung PKY, Yam VWW. Vibrational reorganizational energies of the MLCT transition in Pt(dppm)2(PhCC)2 and the MMLCT transition in [Pt2(μ-dppm)2(μ-PhCC)(PhCC)2]+. Chem Phys Lett 1996. [DOI: 10.1016/s0009-2614(96)01139-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Myers AB. Resonance Raman Intensities and Charge-Transfer Reorganization Energies. Chem Rev 1996; 96:911-926. [PMID: 11848775 DOI: 10.1021/cr950249c] [Citation(s) in RCA: 252] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anne B. Myers
- Department of Chemistry and Center for Photoinduced Charge Transfer, University of Rochester, Rochester, New York 14627-0216
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Nelsen SF. Dynamics Calculations on Bis(hydrazine) and Bis(hydrazyl) Radical Cation Intramolecular Electron Transfer. J Am Chem Soc 1996. [DOI: 10.1021/ja952539g] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stephen F. Nelsen
- Contribution from the S. M. McElvain Laboratories of Organic Chemistry, Department of Chemistry, University of Wisconsin, 1101 West University Avenue, Madison, Wisconsin 53706-1396
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Crutchley RJ. Intervalence Charge Transfer and Electron Exchange Studies of Dinuclear Ruthenium Complexes. ADVANCES IN INORGANIC CHEMISTRY 1994. [DOI: 10.1016/s0898-8838(08)60174-9] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lee SL, Li FY, Dong TY. Effect of structural modifications on electron delocalization of mixed-valence biferrocenium systems. Chem Phys Lett 1990. [DOI: 10.1016/0009-2614(90)85537-m] [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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