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Grey JK. Resonance Raman Spectroscopy and Imaging of Franck-Condon Vibrational Activity and Morphology in Conjugated Polymers for Solar Cells. Acc Chem Res 2019; 52:2221-2231. [PMID: 31369235 DOI: 10.1021/acs.accounts.9b00088] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Vibrational reorganization influences photophysical outcomes in conjugated polymers used as active materials for optoelectronic devices. Excited state geometric rearrangements typically involve many displaced vibrations, yet most materials design schemes rely solely on pure electronic models with limited predictive capability. Although the coupling of vibrational motions to electronic processes occurs over a broad range of time scales, resolving structural displacements immediately following photon absorption can be particularly insightful for understanding the intrinsic stabilities of excited states. These Franck-Condon vibrational relaxation processes occur on time scales of <1 ps in polymers and mainly involve high-frequency skeletal motions. Establishing correlations between Franck-Condon vibrational reorganization and steady-state material properties could generate new avenues for informing materials design, which is especially important in the fast-paced field of organic photovoltaics (OPV) where seemingly elegant strategies often fail but molecular-level insights are usually lacking. The goal of this Account is to highlight relationships between molecular structure, packing, and vibrational reorganization in OPV systems, such as blends of conjugated polymers with fullerenes. Resonance Raman spectroscopy (RRS) is a sensitive probe of Franck-Condon activity in OPV materials, and signals are bolstered by large resonance enhancements and low backgrounds from quantitative fluorescence quenching. Our group has undertaken extensive RRS investigations of heterogeneous OPV materials in functioning device environments to uncover new insights of the multidimensional excited state potential energy landscape and fluctuations with local morphology. Time-dependent quantum mechanical approaches facilitate this effort by providing an intuitive theoretical framework to access dynamical perspectives of Raman transitions. Moreover, dynamics regimes of Franck-Condon excited state structural evolution can be selected simply by tuning excitation energies. This excitation detuning approach also reveals structurally and electronically distinct conformers with unique Franck-Condon signatures typically concealed under inhomogeneously broadened absorption line shapes. Interestingly, long and rich progressions of overtone and combination transitions-rare for large molecules with multiple displaced modes-are frequently resolved that exhibit strong sensitivity to the local chromophore environment. These harmonic features encode useful dynamics information by serving as internal "clocks" of Franck-Condon vibrational activity in addition to enabling quantitative estimates of mode-specific displacements. RRS attributes may be further exploited to perform noninvasive imaging of functioning OPV devices in concert with variable frequency electrical imaging probes. This approach generates direct spatial correlations between morphology-dependent Franck-Condon vibrational activity and material performance metrics (e.g., photocurrent generation) on submicrometer size scales.
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Affiliation(s)
- John K. Grey
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
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Harris JP, Reber C, Colmer HE, Jackson TA, Forshaw AP, Smith JM, Kinney RA, Telser J. Near-infrared 2Eg → 4A2g and visible LMCT luminescence from a molecular bis-(tris(carbene)borate) manganese(IV) complex. CAN J CHEM 2017. [DOI: 10.1139/cjc-2016-0607] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The molecular bis-(tris(carbene)borate) manganese(IV) complex [{PhB(MeIm)3}2Mn](OTf)2 shows 2Eg → 4A2g luminescence at 828 nm in the solid state at 85 K; this wavelength is longer by approximately 100 nm than the wavelengths typically observed for manganese(IV) and chromium(III) doped solids and for molecular chromium(III) complexes. Weak luminescence is also observed from a LMCT excited state with an absorption maximum at 500 nm. This represents the first molecular manganese(IV) compound for which luminescence has been reported.
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Affiliation(s)
- Joe P. Harris
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Christian Reber
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Hannah E. Colmer
- Department of Chemistry, University of Kansas, Lawrence, KS 66045, USA
| | | | - Adam P. Forshaw
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM 88003, USA
| | - Jeremy M. Smith
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM 88003, USA
| | - R. Adam Kinney
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Joshua Telser
- Department of Biological, Chemical and Physical Sciences, Roosevelt University, Chicago, IL 60605, USA
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Abdolahzadeh S, de Boer JW, Browne WR. Redox-State Dependent Ligand Exchange in Manganese-Based Oxidation Catalysis. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500134] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Barandiarán Z, Seijo L. Intervalence charge transfer luminescence: interplay between anomalous and 5d - 4f emissions in Yb-doped fluorite-type crystals. J Chem Phys 2014; 141:234704. [PMID: 25527954 DOI: 10.1063/1.4902759] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this paper, we report the existence of intervalence charge transfer (IVCT) luminescence in Yb-doped fluorite-type crystals associated with Yb(2+)-Yb(3+) mixed valence pairs. By means of embedded cluster, wave function theory ab initio calculations, we show that the widely studied, very broad band, anomalous emission of Yb(2+)-doped CaF2 and SrF2, usually associated with impurity-trapped excitons, is, rather, an IVCT luminescence associated with Yb(2+)-Yb(3+) mixed valence pairs. The IVCT luminescence is very efficiently excited by a two-photon upconversion mechanism where each photon provokes the same strong 4f(14)-1A1g→ 4f(13)((2)F7/2)5deg-1T1u absorption in the Yb(2+) part of the pair: the first one, from the pair ground state; the second one, from an excited state of the pair whose Yb(3+) moiety is in the higher 4f(13)((2)F5/2) multiplet. The Yb(2+)-Yb(3+) → Yb(3+)-Yb(2+) IVCT emission consists of an Yb(2+) 5deg → Yb(3+) 4f7/2 charge transfer accompanied by a 4f7/2 → 4f5/2 deexcitation within the Yb(2+) 4f(13) subshell: [(2)F5/25deg,(2)F7/2] → [(2)F7/2,4f(14)]. The IVCT vertical transition leaves the oxidized and reduced moieties of the pair after electron transfer very far from their equilibrium structures; this explains the unexpectedly large band width of the emission band and its low peak energy, because the large reorganization energies are subtracted from the normal emission. The IVCT energy diagrams resulting from the quantum mechanical calculations explain the different luminescent properties of Yb-doped CaF2, SrF2, BaF2, and SrCl2: the presence of IVCT luminescence in Yb-doped CaF2 and SrF2; its coexistence with regular 5d-4f emission in SrF2; its absence in BaF2 and SrCl2; the quenching of all emissions in BaF2; and the presence of additional 5d-4f emissions in SrCl2 which are absent in SrF2. They also allow to interpret and reproduce recent experiments on transient photoluminescence enhancement in Yb(2+)-doped CaF2 and SrF2, the appearance of Yb(2+) 4f-5d absorption bands in the excitation spectra of the IR Yb(3+) emission in partly reduced CaF2:Yb(3+) samples, and to identify the broadband observed in the excitation spectrum of the so far called anomalous emission of SrF2:Yb(2+) as an IVCT absorption, which corresponds to an Yb(2+) 4f5/2 → Yb(3+) 4f7/2 electron transfer.
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Affiliation(s)
- Zoila Barandiarán
- Departamento de Química, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Luis Seijo
- Departamento de Química, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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Kiesz MD, Hoekstra RM, Chen YT, Telo JP, Nelsen SF, Zink JI. Coupled states in dinitrofluorene: relationships between ground state and excited state mixed valence. J Phys Chem A 2014; 118:11490-8. [PMID: 25402422 DOI: 10.1021/jp505299p] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The electronic absorption spectrum of 9,9-dimethyl-2,7-dinitrofluorene radical anion in HMPA displays both a NIR intervalence charge transfer and a visible excited state mixed valence transition. These transitions contain a similar vibronic progression resulting from molecular orbitals that are common to both transitions. Vibrational frequency and intensity data are acquired from the resonance Raman spectrum and used to calculate a best fit for the absorption spectrum. The normal coordinate distortions are analyzed in terms of the electronic changes for both transitions to explain their similarity. The Raman scattering intensity decreases at lower excitation wavelength as a result of Raman de-enhancement caused by interference between neighboring excited states.
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Affiliation(s)
- Matthew D Kiesz
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095, United States
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Mooney J, Kambhampati P. Correction to "Get the Basics Right: Jacobian Conversion of Wavelength and Energy Scales for Quantitative Analysis of Emission Spectra". J Phys Chem Lett 2014; 5:3497. [PMID: 26278599 DOI: 10.1021/jz401508t] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
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Krośnicki M, Kędziorski A, Seijo L, Barandiarán Z. Ab initio theoretical study on the 4f(2) and 4f5d electronic manifolds of cubic defects in CaF2:Pr3+. J Phys Chem A 2013; 118:358-68. [PMID: 24345034 DOI: 10.1021/jp410740u] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Wave function-based embedded cluster ab initio calculations have been carried out in order to study the 4f(2) and 4f5d energy levels of the cubic substitutional defect of Pr-doped CaF2. The 4f(2) → 4f5d absorption spectrum and 4f5d → 4f(2) emission spectrum have been calculated. The 4f(2 1)S0 level is found to be immersed in the 4f5d(eg) manifold, so that no quantum cutting from (1)S0 can occur and only strong 4f5d(eg) → 4f(2) emission is predicted, which supports previous assumptions made in order to explain results in CaF2:Pr(3+). The details of the 4f(2) → 4f5d(eg) and 4f(2) → 4f5d(t2g) bands of the absorption spectrum are interpreted and assignments are made. The lowest level of the 4f5d(eg) configuration is found to have 80% of singlet character, in opposition to Hund's Rules, and the issue is discussed in detail. The comparison between the experimental 4f5d(eg) → 4f(2) high resolution emission spectrum of the cubic site of CaF2:Pr(3+) and the calculated emission spectra from the two lowest 4f5d(eg) states 1T2u((1)T2u) and 1Eu(1(3)T2u) suggests the possibility that the experimental emission of the cubic Pr defect of CaF2:Pr(3+) is in fact a multiple emission.
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Affiliation(s)
- Marek Krośnicki
- Instytut Fizyki Teoretycznej i Astrofizyki, Uniwersytet Gdański , ul. Wita Stwosza 57, 80-952 Gdańsk, Poland
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Gao J, Grey JK. Resonance Raman overtones reveal vibrational displacements and dynamics of crystalline and amorphous poly(3-hexylthiophene) chains in fullerene blends. J Chem Phys 2013; 139:044903. [DOI: 10.1063/1.4815819] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Parker SF, Refson K, Bennett RD, Best J, Mel’nikov MY, Weinstein JA. Assignment of Metal–Ligand Modes in Pt(II) Diimine Complexes Relevant to Solar Energy Conversion. Inorg Chem 2012; 51:9748-56. [DOI: 10.1021/ic3011184] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Robert D. Bennett
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Jonathan Best
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
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Wise AJ, Grey JK. Resonance Raman studies of excited state structural displacements of conjugated polymers in donor/acceptor charge transfer complexes. Phys Chem Chem Phys 2012; 14:11273-6. [DOI: 10.1039/c2cp41748k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Suffren Y, Rollet FG, Reber C. RAMAN SPECTROSCOPY OF TRANSITION METAL COMPLEXES: MOLECULAR VIBRATIONAL FREQUENCIES, PHASE TRANSITIONS, ISOMERS, AND ELECTRONIC STRUCTURE. COMMENT INORG CHEM 2011. [DOI: 10.1080/02603594.2012.659776] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Wise AJ, Martin TP, Gao J, Vandergeest K, Grey JK. Observation of the missing mode effect in a poly-phenylenevinylene derivative: effect of solvent, chain packing, and composition. J Chem Phys 2010; 133:174901. [PMID: 21054063 DOI: 10.1063/1.3500658] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Optical emission spectra of poly[2-methoxy-5-[3('),7(')-dimethyloctyloxy)-1,4-phenylenevinylene] (MDMO-PPV) in dilute solutions exhibit a vibronic progression interval (∼1225 cm(-1)) that does not correspond to any ground state vibrational mode frequency. This phenomenon is assigned as the missing mode effect (MIME) in which five key displaced polymer backbone vibrational modes in the range of 800-1600 cm(-1) contribute to the MIME interval. Emission spectra are calculated by analytically solving the time-dependent Schrödinger equation using estimates of mode-specific vibrational displacements determined independently from preresonance Raman intensities. Emission spectra of MDMO-PPV thin films and nanoparticles are measured and lineshapes show an increase of the MIME frequency to ∼1340 cm(-1) in addition to changes in vibronic intensity distributions and energies. Composite blend thin films consisting of MDMO-PPV and a fullerene derivative (1:1 w/w) exhibit a substantially larger MIME interval (∼1450 cm(-1)) that arises from an increase in polymer chain planarity. This structural change is most apparent from large decreases of the excited state displacement of an out-of-plane C-H bending mode (961 cm(-1)) that becomes forbidden in the planar structure.
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Affiliation(s)
- Adam J Wise
- Department of Chemistry and Chemical Biology, University of New Mexico, MSC03 2060, Albuquerque, New Mexico 87131, USA
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Sánchez-Sanz G, Seijo L, Barandiarán Z. Electronic spectra of Yb2+-doped SrCl2. J Chem Phys 2010; 133:114506. [DOI: 10.1063/1.3490088] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Affiliation(s)
- Anne Myers Kelley
- School of Natural Sciences, University of California, Merced, California 95343;
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Sánchez-Sanz G, Seijo L, Barandiarán Z. Energy Gaps in the 4f135d1 Manifold and Multiple Spontaneous Emissions in Yb2+-Doped CsCaBr3. J Phys Chem A 2009; 113:12591-8. [DOI: 10.1021/jp904868b] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Goar Sánchez-Sanz
- Departamento de Química, C-XIV, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Luis Seijo
- Departamento de Química, C-XIV, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Zoila Barandiarán
- Departamento de Química, C-XIV, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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Sánchez-Sanz G, Seijo L, Barandiarán Z. Spin-forbidden and spin-enabled 4f14→4f135d1 transitions of Yb2+-doped CsCaBr3. J Chem Phys 2009; 131:024505. [DOI: 10.1063/1.3171567] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Biswas N, Thomas S, Kapoor S, Mishra A, Wategaonkar S, Mukherjee T. Studies on adsorption of mono- and multi-chromophoric hemicyanine dyes on silver nanoparticles by surface-enhanced resonance raman and theoretical calculations. J Chem Phys 2008; 129:184702. [DOI: 10.1063/1.3009626] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Neese F, Petrenko T, Ganyushin D, Olbrich G. Advanced aspects of ab initio theoretical optical spectroscopy of transition metal complexes: Multiplets, spin-orbit coupling and resonance Raman intensities. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.05.019] [Citation(s) in RCA: 253] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Vlček A, Záliš S. Modeling of charge-transfer transitions and excited states in d6 transition metal complexes by DFT techniques. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.05.021] [Citation(s) in RCA: 384] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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González E, Rodrigue-Witchel A, Reber C. Absorption spectroscopy of octahedral nickel(II) complexes: A case study of interactions between multiple electronic excited states. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.08.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Leadbeater NE. Organometallic Photochemistry: The Study of Short-Lived Intermediates. COMMENT INORG CHEM 2006. [DOI: 10.1080/02603599808012252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Reber C, Grey JK, Lanthier E, Frantzen KA. PRESSURE-INDUCED CHANGE OFd-dLUMINESCENCE ENERGIES, VIBRONIC STRUCTURE AND BAND INTENSITIES IN TRANSITION METAL COMPLEXES. COMMENT INORG CHEM 2005. [DOI: 10.1080/02603590500403909] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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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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25
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Beaulac R, Bussière G, Reber C, Lescop C, Luneau D. Solid-state absorption and luminescence spectroscopy of nitronyl nitroxide radicals. NEW J CHEM 2003. [DOI: 10.1039/b301479g] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Klein A, van Slageren J, Zális S. Participation of co-ligands in electronic transitions of platinum(II) diazabutadiene complexes. Inorg Chem 2002; 41:5216-25. [PMID: 12354055 DOI: 10.1021/ic025547o] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The low-lying electronic transitions and photochemical reactions of a series of [((i)Pr-DAB)Pt(R)(2)] (where the co-ligand R = CH(3), CD(3), adme, neop, neoSi, C(triple bond)C(t)Bu, C(triple bond)CPh, Ph, Mes) compounds were studied using both experimental (electronic absorption and resonance Raman spectroscopy) and theoretical (density functional theory, DFT) techniques. The high-lying filled orbitals were revealed to have a significant co-ligand contribution in the case of alkyl complexes, while this contribution is predominant for the complexes with unsaturated co-ligands. Because the electronic transition removes electron density from the sigma(Pt-C) bond in the former complexes, it is best described as a metal-to-ligand charge transfer transition (MLCT) with partial sigma-bond-to-ligand charge transfer (SBLCT) character. Because the sigma(Pt-C) orbital is not involved in the HOMOs of the latter complexes, the low-lying transitions were characterized as mixed MLCT/L'LCT, where L'LCT stands for ligand-to-ligand charge transfer from the pi system of the unsaturated co-ligand to the pi((i)Pr-DAB) orbital. The alkyl complexes are photoreactive on visible light irradiation with Pt-C bond homolysis as the primary step. The efficiency of the photoreaction increases with increasing sigma donor strength of the alkyl ligand. The absolute quantum yield is quite low. The other complexes are virtually photostable, except when irradiated at relatively high energies.
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Affiliation(s)
- Axel Klein
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
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Puranik M, Umapathy S. Excited State Structure and Dynamics ofp-Benzoquinone and Bromanil from Time-Resolved Resonance Raman Spectra and Simulation. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2002. [DOI: 10.1246/bcsj.75.1057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Puranik M, Umapathy S, Snijders JG, Chandrasekhar J. Structure of the triplet excited state of bromanil from time-resolved resonance Raman spectra and simulation. J Chem Phys 2001. [DOI: 10.1063/1.1398304] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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29
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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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30
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Leung KH, Szulbinski W, Le Phillips D. Comparison of the LMCT resonance Raman spectra of PdCl2(PCy3)2and PdCl2(PPh3)2: effect of the phenyl versus cyclohexyl substituents on the LMCT excited state. Mol Phys 2000. [DOI: 10.1080/002689700413578] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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31
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Cappa de Oliveira L, da Silva Lopes J, Barone P, Ribeiro M, Santos P. Resonance Raman investigation and semiempirical calculations of the bis(dicyanomethylene)croconate ion. J Mol Struct 1999. [DOI: 10.1016/s0022-2860(99)00077-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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32
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Syntheses, spectroscopic properties and photochemistry of [Re(R)(CO)3(4,4′-Me2-bpy)] (R=alkyl) complexes. Inorganica Chim Acta 1999. [DOI: 10.1016/s0020-1693(98)00278-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Lilichenko M, Tittelbach-Helmrich D, Verhoeven JW, Gould IR, Myers AB. Resonance Raman intensity analysis of a dicyanovinyl-azaadamantane: Mode-specific reorganization energies for charge-transfer and locally-excited states. J Chem Phys 1998. [DOI: 10.1063/1.477792] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Vlček A, Grevels FW, Snoeck TL, Stufkens DJ. Ground and electronically excited states of Cr(CO)4(bipyridine): energy factored force field analysis of CO stretching vibrations and resonance Raman study. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(97)00014-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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CHI LEUNG CHOI DAVID LEE PHILLIPS. Vibrational reorganizational energies of the A-band LMCT absorption in trans-dichlorobis (triphenylphosphine) palladium (II) determined from resonance Raman intensity analysis. Mol Phys 1998. [DOI: 10.1080/002689798168051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Kambhampati P, Child CM, Foster MC, Campion A. On the chemical mechanism of surface enhanced Raman scattering: Experiment and theory. J Chem Phys 1998. [DOI: 10.1063/1.475909] [Citation(s) in RCA: 218] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Biswas N, Umapathy S. Early time dynamics of trans-azobenzene isomerization in solution from resonance Raman intensity analysis. J Chem Phys 1997. [DOI: 10.1063/1.475097] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Nandita Biswas
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Siva Umapathy
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India
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de Oliveira LF, Dantas SO, Velozo ES, Santos PS, Ribeiro MC. Resonance Raman investigation and semi-empirical calculation of the natural carotenoid bixin. J Mol Struct 1997. [DOI: 10.1016/s0022-2860(97)00173-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hartl F, Barbaro P, Bell IM, Clark RJ, Snoeck TL, Vlček A. Valence localization in [M(triphos)(3,5-di-tert-butyl-catecholate)]+ ions (M = Co, Rh or Ir) probed by resonance Raman spectroscopy. Inorganica Chim Acta 1996. [DOI: 10.1016/s0020-1693(96)05309-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mašková E, Vlěk A. Excitation-energy dependent. photochemistry and resonance Raman spectra of Cr(CNPh)6. Inorganica Chim Acta 1996. [DOI: 10.1016/0020-1693(95)04844-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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de Mello MTS, Ribeiro MC, Santos PS. Resonance Raman spectroscopy of benzenedithiolate complexes: evidences of extensive delocalization of the chromophore. J Mol Struct 1995. [DOI: 10.1016/0022-2860(95)08955-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Resonance Raman spectroscopy of benzenedithiolate complexes: evidences of extensive delocalization of the chromophore. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0166-1280(95)90646-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Evidence for molecular distortion involving the carbonyl group in triplet states of carbonyl derivatives of naphthalene obtained from time resolved vibrational spectroscopic studies. Chem Phys 1995. [DOI: 10.1016/0301-0104(95)00117-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Lu H, Petrov V, Hupp JT. Intervalence excitation of the Creutz-Taube ion. Resonance Raman and time-dependent scattering studies of Franck-Condon effects. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)00150-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Johnson FPA, George MW, Morrison SL, Turner JJ. The structure of W(CO)5L (L = pyridine, piperidine) in the lowest ligand field excited state determined by fast time-resolved IR spectroscopy; unexpected C–O bond length changes. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/c39950000391] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Morrison SL, Turner JJ. The estimation of CO bond length changes in the excited states of transition metal carbonyls. J Mol Struct 1994. [DOI: 10.1016/0022-2860(93)07859-u] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Turner J, George M, Johnson F, Westwell J. Time-resolved infrared spectroscopy of excited states of transition metal species. Coord Chem Rev 1993. [DOI: 10.1016/0010-8545(93)85011-r] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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