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Tonami T, Nakano M, Kishi R, Kitagawa Y. Effects of introducing nitrogen atoms into oligoacene skeleton on vibronic coupling and singlet fission dynamics. Chem Phys Lett 2023. [DOI: 10.1016/j.cplett.2023.140311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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2
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Shizu K, Adachi C, Kaji H. Visual Understanding of Vibronic Coupling and Quantitative Rate Expression for Singlet Fission in Molecular Aggregates. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200159] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Katsuyuki Shizu
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
- Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
| | - Hironori Kaji
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
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Hirata S, Vacha M. Large Reverse Saturable Absorption at the Sunlight Power Level Using the Ultralong Lifetime of Triplet Excitons. J Phys Chem Lett 2017; 8:3683-3689. [PMID: 28726417 DOI: 10.1021/acs.jpclett.7b01456] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Large reverse saturable absorption (RSA) at the sunlight power level was observed from a host-guest amorphous material composed of d12-coronene as a guest and β-estradiol as a rigid amorphous host. The large highly symmetric two-dimensional (2D) aromatic structure of d12-coronene doped into the rigid host causes ultralong triplet lifetime as well as high triplet yield, serving efficient accumulation of the triplet excitons of d12-coronene under weak excitation light. The high absorption coefficient of the triplet state (σ34) compared with that of the ground state (σ01) for d12-coronene is also caused by the highly symmetric 2D aromatic structure. The efficient accumulation of the triplet excitons and high σ34 - σ01 led to an onset of the RSA characteristics under irradiance below 10-1 mW cm-2. A film of the amorphous material showed a large decrease of transmittance from 66% at 0.02 mW cm-2 to 24% at 50 mW cm-2 for continuous light at 405 nm.
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Affiliation(s)
- Shuzo Hirata
- Department of Materials Science and Engineering, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro, Tokyo 152-8552, Japan
| | - Martin Vacha
- Department of Materials Science and Engineering, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro, Tokyo 152-8552, Japan
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Sato T, Haruta N, Tanaka K. Thermodynamical vibronic coupling constant and density: Chemical potential and vibronic coupling in reactions. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.04.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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Huang JD, Li WL, Wen SH, Dong B. Electronic structure and microscopic charge-transport properties of a new-type diketopyrrolopyrrole-based material. J Comput Chem 2015; 36:695-706. [PMID: 25706355 DOI: 10.1002/jcc.23825] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 11/03/2014] [Accepted: 12/04/2014] [Indexed: 01/20/2023]
Abstract
Recently, diketopyrrolopyrrole (DPP)-based materials have attracted much interest due to their promising performance as a subunit in organic field effect transistors. Using density functional theory and charge-transport models, we investigated the electronic structure and microscopic charge transport properties of the cyanated bithiophene-functionalized DPP molecule (compound 1). First, we analyzed in detail the partition of the total relaxation (polaron) energy into the contributions from each vibrational mode and the influence of bond-parameter variations on the local electron-vibration coupling of compound 1, which well explains the effects of different functional groups on internal reorganization energy (λ). Then, we investigated the structural and electronic properties of compound 1 in its isolated molecular state and in the solid state form, and further simulated the angular resolution anisotropic mobility for both electron- and hole-transport using two different simulation methods: (i) the mobility orientation function proposed in our previous studies (method 1); and (ii) the master equation approach (method 2). The calculated electron-transfer mobility (0.00003-0.784 cm(2) V(-1) s(-1) from method 1 and 0.02-2.26 cm(2) V(-1) s(-1) from method 2) matched reasonably with the experimentally reported value (0.07-0.55 cm(2) V(-1) s(-1) ). To the best of our knowledge, this is the first time that the transport parameters of compound 1 were calculated in the context of band model and hopping models, and both calculation results suggest that the intrinsic hole mobility is higher than the corresponding intrinsic electron mobility. Our calculation results here will be instructive to further explore the potential of other higher DPP-containing quinoidal small molecules.
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Affiliation(s)
- Jin-Dou Huang
- School of Physics and Materials Engineering, Dalian Nationalities University, Dalian, 116600, China
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Saş EB, Kurt M, Can M, Okur S, İçli S, Demiç S. Structural investigation of a self-assembled monolayer material 5-[(3-methylphenyl) (phenyl) amino] isophthalic acid for organic light-emitting devices. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 133:307-317. [PMID: 24954755 DOI: 10.1016/j.saa.2014.05.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 05/01/2014] [Accepted: 05/09/2014] [Indexed: 06/03/2023]
Abstract
The molecular structure and vibrations of 5-[(3-methylphenyl) (phenyl) amino] isophthalic acid (MePIFA) were investigated by infrared and Raman spectroscopies, UV-Vis, (1)H and (13)C NMR spectroscopic techniques and NBO analysis. FT-IR, FT-Raman and dispersive Raman spectra were recorded in the solid phase. (1)H and (13)C NMR spectra and UV-Vis spectrum were recorded in DMSO solution. HOMO-LUMO analysis and molecular electrostatic potential (MEP) analysis were performed. The theoretical calculations for the molecular structure and spectroscopies were performed with DFT (B3LYP) and 6-311G(d,p) basis set calculations using the Gaussian 09 program. After the geometry of the molecule was optimized, vibration wavenumbers and fundamental vibration wavenumbers were assigned on the basis of the potential energy distribution (PED) of the vibrational modes calculated with VEDA 4 program. The total (TDOS), partial (PDOS) density of state and overlap population density of state (OPDOS) diagrams analysis were made using GaussSum 2.2 program. The results of theoretical calculations for the spectra of the title compound were compared with the observed spectra.
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Affiliation(s)
- E Babur Saş
- Department of Physics, Ahi Evran University, Kırsehir, Turkey
| | - M Kurt
- Department of Physics, Ahi Evran University, Kırsehir, Turkey.
| | - M Can
- Department of Engineering Sciences, Faculty of Engineering, Izmir Katip Celebi University, Cigli, 35620 Izmir, Turkey
| | - S Okur
- Izmir Katip Çelebi University, Material Science and Engineering, Çiğli, Izmir, Turkey
| | - S İçli
- Ege University, Solar Energy Institute, 35040 Bornova, Izmir, Turkey
| | - S Demiç
- Izmir Katip Çelebi University, Material Science and Engineering, Çiğli, Izmir, Turkey
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Uejima M, Sato T, Tanaka K, Kaji H. Enhancement of fluorescence in anthracene by chlorination: Vibronic coupling and transition dipole moment density analysis. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2013.12.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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8
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Percino MJ, Cerón M, Soriano-Moro G, Castro ME, Chapela VM, Bonilla J, Reyes-Reyes M, López-Sandoval R. The effect of the supramolecular network of (Z)-3-(4-(diphenylamino)phenyl)-2-(pyridin-2-yl)-acrylonitrile on the fluorescence behavior of a single crystal: experimental and theoretical studies. CrystEngComm 2014. [DOI: 10.1039/c4ce00327f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The molecular structure, molecular interactions, self-assembly behaviour and optical properties of a α,β-unsaturated nitrile were analyzed.
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Affiliation(s)
- M. Judith Percino
- Lab. de Polímeros
- Centro de Química
- Instituto de Ciencias
- Universidad Autónoma de Puebla
- C.P. 72570 Puebla, Mexico
| | - Margarita Cerón
- Lab. de Polímeros
- Centro de Química
- Instituto de Ciencias
- Universidad Autónoma de Puebla
- C.P. 72570 Puebla, Mexico
| | - Guillermo Soriano-Moro
- Lab. de Polímeros
- Centro de Química
- Instituto de Ciencias
- Universidad Autónoma de Puebla
- C.P. 72570 Puebla, Mexico
| | - M. Eugenia Castro
- Lab. de Polímeros
- Centro de Química
- Instituto de Ciencias
- Universidad Autónoma de Puebla
- C.P. 72570 Puebla, Mexico
| | - Víctor M. Chapela
- Lab. de Polímeros
- Centro de Química
- Instituto de Ciencias
- Universidad Autónoma de Puebla
- C.P. 72570 Puebla, Mexico
| | - José Bonilla
- Cento de Investigación en Materiales Avanzados S.C.(CIMAV-Unidad Monterrey)
- PIIT
- Apodaca-Nuevo León, Mexico
| | - Marisol Reyes-Reyes
- Universidad Autónoma de San Luis Potosí
- Instituto de Investigación en Comunicación Óptica. Av. Karakorum 1470
- San Luis Potosí, Mexico
| | - Román López-Sandoval
- Instituto Potosino de Investigación Científica y Tecnológica
- San Luis Potosí, Mexico
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Uejima M, Sato T, Yokoyama D, Tanaka K, Park JW. Quantum yield in blue-emitting anthracene derivatives: vibronic coupling density and transition dipole moment density. Phys Chem Chem Phys 2014; 16:14244-56. [DOI: 10.1039/c4cp01428f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Diagonal vibronic couplings in the Franck–Condon S1 state cause torsional distortion, which gives rise to enhancement of fluorescence with a large transition dipole moment.
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Affiliation(s)
- Motoyuki Uejima
- Department of Molecular Engineering
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510, Japan
| | - Tohru Sato
- Department of Molecular Engineering
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510, Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries
| | - Daisuke Yokoyama
- Department of Organic Device Engineering and Research Center of Organic Electronics (ROEL)
- Yamagata University
- Yonezawa, Japan
| | - Kazuyoshi Tanaka
- Department of Molecular Engineering
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510, Japan
| | - Jong-Wook Park
- Department of Chemistry/Display Research Center
- The Catholic University of Korea
- Bucheon 420-743, Republic of Korea
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Iwahara N, Sato T, Tanaka K, Kaji H. Vibronic couplings in C60 derivatives for organic photovoltaics. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.10.083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Uejima M, Sato T, Tanaka K, Kaji H. Vibronic coupling density analysis for the chain-length dependence of reorganization energies in oligofluorenes: a comparative study with oligothiophenes. Phys Chem Chem Phys 2013; 15:14006-16. [PMID: 23872623 DOI: 10.1039/c3cp51592c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The vibronic coupling constants and reorganization energies of oligofluorenes OF(n) (n = 1-6) are calculated for their cationic states (hole transport). Those of oligothiophenes OT(2n) (n = 1-6) are also calculated for comparison. The vibronic coupling constants of OF(n) are smaller than those of OT(2n), and decrease with increasing n. For the elucidation of the small vibronic couplings of the oligofluorenes, the calculated vibronic coupling constants are analyzed on the basis of the concept of vibronic coupling density. The vibronic coupling density of OF(n) becomes small in the middle of the chain with increasing n because of the reduction in the electron-density difference between the neutral and cationic states. It is found that orbital relaxation plays a crucial role in the distribution of the electron-density difference. From the fragment molecular orbital analyses, the large orbital relaxation in OF(n) is found to originate from the small transfer integral between the fragment molecular orbitals. These findings led to a design principle for a carrier-transporting oligomer/polymer with small vibronic couplings, or small reorganization energy, as follows: the orbital interaction between the monomers should be small from the view of vibronic couplings.
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Affiliation(s)
- Motoyuki Uejima
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
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Iwahara N, Sato T, Tanaka K. Effect of Coulomb interactions on the vibronic couplings in C60−. J Chem Phys 2012; 136:174315. [DOI: 10.1063/1.4709611] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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Iwahara N, Sato T, Tanaka K. Molecular design for high-spin molecules in view of vibronic couplings. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.01.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sumimoto M, Yokogawa D, Komeda M, Yamamoto H, Hori K, Fujimoto H. Theoretical investigation of the molecular structures and excitation spectra of triphenylamine and its derivatives. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 81:653-660. [PMID: 21795108 DOI: 10.1016/j.saa.2011.06.069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Revised: 06/21/2011] [Accepted: 06/26/2011] [Indexed: 05/31/2023]
Abstract
The molecular geometries, electronic structures, and excitation energies of NPh(3), NPh(2)Me, NPhMe(2), and NMe(3), were investigated using DFT and post-Hartree Fock methods. When the structural stabilities of these compounds were compared to results obtained by using MP4(SDQ) method, it was confirmed that the optimized geometries by using MP2 method were sufficiently reliable. The excited states with large oscillator strengths consisted of transition components from the HOMO. It should be noted that the orbitals of the nitrogen atom mix with the π-orbital of the phenyl group in an anti-bonding way in the HOMO, and the orbital energy increases with this mixing. The unoccupied orbitals are generated from bonding and anti-bonding type interactions between the π-orbitals of the phenyl groups; therefore, the number of phenyl groups strongly affects the energy diagram of the compounds studied. The differences in the energy diagram cause a spectral change in these compounds in the ultraviolet region.
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Affiliation(s)
- Michinori Sumimoto
- Division of Materials Science and Engineering, Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan.
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Vibronic interactions in hole-transporting molecules: An interplay with electron–hole interactions. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.03.078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Shizu K, Sato T, Ito A, Tanaka K, Kaji H. Theoretical design of a hole-transporting molecule: hexaaza[16]parabiphenylophane. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03802d] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Shizu K, Sato T, Tanaka K. Inelastic electron tunneling spectra and vibronic coupling density analysis of 2,5-dimercapto-1,3,4-thiadiazole and tetrathiafulvalene dithiol. NANOSCALE 2010; 2:2186-2194. [PMID: 20714648 DOI: 10.1039/c0nr00212g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We calculate inelastic electron tunneling (IET) spectra for 2,5-dimercapto-1,3,4-thiadiazole (DMcT) and tetrathiafulvalene dithiol (TTF-DT) sandwiched between two gold electrodes using non-equilibrium Green's function (NEGF) theory. The calculated peak positions are in reasonable agreement with the experimental data. We also calculate IET spectrum for thiophene dithiol (Th-DT) sandwiched between two gold electrodes and compare it with that for the Au/DMcT/Au junction. Th-DT and DMcT can be distinguished using the IET spectroscopy by the peak of the C-C stretching mode. The peak intensity in the IET spectra is analyzed using vibronic coupling density (VCD) analysis. For the Au/DMcT/Au junction, large distribution of electron-density difference Δρ(HOMO) on the C-N bond is responsible for the intense peak of the C-N stretching mode; on the other hand, for Au/TTF-DT/Au junction, large distribution of Δρ(HOMO) on the central C=C bond is responsible for the intense peak of the C=C stretching modes.
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Affiliation(s)
- Katsuyuki Shizu
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
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Reduced vibronic coupling density and its application to bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF). Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.03.063] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Shizu K, Sato T, Tanaka K. Vibronic coupling density analysis for α-oligothiophene cations: A new insight for polaronic defects. Chem Phys 2010. [DOI: 10.1016/j.chemphys.2010.03.014] [Citation(s) in RCA: 11] [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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Shizu K, Sato T, Tanaka K, Kaji H. Electron–vibration interactions in triphenylamine cation: Why are triphenylamine-based molecules good hole-transport materials? Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2009.12.075] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Yamada T, Kaji H. Planarity of triphenylamine moieties of a typical hole-transport material for OLEDs, N,N′-diphenyl-N,N′-di(m-tolyl)benzidine (TPD), in the amorphous state. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.02.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Vibronic Coupling Constant and Vibronic Coupling Density. SPRINGER SERIES IN CHEMICAL PHYSICS 2009. [DOI: 10.1007/978-3-642-03432-9_5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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