Electron—molecular-vibration coupling in 7,7,8,8-tetracyano-p-Quinodimethane (TCNQ)

Lipari, N. O.; Bozio, Renato; Girlando, Alberto; Pecile, Cesare; Padva, A.

doi:10.1016/0009-2614(76)80498-8

Cited by 59 publications

(10 citation statements)

References 14 publications

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“…The gα values found by us can be compared with the gα determined by Steigmeier et al [7] and calculated by Lipari et al [14]. The gα values decrease monotonically when the temperature lowers.…”

Section: Resultssupporting

confidence: 74%

Application of the Dimer and Tetramer Models for Interpretation of the IR Spectra of TEA(TCNQ)₂

Olejniczak

Graja

1994

Acta Phys. Pol. A

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An interpretation of the IR polarized spectra of the organic quasi-one--dimensional semiconductor triethylammonium (TCNQ) 2 , between 80 and 300 K, is discussed in terms of the dimer and tetramer theories. It is concluded that the dimer model is acceptable only for describing high-T phase of TEA(TCNQ)2. The tetramer model is more adequate for an interpretation of the IR spectra of the salt within the large temperature range. It is also shown that the phase transition influences distinctly neither vibronic (electron-molecular vibration coupled) modes nor conformity of the experimental spectra with calculated ones according to the dimer or tetramer theory.

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Section: Resultssupporting

confidence: 74%

Application of the Dimer and Tetramer Models for Interpretation of the IR Spectra of TEA(TCNQ)₂

Olejniczak

Graja

1994

Acta Phys. Pol. A

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“…2c) shows that the Kondo resonance almost disappears due to the node in the wavefunction of the SOMO orbital, while two side bands around ± 45 mV come up. The origin of these peaks is an interplane molecular vibration of the central ring of the TCNQ molecule [27,28], which is strongly coupled to the SOMO. The dI/dV map of Fig.…”

Section: Resultsmentioning

confidence: 98%

Mapping spin distributions in electron acceptor molecules adsorbed on nanostructured graphene by the Kondo effect

et al. 2014

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“…In this context symmetry break means that the molecular units should not lie at the inversion centers. It was shown for one-dimensional systems that if the occupied molecular orbital is non-degenerate, the linear emv-coupling is possible only to the totally-symmetric a g vibrational modes of the molecule [68], which normally are infrared forbidden.…”

Section: Hmentioning

confidence: 99%

Comprehensive Optical Investigations of Charge Order in Organic Chain Compounds (TMTTF)2X

et al. 2012

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Charge ordering in the (TMTTF) 2 X salts with centrosymmetric anions (X = PF − 6 , AsF − 6 , SbF − 6 ) leads to a ferroelectric state around 100 K. For the first time and in great completeness, the intra-and intermolecular vibrational modes of (TMTTF) 2 X have been investigated by infrared and Raman spectroscopy as a function of temperature and pressure for different polarizations. In this original paper, we explore the development and amount of charge disproportionation and the coupling of the electronic degrees of freedom to the counterions and the underlying lattice. The methyl groups undergo changes with temperature that are crucial for the anion cage formed by them. We find that the coupling of the TMTTF molecules to the hexafluorine anions changes upon cooling and especially at the charge-order transition, indicating a distortion of the anion. Additional features are identified that are caused by the anharmonic potential. The spin-Peierls transition entails additional modifications in the charge distribution. To complete the discussion, we also add the vibrational frequencies and eigenvectors based on ab-initio quantum-chemical calculations.

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Electron—molecular-vibration coupling in 7,7,8,8-tetracyano-p-Quinodimethane (TCNQ)

Cited by 59 publications

References 14 publications

Application of the Dimer and Tetramer Models for Interpretation of the IR Spectra of TEA(TCNQ)₂

Application of the Dimer and Tetramer Models for Interpretation of the IR Spectra of TEA(TCNQ)₂

Mapping spin distributions in electron acceptor molecules adsorbed on nanostructured graphene by the Kondo effect

Comprehensive Optical Investigations of Charge Order in Organic Chain Compounds (TMTTF)2X

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Electron—molecular-vibration coupling in 7,7,8,8-tetracyano-p-Quinodimethane (TCNQ)

Cited by 59 publications

References 14 publications

Application of the Dimer and Tetramer Models for Interpretation of the IR Spectra of TEA(TCNQ)2

Application of the Dimer and Tetramer Models for Interpretation of the IR Spectra of TEA(TCNQ)2

Mapping spin distributions in electron acceptor molecules adsorbed on nanostructured graphene by the Kondo effect

Comprehensive Optical Investigations of Charge Order in Organic Chain Compounds (TMTTF)2X

Contact Info

Product

Resources

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Application of the Dimer and Tetramer Models for Interpretation of the IR Spectra of TEA(TCNQ)₂

Application of the Dimer and Tetramer Models for Interpretation of the IR Spectra of TEA(TCNQ)₂