Glass transitions in the stable crystalline states of dibenzofuran and fluorene

Fujita, Hiroaki; Fujimori, Hiroki; Oguni, Masaharu

doi:10.1006/jcht.1995.0098

Cited by 19 publications

(8 citation statements)

References 16 publications

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“…Fig. 1, which is a 'T g -scaled Arrhenius plot', is adapted from the work of Brand et al [4] by inclusion of additional cases of higher [5] and lower [6] fragility than the group of substances considered by those authors. Fig.…”

Section: Orientationally Decoupled Systemsmentioning

confidence: 99%

Highly decoupled ionic and protonic solid electrolyte systems, in relation to other relaxing systems and their energy landscapes

Mizuno

Bélières

Kuwata³

et al. 2006

Journal of Non-Crystalline Solids

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Section: Orientationally Decoupled Systemsmentioning

confidence: 99%

Highly decoupled ionic and protonic solid electrolyte systems, in relation to other relaxing systems and their energy landscapes

Mizuno

Bélières

Kuwata³

et al. 2006

Journal of Non-Crystalline Solids

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“…The temperature dependence of the relaxation times follows the Arrhenius law. The enthalpy relaxation process is exponential and the relaxation function is linear with respect to the jump [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

³⁵Cl NQR in Glassy Crystal of 2-chlorothiophene

Fujimori

Asaji

2000

Zeitschrift Für Naturforschung A

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Stable crystalline 2-chlorothiophene has two glass transitions at 164 and 186 K. 35CI NQR measurements were carried out between 77 and 200 K. Two NQR signals with full widths of about 100 kHz at half maximum were observed in this temperature range. The spin-lattice relaxation times Ti were measured at the two peak frequencies. The activation energy obtained from the results of the T\ measurements showed a fairly good agreement with those estimated from calorimetric measurements.

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“…§ §The fluorene molecule in the solid state shows a well-known phase transition, which has been studied by thermal analysis and spectroscopy. 36 Due to the structural disorder of the present complexes, the same behaviour can be supposed to be present also in these systems. However, the presence and the type of the CN-containing electron withdrawing counterpart can influence this phenomenon.…”

Section: Discussionmentioning

confidence: 84%

Synthesis, structural and spectroscopic study of the donor–acceptor complexes between fluorene and D_2hcyano molecular building blocks

et al. 2003

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Three solid molecular complexes of fluorene with electron-withdrawing tetracyanoethylene, 1,2,4,5tetracyanobenzene and 7,7,8,8-tetracyanoquinodimethane were synthesized. Single-crystal X-ray diffraction data elucidated the order-disorder aspects of the crystal structures ascribed to the different molecular symmetries of the employed building blocks. This hypothesis was confirmed by the structural and energetic results of ab initio periodic calculations. Donor-acceptor solid state interactions between molecular counterparts have been highlighted by electron and vibrational IR and Raman solid state spectroscopy, indicating a significant extent of electron density transfer from the fluorene unit towards the cyano-molecules. The experimental evidences of donor-acceptor interactions between molecular counterparts were compared to the lattice energies and solid state band-gaps, obtained by periodic calculations, and to the cluster HOMO-LUMO differences, obtained by isolated cluster calculations. A good agreement between spectral and theoretical data was found.

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Glass transitions in the stable crystalline states of dibenzofuran and fluorene

Cited by 19 publications

References 16 publications

Highly decoupled ionic and protonic solid electrolyte systems, in relation to other relaxing systems and their energy landscapes

Highly decoupled ionic and protonic solid electrolyte systems, in relation to other relaxing systems and their energy landscapes

³⁵Cl NQR in Glassy Crystal of 2-chlorothiophene

Synthesis, structural and spectroscopic study of the donor–acceptor complexes between fluorene and D_2hcyano molecular building blocks

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Glass transitions in the stable crystalline states of dibenzofuran and fluorene

Cited by 19 publications

References 16 publications

Highly decoupled ionic and protonic solid electrolyte systems, in relation to other relaxing systems and their energy landscapes

Highly decoupled ionic and protonic solid electrolyte systems, in relation to other relaxing systems and their energy landscapes

35Cl NQR in Glassy Crystal of 2-chlorothiophene

Synthesis, structural and spectroscopic study of the donor–acceptor complexes between fluorene and D2hcyano molecular building blocks

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³⁵Cl NQR in Glassy Crystal of 2-chlorothiophene

Synthesis, structural and spectroscopic study of the donor–acceptor complexes between fluorene and D_2hcyano molecular building blocks