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| 11. |
Determination of the Pitch of a Cholesteric Liquid Crystal by Infrared Transmission Measurements |
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Molecular Crystals,
Volume 6,
Issue 3-4,
1969,
Page 419-422
H. Baessler,
M.M. Labes,
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摘要:
The pitch of a cholesteric liquid crystal can be inferred from (1) the distance of the Grandjean lines in a wedge tylpe sample1; (2) the angular dependence of Bragg-scattering,2and (3> the wavelength of maximum reflection.3The present paper reports a simple method for determining the pitch based on transmission measurement. It can be particularly valuable in the infrared, i.e. a pitch range of about 0.5 to 5μ, where reflectance measurements are difficult
ISSN:0369-1152
DOI:10.1080/15421407008083477
出版商:Taylor & Francis Group
年代:1969
数据来源: Taylor
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| 12. |
Calorimetric Study on Some Anthracene Photodimers |
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Molecular Crystals,
Volume 6,
Issue 3-4,
1969,
Page 423-426
G. Guarini,
P. Sarti-fantoni,
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PDF (132KB)
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摘要:
Calorimetric data referring to dimers of anthracene, 9-CN-anthracene, 9-Cl-anthracene, 1-Cl-anthracene and 9-anthraldehyde are reported. Values for heat of melting for monomers are listed.
ISSN:0369-1152
DOI:10.1080/15421407008083478
出版商:Taylor & Francis Group
年代:1969
数据来源: Taylor
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| 13. |
Polymorphism of the Crystalline Methylcholoromethane Compounds, II |
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Molecular Crystals,
Volume 6,
Issue 3-4,
1969,
Page 427-429
Reuben Rudman,
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PDF (121KB)
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摘要:
A single crystal X-ray diffraction study, based on results obtained from differential scanning calorimetry, showed that methylchloroform and 2, 2-dichloropropane behave in a manner similar to carbon tetrachloride.
ISSN:0369-1152
DOI:10.1080/15421407008083479
出版商:Taylor & Francis Group
年代:1969
数据来源: Taylor
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| 14. |
On the Fluorescence of 9-Cyanoanthracene |
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Molecular Crystals,
Volume 6,
Issue 3-4,
1969,
Page 431-433
P. Sarti-fantoni,
R. Teroni,
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PDF (128KB)
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摘要:
The polarized green fluorescence of 9-cyancanthracene crystals is reanalysed and found to be structured. The green emission is progressively weakened by irradiation, and becomes replaced by a blue fluorescence.
ISSN:0369-1152
DOI:10.1080/15421407008083480
出版商:Taylor & Francis Group
年代:1969
数据来源: Taylor
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| 15. |
Radical Recombination in γ-Irradiated Anthracene |
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Molecular Crystals,
Volume 6,
Issue 3-4,
1969,
Page 435-437
H. Ringel,
W.B. Whitten,
A.C. Damask,
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PDF (118KB)
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摘要:
Recent studies of electron paramagenetic resonance in γ-irradiated anthracene1–4indicate that the origin of the EPR signal is a radical in which the unpaired electron is coupled to three nearly equivalent protons. Harrah and Hughes2and Inoue3have proposed that the dibenzocyclohexadienyl radical, formed by the addition of one extra hydrogen atom to the 9 or 10 position of an anthracene molecule, gives rise to the observed spectrum. From the annealing kinetics of the EPR signal, McGhieet al.5conclude that a bimolecular reaction is the dominant mechanism for radical recombination.
ISSN:0369-1152
DOI:10.1080/15421407008083481
出版商:Taylor & Francis Group
年代:1969
数据来源: Taylor
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Volume 6 issue 3-4