POLYMORPHISM AND X-RAY-DIFFRACTION OF SOME CYANO BIPHENYL-SUBSTITUTED BENZOATES EXHIBITING REENTRANT NEMATIC PHASES

被引：42

作者：

HARDOUIN, F ^{[1
]}

LEVELUT, AM ^{[1
]}

TINH, NH ^{[1
]}

SIGAUD, G ^{[1
]}

机构：

[1] LAB PHYS SOLIDES,F-91405 ORSAY,FRANCE

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1979年 / 56卷 / 02期

关键词：

D O I：

10.1080/01406567908071964

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The polymorphism of the 4 cyano-biphenyl-4 prime -n-alkoxy benzoate esters is investigated and a reentrant nematic phase is observed for the n equals 8 and n equals 9 homologues. X-Ray studies confirm this fact and show that in the reentrant phase the cybotactic groups are S//A-like at high temperature near the S//A phase while they appear S//C-like at lower temperatures.

引用

页码：35 / 41

页数：7

共 9 条

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COATES, D
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[2] DUBOIS JC, 1978, NOUV J CHIM, V2, P647
[3] DUBOIS JC, 1976, J PHYS C SOLID STATE, V37, pC3
[4] MEASUREMENTS IN A PURE COMPOUND EXHIBITING AN ENANTIOTROPIC REENTRANT NEMATIC BEHAVIOR AT ATMOSPHERIC-PRESSURE
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[J]. SOLID STATE COMMUNICATIONS, 1979, 30 (05) : 265 - 269
[5] ENANTIOTROPIC NEMATIC REENTRANT BEHAVIOR AT ATMOSPHERIC-PRESSURE IN A PURE COMPOUND
HARDOUIN, F
SIGAUD, G
ACHARD, MF
GASPAROUX, H
[J]. PHYSICS LETTERS A, 1979, 71 (04) : 347 - 349
[6] HARDOUIN F, UNPUBLISHED
[7] STRUCTURE OF SMECTIC A PHASES OF COMPOUNDS WITH CYANO END GROUPS.
Leadbetter, A.J.
Frost, J.C.
Gaughan, J.P.
Gray, G.W.
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[J]. Journal de Physique (Paris), 1979, 40 (04): : 375 - 380
[8] TINH NH, 1979, CRYST LETT, V49, P287
[9] VRIES A, 1970, MOL CRYST LIQ CRYST, V10, P219

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