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

[1] LIQUID-CRYSTAL PROPERTIES OF SOME CYANO-SUBSTITUTED ARYL ESTERS [J].

COATES, D ;

GRAY, GW .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1976, 37 (1-4) :249-262

[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 [J].

HARDOUIN, F ;

SIGAUD, G ;

ACHARD, MF ;

GASPAROUX, H .

SOLID STATE COMMUNICATIONS, 1979, 30 (05) :265-269

[5] ENANTIOTROPIC NEMATIC REENTRANT BEHAVIOR AT ATMOSPHERIC-PRESSURE IN A PURE COMPOUND [J].

HARDOUIN, F ;

SIGAUD, G ;

ACHARD, MF ;

GASPAROUX, H .

PHYSICS LETTERS A, 1979, 71 (04) :347-349

[6]

HARDOUIN F, UNPUBLISHED

[7] STRUCTURE OF SMECTIC A PHASES OF COMPOUNDS WITH CYANO END GROUPS. [J].

Leadbetter, A.J. ;

Frost, J.C. ;

Gaughan, J.P. ;

Gray, G.W. ;

Mosley, A. .

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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