NOVEL SERIES OF ENAMINOKETONE LIQUID-CRYSTALS HAVING HEXATIC SMECTIC-B PHASE

被引：24

作者：

PYZUK, W

KROWCZYNSKI, A

GORECKA, E

机构：

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1993年 / 237卷

关键词：

LIQUID CRYSTALS; PHASE TRANSITIONS; SMECTIC-B HEXATIC PHASE;

D O I：

10.1080/10587259308030125

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Several homologous series of liquid crystals having an aminoketone mesogenic core (Liq. Cryst., 10, 593 (1991)), have been synthesized to derive some new wide-temperature untilted smectics. Compounds belonging to three of six novel series have the hexatic smectic B phase between smectic A and enantiotropic crystal smectic B phases. Eleven of them exhibit first order phase transition between smectic B phases, whereas for other compounds this phase transition is not detectable neither by DSC nor texture studies. Molecular modifications leading to further untitled hexatic compounds are suggested.

引用

页码：75 / &

共 14 条

[1] MULTICRITICALITY IN HEXATIC LIQUID-CRYSTALS [J].

AHARONY, A ;

BIRGENEAU, RJ ;

BROCK, JD ;

LITSTER, JD .

PHYSICAL REVIEW LETTERS, 1986, 57 (08) :1012-1015

[2]

GALYAMETDINOV YG, 1991, ZH OBSHCH KHIM+, V61, P234

[3] HEXATIC AND CRYSTAL PHASE-TRANSITIONS IN THIN FREESTANDING LIQUID-CRYSTAL FILMS [J].

GEER, R ;

STOEBE, T ;

HUANG, CC ;

PINDAK, R ;

SRAJER, G ;

GOODBY, JW ;

CHENG, M ;

HO, JT ;

HUI, SW .

PHYSICAL REVIEW LETTERS, 1991, 66 (10) :1322-1325

[4] CHARACTERIZATION OF THE HEXATIC-B AND CRYSTAL B-PHASES BY OPTICAL MICROSCOPY [J].

GOODBY, JW ;

PINDAK, R .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1981, 75 (1-4) :233-247

[5] A COMPOUND EXHIBITING A CRYSTAL-B TO HEXATIC-B PHASE-CHANGE [J].

GOODBY, JW .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1981, 72 (2-3) :95-99

[6]

Gray GW., 1984, SMECTIC LIQUID CRYST

[7] STUDY OF THE SMECTIC-A TO HEXATIC SMECTIC-B TRANSITION IN THE BINARY-SYSTEM NORMAL-HEXYL-4'-NORMAL-PENTYLOXYBIPHENYL-4-CARBOXYLATE AND 4-PROPIONYLPHENYL-TRANS(4-NORMAL-PENTYL)CYCLOHEXANE CARBOXYLATE [J].

MAHMOOD, R ;

LEWIS, M ;

BIGGERS, R ;

SURENDRANATH, V ;

JOHNSON, D ;

NEUBERT, ME .

PHYSICAL REVIEW A, 1986, 33 (01) :519-524

[8] EFFECT OF THE HEXATIC-B TEMPERATURE-RANGE ON THE NATURE OF THE SMECTIC-A HEXATIC-B PHASE-TRANSITION [J].

NOUNESIS, G ;

GEER, R ;

LIU, HY ;

HUANG, CC ;

GOODBY, JW .

PHYSICAL REVIEW A, 1989, 40 (09) :5468-5471

[9] X-RAY-OBSERVATION OF A STACKED HEXATIC LIQUID-CRYSTAL B-PHASE [J].

PINDAK, R ;

MONCTON, DE ;

DAVEY, SC ;

GOODBY, JW .

PHYSICAL REVIEW LETTERS, 1981, 46 (17) :1135-1138

[10] SMECTIC-A-HEXATIC-B TRANSITION OF VARIOUS COMPOUNDS IN THE HOMOLOGOUS SERIES OF N-ALKYL-4'-N-ALKOXYBIPHENYL-4-CARBOXYLATE [J].

PITCHFORD, T ;

NOUNESIS, G ;

DUMRONGRATTANA, S ;

VINER, JM ;

HUANG, CC ;

GOODBY, JW .

PHYSICAL REVIEW A, 1985, 32 (03) :1938-1940

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