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Titolo:
SYNTHESIS AND PHASE-BEHAVIOR OF CHIRAL LI QUID-CRYSTALLINE COMPOUNDS WITH THE STRUCTURE OF L-AMINO-ACID DERIVATIVE
Autore:
ZHANG XL; SHAN DQ; CAO LX; LIU QC; ZHUO RX;
Indirizzi:
WUHAN UNIV,DEPT CHEM WUHAN 430072 PEOPLES R CHINA WUHAN UNIV,CTR TEST WUHAN 430072 PEOPLES R CHINA
Titolo Testata:
Gaodeng xuexiao huaxue xuebao
fascicolo: 9, volume: 16, anno: 1995,
pagine: 1385 - 1390
SICI:
0251-0790(1995)16:9<1385:SAPOCL>2.0.ZU;2-U
Fonte:
ISI
Lingua:
CHI
Soggetto:
SPONTANEOUS POLARIZATION;
Keywords:
LIQUID CRYSTALLINE (LC); L-AMINO ACID; CHIRAL; SYNTHESIS; PHASE TRANSITION BEHAVIOR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
14
Recensione:
Indirizzi per estratti:
Citazione:
X.L. Zhang et al., "SYNTHESIS AND PHASE-BEHAVIOR OF CHIRAL LI QUID-CRYSTALLINE COMPOUNDS WITH THE STRUCTURE OF L-AMINO-ACID DERIVATIVE", Gaodeng xuexiao huaxue xuebao, 16(9), 1995, pp. 1385-1390

Abstract

Nine mesogenic compounds (I - III, IVa, b, V-a,V- b, VIa, b) with thestructure of L-amino acid derivative, four L-amino derivatives (A(1-4)) and six mesogenic compounds (M(1-6)) were synthesized. The chemicalstructure of new compounds (I - III, IVa, b, V-a,V- b, VIa, b, A(4) and M(3-6)) were confirmed by IR, H-1 NMR and elemental analysis. Theirphase behavior was also investigated by using differential scanning calorimetry (DSC) and polarizing microscopy, The resultis show that eight compounds (M(3-6), IVa, b, V-b and VIb) exhibit the liquid crystalline plase transtion temperatures, The specific rotation of the compounds was also determined, X-Ray diffraction had been used to investigatesmectic structure of two compounds, the results show that compounds (IVb, VIb) exhibit S-c and S-E* respectively. The hysteresis loop of IVb were determined, it is proved that VIb do have ferroelectricity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 18:04:51