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Volumn 20, Issue 43, 2010, Pages 9658-9665

Bent-core mesogens with thiophene units

Author keywords

[No Author keywords available]

Indexed keywords

ALKYL CHAIN; ANTIFERROELECTRIC SWITCHING; AROMATIC CORES; BIPHENYLDIOL; BITHIOPHENES; END-GROUPS; MESOGENS; MESOPHASE STRUCTURES; POLARIZING MICROSCOPY; SMECTIC PHASIS; TRANSITION TEMPERATURE; XRD;

EID: 78049336617     PISSN: 09599428     EISSN: 13645501     Source Type: Journal    
DOI: 10.1039/c0jm01919d     Document Type: Article
Times cited : (19)

References (68)
  • 30
    • 78049344638 scopus 로고    scopus 로고
    • n-Butyl bromide formed in the halogen-metal exchange reaction with n-BuLi can act as an electrophile and hence it competes with the alkyl bromide (RBr) used for introduction of the alkyl chain. Though this can be avoided by using two equivalents of t-BuLi, using the metallation reaction is more convenient
    • n-Butyl bromide formed in the halogen-metal exchange reaction with n-BuLi can act as an electrophile and hence it competes with the alkyl bromide (RBr) used for introduction of the alkyl chain. Though this can be avoided by using two equivalents of t-BuLi, using the metallation reaction is more convenient.
  • 31
    • 78049338314 scopus 로고    scopus 로고
    • Whereas the 5-alkylthiophene-2-carboxylic acids do not show LC phases, the dodecyl-2,2′-dithiophene-5-carboxylic acid forms a broad mesomorphic region with an enantiotropic SmC and nematic phase; transitions: Cr 109 SmC 135 N 149 Iso (°C)
    • Whereas the 5-alkylthiophene-2-carboxylic acids do not show LC phases, the dodecyl-2,2′-dithiophene-5-carboxylic acid forms a broad mesomorphic region with an enantiotropic SmC and nematic phase; transitions: Cr 109 SmC 135 N 149 Iso (°C).
  • 46
    • 78049346506 scopus 로고    scopus 로고
    • However, the highly birefringent texture seen for the pristine sample before applying an electric field (Fig. 2a) is difficult to explain with an anticlinic tilt correlation and suggests a predominately synclinic phase structure. Probably, field induced alignment has a significant influence on tilt correlation
    • However, the highly birefringent texture seen for the pristine sample before applying an electric field (Fig. 2a) is difficult to explain with an anticlinic tilt correlation and suggests a predominately synclinic phase structure. Probably, field induced alignment has a significant influence on tilt correlation.
  • 61
    • 78049339505 scopus 로고    scopus 로고
    • FE phase in Fig. 7
    • FE phase in Fig. 7.
  • 65
    • 63049088751 scopus 로고    scopus 로고
    • Bent-core molecules with oligo(phenylene ethinylene) units can also be considered as π-conjugated cores, but in most of the reported compounds long lateral alkyl chain was attached to these cores and this leads to the formation of nematic phases, for example see: M. Lehmann J. Seltmann A. A. Auer E. Prochnow U. Benedikt J. Mater. Chem. 2009 19 1978 1988
    • (2009) J. Mater. Chem. , vol.19 , pp. 1978-1988
    • Lehmann, M.1    Seltmann, J.2    Auer, A.A.3    Prochnow, E.4    Benedikt, U.5


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.