Lyotropic liquid-crystalline phase behavior of some alkyltrimethylphosphonium bromides

被引:8
|
作者
Pindzola, BA [1 ]
Gin, DL [1 ]
机构
[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
关键词
D O I
10.1021/la000121c
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The lyotropic liquid crystal (LLC) behavior of a homologous series of alkyltrimethylphosphonium bromide salts is described. While alkyltrimethylammonium salts are common LLC mesogens that have served in mesoporous materials, phase-transfer catalysis, and polymer-surfactant assemblies, the LLC behavior of the analogous phosphonium salts has been relatively unexplored. Dodecyl- (C12TMPB), tetradecyl-(C14TMPB), and hexadecyltrimethylphosphonium bromide (C16TMPB) were found to exhibit hexagonal, lamellar, and cubic mesophases similar to their ammonium counterparts; however, there is a key difference: Changing to a phosphorus-based headgroup appears to stabilize the cubic phase of C12TMPB and C14TMPB such that the phases extend down to room temperature. Some trends in the lattice parameters of the resulting LLC phases of the alkyltrimethylphosphonium bromides with respect to phase composition and temperature are also discussed. Finally, preliminary use of P-31 NMR spectroscopy, as a method of structural characterization of the phases, showed variation in the peak widths for the different phases but not the expected chemical shift anisotropy seen in the more commonly studied phosphate-based systems; an explanation for this difference is proposed.
引用
收藏
页码:6750 / 6753
页数:4
相关论文
共 50 条
  • [21] PHASE-TRANSITION IN IONIC LIPIDS IN LYOTROPIC LIQUID-CRYSTALLINE STATE
    TYAGI, RS
    SHUKLA, GG
    MISHRA, RK
    STUDIA BIOPHYSICA, 1976, 55 (02): : 123 - 129
  • [22] KINETICS OF LIQUID CRYSTALLIZATION FOR LYOTROPIC LIQUID-CRYSTALLINE POLYMERS
    LIN, JP
    WU, HR
    LI, SJ
    POLYMER INTERNATIONAL, 1994, 34 (02) : 141 - 144
  • [23] LIQUID-CRYSTALLINE BEHAVIOR OF SOME AZOBENZENE DYES
    CAMPBELL, D
    DIX, LR
    ROSTRON, P
    DYES AND PIGMENTS, 1995, 29 (01) : 77 - 83
  • [24] PHASE-BEHAVIOR OF LYOTROPIC LIQUID-CRYSTALLINE SIDE-CHAIN POLYMERS IN AQUEOUS-SOLUTIONS
    FINKELMANN, H
    LUHMANN, B
    REHAGE, G
    COLLOID AND POLYMER SCIENCE, 1982, 260 (01) : 56 - 65
  • [25] LYOTROPIC LIQUID-CRYSTALLINE PHASE-BEHAVIOR OF A MONOMERIC AND A POLYMERIC MONOSACCHARIDE AMPHIPHILE IN AQUEOUS-SOLUTION
    FINKELMANN, H
    SCHAFHEUTLE, MA
    COLLOID AND POLYMER SCIENCE, 1986, 264 (09) : 786 - 790
  • [26] ON THEORY OF ATHERMAL LYOTROPIC LIQUID-CRYSTALLINE SYSTEMS
    BIRSHTEIN, TM
    KOLEGOV, BI
    PRYAMITSIN, VA
    VYSOKOMOLEKULYARNYE SOEDINENIYA SERIYA A, 1988, 30 (02): : 348 - 354
  • [27] LYOTROPIC LIQUID-CRYSTALLINE PHASE-BEHAVIOR AND STRUCTURE OF CESIUM NORMAL-TETRADECANOATE WATER MIXTURES
    BLACKBURN, JC
    KILPATRICK, PK
    JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1992, 149 (02) : 450 - 471
  • [28] LYOTROPIC LIQUID-CRYSTALLINE OLIGOMERS FOR MOLECULAR COMPOSITES
    HOYT, AE
    HUANG, SJ
    BENICEWICZ, BC
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1993, 205 : 60 - POLY
  • [29] ELECTROPHYSICAL PROPERTIES OF LYOTROPIC LIQUID-CRYSTALLINE SYSTEMS
    NESRULLAEV, AN
    RUSTAMOV, FA
    COLLOID JOURNAL OF THE USSR, 1989, 51 (04): : 673 - 676
  • [30] Lyotropic Liquid-Crystalline Phases of Sophorolipid Biosurfactants
    Saci, Fella
    Roelants, Sophie L. K. W.
    Soetaert, Wim
    Baccile, Niki
    Davidson, Patrick
    LANGMUIR, 2022, 38 (28) : 8564 - 8574