Origin of the Director Tilt in the Lyotropic Smectic C* Analog Phase: Hydration Interactions and Solvent Variations.
Origin of the Director Tilt in the Lyotropic Smectic C* Analog Phase: Hydration Interactions and Solvent Variations.
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溶致层列相*模拟相中导向倾斜的起源:水合相互作用和溶剂变化
DOI:
10.1002/cphc.201500673
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
F. Giesselmann
中科院分区:
文献类型:
--
作者:
J. R. Bruckner;F. Knecht;F. Giesselmann
The origin and long‐range correlation of the director tilt in the recently discovered phase, which is the lyotropic analog of the thermotropic smectic C* (SmC*) liquid crystalline phase, are investigated. Polarized micro‐Raman spectroscopy reveals that the director tilt in the phase originates from a tilting of the aromatic 2‐phenylpyrimidine cores of the surfactant molecules. Optical measurements of the tilt angle show that its magnitude decreases with increasing solvent concentration, suggesting that the long‐range inter‐lamellar correlation of the tilt directions is reduced at increasing thickness of the solvent layers. The phase diagrams with four different solvents (water, formamide,N‐methylformamide,N,N‐dimethylformamide) are investigated, showing that the phase is only formed with those solvents that exhibit a dense network of hydrogen bonds. This observation suggests that these hydrogen bond networks play an essential role in the long‐range correlation of the director tilt between adjacent surfactant layers. To verify this assumption, mixtures with deuterated solvents are investigated, showing that the tilt angle in the phase is indeed reduced by this modification of the solvent′s hydrogen bond network.
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DOI:
10.1021/j100071a009
发表时间:
1994-05
期刊:
The Journal of Physical Chemistry
影响因子:
--
作者:
A. Mortensen;O. Nielsen;J. Yarwood;V. Shelley
通讯作者:
A. Mortensen;O. Nielsen;J. Yarwood;V. Shelley
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
S. Suhai
通讯作者:
S. Suhai
DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
R. Kjellander;S. Marčelja
通讯作者:
S. Marčelja
影响因子:
16.6
作者:
Bruckner, Johanna R.;Porada, Jan H.;Giesselmann, Frank
通讯作者:
Giesselmann, Frank
影响因子:
2.2
作者:
M. Schafheutle;H. Finkelmann
通讯作者:
H. Finkelmann