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Chirality, Twist and Structures of Micellar Lyotropic Cholesteric Liquid Crystals in Comparison to the Properties of Chiralic Thermotropic Phases by Hans-Dieter Dörfler is a Materials Science article available to read on EtoBox.
What is Chirality, Twist and Structures of Micellar Lyotropic Cholesteric Liquid Crystals in Comparison to the Properties of Chiralic Thermotropic Phases about?
Phase chirality in disk-like lyotropic cholesteric phases (Ch(D)) was investigated, which was induced by addition of center and axial chiral dopants to achiral lyotropic nematic host phases (N(D)). In a lyotropic nematic matrix of the disk-like N(D) phase in the ternary system hexadecyldimethylethyl ammonium bromide (C16Me2EABr)/water/n-decanol, a disk-like lyotropic cholesteric phase Ch(D) was induced by addition of the axial optically active compound R(-)-1,1'-binaphthalene-2,2'-diyl-hydrogen-phosphate (BDP). The helical twisting power (HTP) of the BDP is generally lower than the HTP value of inducing substances with center chirality as cholesterol, prednisolone and taurocholic acid. At constant composition of the N(D) phase, the helix lengths were determined in dependence on the BDP and steroid concentration by means of evaluation of the 'spaghetti-like' texture using polarizing microscopy. The reciprocal helix lengths are changing linearly with rising BDP concentration. The properties of the Ch(D) phase (textures, helix lengths, structural parameters of the micelles) induced by the chiral compounds and changed by the composition of host phases can give information to the mechan
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It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- Hans-Dieter Dörfler
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0001-8686)
- Published
- 2002
- Language
- EN
- Field
- Materials Science (Physical Sciences)