Induced smectic G phase through intermolecular hydrogen bonding

Citation
Pa. Kumar et al., Induced smectic G phase through intermolecular hydrogen bonding, LIQ CRYST, 26(9), 1999, pp. 1339-1343
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
LIQUID CRYSTALS
ISSN journal
0267-8292 → ACNP
Volume
26
Issue
9
Year of publication
1999
Pages
1339 - 1343
Database
ISI
SICI code
0267-8292(199909)26:9<1339:ISGPTI>2.0.ZU;2-A
Abstract
A new series of mesomorphic complexes formed through intermolecular hydroge n bonding between p-n-alkoxybenzoic acids (where alkoxy denotes chains from propoxy- to decyloxy- and dodecyloxy-) and non-mesogenic p-hydroxybutyl be nzoate, have been synthesized and characterized by thermal microscopy, diff erential scanning calorimetry, infrared spectroscopy (IR) and H-1 NMR studi es. A detailed IR spectral investigation in the solid state and in solution suggests that the acid and phenol groups are complementary to each other, each acting as both proton donor and proton acceptor. The results of compar ative thermal analyses of both free p-n-alkoxybenzoic acids and H-bonded co mplexes exhibited an induced crystal smectic G phase in the complexes throu ghout the series, its thermal range increasing with alkoxy carbon number.