Induced Smectic-G Phase Through Intermolecular Hydrogen Bonding, Part XIII: Impact of a Nematogen on Phase Behaviour of Hydrogen-Bonded Liquid Crystals

The complexes oxo (1,1,8,8-tetraethyl-3,6-diazaoctane-1,8-dithiolato)rhenium[ ReO ( tedadt )], oxo (1,1,8,8-tetraethyl-4,4-dimethyl-3,6-diazaoctane-1,8-dithiolato)rhenium [ ReO ( tedmdadt )] and (1,1,4,4,8,8-hexamethyl-3,6-diazaoctane-1,8-dithiolato) oxorhenium [ ReO ( hmdadt )] were prepared. The crystal structure of the complex ReO ( tedadt ) was determined by X-ray crystallography to be a hydrogen-bonded dimer . This is the first example of intermolecular hydrogen bonding in rhenium diamino dithiolate ( dadt ) complexes.

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Synthesis and Self-Assembly of Donor−Spacer−Acceptor Molecules. Liquid Crystals Formed by Single-Component “Complexes” via Intermolecular Hydrogen-Bonding Interaction

Macromolecules ◽

10.1021/ma047999l ◽

2005 ◽

Vol 38 (5) ◽

pp. 1684-1690 ◽

Cited By ~ 45

Author(s):

Jianwei Xu ◽

Cher Ling Toh ◽

Xueming Liu ◽

Shaofeng Wang ◽

Chaobin He ◽

...

Keyword(s):

Hydrogen Bonding ◽

Liquid Crystals ◽

Self Assembly ◽

Single Component ◽

Intermolecular Hydrogen Bonding ◽

Hydrogen Bonding Interaction ◽

Intermolecular Hydrogen Bonding Interaction ◽

Bonding Interaction ◽

Acceptor Molecules

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Intermolecular hydrogen bonding as an aid to the preferential exhibition of the smectic C phase in troponoid liquid crystals

Liquid Crystals ◽

10.1080/02678299308027758 ◽

1993 ◽

Vol 14 (3) ◽

pp. 821-827 ◽

Cited By ~ 19

Author(s):

A. Mori ◽

H. Takeshita ◽

R. Nimura ◽

M. Isobe

Keyword(s):

Hydrogen Bonding ◽

Liquid Crystals ◽

Intermolecular Hydrogen Bonding ◽

Smectic C

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Induced Smectic-G Phase through Intermolecular Hydrogen Bonding Part IX: Comparative Thermal and Phase Behaviour Studies on Two Distinct Structural Isomers Possessing Linear and Bow Shapes

Zeitschrift für Naturforschung A ◽

10.1515/zna-2001-0915 ◽

2001 ◽

Vol 56 (9-10) ◽

pp. 692-696

Author(s):

Swathi Pisupati ◽

P. A. Kumar ◽

V. G. K. M. Pisipati

Keyword(s):

Phase Transition ◽

Hydrogen Bonding ◽

Carbon Number ◽

Thermal Studies ◽

Phase Behaviour ◽

Cooh Group ◽

Intermolecular Hydrogen Bonding ◽

Structural Isomers ◽

Smectic A ◽

Transition Studies

Abstract Two novel intermolecular hydrogen bonding mesogenic series comprising two distinct structural iso mers nABA:R:nABA and «ABA:H:«ABA (where R = resorcinol; H = hydroquinone; nABA = p-n-al-kyloxybenzoic acid with the alkyl carbon number varying from propyl-to decyl-and dodecyl-) have been synthesized using resorcinol and hydroquinone as central bent and linear cores, respectively. The thermal and phase behaviour of these complexes is studied by thermal microscopy and differential scan ning calorimetry. The IR spectral data confirm the formation of intermolecular hydrogen bonding between the OH group of the non-mesogen and -COOH group of the nABA moiety. Thermal studies reveal the existence of new phases: smectic-A and smectic-G. Comparative phase transition studies suggest that these isomers exhibit a different trend of mesomorphism.

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