Molecular Flexibility Operated Mesomorphism

• Autorzy: Marathe R. B. , Vyas N. N. , Doshi A. V.

Identyfikatory

DOI

10.18052/www.scipress.com/ILCPA.52.163

• Języki publikacji: EN

Abstrakty

EN

Novel homologous series: RO-CNsub>6H₄-CH=CH-COO-CH₂-C₆H₄-Br (p) synthesized and studied with a view to understand and establish the effects of molecular structure on liquid crystal (LC) behavior of a series. Series consists of eleven homologues. C₁ to C₇ members of a novel series are non-liquid crystals. Mesomorphism commences from Octyloxy (C₈) homologue and continued upto hexadecyloxy homologue (C₁₆) as enantiotropic nematic without exhibition of smectic property. The textures of a nematic phase are threaded or Schlieren. Transition temperatures (table-2) and textures are determined by an optical polarizing microscopy equipped with a heating stage. Cr-N/I and N-I transition curve behaved in normal manner in phase diagram, showing their phase behavior (figure-1). Odd-even effect is absent for N-I transition curve. Analytical and spectral data confirmed the molecular structures of a series. The LC properties are compared with the structurally similar series. The transition temperatures are relatively lower than the corresponding n-alkoxy benzoic acid. Thus, present novel series is partly nematogenic with absence of smectic property whose mesogenic phase length is low and of low ordered melting type. Thermal stability for nematic is 93.0°C and the mesophaselength ranges from 8 to 21°C. Keywords : Mesomorphism; Nematic; enantiotropy; Liquid Crystal; Smectic

Słowa kluczowe

EN

Mesomorphism; Nematic; enantiotropy; Liquid Crystal; Smectic

• Wydawca: Przedsiębiorstwo Wydawnictw Naukowych "DARWIN"
• Czasopismo: International Letters of Chemistry, Physics and Astronomy
• Rocznik: 2015
• Tom: Vol. 52
• Strony: 163--171
• Opis fizyczny: Bibliogr. 30 poz., rys., tab., wz.

Twórcy

autor

Marathe R. B.

• Huntsman International India Pvt. Ltd, Umraya village, Taluka: Padra, Vadodara-391 440, Gujarat, India, Dr. K.N. Modi University, Newai, Dist. Tonk, Rajasthan-304021

autor

Vyas N. N.

• P.T. Arts and Science College, Godhara

autor

Doshi A. V.

• Dr. K.N. Modi University, Newai, Dist. Tonk, Rajasthan-304021

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