314059-01-3Relevant academic research and scientific papers
Induction of chirality by doping mesogens with non-mesogenic chiral dopant
Prajapati, Ashish K.,Patel, Niraj S.,Lad, Vijay G.
, p. 41 - 51 (2007/10/03)
Use of chiral dopant in binary mixtures to induce ferroelectricity/chiral nematic phase is an easier way than the synthesis of ferroelectric or chiral nematic materials. Number of researchers have tried to induce chirality in the achiral mesogens by doping it with naturally occurring chiral compounds or their derivatives. Few binary systems were studied where one of the components is the non-mesogenic chiral dopant. In almost all the systems studied cholesteric phase (N*) is induced with lowering in transition temperatures. The study provides means to induce chirality in mesogenic system by doping it with the derivative of naturally occurring chiral menthol.
Synthesis of a new mesogenic homologous series containing naphthalene moiety
Prajapati, Ashish K.
, p. 65 - 72 (2007/10/03)
A new series of mesogenic Schiff's base esters, 4-(4′-n-Alkoxybenzoyloxy) 3-methoxy benzylidene 2″-aminonaphthalenes has been synthesized. The synthesized compounds were characterised by elemental analysis and standard spectroscopic methods. All the homologues synthesized exhibit mesomorphism. The mesomorphic properties of the present series are compared with other structurally related series. Chiral nematic mesophase (N*) is induced in the system by doping a derivative of naturally occurring chiral compound.
EFFECT OF LATERAL SUBSTITUTION ON MESOMORPHISM: (A) 4(4 prime -N-ALKOXYBENZOYLOXY)-3-METHOXY BENZALDEHYDES (B) 4(4 prime -N-ALKOXYBENZOYLOXY)-3-METHOXY BENZYLIDENE-4 double prime -TOLUIDINES (C) 4(4 prime -N-ALKOXYBENZOYLOXY)-3-METHOXY BENZYLIDENE-4 double prime -ANISIDINES.
Vora,Gupta
, p. 119 - 127 (2007/10/02)
Three homologous series, having a lateral substituent and different end groups have been synthesized. Series (A) is non-mesogenic while series (B) and (C) exhibit only nematic mesophase. The thermal stabilities of series (B) and (C) are much more lowered compared with the corresponding unsubstituted homologous series. Generally the introduction of a lateral substituent renders the system low melting, and the mesomorphic-isotropic transition temperatures are also lowered. However, in the present study, introduction of a bulky methoxy group as a lateral substituent lowers the mesomorphic-isotropic transition temperatures to a great extent but the melting points are not much depressed.
