Synthesis and Evaluation of a Novel Liquid Crystalline Homologous Series: α-4-[4′-<i>n</i>-Alkoxy Cinnamoyloxy] Benzoyl-β-3″,4″-Dimethoxy Phenyl Ethylenes

Suthar, Deepak; Doshi, A. A.; Doshi, A. V.

doi:10.1080/15421406.2013.785812

Cited by 43 publications

(8 citation statements)

References 11 publications

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“…Number of homologous ester series with -CH=N-, -N=N-, -COO-CH 2 -, -CH=CH-CO-etc. central bridges have been reported till the date [13,14,15,16,17,18,19,20]. The results of novel investigation will be discussed and interpreted in terms of molecular rigidity and flexibility [21,22,23,24,25].…”

Section: Introductionmentioning

confidence: 93%

Molecular Flexibility of Longer n-Alkoxy Tail Group Operated Mesomorphism

Sharma

Patel

Jarodwala³

2015

ILCPA

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ABSTRACT.A novel homologous series RO-C 6 H 4 -CH=CH-COO-C 6 H 4 -CO-CH=CH-C 6 H 4 -OC 16 H 33 (n) para of chalconyl ester derivatives have been synthesized and studied with a view to understand and establish the effect of molecular structure on thermotropic liquid crystalline state of the substances and to provide novel liquid crystal (LC) materials to the researchers working in an unique multidisciplinary LC state of the substances. A novel chalconyl ester series consists of thirteen ( C 1 to C 18 ) homologues. C 5 to C 18 homologues are enantiotropically nematogenic without exhibition of smectogenic property, while the rest of the C 1 to C 4 homologues are nonliquid crystals (NLC). Transition temperatures and textures were determined by polarizing optical microscopy (POM) equipped with a heating stage. Textures of a nematic phase are threaded or schlieren. Cr-I/N and N-I transition curves of a phase diagram behaved in normal manner except negligible abnormality at C 14 homologue. Odd-even effect is exhibited by N-I transition curve. Analytical and Spectral data supported molecular structures of the homologues. Thermal stability for nematic is 97.33°C and the degree of mesomorphism vary maximum 24.0°C at C 5 homologue to minimum 11.0°C at C 10 homologue respectively. Latent transition temperatures (LTT) are determined for nonmesomorphic homologues C 4 (90°C) and C 3 (114°C) homologues by extrapolation method of transition curve. LC properties of a novel series are (thermometric) compared with structurally similar series.

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Section: Introductionmentioning

confidence: 93%

Molecular Flexibility of Longer n-Alkoxy Tail Group Operated Mesomorphism

Sharma

Patel

Jarodwala³

2015

ILCPA

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“…Hence, the unique LC materials may be useful for researchers in various branches of science and technology, other than chemistry, mainly for applications. A huge number of homologous series for liquid crystal properties have been reported [16][17][18][19][20]. Novel compounds will be synthesized through homologous series consisting central bridge (-COO-)with dye which consisting (-OH) group at the terminal end side.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Investigation of Mesomorphic Properties of Ester Linkage containing Compounds

Patel¹

2019

IJRASET

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A homologous series consisting-coo-central bridge liquid crystals has been synthesized and investigatedwith a vision to understanding and establishingthe effect of molecular structure in respect of molecular size, geometrical shape and polarizability on liquid crystalline properties. Unique series consisted of 12 members (C1-C16) of a series. Series consisting nematogenicandsmectogenic properties with respect to their carbon atoms. Novel members of series were selectively characterized and confirmed by elemental analysis, IR spectra, H1NMR spectra, DSC and POM.

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“…Thermometric data will be evaluated and interpreted in terms of molecular rigidity and flexibility [12,13,14,15] depending on molecular structure [16,17,18,19] and then mesomorphic properties and behaviours will be compared with structurally similar series. Number of ester homologous series with or without chalconyl group were studied and reported till the date [20,21,22,23,24,25,26,27,28]. Group efficiency order and structure relation with mesomorphism will be derived.…”

Section: Introductionmentioning

confidence: 99%

Study of Molecular Flexibility Operated Mesomorphism

Jain

Patel

2015

ILCPA

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Abstract. Homologous series RO-C 6 H 4 -CH=CH-COO-C 6 H 4 -CO-CH=CH-C 6 H 4 -OC 14 H 29 (P) of chalconyl novel derivatives have been synthesized and studied with a views to understand and establish the relation between molecular structure and the liquid crystal (LC) properties of thermotropic mesomorphs Series consists of thirteen homologues. Five homologues (C 1 to C 5 ) are nonliquid crystal (NLC) and the rest of the homologues (C 6 to C 18 ) are enantiotropically nematogenic without exhibition of smectic property. Transition temperatures and textures were determined by an optical polarizing microscope equipped with a heating stage (POM). Transition curves of a phase diagram(N-I and Cr-I/N) behaved in normal manner. N-I transition curve exhibited odd-even effect with negligible abnormality in its behaviour at the C 14 homologue. Thermal stability for nematic is 99.75 0 C.The degree of mesomorphism vary minimum 19 0 C at the C 6 homologue to maximum 28 0 C at the C 8 homologue. Analytical and spectral data confirms the molecular structures of the novel homologues. Evaluated thermal data of present novel series are compared with other structurally similar homologous series. Textures of Nematic phase are threded or schlieren.

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Synthesis and Evaluation of a Novel Liquid Crystalline Homologous Series: α-4-[4′-n-Alkoxy Cinnamoyloxy] Benzoyl-β-3″,4″-Dimethoxy Phenyl Ethylenes

Cited by 43 publications

References 11 publications

Molecular Flexibility of Longer n-Alkoxy Tail Group Operated Mesomorphism

Molecular Flexibility of Longer n-Alkoxy Tail Group Operated Mesomorphism

Synthesis and Investigation of Mesomorphic Properties of Ester Linkage containing Compounds

Study of Molecular Flexibility Operated Mesomorphism

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