Liquid Crystal Dimers

Imrie, Corrie T.

doi:10.1007/3-540-68118-3_4

Cited by 230 publications

(106 citation statements)

References 143 publications

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“…Thus, the present study will add some novel LC substances which can be useful to the researchers working in the field of Liquid crystals with different aims and objects. Thus, present study is aimed to synthesize novel LC substances to understand and establish the effects molecular structure [20,22] on LC properties and evaluated data; will be interpreted in terms of molecular rigidity and flexibility. [23,26] …”

Section: Introductionmentioning

confidence: 99%

Mesomorphism Dependence on Molecular Rigidity Flexibility of Ester Compounds

Chauhan¹

2017

WJPR

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A Novel homologous series of mesogens have been synthesized and studied with a views to understand and establish the relations between molecular structure and liquid crystal properties of a Compounds.Totally eleven members of series synthesized. Mesogenic behaviors commences from C 6 member of a series and continued up to C 16 member. The rest of the members C 1 to C 5 are nonmesogenic.Mesogenic homologues ( C 6 to C 16 ) are enantiotropically nematogenic.

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Section: Introductionmentioning

confidence: 99%

Mesomorphism Dependence on Molecular Rigidity Flexibility of Ester Compounds

Chauhan¹

2017

WJPR

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“…[2,3,4,5,6,7]. Present proposed investigation is planned with a view to understand and establish the effect of molecular structure on thermo tropic LC properties [8,9,10,11] of laterally substitutedBr group at the middle phenyl ring as a consequence of molecular rigidity and flexibility [12,13,14,15]. Number of chalconyl ester homologous series have been reported till the date [16,17,18,19,20,21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Study of the Effects of Lateral Substitution (Bromo) on Mesomorphic Behaviours of Chalconyl Ester Derivatives

Solanki

Patel

2016

ILCPA

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Novel homologous series: RO-C 6 H 4 -COO-C 6 H 3 -Br-CO-CH=CH-C 6 H 4 -OC 18 H 3 (n) (ortho bromo to -COO-) is synthesized and studied with a view to understand and establish the relation between mesomorphic properties and the molecular structure with reference to lateral substitution of bromine -Br at middle phenyl ring. Chalconyl homologous series consists of thirteen homologues between (C 1 to C 18 ). Nematogenic mesomorphism commences from C 5 homologue and continues up to C 18 homologue in enantiotropic manner. Transition and melting points were determined by an optical polarizing microscopy (POM) equipped with a heating stage. Textures of nematic phase are threaded or schlieren. Transition curve Cr-N/I behaved in normal manner. N-I transition curve exhibited odd-even effect up to C 8 homologue. It (N-I) rises and fall with negligible deviations from its normal descending tendency which appears in case of homologues C 10 to C 18 . Thermal stability for nematic is 142.89 °C and the mesophase lengths vary minimum 8.0 °C to maximum 26.0 °C at the C 7 and C 8 homologue respectively. Liquid Crystal properties of present series are evaluated and compared with structurally analogous series and relative group efficiency order derived. Thus, present series is predominantly nematogenic with absence of Smectic property. Analytical and spectral data supported moleculars of homologues. Introduction:

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“…Thus, present investigation is planned with a views to understand and establish the effects of molecular structure [9,10,11,12] on thermotropic mesomorphism and to avail the novel chalconyl derivatives to the pharma and medicinal chemist for the study of antimicrobial activity in lyotropic condition for the benefit of mankind. Hence, chalconyl ester derivatives consisting of three phenyl rings bonded through -CH=CH-COO-and -CO-CH=CH-central groups and two flexible terminal end groups viz.…”

Section: Introductionmentioning

confidence: 99%

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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Liquid Crystal Dimers

Cited by 230 publications

References 143 publications

Mesomorphism Dependence on Molecular Rigidity Flexibility of Ester Compounds

Mesomorphism Dependence on Molecular Rigidity Flexibility of Ester Compounds

Study of the Effects of Lateral Substitution (Bromo) on Mesomorphic Behaviours of Chalconyl Ester Derivatives

Molecular Flexibility of Longer n-Alkoxy Tail Group Operated Mesomorphism

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