Induced crystal G phase through intermolecular hydrogen bonding VII. Influence of non-covalent interactions on mesomorphism and crystallization kinetics

Srinivasulu, M.; Satyanarayana, P.; Kumar, P. A.; Pisipati, V. G. K. M.

doi:10.1080/02678290110062231

Cited by 36 publications

(14 citation statements)

References 10 publications

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“…In the case of HBLCs the molecular frame possesses [10,[18][19][20][21][22] additional soft-covalent interaction. Further, in case of non-ferroelectric and ferroelectric HBLCs, the observed [13,21] variation in device relevant properties like thermal stability, spontaneous polarization, tilt angle, switching times etc., are addressed through dipolar and refined dipolar models to vouch the fact that soft-covalent interaction extends rather inclined to the long molecular dipole moment.…”

Section: Introductionmentioning

confidence: 99%

Experimental evidence of an optical shutter in cholesteric phase of a double hydrogen bonded liquid crystal

Vijayakumar¹,

Mohan²

2009

Braz. J. Phys.

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A novel series of double hydrogen bonded liquid crystals have been isolated. Hydrogen bond was formed between non mesogen chiral ingredient levo tartaric acid (LTA) and mesogenic undecyloxy benzoic acids (11BA) Thermal and electrical properties exhibited by levo tartaric acid and undecyloxy benzoic acid (LTA+11BA) were discussed. Interesting feature of the present investigation was observation of an optical shuttering action in LTA+11BA hydrogen bonded complex on application of a stipulated applied dc bias voltage. By enhancement of the dc bias voltage the mesogen behaves like an optical shutter, thus this hydrogen bonded complex mesogen acts as an effective light modulator. It was noticed that this action of shuttering was reversible, in the sense that when applied bias voltage was removed the original texture was restored. Experimental results relating to textures, optical tilt, dielectric studies and optical shuttering action were presented. This optical shutter property of the mesogen can be exploited for commercial and display device applications.

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Section: Introductionmentioning

confidence: 99%

Experimental evidence of an optical shutter in cholesteric phase of a double hydrogen bonded liquid crystal

Vijayakumar¹,

Mohan²

2009

Braz. J. Phys.

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“…The phase diagram of pure p-n-decyloxy benzoic acid is reported [15,23] to composed of two phases namely, Nematic and smectic C.…”

Section: Phase Diagram Of Pure P-n-decyloxy Benzoic Acidmentioning

confidence: 99%

“…The phase diagram of pure p-n-decyloxy benzoic acid is reported [23] while the 10OØn homologous series is constructed by taking into account the optical polarizing microscopic studies and the phase transition temperatures observed in the cooling run of the DSC thermogram. The phase diagram of pure p-n-decyloxy benzoic acid is reported [15,23] to composed of two phases namely, Nematic and smectic C.…”

Section: Phase Diagram Of Pure P-n-decyloxy Benzoic Acidmentioning

confidence: 99%

“…The central theme of this work is to study the physical and chemical properties of HBLC formed by alkyl and alkoxy carboxylic acids. With our previous experience [29][30][47][48][49][50][51][52][53][54][55][56][57] in designing, synthesizing liquid crystals and in continuation of our efforts to understand hydrogen bonded mesogens, eight such homologues series designated as mOØn (where n varied from 2 to 8 while m varied from 5 to 12, respectively) can be deduced with changing the alkyl and alkoxy carbon number. A systematic study for 12OØn and 11OØn homologues series has been carried out [58] by the authors.…”

Section: Introductionmentioning

confidence: 99%

“…Extensive work of hydrogen bonded liquid crystal by Kato and Frechet [8,9] opened a new chapter in synthesis, design and characterization of these mesogens which enables many young researchers to work in this field [23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

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