Synthesis, Characterization, and Dilatometric Studies on N-(p-n-Alkoxybenzylidene)-p-n-pentyloxyanilines Compounds

Ajeetha, N.; Pisipati, V. G. K. M.; Rao, M. Ramakrishna Nanchara; Prasad, P.V. Datta

doi:10.1080/15421400500447108

Cited by 31 publications

(21 citation statements)

References 22 publications

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“…The position of the oxygen atom in the terminal chain varied from either side of the core, the oxygen atom is introduced on both sides, and the oxygen is removed from the terminal chain. The observed values are discussed in the light of earlier data available on Schiff's base nO.m compounds [7]. …”

Section: Introductionmentioning

confidence: 79%

Role of Oxygen on Phase Behaviour of Benzylidene Aniline – A Comparative Study

Ajeetha¹,

Ojha²

2009

Zeitschrift Für Naturforschung A

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Four structurally related Schiff's base compounds are synthesized and their mesogenic properties are characterized by using Thermal Microscopy (TM) and Differential Scanning Calorimetry (DSC). The position of oxygen is varied from either sides of the bridging site, oxygen introduced on both sides and the oxygen is removed from the bridging site for the values of n = 8 and m = 5. The influence of oxygen atom to the extent of increase in thermal range, depression in melting temperature, elevation of clearing temperature is observed for all four compounds, viz. N (p-n-Octyloxy benzylidene) p-n-Pentyl aniline (8O.5), N (p-n-Octyl benzylidene) p-n-Pentyloxy aniline (8.O5), N (p-n-Octyloxy benzylidene) p-n-Pentyloxy aniline (8O.O5), and N (p-n-Octyl benzylidene) p-nPentyl aniline (8.5). The shift in the position of oxygen from the aldehyde to the aniline side and the removal of oxygen has a greater effect as they become room temperature liquids, whereas the oxygen on the aldehyde side and the oxygen on both sides of the rigid core moiety effect only the clearing temperatures. The results obtained are discussed in the light of the earlier data available on Schiff's base nO.m compounds.

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Section: Introductionmentioning

confidence: 79%

Role of Oxygen on Phase Behaviour of Benzylidene Aniline – A Comparative Study

Ajeetha¹,

Ojha²

2009

Zeitschrift Für Naturforschung A

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“…The values of n ¼ 8 and m vary from 3 to 7. The results are compared with the data available on nO.m compounds [6,7].…”

Section: Introductionmentioning

confidence: 97%

Influence of Oxygen on Phase Behavior of N(p-n-Octyloxy Benzylidene)p-n-Alkoxy Anilines: A Comparative Study

Ajeetha¹,

Ojha²

2009

Molecular Crystals and Liquid Crystals

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The N (p-n-octyloxy benzylidene) p-n-alkoxy anilines (8O.Om) compounds were synthesized, and the mesomorphic properties were characterized by using thermal microscopy (TM) and differential scanning calorimetry (DSC) for m ¼ 3 to 7. The nematic (N), smectic-C (S C ), and smectic-G (S G ) phases are the more commonly observed in these compounds. The smectic-A (S A ) and smectic-B (S B ) phases are observed only in the 8O.O5 compound. The influence of oxygen on phase behavior of the 8O.Om compounds is compared with the data available on nO.m compounds.

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“…The nature of molecular interactions in LC compounds can be studied from different phase transformations and pretransitional effects [1]. Further, the study of thermo dynamical, anharmonic and acoustical parameters provide information regarding the physico-chemical behavior of the molecules.…”

Section: Introductionmentioning

confidence: 99%