Dielectric relaxation studies in N-(4-octyloxy-2-hydroxybenzylidene)-4- carbethoxyaniline

Phase Transitions

Volumn 77, Issue 4, 2004, Pages 375-384

  Dhar, R ^a   Gupta, Meenal ^b   Agrawal, V K ^b   Singh, M K ^c   Singh, B ^c  

^a EWING CHRISTIAN COLLEGE   (India)

^b UNIVERSITY OF ALLAHABAD   (India)

^c BANARAS HINDU UNIVERSITY   (India)

Author keywords

Arrhenius plot; Dielectric relaxation; Permittivity and loss; Smectic A phase

Indexed keywords

ANISOTROPY; DIFFERENTIAL SCANNING CALORIMETRY; FREQUENCIES; MOLECULAR STRUCTURE; MOLECULES; NEMATIC LIQUID CRYSTALS; PERMITTIVITY; SMECTIC LIQUID CRYSTALS; TEMPERATURE DISTRIBUTION;

ARRHENIUS PLOT; CHIRALS; PERMITTIVITY AND LOSS; SMECTIC A PHASE;

DIELECTRIC RELAXATION;

EID: 11144342301     PISSN: 01411594     EISSN: None     Source Type: Journal    
DOI: 10.1080/01411590410001667617     Document Type: Article

References (25)

1. Bahadur, B. (1995). Ferroelectric LCDs. In: Bahadur, B. (Ed.), Liquid Crystals: Applications and Uses, Vol. 1, pp. 195-230. World Scientific, Singapore.
2. Baessler, H., Beard, R.B. and Labes, M.M. (1970). Dipole relaxation in liquid crystals. J. Chem. Phys., 52, 2292-2298.
3. Benguigui, L. (1979). J de Physique, 40, 705.
4. Böttcher, C.J.F. and Bordewijk, P. (1978). Theory of Electric Polarization, Vol. II. Elsevier, Amsterdam.
5. Dhar, R. (2004). An impedance model to improve the higher frequency limit of electrical measurements on the capacitor cell made from electrodes of finite resistances. Ind. J. Pure Appl. Phys., 42, 56-61.
6. Dhar, R., Srivastava, A.K. and Agrawal, V.K. (2003). Induced twisted grain boundary phases in the binary mixtures of a cholesteric and a nematic compound, Phase Transitions, 76, 959-974.
7. Differential scanning calorimeter (DSC-7) catalogue and literatures (1988). Perkin Elmer, Norwalk, Connecticut (USA).
8. Gouda, F.M. (1992). Dielectric Relaxation Spectroscopy of Chiral Liquid Crystals, a Ph. D. thesis submitted to Department of Physics. Chalmers University of Technology, Goteberg.
9. Hill, N.E., Vaughan, W.E., Price, A.H. and Davies, M. (1969). Dielectric Properties and Molecular Behaviour. Van Nostrand Reinhold Co, London.
10. Jeu, W.H. de, Goossens, W.J.A. and Bordewijk, P. (1974). Influence of smectic order on the static dielectric permittivity of liquid crystals. J. Chem. Phys., 61, 1985-1989.
11. Kresse, H. (1983). Dialectric behaviour of liquid crystals. In: Brown, G.H. (Ed.), Adv. In Liq. Cryst., Vol. 6, pp. 109-172. (Academic Press, New York).
12. Kunihisa, K.S. and Satomi, Y. (1986). Phase transition of cholesteryl acetylferulate. Mol. Cryst. Liq. Cryst., 141, 1-17.
13. Maier, W. and Meier, G. (1961). Z. Naturforsch, 16A, 262.
14. Nagabhushan, C., Nair, G.G., Ratna, B. R., Shashidhar, R. and Goodby, J.W. (1988). Dielectric studies of the hexatic B-smectic A and crystal B-smectic A transitions. Liq. Cryst., 3, 175-183.
15. Nozaki, R., Bose, T.K. and Yagihara, S. (1992). Dialectric relaxation of a reentrant nematic-liquid-crystal mixture by time domain reflectometry. Phys. Rev. A, 46, 7733.
16. Pandey, M.B., Dhar, R., Agrawal, V.K. and Dabrowski, R. (2004). Temperature dependence of dielectric behaviour of MHPB(H)PBC antiferroelectric liquid crystal. Mol. Cryst. Liq. Cryst. (in press).
17. Ratna, B.R., Shashidhar, R. and Rao, K.V. (1980). In: Chandrasekhar, S. (Ed.), Liquid Crystals, p. 135. Heyden, New York; also in Proc. Int. Liq. Cryst. Conf. 8th (1979), p. 137.
18. Ratna, B.R., Shashidhar, R. and Rao, K.V. (1980). In: Chandrasekhar, S. (Ed.), Liquid Crystals, p. 135. Heyden, New York; also in Proc. Int. Liq. Cryst. Conf. 8th (1979), p. 137.
19. Schacht, J., Zugenmaier, P., Buivydas, M., Komitov, L., Stebler, B., Lagerwall, S.T., Gouda, F. and Horii, F. (2000). Intermolecular and intramolecular reorientations in nonchiral smectic liquid-crystalline phases studied by broadband dielectric spectroscopy. Phys. Rev. E, 61, 3926-3935.
20. Singh, B., Singh, M.K., Dhar, R. and Srivastava, A.K. (2004). Synthesis, characterization and mesomorphic properties of N-(4-N-alkoxy-2- hydroxybenzylidene) carbethoxyaniline and their copper complexes. Proc. 19th Inst. Liq. Cryst. Conf., Edinburgh, UK (2002) to be published in Mol. Cryst. Liq. Cryst. (in press).
21. Srivastava, S.L. and Dhar, R. (1991). Characteristic time of ionic conductance and electrode polarization capacitance in some organic liquids by low frequency dielectric spectroscopy. Indian J Pure & Appl. Phys., 29, 745-751.
22. Srivastava, S.L. and Dhar, R. (1999). Study of liquid crystalline phases from temperature dependent dielectric constant. Indian J. Pure & Appl. Phys., 37, 891-898.
23. Srivastava, S.L., Dhar, R. and Kurik, M.V. (1993). Change in electrical and thermodynamical properties of cholesteryl myristate on irradiation. Mol. Mat., 2, 261-273.
24. Urban, S., Dabrowski, R., Gestblom, B. and Kocot, A. (2000). Dielectric relaxation studies of 6 OCB/8OCB mixtures with the nematic-smectic A-nematic re-entrant phase sequence. Liq. Cryst., 27, 1675-1681.
25. Urban, S., Gestblom, B. and Wurflinger (1999). Comparison of the dielectric relaxation data for the isotropic and nematic phases of three homologous series: nCb, nOCB and nPCH (n = 5-8). Mol. Cryst. Liq. Cryst., 331, 113-120.