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Mesomorphic Studies on a Series of Nickel (II) Centered Aromatic Complexes Displaying Liquid Crystalline Phases

DOI: 10.4236/wjcmp.2022.123004, PP. 27-37

Keywords: Columnar, Mesomorphic, Nematic, Discotic, Metallomesogens, Polarized Optical Microscopy, Differential Scanning Calorimetry

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Abstract:

Two new series (A & B) of three materials each based on the aroyl hydrazinato-nickel (II) complex were synthesized and characterized. The core molecule in these series consists of two 4-benzoyloxy benzylidene moieties and two benzene rings attached at the azomethine moiety. These latter benzene rings have one or two alkoxy chains comprised of either 10, 12, 16 or 18 carbon atoms. The characterization of these two series by polarized optical microscopy and differential scanning calorimetry is described herein. Upon cooling from the Isotropic phase, three of the six materials display a monophasic columnar phase and the other three possess a biphasic nematic and columnar phases. Upon heating, all six materials have a clearance point at high temperatures without displaying mesomorphic behavior. In series B mesogens, it was observed that the longer the hydrocarbon tail length, the lower the clearance point.

References

[1]  Wang, L., Huang, D., Lam, L. and Cheng, Z. (2017) Bowlics: History, Advances and Applications. Liquid Crystals Today, 26, 85-111.
https://doi.org/10.1080/1358314X.2017.1398307
[2]  Yeh, P. and Gu, C. (2010) Optics of Liquid Crystal Displays. John Wiley & Sons, Hoboken.
[3]  Chandrasekhar, S., Sadashiva, B.K. and Suresh, K.A. (1977) Liquid Crystals of Disc-Like Mole Cules. Pramana, 9, 471-480.
https://doi.org/10.1007/BF02846252
[4]  Sergeyev, S., Pisula, W. and Geerts, Y.H. (2007) Discotic Liquid Crystals: A New Generation of Organic Semiconductors. Chemical Society Reviews, 36, 1902-1929.
https://doi.org/10.1039/b417320c
[5]  Demus, D., Goodby, J., Gray, G.W., Spiess, H.W. and Vill, V. (1988) Handbook of Liquid Crystals. Vols. 1-3, Wiley-VCH, Weinheim.
[6]  Collings, P.J. and Hird, M. (1997) Introduction to Liquid Crystals. Taylor & Francis, London.
https://doi.org/10.4324/9780203211199
[7]  Li, W.R., Kao, K.C., Yo, Y.C. and Lai, C.K. (1999) Liquid-Crystalline Properties of Unsaturated Piperazine-2,5-Dione Derivatives. Helvetica Chimica Acta, 82, 1400-1407.
https://doi.org/10.1002/(SICI)1522-2675(19990908)82:9<1400::AID-HLCA1400>3.0.CO;2-0
[8]  Lai, C.K., Ke, Y.C., Su, J.C. and Li, W.R. (2010) Heterocyclic 1,3,4-Oxadiazole as Columnar Core. Liquid Crystals, 29, 915-920.
https://doi.org/10.1080/02678290210129957
[9]  Chien, C.W., Liu, K.T. and Lai, C.K. (2011) Heterocyclic Columnar Pyrimidines: Synthesis, Characterization and Mesomorphic Properties. Liquid Crystals, 31, 1007-1017.
https://doi.org/10.1080/02678290410001713342
[10]  Battacharjee, C.R., Das, G. and Mondal, P. (2011) Photoluminescent Hemidisc-Shaped Liquid Crystalline Nickel (II) Schiff-Base Complexes. European Journal of Inorganic Chemistry, 35, 5390-5396.
https://doi.org/10.1002/ejic.201100679
[11]  Ohta, K., Higashi, R., Ikejima, M., Yamamoto, I. and Kobayashi, N. (1998) Disk-Like Liquid Crystals of Transition Metal Complexes. Journal of Materials Chemistry, 8, 1979-1991.
https://doi.org/10.1039/a800897c
[12]  Serrano, J.L. (1996) Metallomesogens: Synthesis, Properties and Applications. Wiley-VCH, Weinheim.
[13]  Glebowska, A., Przybylski, P., Winek, M., Krzyczkowaska, A., Krowczynski, Z., Szydlowska, D., Pociecha, E. and Gorecka, J. (2009) Fluorinated Metallomesogens-Lamellar versus Columnar Phase Formation. Journal of Materials Chemistry, 19, 1395-1398.
https://doi.org/10.1039/b819165d
[14]  Ohta, K., Akimoto, H., Fujimoto T. and Yamamoto, I. (1994) Rod-Like Liquid Crystals of Organic Transition-Metal Complexes. Part 4.—Optically Positive Uniaxial Nematic Phase in the bis[1-(4’-alkoxybiphenyl-4-yl)-3-alkylpropane-1,3-dionato]Copper(II) Complexes. Journal of Materials Chemistry, 4, 61-69.
https://doi.org/10.1039/JM9940400061
[15]  Heinrich, B., Praefcke, K. and Guillon, D. (1997) Structural Study of Columnar Liq uid-Crystalline Phases in Homologous Series of Tetrapalladium Organyls. Journal of Materials Chemistry, 7, 1363-1372.
https://doi.org/10.1039/a606600c
[16]  Aubert, V., Guerchais, V., Ishow, E., Hoang, K.T., Ledoux, I., Nakatani, K., Bozec, L. H. (2008) Efficient Photoswitching of the Nonlinear Optical Properties of Dipolar Photochromic Zinc(II) Complexes. Angewandte Chemie, 120, 587-590.
https://doi.org/10.1002/ange.200704138
[17]  Sagara, Y., Yamane, S., Mutai, T., Araki, K. and Kato, T. (2009) A Stimuli-Responsive, Photoluminescent, Anthracene-Based Liquid Crystal: Emission Color Determined by Thermal and Mechanical Processes. Advanced Functional Materials, 19, 1869-1875.
https://doi.org/10.1002/adfm.200801726
[18]  Xavier, A. and Srividhya, N. (2014) Synthesis and Study of Schiff Base Ligands. Journal of Applied Chemistry, 7, 6-15.
https://doi.org/10.9790/5736-071110615
[19]  Zoubi, W.A. (2013) Biological Activities of Schiff Bases and Their Complexes. International Journal of Organic Chemistry, 3, 73-95.
https://doi.org/10.4236/ijoc.2013.33A008
[20]  Jabbi, A.M., Aliyu, H., Isyaku, S. and Kabir, A. (2020) Preparation, Characterization and Antimicrobial Studies of Mn(II) and Fe(II) Complexes with Schiff Base Ligand Derived from 2-aminophenol and 3-formyl-2-hydroxy-6-methoxyquinoline. Open Journal of Inorganic Chemistry, 10, 15-24.
https://doi.org/10.4236/ojic.2020.102003
[21]  Mostafa, M. (2021) Comparative Studies of Some Novel Cu(II) Polymeric Complexes Derived from Cyanoacetylhydrazine. The Role of Solvents Used on the Structure and Geometry of the Isolated Cu2+ Complexes. Open Journal of Inorganic Chemistry, 11, 111-130.
https://doi.org/10.4236/ojic.2021.114008
[22]  Gimenez, R., Lydon, D.P. and Serrano, J.L. (2002) Metallomesogens, a Promise or a Fact? Current Opinion in Solid State and Materials Science, 6, 527-535.
https://doi.org/10.1016/S1359-0286(03)00009-3
[23]  Abser, M. N., Karim, M. M., Kauser, A., Parvin, R., Molla, M.E., Yeasmin, Z., Zoghaib, W.M., Al-Rawahi, Z., Carboni, C. and Al-Saidi, G. (2013) Synthesis and Characterization of bis[n-(4-benzoyloxy) Benzylidene{n(n-di/tri-alkoxy)benzoyl}-hydrazinato]Nickel(II) Complexes Displaying Liquid Crystalline Columnar Phases. Molecular Crystals and Liquid Cystals, 571, 9-18.
https://doi.org/10.1080/15421406.2012.726008
[24]  Chung, K.L., Chun-Hsien, T. and Yung-Shyen, P. (1998) Discotic Metallomesogens: Mesophase Crossover of Columnar Rectangular to Hexagonal Arrangements in bis(hydrazinato)Nickel(II) Complexes. Journal of Materials Chemistry, 8, 1355-1360.
https://doi.org/10.1039/a800657a
[25]  Abser, M.N., Bellwood, M., Holmes, M.C. and McCabe, R.W. (1993) Aroylhydrazinatonickel(II) and Copper(II) Complexes; A New Class of Metallomesogens. Journal of the Chemical Society, Chemical Communications, 12, 1062-1063.
https://doi.org/10.1039/c39930001062

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