Tris-Alkoxylphenylterpyridine Cobalt(II) Complexes: Synthesis, Structure, and Magnetic and Mesomorphic Behaviors

Springer Science and Business Media LLC - 2012
Young Hoon Lee1, Mohammad Razaul Karim1, Yukino Ikeda1, Tetsuya Shimizu1, Satoshi Kawata2, Akira Fuyuhiro3, Shinya Hayami4,1
1Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, Kumamoto, Japan
2Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma, Jonan-Ku, Japan
3Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Japan
4JST, CREST, Chiyoda-ku, Japan

Tóm tắt

Two novel cobalt(II) complexes [Co(L1)2](BF4)2·CH3CN·0.5H2O (1) and [Co(L2)2](BF4)2 (2) (L1 = 4′-(3,4,5-trimethoxy-phenyl)-[2,2′:6′,2″]terpyridine, L2 = 4′-(3,4,5-tris-hexadecyloxy-phenyl)-[2,2′:6′,2″]terpyridine) have been synthesized, and their structural, magnetic and mesomorphic properties were characterized by single crystal X-ray diffraction (XRD) analysis, temperature-dependent magnetic susceptibility, POM, DSC, and powder XRD analysis. The molecular structure of the complex 1 with short alkyl substituents exhibited that the metal ion has an N6 coordination sphere of distorted octahedral geometry and various intermolecular π–π interactions are important factors influencing the crystalline array. The magnetic behaviour of 1 displayed a typical of gradual spin transition for cobalt(II) terpyridine complexes. On the other hand, the complex 2 possessing linear long alkyl chains showed a gradual spin transition between low-spin and high-spin with a thermal hysteresis loop (T 1/2↑ = 338 and T 1/2↓ = 327 K) triggered by the crystal-to-mesophase transition. The powder XRD and POM analyses were indicative of the liquid crystalline lamellar phase of 2.

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Tài liệu tham khảo

A.B. Gaspar, V. Ksenofontov, M. Seredyuk, P. Gütlich, Coord. Chem. Rev. 249, 2661 (2005)

A.B. Gaspar, M. Seredyuk, P. Gütlich, Coord. Chem. Rev. 253, 2399 (2009)

P. Gütlich, H.A. Goodwin (eds.), Spin Crossover in Transition Metal Compounds. Topics in Current Chemistry, vol. 233–235 (Springer, Berlin, 2004)

A. Beni, A. Dei, M. Rizzitano, L. Sarace, Chem. Commun. 21, 2160 (2007)

J.L. Serrano, Metallomesogens (VCH, Weinheim, 1996) and references therein

Y. Bodenthin, G. Schwarz, Z. Tomkowicz, M. Lommel, T. Geue, W. Haase, H. Möhwald, U. Pietsch, D.G. Kurth, Coord. Chem. Rev. 253, 2414 (2009)

M. Seredyuk, A.B. Gaspar, V. Ksenofontov, Y. Galyametdinov, J. Kusz, P. Gütlich, J. Am. Chem. Soc. 130, 1431 (2008)

M. Seredyuk, A.B. Gaspar, V. Ksenofontov, Y. Galyametdinov, J. Kusz, P. Gütlich, Adv. Funct. Mater. 18, 2089 (2008)

S. Hayami, N. Motokawa, A. Shuto, N. Masuhara, T. Someya, Y. Ogawa, K. Inoue, Y. Maeda, Inorg. Chem. 46, 1789 (2007)

S. Hayami, K. Danjobara, K. Inoue, Y. Ogawa, N. Matsumoto, Y. Maeda, Adv. Mater. 16, 869 (2004)

Y. Galyametdinov, V. Ksenofontov, A. Prosvirin, I. Gvchinnikov, G. Ivanova, P. Gütlich, W. Haase, Angew. Chem. Int. Ed. Engl. 40, 4269 (2001)

S. Hayami, K. Danjobara, S. Miyazaki, K. Inoue, Y. Ogawa, Y. Maeda, Polyhedron 24, 2821 (2005)

T. Fujigaya, D–.L. Jiang, T. Aida, J. Am. Chem. Soc. 125, 14690 (2003)

T. Fujigaya, D–.L. Jiang, T. Aida, J. Am. Chem. Soc. 127, 5484 (2005)

M. Seredyuk, A.B. Gaspar, V. Ksenofontov, S. Reiman, Y. Galyametdinov, W. Haase, E. Rentschler, P. Gütlich, Chem. Mater. 18, 2513 (2006)

M. Seredyuk, A.B. Gaspar, V. Ksenofontov, Y. Galyametdinov, M. Verdaguer, F. Villian, P. Gütlich, Inorg. Chem. 47, 10232 (2008)

Y.H. Lee, Y. Komatsu, Y. Yamamoto, K. Kato, T. Shimizu, A. Ohta, T. Matsui, S. Hayami, Inorg. Chem. Commun. 14, 1498 (2011)

K. Kuroiwa, H. Kikuchib, N. Kimizuka, Chem. Commun. 46, 1229 (2010)

M. Seredyuk, A.B. Gaspar, V. Ksenofonotov, Y. Galyametdinov, M. Verdaguer, F. Villain, P. Gütlich, Inorg. Chem. 49, 10022 (2010)

Y. Bodenthin, U. Pietsch, H. Möhwald, D.G. Kurth, J. Am. Chem. Soc. 127, 3110 (2005)

Y. Bodenthin, G. Schwarz, Z. Tomkowicz, T. Geue, W. Haase, U. Pietsch, D.G. Kruth, J. Am. Chem. Soc. 131, 2934 (2009)

G. Schwarz, Y. Bodenthin, Z. Tomkowicz, W. Haase, T. Geue, J. Kohlbrecher, U. Pietsch, D.G. Kurth, J. Am. Chem. Soc. 133, 547 (2011)

S. Hayami, N. Motokawa, A. Shoto, R. Moriyama, N. Masuhara, K. Inoue, Y. Maeda, Polyhedron 26, 2375 (2007)

Y.H. Lee, A. Ohta, Y. Yamamoto, Y. Komatsu, K. Kato, T. Shimizu, H. Shinoda, S. Hayami, Polyhedron 30, 3001 (2011)

S. Hayami, Y. Komatsu, T. Shimizu, H. Kamihata, Y.H. Lee, Coord. Chem. Rev. 255, 1981 (2011)

S. Hayami, R. Moriyama, A. Shuto, Y. Maeda, K. Ohta, K. Inoue, Inorg. Chem. 46, 7692 (2007)

F. Cheng, A. Adronov, Chem. Eur. J. 12, 5053 (2006)

S. Tu, R. Jia, B. Jiang, J. Zhang, Y. Zhang, C. Yao, S. Ji, Tetrahedron 63, 381 (2007)

G.M. Sheldrick, SHELX97. Acta Cryst. A 64, 112 (2008)

Crystal Structure 4.0, Crystal Structure Analysis Package (Rigaku Corporation, Tokyo, 2000–2010)

F. Kröhnke, Synthesis 1 (1976)

I.G. Dance, M. Scudder, Cryst. Eng. Commun. 11, 2233 (2009)

E.A. Medlycott, G.S. Hanan, Chem. Soc. Rev. 34, 133 (2005)

S. Kremer, W. Henke, D. Reinen, Inorg. Chem. 21, 3013 (1982)

A.B. Gaspar, M.C. Muñoz, V. Niel, J.A. Real, Inorg. Chem. 40, 9 (2001)

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