Abstract
A semiflexible polysilane copolymer bearing 3,3,3-trifluoropropyl and n-decyl side chains formed an organogel in nonpolar organic solvents. Weak Si/FC interchain/intrachain interactions were formed between the Si main chain and fluoropropyl side chain, and acted as noncovalent crosslinks. Long alkyl (n-decyl) groups acted as solvophilic moieties that effectively absorbed and retained organic solvent molecules. Furthermore, the relatively rigid main chain was also important for the gelation ability of the material. The existence of Si/FC interchain interactions was first demonstrated by careful IR measurement and analysis using a model silane molecule. Hierarchical structures at the meso- and nano-scale levels were successfully characterized by AFM, cryo-HR-TEM, IR, and 19F{29Si}-NOE NMR experiments.
Similar content being viewed by others
Article PDF
References
Y. Osada and J.-P. Gong, Adv. Mater., 10, 827 (1998).
T. Ono, T. Sugimoto, S. Shinkai, and K. Sada, Nat. Mater., 6, 429 (2007).
M. Annaka, T. Tanaka, and Y. Osada, Macromolecules, 25, 4826 (1992).
S. Morita, T. Kawai, and K. Yoshino, J. Appl. Phys., 69, 4445 (1991).
G. R. Desiraju and T. Steiner, “The Weak Hydrogen Bond—In Structural Chemistry and Biology,” Oxford Univ Press, New York, 1999.
M. Nishio, M. Hirota, and Y. Umezawa, “The CH/π Interaction—Evidence, Nature, and Consequences,” Wiley-VCH, New York, 1998.
H. Matsuura, H. Yoshida, M. Hieda, S. Yamanaka, T. Harada, K. Shin-ya, and K. Ohno, J. Am. Chem. Soc., 125, 13910 (2003).
J. L. Alonso, S. Antolínez, S. Blanco, A. Lesarri, J. C. López, and W. Caminati, J. Am. Chem. Soc., 126, 3244 (2004).
P. Hobza and Z. Havlas, Chem. Rev., 100, 4253 (2000).
A. Y. Li, J. Chem. Phys., 126, 154102 (2007).
T. J. Lenk, R. L. Siemens, V. M. Hallmark, R. D. Miller, and J. F. Rabolt, Macromolecules, 24, 1215 (1991).
A. Saxena, R. Rai, S.-Y. Kim, M. Fujiki, M. Naito, K. Okoshi, and G. Kwak, J. Polym. Sci., Part A: Polym. Chem., 44, 5060 (2006).
A. Saxena, M. Fujiki, M. Naito, K. Okoshi, and G. Kwak, Macromolecules, 37, 5873 (2004).
S.-Y. Kim, A. Saxena, G. Kwak, M. Fujiki, and Y. Kawakami, Chem. Commun., 538 (2004).
N. Okamoto, F. Mukaida, H. Gu, Y. Nakamura, T. Sato, A. Teramoto, M. M. Green, C. Andreola, N. C. Peterson, and S. Lifson, Macromolecules, 29, 2878 (1996).
M. Fujiki, J. Am. Chem. Soc., 118, 7424 (1996).
A. Weissberger, “Organic Solvents,” 4th ed., Wiley, New York, (1986).
T. Dürrschmidt and H. Hoffmann, Colloid Polym. Sci., 279, 1005 (2001) and references therein.
T. Kunitake and N. Higashi, J. Am. Chem. Soc., 107, 692 (1985).
R. M. Overney, E. Meyer, J. Frommer, D. Brodbeck, R. Lüthi, L. Howald, H.-J. Güntherodt, M. Fujihira, H. Takano, and Y. Gotoh, Nature, 359, 133 (1992).
N. Yamada, T. Imai, and E. Koyama, Langmuir, 17, 961 (2001).
M. Suzuki, Y. Nakajima, M. Yumoto, M. Kimura, H. Shirai, and K. Hanabusa, Langmuir, 19, 8622 (2003).
M. Naito, N. Saeki, M. Fujiki, and A. Ohira, Macromolecules, 40, 648 (2007).
M. Fujino, T. Hisaki, and N. Matsumoto, J. Polym. Sci., Part A: Polym. Chem., 33, 2279 (1995).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kawabe, T., Naito, M. & Fujiki, M. Polysilane Organogel with Hierarchical Structures Formed by Weak Intra-/Inter-chain Si/FC and van der Waals Interactions. Polym J 40, 317–326 (2008). https://doi.org/10.1295/polymj.PJ2007173
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1295/polymj.PJ2007173