Positive and negative ionochromism and UV sensor properties of oxygen-containing polysilanes

Abstract

Addition of lithium trifluoromethanesulfonate (LiOTf) to poly[(4-ethoxyethoxybutyl)octylsilylene] (PEBOS) prevents the normal thermochromic transition to longer wavelength (negative ionochromism), whereas addition LiOTf to poly[bis(5-ethoxyethoxypentyl)silylene] (PEEPS) induces a thermochromic transition (positive ionochromism); the latter effect is reversed in the presence of water or THF vapour, so that LiOTf-doped PEEPS serves as a UV sensor for H₂O or THF.

References

1. I. Levesque and M. Leclerc, J. Chem. Soc., Chem. Commun., 1995, 2293; Chem. Mater., 1995, 8, 2843cf. R. D. McCullough and S. P. Williams, Chem. Mater., 1995, 7, 2001.
2. M. J. Marsella, R. J. Newland, P. J. Carroll and T. M. Swager, J. Am. Chem. Soc., 1995, 117, 9842.
3. R. West, in Comprehensive Organometallic Chemistry II, ed. E. W. Abel, F. G. A. Stone and G. Wilkinson, Pergamon, Oxford, 1995, vol. 2, pp. 77–109; R. D. Miller and J. Michl, Chem. Rev., 1989, 89, 1359; R. West, in J. E. Mark, H. R. Allcock and R. West, Inorganic Polymers, Prentice Hall, Englewood Cliffs, NJ, 1992, ch. 5, pp. 186–23.
4. S. S. Bukalov, L. A. Leites, R. West and T. Asuke, Macromolecules, 1996, 29, 907; K. S. Schweitzer, J. Chem. Phys., 1986, 85, 1156, 1176.
5. M. Fujino, T. Hiaki and N. Matsumoto, Macromolecules, 1995, 28, 5017.
6. K. Song, H. Kuzmany, G. M. Wallraff, R. D. Miller and J. F. Rabolt, Macromolecules, 1990, 23, 3870.
7. K. Oka, N. Fujiue, T. Dohmaru, C.-H. Yuan and R. West, J. Am. Chem. Soc., 1997, 119, 4074.
8. K. Oka, N. Fujiue, S. Nakanishi, T. Takata, T. Dohmaru, C.-H. Yuan and R. West, Chem. Lett., 1995, 875.
9. C.-H. Yuan and R. West, Macromolecules, 1993, 26, 2645.
10. A. Wendsjø, J. O. Thomas and J. Lindgren, Polymer, 1993, 34, 2243.