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Spectroscopic Studies of Chemical Reactions and Dynamics in Sol-Gel Matrices

Published online by Cambridge University Press:  21 February 2011

F. Akbarian ,
B. Dunnt ,
P.D. Fuquat ,
J. Mckiernan ,
E. Simoni  and
J.I. Zink
F. Akbarian
Affiliation:
Department of Chemistry and Biochemistry
B. Dunnt
Affiliation:
Department of Materials Science and EngineeringUniversity of California, Los Angeles 90024
P.D. Fuquat
Affiliation:
Department of Materials Science and EngineeringUniversity of California, Los Angeles 90024
J. Mckiernan
Affiliation:
Department of Chemistry and Biochemistry
E. Simoni
Affiliation:
Department of Chemistry and Biochemistry
J.I. Zink
Affiliation:
Department of Materials Science and EngineeringUniversity of California, Los Angeles 90024
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Abstract

The synthesis of sol-gel glasses containing organic and organometallic molecular dopants has been well established as an approach for creating new optical materials. Some of these properties are dependent upon chemical reactions which occur in porous xerogel matrices during the sol-gel process or when encapsulated molecules are exposed to other molecules in solution. In this paper, the study of two different types of chemical reactions in the pores of xerogel matrices is reported. In one case copper phthalocyanine is used to characterize dimerization within the pores. The results show that dimer formation is most likely to occur towards the end of the drying stage as the dye concentration in the pores increases from solvent evaporation. A second example involves the use of a pump-probe technique to determine the rate of proton recombination inside the pores of silica monoliths. The behavior of sols and gels is similar to aqueous solution while recombination of protons in the xerogel seems to be affected by the walls of the pores.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 559
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

1 Avnir, D., Braun, S. and Ottolenghi, M., in ACS Symp. Series 499, in Supramolecular Architecture, edited by Bein, T. (American Chemical Society, Washington, D.C., 1992) pp. 384–404.Google Scholar
2 Dunn, B. and Zink, J.I., J. Mater. Chem. 1,903–913 (1991).Google Scholar
3 Reisfeld, R. and Jorgensen, C.K. in Structure and Bonding. Vol. 77, edited by Reisfeld, R. and Jorgensen, C.K. (Springer-Verlag, Geneva, 1992) pp. 207–256.Google Scholar
4 Avnir, D., Braun, S., Lev, O., Levy, D. and Ottolenghi, M. in Sol-Gel Optics: Processing and Applications, edited by Klein, L.C. (Kluwer Academic, Boston, 1994) pp. 539–582.Google Scholar
5 Ellerby, L., Nishida, C., Nishida, F., Yamanaka, S., Dunn, B., Valentine, J.S. and Zink, J.I., Science 255, 1113 (1992).Google Scholar
6 Avnir, D., Levy, D. and Reisfeld, R., J. Phys. Chem., 88, 5956 (1984).Google Scholar
7 Fuqua, P.D., Mansour, K., Alvarex, D., Marder, S.R., Perry, J.W. and Dunn, B., Proc. SPJE Conf. on Sol-Gel Optics II. vol. 1758, edited by Mackenzie, J.D. (SPIE, Bellingham WA) pp. 499–506.Google Scholar
8 Lever, A.P.B., in Advances in Inorganic Chemistry and Radiochemistry. edited by Emeleus, H.J. and Sharpe, A.G. (Academic Press, New York, 1965) pp. 27–114 Google Scholar
9 Balgrove, R.J. and Gruen, L.C., Aust. J. Chem. 25, 2553 (1972).Google Scholar
10 Snow, A.W. and Jarvis, N.L., J. Am. Chem. Soc, 106, 4706 (1984).Google Scholar
11 Abel, E.W., Pratt, J.M. and Whelan, R., J.C.S. Dalton, 509 (1976).Google Scholar
12 Schnabel, E., Nöther, H. and Kuhn, H., in Recent Progress of Natural and Synthetic Colouring Matters and Related Fields, edited by Gore, T.S. (Academic Press, New York, 1962) pp. 561–572.Google Scholar
13 Gaspard, S., Verdaguer, M. and Viovy, R., J. Chem. Res., 3072 (1979).Google Scholar
14 Esquivas, L. and Zarzycki, J., in Proceedings of the Third International Conference on Ultrastructure Processing (John Wiley, New York, 1988) pp. 255–270 Google Scholar
15 Pouxviel, J.C., Dunn, B. and Zink, J.I., J. Phys. Chem. 93, 2134 (1989).Google Scholar
16 Gutman, M., Huppert, D. and Pines, E., J. Am. Chem. Soc, 103, 3710 (1981).Google Scholar
17 Pines, E. and Huppert, D., J. Phys. Chem., 87, 4471 (1983).Google Scholar
18 Kaufman, V.R., Avnir, D., Pines- Rojanski, D., Huppert, D., J. Non-Cryst. Solids 99, 379 (1988)Google Scholar
19 McKiernan, J., Simoni, E., Dunn, B. and Zink, J.I., J. Phys. Chem., 98, 1006 (1994).Google Scholar
20 Durakpasa, H., Breiter, M.W. and Dunn, B., Electrochim. Acta, 38, 371 (1993).Google Scholar
21 Feng, S., Tsai, M. and Greenblatt, M., Chem. Mater., 4, 388 (1992).Google Scholar
22 Brodka, A. and Zerda, T.W., J. Phys. Chem., 97, 5676 (1992).Google Scholar
23 Förster, Th. and Volker, S., Chem. Phys. Lett., 34, 1, (1975).Google Scholar
24 Ravaine, D., Traore, J., Klein, L.C., Schwartz, I., Proc. Mat. Res. Soc. Symp. 32, 139 (1984)Google Scholar