1. Part of this work was presented at the China-Japan Bilateral Symposium on Langmuir-Blodgett Films, Beijing, P.R. China, Nov. 1990.
2. K. Toth, E. Lindner, M. Horvath, J. Jeney, I. Bitter, B. Agai, T. Meisel, and L. Toke:Anal. Lett. 22, 1185 (1989).
3. H-Y. An, Y-J. Wu, Z-J. Zhang, R. M. Izatt, and J. S. Bradshaw:J. Incl. Phenom. 11, 303 (1991).
4. S. S. M. Hassan and E. M. Elnemma:Anal. Chem. 61, 2189 (1989).
5. H-Y. An, Y-J. Wu, L-F. Shen, H-Z. Yuan, and J-Q. Qiu:Youji Huaxue (Organic Chemistry)4, 275 (1986);Chem. Abstr. 107, 216982x (1988); 5. (b) Y-J. Wu, H-Y. An, J-C. Tao, J. S. Bradshaw, and R. M. Izatt:J. Incl. Phenom. 9, 267 (1990).