Dye adsorption on self-assembled silane monolayers: optical absorption and modeling

Abstract

A comparative study has been carried out on the adsorption of the Rhodamine 6G dye on glass slides covered with self assembled monolayers of phenyltrichlorosilane and uncoated plain glass. Optical absorption measurements indicate enhancement of the amount of dye adsorbed on silane coated glass as compared to uncoated glass, possibly due to the interaction of the phenyl group in the silane molecule with the dye. Experiments also indicate the formation of dimers of Rhodamine 6G and that the coverage of the dye on the silane modified surface is preferentially as monomers when compared to uncoated glass. Molecular modeling studies on this system support these results.

References

1. M. C. Petty, Endeavour, New Ser., 1983, 7, 65.
2. S. R. Wasserman, H. Biebuyck and G. M. Whitesides, J. Mater. Res., 1989, 4, 886.
3. V. V. Tsukruk and V. N. Bliznyuk, Langmuir, 1998, 14, 446.
4. Jpn. Pat., Kokai Tokkyp Koho JP 08225773 A2, 3 Sept., 1996, Heisei, 4 pp, Japan.
5. L. DeQuan, M. A. Ratner, T. J. Marks, C. H. Zhang, J. Yang and G. K. Wong, J. Am. Chem. Soc., 1990, 112, 7389.
6. S. Masayuki, O. Haruhiko, A. Masahika and N. Yoichi, Maku, 1994, 19, 332.
7. J. B. Brzoska, I. B. Azouz and F. Rondelez, Langmuir, 1994, 10, 4373.
8. L. DeQuan, B. C. Thomas and S. Brasil, Chem. Mater., 1994, 6, 803.
9. Z. Huang, P. C. Wang, A. G. Mac Diarmid, Y. Xia and G. Whitesides, Langmuir, 1997, 13, 6480.
10. R. H. Tredgold, J. Mater. Chem., 1995, 5, 1095.
11. A. J. Pal, J. Paloheimo and H. Stubb, Appl. Phys. Lett., 1995, 67, 3909.
12. T. S. Kosherov and V. I. Serazetdinov, Vestn. Nats. Akad. Nauk Resp. Kaz., 1996, 2, 53.
13. D. W. Dwight, H. F. Wu and A. P. Diwanji, Proc. Annu. Meet Adhes. Soc., 1997, 20, 465.
14. N. N. Trofimov, A. N. Kalenchuk and M. Z. Kanovich, Plast. Massy, 1992, 21.
15. J. E. Selwyn and J. I. Steinfeld, J. Phys. Chem., 1972, 76, 762.
16. M. Levitt, J. Mol. Biol., 1974, 82, 59.
17. M. B. Bever, in Encyclopedia of Material Science and Engineering, Pergamon Press, New York, 1986, p. 2022.
18. R. L. Mozzi and B. Warren, J. Appl. Crystallogr., 1969, 2, 164.
19. V. L. Levshin and E. G. Baranova, Opt. Spectrosc. (USSR), 1959, 6, 31.
20. M. M. Allingham, J. M. Cullen, C. H. Giles, S. K. Jain and J. S. Woods, J. Appl. Chem., 1958, 8, 108.
21. J. Sangiv, J. Am. Chem. Soc., 1980, 102, 92.
22. P. Ilich, P. K. Mishra, S. Macura and T. P. Burghardt, Spectrochim. Acta, Part A, 1996, 52, 1323.