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Femtosecond fluorescence studies of Auramine O in hybrid sol-gel derived films

Published online by Cambridge University Press:  01 February 2011

P. Prosposito ,
A. Quatela ,
H. Zhang  and
M. Glasbeek
P. Prosposito
Affiliation:
Physics Department, University of Rome Tor Vergata Via della Ricerca Scientifica 1, 00133, Rome – Italy
H. Zhang
Affiliation:
Laboratory for Physical Chemistry, University of Amsterdam Nieuwe Achtergracht 129, 1018 WS Amsterdam - The Netherlands
M. Glasbeek
Affiliation:
Laboratory for Physical Chemistry, University of Amsterdam Nieuwe Achtergracht 129, 1018 WS Amsterdam - The Netherlands
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Abstract

Femtosecond fluorescence upconversion experiments have been performed on Auramine O (a diphenylmethane dye) in polymethylmethacrylate (PMMA) and in hybrid organic/inorganic solgel based films.

All the investigated samples showed a fast decay (few picoseconds) and a long decay (hundreds of picoseconds). The fast components are representative of the rapid cooling of the excess excitation energy to the matrices. The long components are representative of the excited-state lifetime of the probed molecules. Auramine O in solid matrices showed lifetimes longer than in liquid solutions. Torsional diffusion motions of the two phenyl rings of the molecule are held responsible for the excited-state dynamics.

A dynamic Stokes shift has been observed for all samples. The lack of a rise time when detection was on the red side is explained in terms of an adiabatic coupling between emissive and nonemissive excited states, as is the case of liquid solutions. Different spectral shifts in PMMA and hybrid glasses have been measured. A different coupling between the emissive and nonemissive excited states for the two types of matrices is considered.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 847: Symposium EE – Organic/Inorganic Hybrid Materials , 2004 , EE13.19
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

1. Prosposito, P. and Casalboni, M., in Handbook of Organic-Inorganic Materials and Nanocomposites - Volume 1: Hybrid Materials, edited by Nalwa, H. S. (American Scientific Publishers, 2003) pp. 83–123.Google Scholar
2. Sanchez, C., Lebeau, B., Chaput, F. and Boilot, J. P., in Functional Hybrid Materials edited by Gómez-Romero, P. and Sanchez, C. (Wiley-VCH Weinheim, 2004) pp 122–171.Google Scholar
3. Zewail, A. H., J. Phys. Chem. A 104, 5660 (2000).Google Scholar
4. Bagchi, B. and Biswas, R., Adv. Chem. Phys. 109, 207 (1999).Google Scholar
5. Sundström, V., Prog. Quantum Electron. 24, 187 (2000).Google Scholar
6. Wise, F. W., Rosker, M. J. and Tang, C. J., J. Phys. Chem. 86, 2827 (1987).Google Scholar
7. Jurczok, M., Plaza, P., Martin, M. M. and Rettig, W., J. Phys. Chem. A 103, 3372 (1999).Google Scholar
8. Ishikawa, M., Ye, J.Y., Maruyama, Y. and Nakatsuka, H., J. Phys. Chem. A 103, 4319 (1999).Google Scholar
9. Gautam, P. and Harriman, A., J. Chem. Soc. Faraday Trans. 90, 697 (1994).Google Scholar
10. Changenet, P., Zhang, H., van der Meer, M. J., Glasbeek, M., Plaza, P. and Martin, M. M., J. Phys. Chem. A 102, 6716 (1998).Google Scholar
11. Chatterjee, S. K. and Misra, N., J. Macromol. Sci., Pure Appl. Chem. 36, 85 (1999).Google Scholar
12. Zhang, Y. L., Agbaria, R. A. and Warner, I. M., Supramol. Chem. 8, 309 (1997).Google Scholar
13. Miyagishi, S., Kurimoto, H. and Asakawa, T., Langmuir 11, 2951 (1995).Google Scholar
14. Martin, M. M., Plaza, P. and Meyer, Y. H., Chem. Phys. 192, 367 (1995).Google Scholar
15. van der Meer, M. J., Zhang, H. and Glasbeek, M., J. Chem. Phys. 112, 2878 (2000).Google Scholar
16. Glasbeek, M. and Zhang, H., Chem. Rev. 104, 1929 (2004).Google Scholar
17. Hirose, Y., Yui, H., Sawada, T., J. Phys. Chem. B 108, 9070 (2004).Google Scholar