A STUDY ON THE PHOTOPHYSICAL PROPERTIES OF ANTHRACENE IN ZEOLITE

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The photophysical behaviours of anthracene in zeolite Y were investigated using various steady state spectroscopic methods and a picosecond time-resolved fluorescence spectroscopic technique. A Xe-129 nuclear magnetic resonance (NMR) study shows that anthracene molecules can be optimally intercalated into the supercages of Na+- and Cu2+-exchanged zeolite Y at 570 and 520 K respectively. Anthracene introduced into the supercage of Na+- exchanged zeolite Y shows excimeric fluorescence with a lifetime of several nanoseconds, as well as monomeric fluorescence with a lifetime of 300 ps. The excimer forms immediately on absorption of a photon. Cu2+-exchanged zeolite Y with anthracene intercalation shows electron spin resonance (ESR) signals and absorption bands attributable to the stable, ground state anthracene cation radical, the Cu+ ion and the trapped electron in the copper ion cluster, indicating charge transfer from anthracene to the Cu2+ ion or copper ion cluster. The excitation energy of anthracene is quenched rapidly by the presence of copper ion.
Publisher
ELSEVIER SCIENCE SA LAUSANNE
Issue Date
1994-05
Language
English
Article Type
Article; Proceedings Paper
Keywords

AROMATIC-HYDROCARBONS; FLUORESCENCE-SPECTRA; ELECTRON-TRANSFER; EXCIMER FORMATION; METAL-IONS; Y-ZEOLITE; PYRENE; STATE; MOLECULES; NMR

Citation

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, v.80, no.1-3, pp.333 - 339

ISSN
1010-6030
DOI
10.1016/1010-6030(93)01007-O
URI
http://hdl.handle.net/10203/16745
Appears in Collection
CH-Journal Papers(저널논문)
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