Photophysical properties of pyrene in zeolites: Adsorption and distribution of pyrene molecules on the surfaces of zeolite L and mordenite

Journal Article · Thu Dec 01 04:00:00 EST 1994 · Chemistry of Materials

DOI:https://doi.org/10.1021/cm00048a016· OSTI ID:39388

Liu, Xinsheng; Thomas, J K ^[1]

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1. Univ. of Notre Dame, IN (United States)

Adsorption of pyrene on the surfaces of zeolites L and mordenite is investigated using photophysical techniques. Although the internal surfaces of both zeolites are polar, their external surfaces may not be the same. A difference is observed for mordenite. No pyrene excimers can be produced in mordenite, while excimers are readily formed in zeolite L. Due to structural constraints, 30-35% of pyrene adsorbed in mordenite cannot be quenched by O{sub 2}. Rotational movement of pyrene molecules in mordenite is also restricted by the zeolite structure. Laser photolysis produces pyrene cation and anion radicals, the former having a larger yield than the latter in both zeolites. 31 refs., 5 figs., 2 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 39388
• Journal Information: Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 12 Vol. 6; ISSN CMATEX; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ADSORPTION
MORDENITE
PYRENE
SORPTIVE PROPERTIES