Journal
DYES AND PIGMENTS
Volume 81, Issue 2, Pages 119-123Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2008.09.013
Keywords
MCM-41; Naphthalimide derivative; Fluorescence; Photoinduced electron transfer
Funding
- National Basic Research of China [2004CB719500]
- National Nature Science Foundation of China [20773039]
- Research Fund for the Doctoral Program of Higher Education [20070251006]
- Ministry of Science and Technology of China [2006AA06Z379, 2007AA05Z303, 2006DFA52710]
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4-Piperazinyl-N-methyl-1,8-naphthalimide (PMN) was synthesized and encapsulated into mesoporous molecular sieves. The fluorescent emission spectra and fluorescence decay of PMN/M-MCM-41 (where M=Si, Cc, Al) were used to investigate the photophysical properties of the hybrid composites. The emission intensity of 4-piperazinyl-N-methyl-1,8-naphthalimide can be increased by decreasing the pH environment of the hybrid composites; the emission intensity varied with different MCM-41 hosts in the order: PMN/Al-MCM-41 > PMN/Si-MCM-41 > PMN/Ce-MCM-41: the fluorescence lifetime of PMN molecules followed the same order. The reasons for the improved fluorescence intensity and the prolonged lifetime of PMN in a low pH environment and Al-MCM-41 are discussed. (C) 2008 Elsevier Ltd. All rights reserved.
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