Photophysics of the porphyrins; unusual fluorescence of europium porphyrin complex entrapped in sol-gel silica matrix

被引：0
|
作者：
Dargiewicz-Nowicka, J. [1 ]
Makarska, M. [1 ]
Villegas, M.A. [2 ]
Legendziewicz, J. [3 ]
Radzki, St. [1 ]
机构：
[1] Faculty of Chemistry, M. Curie-Sklodowska University, M. Curie-Sklodowska Sq. 2, 20-031 Lublin, Poland
[2] Ctro. Nac. de Invest. Metalurgicas, CSIC, Avda. Gregorio del Amo 8, 28040 Madrid, Spain
[3] Faculty of Chemistry, Wroclaw University, 50-383 Wroclaw, Poland
来源：
Journal of Alloys and Compounds | 2004年 / 380卷 / 1-2 SPEC. ISS.期
关键词：
Absorption - Benzene - Chromatography - Electric excitation - Fluorescence - Hydrochloric acid - Optical properties - Porphyrins - Positive ions - Purification - Silica - Sol-gels - Solvents - Synthesis (chemical) - Ultraviolet spectroscopy;
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摘要：
In this paper, the study on encapsulation of water-soluble cationic porphyrins: methyl-pyridyl porphyrin (H2TMePyP) and its Eu(III) complex in the monolith gels prepared by sol-gel method are reported. The samples doped with the porphyrins were prepared by tetraethoxysilane (TEOS) hydrolysis and condensation. Their absorption and emission spectroscopic properties in comparison with the spectra of the same compounds in various solvents are investigated. The spectra of metal complex were compared with those of free-base porphyrin. The strong fluorescence of europium porphyrin in the silica matrix is observed under excitation in Q-band (530nm), while at the same time emission neither free-base porphyrin nor europium chloride does not occur. It can be explained by the strong interaction of the Eu(III)TMePyP(acac) with the silica. © 2004 Elsevier B.V. All rights reserved.
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页码：380 / 388
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