Solidification and Simultaneous Dual-Wavelength Emission of Rhodamine 6G and Coumarin 102 Codoped in AlPO4 Mesoporous Glass

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• 作者：Rihong Li ; Youyu Fan ; Jiacheng Li ; Bin Tang ; Jintai Fan ; Jin He ; Jinjun Ren ; Jun Wang ; Long Zhang
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：May 12, 2011
• 年：2011
• 卷：115
• 期：18
• 页码：9176-9181
• 全文大小：835K
• 年卷期：v.115,no.18(May 12, 2011)
• ISSN：1932-7455

文摘

Transparent AlPO₄ mesoporous glasses codoped with different amounts, as well as different molar ratios, of Rhodamine 6G (Rh6G) and Coumarin 102 (Cou102) were fabricated by a dipping method. Solidification of dyes in mesoporous AlPO₄ glasses was probed by ²⁷Al and ³¹P solid state NMR techniques. The interaction of dyes with the glassy AlPO₄ network has been characterized by a new six-coordinated aluminum species (Al(6)) environment in ²⁷Al MAS spectra, combined with advanced solid state NMR techniques probing ²⁷Al鈭?sup>1H and ²⁷Al鈭?sup>31P internuclear dipole couplings. Optical excitation and simultaneous dual-wavelength emission spectra of both series of samples show significant dependences on the Rh6G and Cou102 concentration and Cou102/Rh6G molar ratio. Efficient simultaneous dual-wavelength emission was observed at low dye concentration (<10^鈭? M), whereas at high dye concentration (>10^鈭? M), quenching of the fluorescence of Cou102 happened, but the fluorescence intensity was dependent on the Cou102/Rh6G molar ratio.