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Novel inorganic-organic hybrid fluorescence chemosensor derived from SBA-15 for copper cation
Ling Gao1, Jian Qiang Wang, Li Huang
1Key Laboratory of Mesoscopic Chemistry, College of Chemistry and Chemistry Engineering, Eco-materials and Renewable Energy Research Center, and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
Abstract:
A novel mesoporous SBA-15 type of hybrid material (3-trimethoxysilylpropyl)[4-(2-hydroxyphenyl)methylene] benzenesulfonamide (Schiff-SBA-15) has been obtained by co-condensation of tetraethyl orthosilicate and the organosilane, and the result of XRD confirms the order hexagonal structure of the composite. This hybrid mesoporous material is fluorescent-active, exhibiting high selectivity for sensing Cu2+ in polar solution. The remarkable fluorescence quenching in emission spectrum upon the addition of Cu2+ is attributed to the intramolecular charge transfer after the formation of a coordinate complex of a large conjugate system and Cu2+ ions.
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