Highly luminescent organic-inorganic hybrid mesoporous silicas containing tunable chemosensor inside the pore wall

被引:112
作者
Chandra, Debraj
Yokoi, Toshiyuki
Tatsumi, Takashi
Bhaumik, Asim [1 ]
机构
[1] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, W Bengal, India
[2] Indian Assoc Cultivat Sci, Ctr Adv Mat, Kolkata 700032, W Bengal, India
[3] Tokyo Inst Technol, Catalysis Chem Div, Midori Ku, Yokohama, Kanagawa 2268503, Japan
关键词
D O I
10.1021/cm701918t
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
New multifunctional luminescent hybrid mesoporous silicas (LHMS) containing a tunable chemosensor diimine moiety inside the pore wall have been synthesized. XRD and TEM image analyses indicate the formation of highly ordered 2D hexagonal mesophase from a 1:3 mixture of diimine organosilica and tetraethyl orthosilicate (TEOS) assisted by the supramolecular assembly of cetyltrimethylammonium bromide (CTAB); the use of diimine organosilica precursor alone leads to disordered mesophase. C-13 CP MAS, Si-29 MAS NMR, and UV-visible spectroscopic data show the incorporation of bridging organic diimine in the solid mesoporous materials. N-2 sorption data suggest high BET surface areas together with type IV isotherms for the LHMS samples. These hybrid mesoporous materials show very strong affinity for metal cations (Fe3+, Zn (2+), etc.), which could be utilized for possible application to metal ion chemosensors. All the LHMS samples exhibit very strong photoluminescence at room temperature and strong dependence of emission on exogenous ions. The highly ordered sample has the advantage over the disordered sample synthesized over pure diimine precursor, because its ion-exchange efficiency is high and it is synthesized with a small amount of diimine chemosensor precursor.
引用
收藏
页码:5347 / 5354
页数:8
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