A novel ZnII-sensitive fluorescent chemosensor assembled within aminopropyl-functionalized mesoporous SBA-15.
A novel Zn2+-sensitive fluorescent chemosensor SC/SBA-15 has been obtained by the self-assembly of 4-chloroaniline-N-salicylidene (SC), a Schiff base ligand, within the channel of silylation-modified SBA-15 without destroying its hexagonally ordered mesoporous structure. The remarkable 200-fold fluorescence enhancement with a large Stokes shift of 180 nm in luminescence emission upon the addition of Zn2+ is attributed to the formation of a coordinate complex of a large rigid conjugate system and Zn2+ ions.
Gao
Ling
L
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
Wang
Ying
Y
Wang
Jianqiang
J
Huang
Li
L
Shi
Liying
L
Fan
Xiaoxing
X
Zou
Zhigang
Z
Yu
Tao
T
Zhu
Mei
M
Li
Zhaosheng
Z
D000586:Amination; D005456:Fluorescent Dyes / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D015394:Molecular Structure; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry*
D005456:Fluorescent Dyes; C509969:SBA-15; D017967:Zinc Compounds; D012822:Silicon Dioxide