Functionalization of mesoporous silica membrane with a Schiff base fluorophore for Cu(II) ion sensing

Xiaotong Chen; Akira Yamaguchi; Manato Namekawa; Toshio Kamijo; Norio Teramae; Aijun Tong

doi:10.1016/j.aca.2011.04.002

Functionalization of mesoporous silica membrane with a Schiff base fluorophore for Cu(II) ion sensing

Xiaotong Chen, Akira Yamaguchi, Manato Namekawa, Toshio Kamijo, Norio Teramae, Aijun Tong

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

A Schiff base (SB) immobilized hybrid mesoporous silica membrane (SB-HMM) was prepared by immobilizing a Schiff base onto the pore surface of mesoporous silica (pore size=3.1nm) embedded in the pores of a porous anodic alumina membrane. In contrast to the non-fluorescent analogous SB molecule in homogeneous solutions, SB-HMM exhibited intense fluorescence due to emission enhancement caused by aggregation of SB groups on the pore surface. The high quantum efficiency of the surface SB groups allows SB-HMM to function as a fluorescent sensor for Cu(II) ions in an aqueous solution with good sensitivity, selectivity and reproducibility. Under the optimal conditions described, the linear ranges of fluorescence intensity for Cu(II) are 1.2-13.8(M (R²=0.993) and 19.4-60 (R²=0.992) (M. The limit of detection for Cu(II) is 0.8μM on basis of the definition by IUPAC (C_LOD=3.3S_b/m).

Original language	English
Pages (from-to)	94-100
Number of pages	7
Journal	Analytica Chimica Acta
Volume	696
Issue number	1-2
DOIs	https://doi.org/10.1016/j.aca.2011.04.002
Publication status	Published - 2011 Jun 24

Keywords

Aggregation-induced emission enhancement
Cu(II) detection
Mesoporous silica
Schiff base

ASJC Scopus subject areas

Biochemistry
Analytical Chemistry
Spectroscopy
Environmental Chemistry

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title = "Functionalization of mesoporous silica membrane with a Schiff base fluorophore for Cu(II) ion sensing",

abstract = "A Schiff base (SB) immobilized hybrid mesoporous silica membrane (SB-HMM) was prepared by immobilizing a Schiff base onto the pore surface of mesoporous silica (pore size=3.1nm) embedded in the pores of a porous anodic alumina membrane. In contrast to the non-fluorescent analogous SB molecule in homogeneous solutions, SB-HMM exhibited intense fluorescence due to emission enhancement caused by aggregation of SB groups on the pore surface. The high quantum efficiency of the surface SB groups allows SB-HMM to function as a fluorescent sensor for Cu(II) ions in an aqueous solution with good sensitivity, selectivity and reproducibility. Under the optimal conditions described, the linear ranges of fluorescence intensity for Cu(II) are 1.2-13.8(M (R2=0.993) and 19.4-60 (R2=0.992) (M. The limit of detection for Cu(II) is 0.8μM on basis of the definition by IUPAC (CLOD=3.3Sb/m).",

keywords = "Aggregation-induced emission enhancement, Cu(II) detection, Mesoporous silica, Schiff base",

author = "Xiaotong Chen and Akira Yamaguchi and Manato Namekawa and Toshio Kamijo and Norio Teramae and Aijun Tong",

year = "2011",

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doi = "10.1016/j.aca.2011.04.002",

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T1 - Functionalization of mesoporous silica membrane with a Schiff base fluorophore for Cu(II) ion sensing

AU - Chen, Xiaotong

AU - Yamaguchi, Akira

AU - Namekawa, Manato

AU - Kamijo, Toshio

AU - Teramae, Norio

AU - Tong, Aijun

PY - 2011/6/24

Y1 - 2011/6/24

N2 - A Schiff base (SB) immobilized hybrid mesoporous silica membrane (SB-HMM) was prepared by immobilizing a Schiff base onto the pore surface of mesoporous silica (pore size=3.1nm) embedded in the pores of a porous anodic alumina membrane. In contrast to the non-fluorescent analogous SB molecule in homogeneous solutions, SB-HMM exhibited intense fluorescence due to emission enhancement caused by aggregation of SB groups on the pore surface. The high quantum efficiency of the surface SB groups allows SB-HMM to function as a fluorescent sensor for Cu(II) ions in an aqueous solution with good sensitivity, selectivity and reproducibility. Under the optimal conditions described, the linear ranges of fluorescence intensity for Cu(II) are 1.2-13.8(M (R2=0.993) and 19.4-60 (R2=0.992) (M. The limit of detection for Cu(II) is 0.8μM on basis of the definition by IUPAC (CLOD=3.3Sb/m).

AB - A Schiff base (SB) immobilized hybrid mesoporous silica membrane (SB-HMM) was prepared by immobilizing a Schiff base onto the pore surface of mesoporous silica (pore size=3.1nm) embedded in the pores of a porous anodic alumina membrane. In contrast to the non-fluorescent analogous SB molecule in homogeneous solutions, SB-HMM exhibited intense fluorescence due to emission enhancement caused by aggregation of SB groups on the pore surface. The high quantum efficiency of the surface SB groups allows SB-HMM to function as a fluorescent sensor for Cu(II) ions in an aqueous solution with good sensitivity, selectivity and reproducibility. Under the optimal conditions described, the linear ranges of fluorescence intensity for Cu(II) are 1.2-13.8(M (R2=0.993) and 19.4-60 (R2=0.992) (M. The limit of detection for Cu(II) is 0.8μM on basis of the definition by IUPAC (CLOD=3.3Sb/m).

KW - Aggregation-induced emission enhancement

KW - Cu(II) detection

KW - Mesoporous silica

KW - Schiff base

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Functionalization of mesoporous silica membrane with a Schiff base fluorophore for Cu(II) ion sensing

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Keywords

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