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Updated: Jun 23, 2026

$Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing$

Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing

Published on: March 13, 2013

A fluorescent sensor array based on ion imprinted mesoporous silica.

Jin Tan¹, He-Fang Wang, Xiu-Ping Yan

¹Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Tianjin, China.

Biosensors & Bioelectronics

|May 20, 2009

Summary

This summary is machine-generated.

This study introduces a novel fluorescent sensor array using ion imprinted mesoporous silica for metal ion discrimination. The sensor effectively distinguishes between different metal ions, offering a new approach for chemical sensing.

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Area of Science:

Materials Science
Analytical Chemistry
Nanotechnology

Background:

Developing selective and sensitive methods for metal ion detection is crucial in environmental monitoring and chemical analysis.
Mesoporous silica materials offer high surface area and tunable pore structures for sensor applications.
Fluorescent sensors provide sensitive detection with potential for real-time monitoring.

Purpose of the Study:

To develop an ion imprinted mesoporous silica based fluorescence turn-on sensor array for discriminating metal ions.
To utilize a novel fluorescent monomer containing an 8-hydroxyquinoline (8-HQ) moiety for sensor construction.
To demonstrate the sensor array's capability in distinguishing target metal ions from non-target ions.

Main Methods:

Synthesis of fluorescent ion imprinted mesoporous silica using a one-pot co-condensation method with a functional monomer.
Preparation of imprinted materials for Zn(2+) and Cd(2+), alongside a non-imprinted control material (NIM).
Spectrofluorimetric titration and Langmuir-type analysis to determine binding constants.

Main Results:

The imprinted materials exhibited faster binding kinetics for metal ions compared to NIM.
The sensor array successfully discriminated between two template metal ions (Zn(2+), Cd(2+)) and three non-template metal ions (Mg(2+), Ca(2+), Al(3+)) at different concentrations.
The binding of metal ions was directly translated into fluorescence signals due to the covalently anchored fluorophore.

Conclusions:

A pattern-based fluorescent sensing system was established using a simple fluorescent receptor and the imprinting effect.
Ion imprinted mesoporous silica provides a robust platform for selective metal ion sensing.
The developed sensor array demonstrates high potential for practical applications in metal ion analysis.