Fluorescent cyclodextrin immobilized on a cellulose membrane as a chemosensor system for detecting molecules

¹Department of Bioengineering, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan.

|May 8, 2001

Summary

A novel fluorescent sensor was developed using dansyl glutamate-modified cyclodextrin immobilized on a cellulose membrane. This sensor detects guest molecules by a decrease in fluorescence, enabling practical applications in chemical sensing.

Area of Science:

* Supramolecular Chemistry
* Analytical Chemistry
* Materials Science

Background:

* Cyclodextrins are widely used as host molecules in supramolecular chemistry.
* Fluorescent probes offer sensitive detection methods for various analytes.
* Immobilization of host molecules onto solid supports facilitates sensor development.

Purpose of the Study:

* To synthesize and characterize dansyl glutamate-modified beta-cyclodextrin (DnsGlu-beta-CD).
* To immobilize DnsGlu-beta-CD onto a cellulose membrane for sensor application.
* To investigate the sensing capabilities of the DnsGlu-beta-CD-membrane for guest molecules.

Main Methods:

* Synthesis of DnsGlu-beta-CD via chemical modification.
* Immobilization of DnsGlu-beta-CD onto a cellulose membrane.
* Fluorescence spectroscopy to monitor changes upon guest molecule addition.

Main Results:

* DnsGlu-beta-CD exhibited fluorescence that decreased with increasing guest molecule concentration.
* Immobilization on a cellulose membrane retained the sensing properties of DnsGlu-beta-CD.
* The observed fluorescence quenching indicates guest-induced conformational changes in the cyclodextrin host.

Conclusions:

* Cellulose membranes are suitable supports for chromophore-modified cyclodextrins.
* DnsGlu-beta-CD-membrane serves as a novel, disposable chemosensor for detecting molecules.
* This approach offers a practical platform for developing new fluorescent chemosensors.

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Fluorescent cyclodextrin immobilized on a cellulose membrane as a chemosensor system for detecting molecules

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Related Experiment Videos

Fluorescent cyclodextrin immobilized on a cellulose membrane as a chemosensor system for detecting molecules

Area of Science:

Background:

Purpose of the Study:

Main Methods:

Main Results:

Conclusions:

Related Concept Videos

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