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Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes

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Published on: January 10, 2017

TritonX-100 selective chemosensor based on beta-cyclodextrin modified by anthracene derivative.

Yoshikazu Oka¹, Shinnosuke Nakamura, Tatsuya Morozumi

¹Division of Environmental Materials Science, Graduate School of Environmental Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan.

|August 31, 2010

Summary

A novel anthracene-modified cyclodextrin (Ant-CD) acts as a sensitive chemosensor. It detects Triton X-100 (TX-100) through significant fluorescence enhancement, forming a supramolecular complex.

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Published on: March 12, 2015

Area of Science:

Supramolecular Chemistry
Materials Science
Analytical Chemistry

Background:

Beta-cyclodextrin (CD) derivatives are widely explored for host-guest complexation.
Anthracene moieties can impart unique photophysical properties to host molecules.
Developing selective sensors for surfactants like Triton X-100 (TX-100) is crucial for various applications.

Purpose of the Study:

To synthesize and characterize an anthracene-modified cyclodextrin (Ant-CD).
To investigate the complexation behavior of Ant-CD with TX-100 and related compounds.
To evaluate Ant-CD's potential as a fluorescent chemosensor for TX-100.

Main Methods:

Synthesis of 2-(9-anthracenecarboxamido)phenyl modified beta-cyclodextrin (Ant-CD).
UV-Vis and fluorescence spectroscopy to study complexation and fluorescence changes.
Nuclear Magnetic Resonance (NMR) spectroscopy, specifically (1)H-(1)H NOESY, to confirm complex structure.

Main Results:

Fluorescence intensity of Ant-CD increased approximately 10-fold upon addition of TX-100 in water.
A significant fluorescence enhancement (approx. 4-fold) was also observed with n-octylbenzenesulfonate.
Evidence of pseudorotaxane supramolecular complex formation between Ant-CD and TX-100 was obtained via NMR.

Conclusions:

Ant-CD demonstrates high sensitivity and selectivity as a fluorescent chemosensor for TX-100.
The formation of a pseudorotaxane complex is key to the sensing mechanism.
This Ant-CD derivative shows promise for detecting specific surfactants in aqueous solutions.