Development of fluorescent microgel thermometers based on thermo-responsive polymers and their modulation of sensitivity range
- 13 April 2005
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 15 (27-28), 2796-2800
- https://doi.org/10.1039/b502277k
Abstract
Fluorescent molecular thermometers based on thermo-responsive linear polymer molecules such as poly(N-isopropylacrylamide) (PNIPAM) labelled with a polarity-responsive fluorescent molecule benzofurazan (BD) are the most sensitive known. Thermo-responsive PNIPAM and some related polymer microgel particles labelled with BD by emulsion polymerization have been prepared and their fluorescence properties in water as fluorescent thermometers studied. All the cross-linked polymer microgel particles dispersed in water fluoresce strongly as soon as each threshold temperature is exceeded. The nine kinds of microgel dispersion developed in this work thoroughly cover the sensitivity range from 18 to 47 °C. They are not only more sensitive than the previous fluorescent molecular thermometers based on other principles but also highly reproducible in their behaviour.This publication has 21 references indexed in Scilit:
- Fluorescent Molecular Thermometers Based on Polymers Showing Temperature-Induced Phase Transitions and Labeled with Polarity-Responsive BenzofurazansAnalytical Chemistry, 2003
- Fluorogenic and fluorescent labeling reagents with a benzofurazan skeletonBiomedical Chromatography, 2001
- Fluorescence investigations of the thermally induced conformational transition of poly(N-isopropylacrylamide)Polymer, 2001
- Effect of urea on the conformational behavior of poly( N -isopropylacrylamide)Colloid and Polymer Science, 2001
- Fluorescence characteristics of six 4,7-disubstituted benzofurazan compounds: an experimental and semi-empirical MO studyJournal of the Chemical Society, Perkin Transactions 2, 1999
- Fluorescence Probe Studies of Thermosensitive N−Isopropylacrylamide Copolymers in Aqueous SolutionsMolecular Crystals and Liquid Crystals, 1998
- Effects of the substituent groups at the 4- and 7-positions on the fluorescence characteristics of benzofurazan compoundsJournal of the Chemical Society, Perkin Transactions 2, 1998
- Signaling Recognition Events with Fluorescent Sensors and SwitchesChemical Reviews, 1997
- Poly(N-isopropylacrylamide): experiment, theory and applicationProgress in Polymer Science, 1992
- Fluorescence studies of aqueous solutions of poly(N-isopropylacrylamide) below and above their LCSTMacromolecules, 1990