Development of fluorescent microgel thermometers based on thermo responsive polymers and their modulation of sensitivity range
Development of fluorescent microgel thermometers based on thermo responsive polymers and their modulation of sensitivity range
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DOI：
10.1039/b502277k
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发表时间：
2005-01-01
影响因子：
--
通讯作者：
de Silva, AP
中科院分区：
文献类型：
--
作者：
Iwai, K;Matsumura, Y;de Silva, AP
基于热响应线性聚合物分子（例如用极性响应荧光分子苯并呋喃 (BD) 标记的聚（N-异丙基丙烯酰胺）(PNIPAM)）的荧光分子温度计是已知最灵敏的。通过乳液聚合制备了BD标记的热敏PNIPAM和相关聚合物微凝胶颗粒，并研究了它们在水中作为荧光温度计的荧光性能。一旦超过每个阈值温度，分散在水中的所有交联聚合物微凝胶颗粒就会发出强烈的荧光。这项工作开发的九种微凝胶分散体完全覆盖了18至47摄氏度的灵敏度范围。它们不仅比以前基于其他原理的荧光分子温度计更灵敏，而且其行为具有高度的可重复性。
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 degrees C. They are not only more sensitive than the previous fluorescent molecular thermometers based on other principles but also highly reproducible in their behaviour.