Phase Separation of Excimer-Forming Fluorescent Dyes and Amorphous Polymers: A Versatile Mechanism for Sensor Applications

A temperature‐sensing scheme that relies on kinetically trapping molecular mixtures of a sensor molecule and amorphous host materials in a thermodynamically unstable state is introduced. Subjecting the blends to temperatures above their glass transition leads to irreversible changes of their photolu...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2005-06, Vol.17 (12), p.1471-1476
Main Authors: Crenshaw, B. R., Weder, C.
Format: Article
Language:English
Subjects:
Dyes
Photoluminescence
Polymer blends
Sensors
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Summary:A temperature‐sensing scheme that relies on kinetically trapping molecular mixtures of a sensor molecule and amorphous host materials in a thermodynamically unstable state is introduced. Subjecting the blends to temperatures above their glass transition leads to irreversible changes of their photoluminescence emission spectra due to phase separation and excimer formation, as shown in the Figure for blend films before (left) and after annealing at 150 °C for 42 h (right).
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200401688