We gratefully acknowledge financial support from the Petroleum Research Funds (ACS-PRF 38525-AC7), the National Science Foundation (NSF DMI-0428208), and DuPont (Young Professor Grant to C. W.). We are indebted to Dr. Christiane Löwe, Dr. Margherita Fontana, and Prof. Robert Simha for stimulating interactions and thank Samuel Rivier for technical assistance.
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Communication
Phase Separation of Excimer-Forming Fluorescent Dyes and Amorphous Polymers: A Versatile Mechanism for Sensor Applications†
Article first published online: 7 JUN 2005
DOI: 10.1002/adma.200401688
Copyright © 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Crenshaw, B. R. and Weder, C. (2005), Phase Separation of Excimer-Forming Fluorescent Dyes and Amorphous Polymers: A Versatile Mechanism for Sensor Applications. Adv. Mater., 17: 1471–1476. doi: 10.1002/adma.200401688
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Publication History
- Issue published online: 7 JUN 2005
- Article first published online: 7 JUN 2005
- Manuscript Accepted: 7 FEB 2005
- Manuscript Received: 13 OCT 2004
- Abstract
- References
- Cited By
Keywords:
- Dyes;
- Photoluminescence;
- Polymer blends;
- Sensors
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).