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Flexible and transparent films consisting of lanthanide complexes for ratiometric luminescence thermometry
- Yang, Daqing, Liu, Dexi, Tian, Chunkun, Wang, Song, Li, Huanrong
- Journal of colloid and interface science 2018 v.519 pp. 11-17
- emissions factor, europium, luminescence, temperature, terbium, thermal stability, thermometers
- Herein, a flexible and transparent film consisting Eu3+/Tb3+ lanthanide complexes and poly(methylmethacrylate) was constructed via solution casting method, and further developed as a ratiometric luminescent thermometer with an excellent linear response to temperature variation from 77 to 297 K. The thermometer displays higher photo- and thermostability than corresponding pure complexs. Based on that the emission intensity ratio of 5D4 → 7F5 transition (Tb3+) to 5D0 → 7F2 transition (Eu3+) can be linearly related to the temperature, the resulting thermometer is not only more reliable than single Eu3+(or Tb3+) material based on one emission, and but also has higher sensitivity than other types of luminescent thermometers. This work highlights the practical applications of luminescent films in temperature-sensing fields.