文献类型：期刊文献

英文题名：Dual-Emitting Dihydrophenazines for Highly Sensitive and Ratiometric Thermometry over a Wide Temperature Range

作者：Shi, Lijiang[1,2];Song, Wenxuan[1,2];Lian, Cheng[1,2];Chen, Wei[1,2];Mei, Ju[1,2];Su, Jianhua[1,2];Liu, Honglai[1,2];Tian, He[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2018

卷号：6

期号：15

外文期刊名：ADVANCED OPTICAL MATERIALS

收录：;EI(收录号：20182205257637);WOS:【SCI-EXPANDED(收录号:WOS:000440815200012)】；

基金：L.S. and W.S. contributed equally to this work. The authors gratefully acknowledge the financial support from the Programme of Introducing Talents of Discipline to Universities (No. B16017), NSFC/China (Nos. 21604023, 21790361, and 21421004), the Fundamental Research Funds for the Central Universities (Nos. 222201717003 and 222201714011), and the Shanghai Sailing Program (No. 16YF1402200).

语种：英文

外文关键词：dihydrophenazines; dual fluorescence; ratiometric thermometry; temperature-sensitive; vibration-induced emission

摘要：Achieving ratiometric thermometry with a single organic luminophore is a tempting but challenging task. Herein, three dihydrophenazine-based ratiometric thermometers, namely DPC, DPSi-1, and DPSi-2, are facilely developed via the novel vibration-induced emission (VIE) strategy. By elaborately introducing alkyl/siloxane chains to the dihydrophenazine core, these fluorophores exhibit as powder with low melting point or nonvolatile liquids, which emit temperature-sensitive dual emissions: predominantly blue fluorescence (FL) at low temperature and chiefly orange-red FL at high temperature. According to the VIE mechanism, high temperature activates the intramolecular motions, thus facilitates the excited-state configuration transformation of the phenazine moiety from bent to planar, as confirmed by the molecular dynamics calculation. The invisible temperature information over a broad range from 5 to 135 degrees C can be vividly revealed by these VIE-based ratiometric thermometers, with a high sensitivity (3.40% per degrees C), a wide linear response region (50-135 degrees C) and good reversibility, in a solvent-free and naked-eye observable manner. Very importantly, these thermometers can be coated onto any object surface for simple and fast large-area temperature detection, demonstrating their superior practicability compared with other luminescent thermometers. The ratiometric thermometry scheme proposed here may offer new insights into developing thermometers for various applications.