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Tailoring Intermolecular Interactions for Efficient Room‐Temperature Phosphorescence from Purely Organic Materials in Amorphous Polymer Matrices
Author(s) -
Kwon Min Sang,
Lee Dongwook,
Seo Sungbaek,
Jung Jaehun,
Kim Jinsang
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201404490
Subject(s) - phosphorescence , intermolecular force , amorphous solid , vinyl alcohol , hydrogen bond , materials science , molecule , photochemistry , phosphor , polymer , fluorescence , chemical physics , chemical engineering , nanotechnology , chemistry , optoelectronics , organic chemistry , composite material , physics , quantum mechanics , engineering
Herein we report a rational design strategy for tailoring intermolecular interactions to enhance room‐temperature phosphorescence from purely organic materials in amorphous matrices at ambient conditions. The built‐in strong halogen and hydrogen bonding between the newly developed phosphor G1 and the poly(vinyl alcohol) (PVA) matrix efficiently suppresses vibrational dissipation and thus enables bright room‐temperature phosphorescence (RTP) with quantum yields reaching 24 %. Furthermore, we found that modulation of the strength of halogen and hydrogen bonding in the G1–PVA system by water molecules produced unique reversible phosphorescence‐to‐fluorescence switching behavior. This unique system can be utilized as a ratiometric water sensor.