Premium
A Phosphorescent Molecular “Butterfly” that undergoes a Photoinduced Structural Change allowing Temperature Sensing and White Emission
Author(s) -
Han Mingu,
Tian Yu,
Yuan Zhao,
Zhu Lei,
Ma Biwu
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.201405293
Subject(s) - phosphorescence , excited state , luminescence , photoexcitation , photochemistry , materials science , chemistry , photoluminescence , platinum , chemical physics , fluorescence , atomic physics , optoelectronics , optics , physics , catalysis , biochemistry
A butterfly‐like phosphorescent platinum(II) binuclear complex can undergo a molecular structure change in which the Pt–Pt distance shortens upon photoexcitation, which leads to the formation of two distinct excited states and dual emission in the steady state, that is, greenish‐blue emission from the high‐energy excited state at the long Pt–Pt distance and red emission from the low‐energy excited state at the short Pt–Pt distance. This photoinduced molecular structure change has a strong dependence on the molecule’s surrounding environment, allowing its application as self‐referenced luminescent sensor for solid–liquid phase change, viscosity, and temperature, with greenish‐blue emission in solid matrix and rising red emission in molten liquid phase. With proper control of the surrounding media to manipulate the structural change and photophysical properties, a broad white emission can be achieved from this molecular butterfly.