Twisted intramolecular charge transfer and aggregation-enhanced emission characteristics based quinoxaline luminogen: photophysical properties and a turn-on fluorescent probe for glutathione

2019 ◽  
Vol 7 (13) ◽  
pp. 3779-3786 ◽  
Author(s):  
Mingming Cui ◽  
Wenting Li ◽  
Lingyun Wang ◽  
Lingshan Gong ◽  
Hao Tang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Fluorescent Probe ◽  
Intramolecular Charge Transfer ◽  
Photophysical Properties ◽  
Pyridinium Salt ◽  
Emission Characteristics ◽  
Twisted Intramolecular Charge Transfer ◽  
Turn On

A light-up fluorescent probe (QUPY-S) for glutathione detection based on a triphenylethylene-containing quinoxaline pyridinium salt has been developed.

Theoretical study on the sensing mechanism of chalcone-based fluorescence probe for detecting hydrogen sulfide and biothiols

2021 ◽  
Author(s):  
Yunjian Cao ◽  
Lingling Wang ◽  
Ziqi Liu ◽  
Chaofan Sun ◽  
Yuanzuo Li
Keyword(s):  
Hydrogen Sulfide ◽  
Excited State ◽  
Charge Transfer ◽  
Proton Transfer ◽  
Fluorescent Probe ◽  
Theoretical Study ◽  
Fluorescence Probe ◽  
Intramolecular Charge Transfer ◽  
Intramolecular Proton Transfer ◽  
Twisted Intramolecular Charge Transfer

A fluorescent probe 2′-(2,4-dinitro-phenoxy)-4-(dimethylamino) chalcone (Pr1, Spectrochim. Acta, Part A 2021, 244, 118839)based on the twisted intramolecular charge transfer (TICT) and excited state intramolecular proton transfer (ESIPT) was designed and...

scholarly journals Controlling the Twisted Intramolecular Charge-Transfer Character of Pyrene Derivatives Through Solvent Polarity

2021 ◽  
Author(s):  
Young Mo Sung ◽  
Eun Suk Kwon ◽  
Yusuke Makida Maruyama ◽  
Youngsik Shin ◽  
Soo-Ghang Ihn ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Structural Changes ◽  
Intramolecular Charge Transfer ◽  
Photophysical Properties ◽  
Critical Role ◽  
Solvent Polarity ◽  
Twisted Intramolecular Charge Transfer ◽  
Excited State Dynamics ◽  
Pyrene Derivatives

Abstract Intramolecular charge transfer (ICT) plays a critical role in determining the photophysical properties of organic molecules, including their luminescence efficiencies. Twisted intramolecular charge transfer (TICT) is a process in which structural change accompanies ICT. Despite significant research, the relationship between TICT and solvent polarity, and its effects on photophysical properties, have been rarely investigated. Herein, we used time-resolved spectroscopy to study TICT in pyrene derivatives that are promising blue organic light emitting diode (OLED) emitter candidates; these derivatives show strong solvent-dependent charge-transfer (CT) behavior. Slight structural changes that do not affect excited state dynamics were observed in nonpolar solvents, while polar solvents were found to affect excited state dynamics and CT characteristics. The TICT behavior of these pyrene derivatives could be modulated through structural modification. Our study provides valuable guidelines for the control of optical properties, including the luminescence efficiencies of OLED emitters that show TICT characteristics.

Dynamic adjustment of emission from both singlets and triplets: the role of excited state conformation relaxation and charge transfer in phenothiazine derivates

2021 ◽  
Author(s):  
Weidong Qiu ◽  
Xinyi Cai ◽  
Mengke Li ◽  
Liangying Wang ◽  
Yanmei He ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Dynamic Adjustment ◽  
Twisted Intramolecular Charge Transfer

Dynamic adjustment of emission behaviours by controlling the extent of twisted intramolecular charge transfer character in excited state.

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