Excited-State Intramolecular Proton Transfer Reaction and Ground-State Hole Dynamics of 4′-N,N-Dialkylamino-3-hydroxyflavone in Ionic Liquids Studied by Transient Absorption Spectroscopy

2021 ◽  
Author(s):  
Hanamichi Miyabayashi ◽  
Kaori Fujii ◽  
Takumi Watanabe ◽  
Yoshihiro Matano ◽  
Takatsugu Endo ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Excited State ◽  
Proton Transfer ◽  
Absorption Spectroscopy ◽  
Ground State ◽  
Transfer Reaction ◽  
Transient Absorption ◽  
Proton Transfer Reaction ◽  
Intramolecular Proton Transfer ◽  
Transient Absorption Spectroscopy

Effects of different substituents of methyl 5-R-salicylates on the excited state intramolecular proton transfer process

2018 ◽  
Vol 20 (6) ◽  
pp. 4208-4215 ◽  
Author(s):  
Yongqing Li ◽  
Yanzhen Ma ◽  
Yunfan Yang ◽  
Wei Shi ◽  
Ruifang Lan ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Transfer Process ◽  
Transfer Reaction ◽  
Proton Transfer Reaction ◽  
Intramolecular Proton Transfer ◽  
Hydroxyl Group ◽  
Highly Sensitive ◽  
Proton Transfer Process

The proton transfer reaction in methyl 5-R-salicylate is found to be highly sensitive to the presence of specific substituents in resonance with the hydroxyl group, leading to different fluorescence behaviors of methyl 5-R-salicylate with different substituents.

scholarly journals Excited-state intramolecular proton-transfer reaction demonstrating anti-Kasha behavior

2016 ◽  
Vol 7 (1) ◽  
pp. 655-665 ◽  
Author(s):  
Huan-Wei Tseng ◽  
Jiun-Yi Shen ◽  
Ting-Yi Kuo ◽  
Ting-Syun Tu ◽  
Yi-An Chen ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Transfer Reaction ◽  
Proton Transfer Reaction ◽  
High Energy ◽  
Intramolecular Proton Transfer

When excited with high energy quanta, specially designed 3-hydroxychromone derivatives demonstrate dramatic enhancement of the excited-state intramolecular proton transfer (ESIPT) reaction in obvious violation of Kasha's rule.

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