Excited-state intramolecular proton transfer and conformational relaxation in 4′-N,N-dimethylamino-3-hydroxyflavone doped in acetonitrile crystals

2016 ◽  
Vol 18 (41) ◽  
pp. 28564-28575 ◽  
Author(s):  
Kazuki Furukawa ◽  
Norifumi Yamamoto ◽  
Kazuyuki Hino ◽  
Hiroshi Sekiya
Keyword(s):  
Excited State ◽  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Conformational Relaxation ◽  
Excited State Dynamics

Excited-state dynamics of 4′-N,N-dimethylamino-3-hydroxyflavone doped in acetonitrile crystals has been investigated by using steady-state and time-resolved fluorescence spectroscopy.

Steric Control of the Excited-State Intramolecular Proton Transfer in 3-Hydroxyquinolones:  Steady-State and Time-Resolved Fluorescence Study

2007 ◽  
Vol 111 (37) ◽  
pp. 8986-8992 ◽  
Author(s):  
Dmytro A. Yushchenko ◽  
Volodymyr V. Shvadchak ◽  
Andrey S. Klymchenko ◽  
Guy Duportail ◽  
Vasyl G. Pivovarenko ◽  
...  
Keyword(s):  
Excited State ◽  
Steady State ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Time Resolved Fluorescence ◽  
Fluorescence Study ◽  
Time Resolved ◽  
Steric Control

Spectral and Photoprototropic Characteristics of 4-Aminobiphenyl in β-Cyclodextrin

2004 ◽  
Vol 69 (4) ◽  
pp. 748-758 ◽  
Author(s):  
Israel V. Muthu Vijayan Enoch ◽  
Meenakshisundaram Swaminathan
Keyword(s):  
Excited State ◽  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Inclusion Complex ◽  
Ground State ◽  
Time Resolved Fluorescence ◽  
Neutral Form ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

The photophysical and photoprototropic behaviour of 4-aminobiphenyl (4ABP) in aqueous β-cyclodextrin (β-CDx) solution has been investigated using steady-state and time-resolved fluorescence spectroscopy. Fluorescence of the neutral form of 4ABP is enhanced due to the formation of a 1:1 complex with β-CDx. The formation of this complex has been confirmed by time-resolved spectroscopy. In the presence of β-CDx, no change was observed in the ground state pKa value but the excited state pKa value changed. Based on its photophysical and photoprototropic characteristics in β-CDx, the structure of the 1:1 inclusion complex is proposed.

Time-resolved fluorescence spectroscopy study of excited state dynamics of alkyl- and benzo-substituted triphyrin(2.1.1)

2014 ◽  
Vol 16 (26) ◽  
pp. 13129-13135 ◽  
Author(s):  
Yusuke Iima ◽  
Daiki Kuzuhara ◽  
Zhao-Li Xue ◽  
Seiji Akimoto ◽  
Hiroko Yamada ◽  
...  
Keyword(s):  
Excited State ◽  
Fluorescence Spectroscopy ◽  
Spectroscopy Study ◽  
Time Resolved Fluorescence ◽  
Radiative Relaxation ◽  
Time Resolved ◽  
Excited State Dynamics

Non-radiative relaxation in triphyrin(2.1.1) is found to be due to non-planarity of the macrocycle.

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