Photodissociation of ClONO2:  2. Time-Resolved Absorption Studies of Product Quantum Yields

1997 ◽  
Vol 101 (36) ◽  
pp. 6667-6678 ◽  
Author(s):  
R. J. Yokelson ◽  
James B. Burkholder ◽  
R. W. Fox ◽  
A. R. Ravishankara
Keyword(s):  
Quantum Yields ◽  
Time Resolved ◽  
Absorption Studies

scholarly journals Effect of the Substitution Position on the Electronic and Solvatochromic Properties of Isocyanoaminonaphthalene (ICAN) Fluorophores

Molecules ◽  
2019 ◽  
Vol 24 (13) ◽  
pp. 2434 ◽  
Author(s):  
Sándor Lajos Kovács ◽  
Miklós Nagy ◽  
Péter Pál Fehér ◽  
Miklós Zsuga ◽  
Sándor Kéki
Keyword(s):  
Radiative Decay ◽  
Fluorescence Emission ◽  
Solvent Polarity ◽  
Decay Rates ◽  
Quantum Yields ◽  
Time Resolved Fluorescence ◽  
Solvatochromic Shift ◽  
Fluorescence Emission Spectra ◽  
Time Resolved ◽  
Donor And Acceptor

The properties of 1,4-isocyanoaminonaphthalene (1,4-ICAN) and 2,6-isocyanoaminonaphthalene (2,6-ICAN) isomers are discussed in comparison with those of 1,5-isocyanoaminonaphthalene (1,5-ICAN), which exhibits a large positive solvatochromic shift similar to that of Prodan. In these isocyanoaminonaphthalene derivatives, the isocyano and the amine group serve as the donor and acceptor moieties, respectively. It was found that the positions of the donor and the acceptor groups in these naphthalene derivatives greatly influence the Stokes and solvatochromic shifts, which decrease in the following order: 1,5-ICAN > 2,6-ICAN > 1,4-ICAN. According to high-level quantum chemical calculations, this order is well correlated with the charge transfer character of these compounds upon excitation. Furthermore, unlike 1,5-ICAN, the 1,4-ICAN and 2,6-ICAN isomers showed relatively high quantum yields in water, that were determined to be 0.62 and 0.21, respectively. In addition, time-resolved fluorescence experiments revealed that both the radiative and non-radiative decay rates for these three ICAN isomers varied unusually with the solvent polarity parameter ET(30). The explanations of the influence of the solvent polarity on the resulting steady-state and time-resolved fluorescence emission spectra are also discussed.

Near-Infrared Time-Resolved Optical Absorption Studies of the Reaction of Fully Reduced CytochromecOxidase with Dioxygen†

Biochemistry ◽  
2001 ◽  
Vol 40 (8) ◽  
pp. 2332-2339 ◽  
Author(s):  
Istvan Szundi ◽  
Guang-Ling Liao ◽  
Ólöf Einarsdóttir
Keyword(s):  
Optical Absorption ◽  
Near Infrared ◽  
Time Resolved ◽  
Absorption Studies

NH and CH laser-induced fluorescence in low-pressure flames: Quantum yields from time-resolved measurements

1989 ◽  
Vol 22 (1) ◽  
pp. 1867-1875 ◽  
Author(s):  
Karen J. Rensberger ◽  
Richard A. Copeland ◽  
Michael L. Wise ◽  
David R. Crosley
Keyword(s):  
Low Pressure ◽  
Laser Induced Fluorescence ◽  
Quantum Yields ◽  
Time Resolved ◽  
Time Resolved Measurements
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