A novel combined pulsed laser flash photolysis-optoacoustic spectroscopy technique for the quantitative study of relaxation processes of excited species produced in two-laser, two-photon experiments

1989 ◽  
Vol 93 (17) ◽  
pp. 6397-6401 ◽  
Author(s):  
R. W. Redmond ◽  
D. D. M. Wayner ◽  
J. M. Kanabus-Kaminska ◽  
J. C. Scaiano
Keyword(s):  
Quantitative Study ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Pulsed Laser ◽  
Laser Flash ◽  
Relaxation Processes ◽  
Spectroscopy Technique ◽  
Two Photon ◽  
Excited Species ◽  
Optoacoustic Spectroscopy

scholarly journals Resonance Two-Photon Ionization of Diarylethene in the Presence of Cyclodextrin

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Michihiro Hara ◽  
Makoto Miwa ◽  
Tatsuya Takeshita ◽  
Shouhei Watanabe
Keyword(s):  
Transient Absorption ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Quantum Yields ◽  
Two Photon ◽  
Photon Excitation ◽  
Simultaneous Irradiation ◽  
Aqueous Solvent ◽  
Photon Ionization

The transient absorption of the diarylethene 1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)-3,3,4,4,5,5-hexafluoro-1-cyclopentene (DE) was measured using 266 nm laser flash photolysis in the presence of various cyclodextrins (CDs) in aqueous solvent. Ionization of DE occurred within the laser flash (5 ns) to give the DE radical cation and water-solvated electron. The electron was generated by two-photon excitation through simultaneous irradiation with 266 nm laser light, and the ionization quantum yields of DE in the presence ofα-CD,β-CD, m-β-CD, andγ-CD depended on the properties of the DE/CD complexes. These results suggest that useful two-photon ionization occurred for these complexes. The ionization quantum yield of DE was found to increase in aqueous solution after the addition of m-β-CD (50 mM), in which m-β-CD likely controlled the photochromic reactivity of DE.

Two-photon and UV-laser flash photolysis of the Ca2+cage, dimethoxynitrophenyl-EGTA-4

Cell Calcium ◽  
1999 ◽  
Vol 25 (1) ◽  
pp. 85-91 ◽  
Author(s):  
F. DelPrincipe ◽  
M. Egger ◽  
G.C.R. Ellis-Davies ◽  
E. Niggli
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Uv Laser ◽  
Two Photon
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