Photochemical Reactions of Nitrocobalt(III) Tetraphenylporphyrin and Its Pyridine Complex Studied by Laser Flash Photolysis

1997 ◽  
Vol 101 (44) ◽  
pp. 8174-8178 ◽  
Author(s):  
Hiroshi Seki ◽  
Katuji Okada ◽  
Yasuhiro Iimura ◽  
Mikio Hoshino
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Photochemical Reactions ◽  
Pyridine Complex

Studies of Photochemical Reactions of 7,8-Digermabicyclo[2.2.2]octadienes by Steady-State and Laser Flash Photolysis Techniques

2000 ◽  
Vol 19 (17) ◽  
pp. 3379-3386 ◽  
Author(s):  
Kunio Mochida ◽  
Takanari Kayamori ◽  
Masanobu Wakasa ◽  
Hisaharu Hayashi ◽  
Mikhail P. Egorov
Keyword(s):  
Steady State ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Photochemical Reactions

Photochemical reactions of triplet state of N-hydroxyacridine-9-thione studied by laser-flash photolysis

1999 ◽  
Vol 1 (8) ◽  
pp. 1851-1857 ◽  
Author(s):  
Maksudul M. Alam ◽  
Osamu Ito ◽  
Waldemar Adam ◽  
Günther N. Grimm ◽  
Chantu R. Saha-Möller
Keyword(s):  
Triplet State ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Photochemical Reactions

scholarly journals Photochemical reactions of metal nitrosyl complexes. Mechanisms of NO reactions with biologically relevant metal centers

2001 ◽  
Vol 3 (3) ◽  
pp. 161-169 ◽  
Author(s):  
Peter C. Ford
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Nitrogen Monoxide ◽  
Laser Flash ◽  
Photochemical Reactions ◽  
Water Soluble ◽  
Hypoxic Cell ◽  
Biological Targets ◽  
Nitrosyl Complexes ◽  
Metal Nitrosyl

The discoveries that nitric oxide (a.k.a. nitrogen monoxide) serves important roles in mammalian bioregulation and immunology have stimulated intense interest in the chemistry and biochemistry of NO and derivatives such as metal nitrosyl complexes. Also of interest are strategies to deliver NO to biological targets on demand. One such strategy would be to employ a precursor which displays relatively low thermal reactivity but is photochemically active to release NO. This proposition led us to investigate laser flash and continuous photolysis kinetics of nitrosyl complexes such as the Roussin's iron-sulfur-nitrosyl cluster anionsFe2S2(NO)42−andFe4S3(NO)7−and several ruthenium salen and porphyrin nitrosyls. These include studies using metal-nitrosyl photochemistry as a vehicle for delivering NO to hypoxic cell cultures in order to sensitizeγ-radiation damage. Also studied were the rates and mechanisms of NO “on” reactions with model water soluble heme compounds, the ferriheme protein met-myoglobin and various ruthenium complexes using ns laser flash photolysis techniques. An overview of these studies is presented.

Kinetics of photochemical reactions of biphotochromic compounds based on spironaphthopyran and enamine – conjugation effect

2016 ◽  
Vol 15 (3) ◽  
pp. 382-388 ◽  
Author(s):  
Peter P. Levin ◽  
Alexander S. Tatikolov ◽  
Natalia L. Zaichenko ◽  
Andrey I. Shienok ◽  
Liubov S. Koltsova ◽  
...  
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Photochemical Reactions ◽  
Nanosecond Laser ◽  
Conjugation Effect ◽  
Nanosecond Laser Flash Photolysis ◽  
Kinetics Of

A novel biphotochromic compound with was synthesized and studied by nanosecond laser flash photolysis.

scholarly journals Photodegradation of organic pollutants in aqueous solutions caused by Fe(OH)aq2+ photolysis: Evidence of OH radical formation

2004 ◽  
Vol 6 (2) ◽  
pp. 89-93 ◽  
Author(s):  
I. P. Pozdnyakov ◽  
Yu. A. Sosedova ◽  
V. F. Plyusnin ◽  
E. M. Glebov ◽  
V. P. Grivin ◽  
...  
Keyword(s):  
Hydroxyl Radical ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Photochemical Reactions ◽  
Radical Formation ◽  
Nanosecond Laser ◽  
Alternative Mechanism ◽  
Organic Additives ◽  
Intermolecular Electron Transfer

Photochemistry of Fe(III) hydroxocomplexes has a great interest because of possibility of hydroxyl radical formation at the primary photochemical step. This mechanism is based mainly on the analysis of the final products of photochemical reactions between light-excited Fe(III) complexes and organic compounds. However, realization of an alternative mechanism of photolysis, based on the intermolecular electron transfer from organic molecules located in the second coordination sphere to the light-excited complex could take place. To distinguish these mechanisms, the experiments on the nanosecond laser flash photolysis of Fe(OH)aq2+ in water solutions (pH 3) with organic additives; namely nitrobenzene, N,N-dimethylformamide, and phenol have been performed. And the formation of the organic radicals Ph(•OH)NO2, HCON(CH2•)(CH3), and Ph(OH)2•, was observed, respectively. The rate constants of the formation and decay of the radicals coincide with those found in literature. The results support the formation of the hydroxyl radical upon the photolysis of Fe(OH)aq2+.

Effect of Aggregation on Bacteriochlorin a Triplet-state Formation: A Laser Flash Photolysis Study¶

2002 ◽  
Vol 76 (5) ◽  
pp. 480 ◽  
Author(s):  
Xavier Damoiseau ◽  
Francis Tfibel ◽  
Maryse Hoebeke ◽  
Marie-Pierre Fontaine-Aupart
Keyword(s):  
Triplet State ◽  
State Formation ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash
Sign in / Sign up

Export Citation Format

Share Document