[reaction: see text] Laser flash photolysis experiments, chemical trapping studies, and time-dependent density functional theory calculations demonstrate that photolysis of protonated 1,1-diarylhydrazines generates N,N-diarylnitrenium ions.

Time-resolved studies of germylene, GeH(2), and dimethygermylene, GeMe(2), generated by the 193 nm laser flash photolysis of appropriate precursor molecules have been carried out to try to obtain rate coefficients for their bimolecular reactions with dimethylgermane, Me(2)GeH(2), in the gas-phase. GeH(2) + Me(2)GeH(2) was studied over the pressure range 1-100 Torr with SF(6) as bath gas and at ...

[1] The photolysis of nitrous acid (HONO) in the early morning hours is believed to be a significant source of hydroxyl radicals (OH), the most important daytime oxidizing species. Although the importance of this mechanism has been recognized for many years, no accurate experimental quantification is available. Here we present measurements of HONO, NO2, SO2, O3 and HCHO by Differential Optical ...

Both the photolysis products and absorption of khnology cross sections of the C1O dimer, C1OOC1, are important to the photochemistry of the polar winter. In this work dimer photolysis was studied at the wavelength 254 mn, at 195 K. The dimer was prepared by the photolysis of C120 at 254 nm. As ditner appeared, it absorbed a significant fraction of the 254 nm light, By following the rate of phot...

The study of pollution due to combined antibiotics and metals is urgently needed. Photochemical processes are an important transformation pathway for antibiotics in the environment. The mechanisms underlying the effects of metal-ion complexation on the aquatic photochemical transformation of antibiotics in different dissociation forms are crucial problems in science, and beg solutions. Herein, ...

The kinetics of the potentially atmospherically important ClO + CH3O2 reaction (1) have been studied over the range T = 250-298 K at p = 760 Torr using laser flash photolysis radical generation, coupled with time resolved ultraviolet absorption spectroscopy, employing broad spectral monitoring using a charge coupled device detector array. ClO radicals were monitored unequivocally using this tec...

Experiments are conducted to determine the effect of a cage ofwatermolecules on the photolysis quantum yields of nitrate, FeOH2þ, and H2O2. Results suggest that the quantum yields of nitrate and FeOH2þ are decreased by the recombination of photo-fragments ( OH þ NO2 and Fe2þ þ OH, respectively) before they leave the surrounding cage of water molecules. However, no evidence is found for an enhan...