The UV-visible absorption cross-sections of IONO2
نویسندگان
چکیده
The UV-visible absorption spectrum of gaseous IONO2 has been measured over the wavelength range 245– 415 nm using the technique of laser photolysis with timeresolved UV-visible absorption spectroscopy. IONO2 was produced in situ in the gas phase by laser flash photolysis of NO2/CF3I/N2 mixtures. Post flash spectra were deconvolved to remove contributions to the observed absorption from other reactant and product species. The resulting spectrum attributed to IONO2 consists of several overlapping broad absorption bands. Assuming a quantum yield of unity for IONO2 photolysis, model calculations show that during sunlit hours at noon, 53 N, the first order solar photolysis rate coefficient (J value) for IONO2 is 4.0× 10−2 s−1.
منابع مشابه
The IONO2 absorption cross-sections
The UV-visible absorption spectrum of gaseous IONO 2 has been measured over the wavelength range 245–415 nm using the technique of laser photolysis with time-resolved UV-visible absorption spectroscopy. IONO 2 was produced in situ in the gas phase by laser flash photolysis of NO 2 /CF 3 I/N 2 mixtures. Post-flash spectra were deconvolved 5 to remove contributions to the observed absorption from...
متن کاملThe Effects of Different Seed Layers and Growth Time on the Quality of ZnO NRs Arrays
ZnO nanorods (NRs) were synthesized using an in situ low-temperature hydrothermal method. In order to investigate the effect of different seed layers on quality of ZnO NRs arrays, alcoholic, alkaline and acidic seed solutions were deposited by spin coating on ITO-glass substrate. Experimental results revealed that the vertically ZnO NRs obtained from monoethanolamine-based seed layer is the...
متن کاملo-nitrobenzyl photolabile protecting groups with red-shifted absorption: syntheses and uncaging cross-sections for one- and two-photon excitation.
We evaluated the o-nitrobenzyl platform for designing photolabile protecting groups with red-shifted absorption that could be photolyzed upon one- and two-photon excitation. Several synthetic pathways to build different conjugated o-nitrobenzyl backbones, as well as to vary the benzylic position, are reported. Relative to the reference 4,5-dimethoxy-2-nitrobenzyl group, several o-nitrobenzyl de...
متن کاملTheoretical evaluation of PAH dication properties
Aims. We present a systematic theoretical study on 40 polycyclic aromatic hydrocarbons dications (PAHs ++) containing up to 66 carbon atoms. Methods. We performed our calculations using well established quantum–chemical techniques in the framework of the density functional theory (DFT) to obtain the electronic ground–state properties, and of the time–dependent DFT (TD–DFT) to evaluate the excit...
متن کاملStudies on UV-Visible, Fluorescent Spectral Properties and Solvatochromic behavior of Naphthalimide Compound Containing Quaternary Ammonium
This paper presents the results of absorption spectra, fluorescence properties and the effect of solvents on UV-Vis spectra of dye quaternized 4-acetylamino-N-2-aminomethylpyridine-1,8-naphthalimide. The fluorescency of the dye was evaluated and its Stokes shift value was 6140 cm-1 in DMF. The solvatochromism behavior of the novel compound is investigated by studying its spectra in pure organic...
متن کامل