Radiation-induced transformations of isolated CH3CN molecules in noble gas matrices

Isomerization of cyanopropyne in solid argon

“…These include observation of C 3 NH photochemically formed from HC 3 N 25 or CH 2 CNH from CH 3 CN. 26,[39][40][41] However, no experimental measurements of 1,2,3-butatrien-1-imine (4) are available. No pertinent spectroscopic studies of other C 4 H 3 N isomers could be found.…”

Photochemistry of XCH2CN (X = −Cl, −SH) in Argon Matrices

“…Intense peaks, for which we did not find any convincing attribution, are marked in Table . These lines do not fit with other potential products whose IR signatures in an Ar matrix environment have already been reported: SCHCN; CH 3 CN or further photolysis products (CH 3 NC, CH 2 NCH, CH 2 CNH, CH 2 NC); CH 3 SH; HS; H 2 S; CH 2 (NIST gas); HS–CN; or HS–NC …”

Radiation-Induced Transformations of C6H6 Molecules in Solid Noble-Gas Matrices: Is Benzene Intrinsically Resistant in Condensed Media?

“…In this case, the energy of ionizing radiation is primarily absorbed by the matrix and activation of isolated molecules occurs due to highly efficient positive hole and excitation transfer. 6,[15][16][17]22,31,32 This common scheme was directly proved for a number of aliphatic hydrocarbons and functional organic molecules based on the effect of electron scavengers and combined IR and EPR spectroscopic studies. 16,19,31,32 As shown previously, 31,32 the positive hole transfer (2) predominates for most organic molecules with an ionization energy of up to ca.…”

“…It was noting, however, that the available data are related to the benzene phases or solutions, and it is difficult to make an unequivocal judgment about the role of intrinsic (structural) factors and medium effects in the radiation resistance and degradation mechanisms of benzene molecules in condensed media. As shown in our recent studies, the effect of the inert environment on the radiation-induced transformation of organic molecules can be experimentally simulated using radiolysis in noble-gas matrices with different physical properties. − An earlier study on the radiolysis of benzene in solid xenon using a combination of electron paramagnetic resonance (EPR) and Fourier transform infrared (FTIR) spectroscopy revealed formation of noticeable amounts of phenyl radicals and trapped hydrogen atoms, but no quantitative data were obtained. It is also worth mentioning that the strong effect of proton bombardment of benzene molecules in solid argon (1/500) was reported previously; however, this study was restricted to the detection of stable final products observed at very high absorbed doses.…”