UV-induced growth of cyanopolyyne chains in cryogenic solids

摘要: UV laser excitation of cryogenic solids doped with cyanoethyne, HC3N, led to an in situ creation longer carbon–nitrogen chains, namely HC5N, C4N2, and C6N2, heralded by their strong visible luminescence. HC5N C4N2 molecules can form, most probably, within HC3N aggregates linked hydrogen bonds, while the reaction occurring between two isolated, photochemically created C3N radicals yields C6N2. This latter species, dicyanobutadiyne, is easily detected Ar, Kr, N2, as well parahydrogen solids. The C6N2 phosphorescence identified here for first time. reported carbon chain coupling reactions rigid environments are interest astrochemistry interstellar ices.