15293-33-1Relevant academic research and scientific papers
Charge transfer photochemistry of Reinecke's salt and of some of its analogues containing organic amines
Mainusch, Bernadette,Karocki,Guldi,Stasicka,Wasgestian
, p. 87 - 93 (1997)
N-substituted Reineckates of the compositions [CrA2(NCS)4]- (A=NH3, aniline, n-propylamine, morpholine) and [Cr(A-A)(NCS)4]- (A-A=en, tn) have been prepared. The ligand field absorption maxima were slightly shifted to longer wavelengths in the order NH3- on charge-transfer excitation (254 nm). With exception of the aniline complex they were also decomposed to some extent, yielding Cr(II) and (NCS)2·- radicals. Approximately 10% of the photochemically formed Cr(II) was oxidised to chromate(VI) in air saturated methanol as was shown by comparison with chemically and radiolytically reduced [Cr(NH3)2(NCS)4]-. (NCS)2·- radical formation was observed by flash photolysis as well as by pulse radiolysis. Photochemical quantum yields for continuous irradiations of air saturated methanolic solutions were determined for the disappearance of the starting material, ranging from ΦCr=0.16 (aniline) to ΦCr=0.31 (en), for NCS- release ranging from ΦNCS=0.17 (aniline) to 0.52 (n-propylamine) and for chromate(VI) formation ranging from ΦCrO43, n-propylamine).
