Abstract
9-Substutited dainthracene undergo photodimerizations to form head-to-tail and/or head-to-head dimers. We are studying the photochemistry of 9-anthrylalkylamines (3-(9-anthryl)propylamine (APA), 2-(9-anthryl)ethylamine (AEA), 9-anthrylalkylamine (AMA)) with the aim of controling its photodimerization. 9-Anthrylmethylamines form carnamic acid, carbonate, or ammmonium carbamate when they react with carbon dioxide in solution. We employed several solvents, methanol, DMSO, 2-propanol. By bubbling carbon dioxide into the amine solutions, the APA and the AEA formed the carbamic acid in DMSO, the carbamate in methanol, and probably the ammonium carbamate in 2-propanol. The APA and the AEA photoreacted to yield mainly the head-to-tail dimers in methanol or DMSO solution. We also examined the solid-state photoreaction. Both the APA carbamate and the AEA carbamate didn't dimerize in the solid state.
