Carbon-13 NMR Relaxation Study of 1,8-Bis(dimethylamino)naphthalene in Isotropic Solution

Abstract

Carbon-13 nuclear spin relaxation in 1,8-bis(dimethylamino)naphthalene (DMAN) was investigated in a dimethylformamide-d7 solution. In addition, the chemical shielding tensors were measured in the crystalline powder. Detailed analysis of 13C longitudinal relaxation in this molecule yielded its rotational diffusion tensor. Comparison to the protonated form of DMAN, DMANH+, leads to conclusions concerning interaction of the latter with its counterion