▎ 摘　　要

In the present article, graphene complexes with out-of-plane organic substances such as a triphenylmethyl radical, anion, and cation are studied. Comparison is made with the similar closed-shell molecule (cyclohexa-2,5-dien-l-ylidenemethylene)dibenzene. The nearest contact in the complexes is realized between a hydrogen atom of the organic molecule and a carbon atom of graphene. The geometry of the organic molecules does not change significantly, but changes in graphene's electronic density of states make possible the identification of the formed pi-pi complex. This effect represents an extension of the idea that graphene is capable of single-molecule detection to graphene being capable of adsorption complex detection and, more importantly, identification.