Takashi Kubo

TL;DR: In this article, the authors investigated the relationship between the diradical character and the second hyperpolarizabilities, γ, for a trigonal graphene nanoflake (trigonal GNF) and two types of GNFs with rhombic and bow-tie structures composed of two trigonal GNFs.

TL;DR: It is found that, as a function of the donor atoms, the diradical character of these complexes varies from 0.0 to 0.884 and is associated with substantial variations of gamma, which is in good agreement with the structure-property relationship obtained for pure hydrocarbon systems.

TL;DR: It is shown that the radical caused by tip-induced debromination can be reversibly terminated by either a bromine atom or a fullerene molecule and pave the way for sequential reactions, particularly addition reactions, by a local probe at the single-molecule level decoupled from the surface.

TL;DR: The impact of topology on the open-shell characters and the second hyperpolarizabilities (γ) has been addressed for one-dimensional graphene nanoflakes (GNFs) composed of the smallest trigonal graphene units and the fascinating structure-property relationships not only deepen the understanding of open- shell characters of GNFs but aim also at stimulating further design studies to achieve giant NLO responses based on open-Shell graphene-like materials.