▎ 摘　　要

The pi-pi stacking ability of graphene sheets (GS), graphene oxide (GO), and single walled carbon nanotubes (SWCNT) with phthalocyanine (Pc) molecules was studied by the UV-vis absorption, steady state and time-resolved fluorescence spectra. Absorption spectra revealed that strong pi-pi binding with the Pc ground state (S-0) occurred for GS and GO but not for SWCNT, the binding ability is GS >> GO >> SWCNT. However, when a Pc molecule is photoexcited, fluorescence study shows that the pi-pi interaction capability is changed to GS >> SWCNT >> GO. Although SWCNT exhibits low ability to bind Pc S-0 state, it strongly interacts with Pc S-1 state. The data analysis shows that the dynamic quenching for the nanoscaled carbon quenchers still obeys linear Stern-Volmer relationship, but the static quenching is not linear. An exponential expression is needed to fit the data for GS and SWCNT, which indicates that an effective quenching sphere model is valid for the nanoscaled fluorescence quenchers. (C) 2014 Elsevier B.V. All rights reserved.