▎ 摘　　要

In this paper an organic molecule labeled as UPPY with both pi-pi interaction unit of pyrene (PY) and hydrogen bonding unit of urediopyrimidinone (UP) was employed as binding module to link the layer-by-layer graphene film. Firstly, UPPY was anchored on the surface of thermal reduced graphene (trGO) with the aids of pi-pi interactions forming trGO-UPPY. The trGO-UPPY showed different morphology in CHCl3 and N,N-dimethylformamide (DMF) due to the different hydrogen binding mode. Then by the synergism of hydrogen bonding and pi-pi interactions offered by UPPY, multilayer film of trGO-UPPY was prepared through layer-by-layer technique. The electron-transfer resistance (Ret) of trGO-UPPY/ITO decreased from 53 Omega of bare ITO to 27 Omega. In addition, trGO-UPPY/ITO electrodes exhibited enhanced electrochemical activity toward dopamine (DA). Compared with bare ITO, the oxidation peak current of DA on rGO-UPPY/ITO can be enhanced about 100 times than that of bare ITO. (C) 2017 Elsevier B.V. All rights reserved.