Synthesis and photoelectrical properties of β-Cyclodextrin functionalized graphene materials with high bio-recognition capability

beta-Cyclodextrin (beta-CD) functionalized graphene materials were synthesized by nucleophilic addition reaction between hydroxypropyl-beta-Cyclodextrin (HPCD) and thionyl chloride modified graphene oxides (GO). The photoinduced electron-transfer between tetra-phenyl-porphyrin (TPP) and HPCD modified graphene materials were studied through fluorescence absorption spectroscopy, and obvious quenching was observed after adding HPCD-graphene to the DMF solution of TPP. However, the fluorescence intensity of TPP in the DMF solution was hardly changed in the presence of HPCD-GO. Cyclic voltammetry measurement (CV) was used to investigate the electrochemical interactions between hemoglobin (Hb) and TPP. The HPCD-GO/TPP modified electrode showed 5.0 x 10 (9) Mof the detection limit to Hb, indicating high bio-recognition capability. (C) 2010 Elsevier B. V. All rights reserved.