• 文献标题:   Photophysical studies of graphene quantum dots - Pyrene-derivatized porphyrins conjugates when encapsulated within Pluronic F127 micelles
  • 文献类型:   Article
  • 作  者:   MANAGA M, ACHADU OJ, NYOKONG T
  • 作者关键词:   pyrenederivatized porphyrin, singlet oxygen quantum yield, fluorescence quenching, graphene quantum dot, pluronic f127 micelle
  • 出版物名称:   DYES PIGMENTS
  • ISSN:   0143-7208 EI 1873-3743
  • 通讯作者地址:   Rhodes Univ
  • 被引频次:   6
  • DOI:   10.1016/j.dyepig.2017.09.031
  • 出版年:   2018

▎ 摘  要

Pyrene-derivatized H-2, GaCl, and Zn porphyrins were immobilized on graphene quantum dots (GQDs) to form (GQDs-H2TPrP, GQDs-GaClTPrP, and GQDs-ZnTPrP) conjugates through the pi-pi stacking interaction method followed by encapsulating into Pluronic F127 micelles to form (GQDs-H2TPrP F127, GQDsGaClTPrP + F127, and GQDs-ZnTPrP F127). Spectroscopic evidence shows that the resultant conjugates were stable due to the strong pi-pi stacking interaction between the GQDs and the porphyrins. The fluorescence and singlet oxygen generating behaviour of the porphyrins were investigated following incorporation. GQDs-GaClTPrP + F127 showed highest values of the binding constant (K-b). The Stern-Volmer constant (K-sv) for GQDs-ZnTPrP F127 were the highest compared to other porphyrins derivatives. (C) 2017 Elsevier Ltd. All rights reserved.