Covalent functionalization of reduced graphene oxide with porphyrin by means of diazonium chemistry for nonlinear optical performance

Aijian Wang, Wang Yu, Zhipeng Huang, Feng Zhou, Jingbao Song, Yinglin Song, Lingliang Long, Marie P. Cifuentes, Mark G. Humphrey, Long Zhang, Jianda Shao, Chi Zhang*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    118 Citations (Scopus)

    Abstract

    Reduced graphene oxide (RGO)-porphyrin (TPP) nanohybrids (RGO-TPP 1 and RGO-TPP 2) were prepared by two synthetic routes that involve functionalization of the RGO using diazonium salts. The microscopic structures, morphology, photophysical properties and nonlinear optical performance of the resultant RGO-TPP nanohybrids were investigated. The covalent bonding of the porphyrin-functionalized-RGO nanohybrid materials was confirmed by Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, and thermogravimetric analysis. Attachment of the porphyrin units to the surface of the RGO by diazotization significantly improves the solubility and ease of processing of these RGO-based nanohybrid materials. Ultraviolet/visible absorption and steady-state fluorescence studies indicate considerable π-π interactions and effective photo-induced electron and/or energy transfer between the porphyrin moieties and the extended π-system of RGO. The nonlinear optical properties of RGO-TPP 1 and RGO-TPP 2 were investigated by open-aperture Z-scan measurements at 532 nm with both 4 ns and 21 ps laser pulses, the results showing that the chemical nanohybrids exhibit improved nonlinear optical properties compared to those of the benchmark material C 60, and the constituent RGO or porphyrins.

    Original languageEnglish
    Article number23325
    JournalScientific Reports
    Volume6
    DOIs
    Publication statusPublished - 24 Mar 2016

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