@article{Fu2023, 
author = {Lulu Fu and Hui Li and Yan Fang and Zihao Guan and Zhiyuan Wei and Naying Shan and Fang Liu and Yang Zhao and Mingfei Zhang and Zhipeng Huang and Mark G. Humphrey and Chi Zhang},
title = {Cascading electron transfer and photophysics in a donor-π-acceptor graphene nanoconjugate},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {4},
pages = {5909-5918},
keywords = {graphene, nanoconjugate, donor-π-acceptor (D-π-A), cascading charge separation, nonlinear optics},
url = {https://www.sciopen.com/article/10.1007/s12274-022-5167-8},
doi = {10.1007/s12274-022-5167-8},
abstract = {Electron-donating porphyrins (Por), electron-accepting phthalocyanines (Pcs), and reduced graphene oxide (RGO) were integrated into a multicomponent nanoconjugate (Por-RGO-Pc). The donor-π-acceptor nanoconjugate Por-RGO-Pc was characterized using Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), atomic force microscopy (AFM), and ultraviolet–visible (UV–Vis) spectroscopy. Photoinduced cascading electron/charge transfer from Por to RGO and from RGO to Pc was established from fluorescence, electrochemical, and femtosecond transient absorption (fs-TA) spectroscopy studies. The increased distance between the electron donors and acceptors of the Por-RGO-Pc nanoconjugate compared to the parent materials and the intermediate RGO-Pc results in long-lived charge separation, and an enhancement in nonlinear optical (NLO) absorption (a large NLO coefficient of about 827.44 cm/GW) towards nanosecond laser irradiation at 532 nm.}
}