| 摘要： |
Two kinds of four-bladed perylene diimide (PDI) propellers with d(8) metal and non-metal cores are efficiently synthesized. The Ni-PDI, Pd-PDI, and Pt-PDI propellers, equipped with d(8) metal cores, have two absorption bands at 350-650 nm and 780-1200 nm with deep LUMO levels of -4.40 eV to -4.51 eV. The TTF-PDI, QU-PDI, and PH-PDI propellers with non-metal cores have only one absorption band at 350-650 nm with upshifted LUMO levels. Interestingly, the organic photovoltaic (OPV) results show that reducing the intramolecular charge traps between the blade and core subunits of the PDI propellers can effectively improve the power conversion efficiency (PCE). The device based on the QU-PDI acceptor exhibits a PCE that is up to more than 300 times higher (9.33%) than that of the d(8) metal core PDI propellers (Pd-PDI, PCE = 0.03%), which is one of the best photovoltaic performances with an excellent fill factor (FF = 71.8%) exhibited by PDI-derivative acceptors. Conversely, the electro-catalytic H-2 evolution activity of Pt-PDI (current destiny = 10.00 mA cm(-2) at -0.377 V), which exhibited a record performance for PDI-based catalysts to date, is up to 1000 times greater than that of the non-metal core PDI propellers (QU-PDI, 0.01 mA cm(-2) at -0.377 V). Our results indicate that both highly efficient OPV and electrochemical H-2 evolution catalysts can be achieved via the rational functionalization of PDI propellers with non-metal and d(8) metal cores. |
