Amorphous 2D materials containing a conjugated-polymer network

Shoichiro Yano, Kosuke Sato, Jumpei Suzuki, Hiroaki Imai, Yuya Oaki
2019 Communications Chemistry  
Two-dimensional materials, such as layered compounds and nanosheets, have attracted interest for their characteristic structures and properties. If layered materials containing functional organic molecules are synthesized, designed nanosheets can be obtained by exfoliation. Here we show the design and synthesis of an amorphous organic layered material containing a conjugated-polymer network, its exfoliation into nanosheets, and their applications. Copolymerization of benzoquinone and pyrrole
more » ... erates random stacks of the conjugated polymer layers through successive C-C bond formation and pericyclic reaction under mild conditions at 60°C. The amorphous organic layered materials are efficiently exfoliated into nanosheets in 44.6% after 1 h. The nanosheets are used as a metal-free electrocatalyst for hydrogen evolution reaction with the overpotential 0.28 V (vs. RHE). The present approach may be applied to the design of functional nanosheets with graphenelike structures under mild conditions. :,; Prior to the LSV measurement, the BQ-Py polymer was reduced to recovery of the conjugation by chronoamperometry at -0.30 V vs. RHE for 5 h. The stability of the BQ-Py nanosheet for HER was studied using the sample after cyclic voltammetry in the range from 0 to -0.3 V vs. RHE for 500 times at the scan rate 100 mV s −1 . COMMUNICATIONS CHEMISTRY | https://doi.
doi:10.1038/s42004-019-0201-9 fatcat:qib7n2r56nh4xdoffmdj7254ku