Preparation of two-dimensional pyrazine-linked conjugated organic skeletons and their paramagnetic properties

Abstract

<p indent=0mm>A two-dimensional pyrazine-linked conjugated organic framework with good crystallinity, namely HATP–HKH powder, was successfully prepared by a bottom-up synthesis approach. The structure and magnetic property of the material were characterized by powder X-ray diffraction patterns, Fourier-transform infrared spectra, high-resolution transmission microscopy, atomic force microscopy, superconducting quantum interferometer device magnetometer, electron spin resonance spectroscopy, and other instruments. The HATP–HKH nanosheets prepared by the liquid-phase exfoliation showed a height in the range of <sc>0.8−1.4 nm.</sc> The structure of the nanosheets was analogous to that of graphene-antidot lattices. At <sc>2 K,</sc> the material exhibited a typical paramagnetic behavior with the magnetization of 0.029 emu g⁻¹. Such a material could be developed and applied in the electronics and spintronic devices.