NOT-INHIBIT Reversible Logic Gate Behavior of g-C3N4-Hg2+-Complexed Nanoparticles

摘要

abstract_textpThe g-C3N4-Hg2+ complexed nanoparticles with two fluorescence emission (at 368 and 450nm) have been synthesized and characterized with scanning electron microscope, transmittance electron microscope, Fourier-transform infrared spectroscopy, ultraviolet- visible spectrophotometer and X-ray diffraction methods. A decrease in the XRD peak intensity of g-C3N4-Hg2+ at 13.4 degrees suggested that Hg2+ ions might be trapped into the in-plane heptazine holes. Computational studies of g-C3N4-Hg2+ nanoparticles confirmed large binding energies for in-plan-Hg2+ structures and suggested that the fluorescence quenching (at 368nm) is caused by the complexation of nanoparticles with Hg2+ ions. Due to the strong affinity between Hg2+ and CN- confirmed by computational studies, the quenched fluorescence emission at 368nm "OFF" can be completely returned "ON" in the presence of CN- and then efficiently quenched by the addition of Hg2+. The OFF-ON-OFF fluorescence cycles have been exploited to design an "INHIBIT" logic gate using Hg2+ and CN- ions. In addition, the second emission peak (at 450nm) was quenched by Cr2O72- and was not affected by other ions (Hg2+ and CN-) indicating a "NOT" (inverter) logic gate./p/abstract_text