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NOT‐INHIBIT Reversible Logic Gate Behavior of g‐C 3 N 4 ‐Hg 2+ ‐Complexed Nanoparticles
Author(s) -
Shiravand Ghasem,
Badiei Alireza,
Jafari Maryam,
Shayesteh Alireza,
Ziarani Ghodsi Mohammadi
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201703025
Subject(s) - analytical chemistry (journal) , nanoparticle , fluorescence , ion , fourier transform infrared spectroscopy , quenching (fluorescence) , scanning electron microscope , materials science , spectroscopy , chemistry , nanotechnology , optics , physics , organic chemistry , quantum mechanics , composite material
The g‐C 3 N 4 ‐Hg 2+ complexed nanoparticles with two fluorescence emission (at 368 and 450 nm) 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‐C 3 N 4 ‐Hg 2+ at 13.4° suggested that Hg 2+ ions might be trapped into the in‐plane heptazine holes. Computational studies of g‐C 3 N 4 ‐Hg 2+ nanoparticles confirmed large binding energies for in‐plan‐Hg 2+ structures and suggested that the fluorescence quenching (at 368 nm) is caused by the complexation of nanoparticles with Hg 2+ ions. Due to the strong affinity between Hg 2+ and CN − confirmed by computational studies, the quenched fluorescence emission at 368 nm “OFF” can be completely returned “ON” in the presence of CN − and then efficiently quenched by the addition of Hg 2+ . The OFF‐ON‐OFF fluorescence cycles have been exploited to design an “INHIBIT” logic gate using Hg 2+ and CN − ions. In addition, the second emission peak (at 450 nm) was quenched by Cr 2 O 7 2− and was not affected by other ions (Hg 2+ and CN − ) indicating a “NOT” (inverter) logic gate.