Premium
Effect of Benzene Derivatives as Guest Molecules on Semiconductor Properties of MOF‐199
Author(s) -
Zahadiya Haleemathul,
Wijesundera Ruwan P.,
Hettiarachchi Champika V.,
Perera Ishanie R.
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202004528
Subject(s) - powder diffraction , materials science , molecule , band gap , semiconductor , infrared spectroscopy , benzene , aniline , fourier transform infrared spectroscopy , doping , organic semiconductor , chemistry , analytical chemistry (journal) , crystallography , chemical engineering , organic chemistry , optoelectronics , engineering
A metal organic framework, MOF‐199, has been synthesized under solvothermal conditions. Powder X‐ray diffraction (PXRD) pattern, Fourier‐transform infrared spectra (FT‐IR) and scanning electron microscopic images (SEM) confirmed the formation of the expected MOF‐199 structure. The semiconductor properties of MOF‐199 were then fine‐tuned by introducing three benzene derivatives as guest molecules (aniline, m ‐aminobenzoic acid and p ‐benzoquinone). Modified MOF‐199 samples were characterized using PXRD and FT‐IR. Mott‐Schottky analysis and solid‐state UV‐visible spectroscopy were used to investigate the semiconductor properties of these materials. Once MOF was modified with benzene derivatives, slight changes in d spacing values of PXRD patterns and appearance of new peaks in FT‐IR spectra were observed. The Mott‐Schottky analysis of modified MOF‐199 demonstrated an enhancement in the carrier concentration up to 83 % and a negative potential shift of the flat band potential compared to pure MOF‐199, indicating a higher degree of band bending. According to the solid‐state UV‐visible spectra, doping with organic molecules reduced the bandgap in modified MOF‐199. Thus, this study evidently showcases the potential of fine‐tuning the semiconductor properties of a MOF according to the requirement that allows a single MOF to be utilized in a variety of applications with a simple modification.