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Effect of Functional Groups on the I 2 Sorption Kinetics of Isostructural Metal–Organic Frameworks
Author(s) -
Lee Byeongchan,
Park Jinhee
Publication year - 2021
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.12201
Subject(s) - isostructural , sorption , kinetics , chemistry , adsorption , metal organic framework , chemisorption , crystallography , crystal structure , physics , quantum mechanics
In this work, the effect of functional groups on I 2 sorption kinetics is investigated using two different types of isostructural metal‐organic frameworks, UiO‐66‐X series (X = H, Br, NO 2 , NH 2 , (OH) 2 , and (COOH) 2 ) and M 2 ( m ‐DOBDC) series, (M = Co2+, Mg2+, and Ni2+; m ‐DOBDC 4− = 4,6‐dioxo‐1,3‐benzenedicarboxylate). Among the UiO‐66‐X series, UiO‐66‐(COOH) 2 exhibits the fastest sorption kinetics and the highest sorption capacity due to dipole‐induced dipole interactions between carboxylic acid groups and I 2 molecules. In addition, faster I 2 chemisorption is observed in M 2 ( m ‐DOBDC) because of electrophilic aromatic substitution of m ‐DOBDC 4− with I 2 . The I 2 sorption mechanisms are further supported by fitting the I 2 adsorption kinetics data to pseudo‐first‐order and pseudo‐second‐order kinetic models.