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Fine‐Tuning of the Carbon Dioxide Capture Capability of Diamine‐Grafted Metal–Organic Framework Adsorbents Through Amine Functionalization
Author(s) -
Jo Hyuna,
Lee Woo Ram,
Kim Nam Woo,
Jung Hyun,
Lim Kwang Soo,
Kim Jeong Eun,
Kang Dong Won,
Lee Hanyeong,
Hiremath Vishwanath,
Seo Jeong Gil,
Jin Hailian,
Moon Dohyun,
Han Sang Soo,
Hong Chang Seop
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201601203
Subject(s) - surface modification , amine gas treating , ethylenediamine , diamine , adsorption , flue gas , metal organic framework , metal , sonication , chemistry , chemical engineering , materials science , polymer chemistry , organic chemistry , inorganic chemistry , chromatography , engineering
A combined sonication and microwave irradiation procedure provides the most effective functionalization of ethylenediamine (en) and branched primary diamines of 1‐methylethylenediamine (men) and 1,1‐dimethylethylenediamine (den) onto the open metal sites of Mg 2 (dobpdc) ( 1 ). The CO 2 capacities of the advanced adsorbents 1‐en and 1‐men under simulated flue gas conditions are 19 wt % and 17.4 wt %, respectively, which are the highest values reported among amine‐functionalized metal‐organic frameworks (MOFs) to date. Moreover, 1‐den exhibits both a significant working capacity (12.2 wt %) and superb CO 2 uptake (11 wt %) at 3 % CO 2 . Additionally, this framework showcases the superior recyclability; ultrahigh stability after exposure to O 2 , moisture, and SO 2 ; and exceptional CO 2 adsorption capacity under humid conditions, which are unprecedented among MOFs. We also elucidate that the performance of CO 2 adsorption can be controlled by the structure of the diamine ligands grafted such as the number of amine end groups or the presence of side groups, which provides the first systematic and comprehensive demonstration of fine‐tuning of CO 2 uptake capability using different amines.