High-throughput synthesis of zeolitic imidazolate frameworks and application to CO2 capture.
A high-throughput protocol was developed for the synthesis of zeolitic imidazolate frameworks (ZIFs). Twenty-five different ZIF crystals were synthesized from only 9600 microreactions of either zinc(II)/cobalt(II) and imidazolate/imidazolate-type linkers. All of the ZIF structures have tetrahedral frameworks: 10 of which have two different links (heterolinks), 16 of which are previously unobserved compositions and structures, and 5 of which have topologies as yet unobserved in zeolites. Members of a selection of these ZIFs (termed ZIF-68, ZIF-69, and ZIF-70) have high thermal stability (up to 390 degrees C) and chemical stability in refluxing organic and aqueous media. Their frameworks have high porosity (with surface areas up to 1970 square meters per gram), and they exhibit unusual selectivity for CO2 capture from CO2/CO mixtures and extraordinary capacity for storing CO2: 1 liter of ZIF-69 can hold approximately 83 liters of CO2 at 273 kelvin under ambient pressure.
Banerjee
Rahul
R
Center for Reticular Chemistry at California NanoSystems Institute, Department of Chemistry and Biochemistry, University of California at Los Angeles, 607 East Charles E. Young Drive, Los Angeles, CA 90095, USA. rahul@chem.ucla.edu
Phan
Anh
A
Wang
Bo
B
Knobler
Carolyn
C
Furukawa
Hiroyasu
H
O'Keeffe
Michael
M
Yaghi
Omar M
OM