An N-rich metal-organic framework with an rht topology: high CO2 and C2 hydrocarbons uptake and selective capture from CH4.
We report the storage capacities and separation selectivity of an rht-type s-heptazine-based metal organic framework (MOF), [Cu3(TDPAH)(H2O)3]·13H2O·8DMA, 1, (where TDPAH is 2,5,8-tris(3,5-dicarboxylphenylamino)-s-heptazine and DMA is N,N-dimethylacetamide) for C2 hydrocarbons and CO2 over CH4. MOF 1 displays the highest C2H2/CH4 selectivity of 80.9 as well as record high C2H4 and C2H6 adsorption enthalpies. Theoretical calculations reveal that s-heptazine and NH groups within the framework have synergistic effects on CO2 binding.
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China. zshi@mail.jlu.edu.cn.
Kang
K
Liu
Baiyan
B
Li
Yi
Y
Li
Xu
X
Li
Fen
F
Yang
Guang
G
Zeng
Yu
Y
Peng
Zhijuan
Z
Zhang
Guanghua
G
Li
Zhan
Z
Shi
Shouhua
S
Feng
Datong
D
Song