Efficient
gas separation and purification play a vital role in
the current advanced development of industry, and the application
of MOF adsorbents in this area with highly technical materials shows
obvious advantages. On the basis of reticular chemistry, the 4-c lvt
MOF adsorbent [CuDTTA]·3DMF·CH3CN has been constructed
(CuDTTA; H2DTTA = 2,5-bis(1H-1,2,4-triazol-1-yl)terephthalic
acid). CuDTTA reveals a multiple-micropore system and high-density
active sites decorated on the channel surfaces, which are conducive
to its extraordinary selectivity of CO2/CH4 and
C2H2/CH4 (29 and 166, 1:1). In combination
with an analysis of Q
st values, CuDTTA
possesses the synergistic effect of size sieving and abundant functional
sites, significantly improving the gas adsorption and separation performance.
Meanwhile, the results also reveal that functional sites have a stronger
binding affinity toward C2H2 with respect to
CO2. Such a conclusion renders CuDTTA to be a promising
adsorbent material for industrial applications.
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