Abstract
Porous materials based on aluminum(III) 2-aminoterephthalate metal organic frameworks (MOFs NH2MIL101(Al) and NH2MIL53(Al)) and their composites with aluminum isopropoxide (Al-i-Pro) are studied as sorbents of vapors of volatile aldehydes and catalysts of acetaldehyde dimerization to ethyl acetate via the Tischenko reaction. MOF/Al-i-Pro composites obtained by simple impregnation of the MOFs with hydrocarbon solutions of Al-i-Pro are stable due to the formation of bonds between the MOF carbonyls and Al-i-Pro. The specific BET surface areas of the MOFs NH2MIL101(Al) and NH2MIL53(Al) ranged from 1650 to 1980 and 670–780 m2/g, respectively, and were lowered 6–12-fold by impregnation of Al-i-Pro into the MOF pores. However, the acetaldehyde and acrolein uptake by the MOF/Al-i-Pro composites from saturated vapor atmosphere is comparable to that of their respective parent MOFs and exceeds the aldehyde uptake of activated carbon or molecular sieves. Due of the propensity of the Al-i-Pro to catalyze dimerization ...
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