Tuning CO2 Uptake and Reversible Iodine Adsorption in Two Isoreticular MOFs through Ligand Functionalization |
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| Authors: | Srinivasulu Parshamoni Suresh Sanda Dr Himanshu Sekhar Jena Prof?Dr Sanjit Konar |
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| Affiliation: | Department of Chemistry, Indian Institute Of Science Education and Research, Indore By‐pass Road, Bhauri, Bhopal‐462066, Madhya Pradesh (India), Fax: (+91)?755‐6692392 |
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| Abstract: | The synthesis and characterization of two isoreticular metal–organic frameworks (MOFs), {Cd(bdc)(4‐bpmh)]}n?2 n(H2O) ( 1 ) and {Cd(2‐NH2bdc)(4‐bpmh)]}n?2 n(H2O) ( 2 ) bdc=benzene dicarboxylic acid; 2‐NH2bdc=2‐amino benzene dicarboxylic acid; 4‐bpmh=N,N‐bis‐pyridin‐4‐ylmethylene‐hydrazine], are reported. Both compounds possess similar two‐fold interpenetrated 3D frameworks bridged by dicarboxylates and a 4‐bpmh linker. The 2D Cd‐dicarboxylate layers are extended along the a‐axis to form distorted square grids which are further pillared by 4‐bpmh linkers to result in a 3D pillared‐bilayer interpenetrated framework. Gas adsorption studies demonstrate that the amino‐functionalized MOF 2 shows high selectivity for CO2 (8.4 wt % 273 K and 7.0 wt % 298 K) over CH4, and the uptake amounts are almost double that of non‐functional MOF 1 . Iodine (I2) adsorption studies reveal that amino‐functionalized MOF 2 exhibits a faster I2 adsorption rate and controlled delivery of I2 over the non‐functionalized homolog 1 . |
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| Keywords: | gas adsorption interpenetrated frameworks metal– organic frameworks isoreticular MOFs reversible iodine adsorption selective sorption |
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