NDLI: $C_{2}H_{2}$ adsorption in three isostructural metal–organic frameworks: boosting $C_{2}H_{2}$ uptake by rational arrangement of nitrogen sites

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Jiao, Jingjing Song, Chengling Lin, Qiyi He, Yabing Liu, Huimin
Description	Author Affiliation: Song C ( College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China. heyabing@zjnu.cn.)
Abstract	Replacing the benzene spacer in the organic linker 5,5′-(benzene-1,4-diyl)diisophthalate with the nitrogen containing heterocyclic rings, namely, pyrazine, pyridazine, and pyrimidine results in three organic linkers, which were reacted with copper ions under solvothermal conditions to form three isostructural metal–organic frameworks (ZJNU-46, ZJNU-47 and ZJNU-48) exhibiting exceptionally high sorption capacities with regard to acetylene due to the simultaneous immobilization of open metal sites and Lewis basic nitrogen sites in the frameworks. At 1 atm and 295 K, the gravimetric $C_{2}H_{2}$ adsorption uptakes reach 187, 213 and 193 $cm^{3}$ (STP) $g^{−1}$ for these three compounds. The gravimetric $C_{2}H_{2}$ adsorption amount of ZJNU-47a is the second highest reported for MOF materials. Notably, despite their same porosities, and densities of open metal sites and uncoordinated nitrogen sites, distinctly different $C_{2}H_{2}$ adsorption capacities were observed for these three compounds, which we think are mainly associated with the difference in the relative position of nitrogen atoms leading to different binding affinities of the frameworks towards $C_{2}H_{2}$ guest molecules, and thus different $C_{2}H_{2}$ adsorptions. This work demonstrates that the rational arrangement of open nitrogen sites will favorably improve the $C_{2}H_{2}$ uptake and thus provides useful information for future design of porous MOFs with high acetylene storage capacities.
ISSN	14779226
Issue Number	11
Journal	Dalton Trans.
Volume Number	45
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2016-03-21
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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