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0D to 3D Pr III metal–organic networks crystal engineered for optimal iodine adsorption
Author(s) -
Moghzi Faezeh,
Soleimannejad Janet,
Emadi Hamid,
Janczak Jan
Publication year - 2020
Publication title -
acta crystallographica section b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.604
H-Index - 33
ISSN - 2052-5206
DOI - 10.1107/s2052520620009336
Subject(s) - chemistry , adsorption , ligand (biochemistry) , pyrazine , piperazine , metal , pyridine , solvent , iodine , molecule , dicarboxylic acid , inorganic chemistry , medicinal chemistry , crystallography , polymer chemistry , stereochemistry , organic chemistry , receptor , biochemistry
Four new praseodymium(III) metal–organic compounds varying in dimensionality from 0D to 3D have been designed and synthesized based on N‐heterocyclic polycarboxylic acids, including pyridine‐2,6‐dicarboxylic acid (H 2 pydc) and pyrazine‐2,3‐dicarboxylic acid (H 2 pzdc). Altering the concentration of piperazine (pip, ancillary ligand) enables control over the dimensionality of the compound by switching between the 0D [H 2 pip][Hpip][Pr(pydc) 3 ]·4H 2 O ( I ) and the 1D {[Pr(pydc)(Hpydc)(H 2 O) 2 ]·4H 2 O} n ( II ) coordination polymer (CP). Upon replacing H 2 pydc with H 2 pzdc, CP II is converted to the 2D CP [Pr(pzdc)(Hpzdc)(H 2 O) 3 ] n ( III ) and using the metalloligand [Zn(Hpzdc) 2 (H 2 O) 2 ] 2− , the 3D heterometallic CP {[Pr 2 Zn(pzdc) 4 (H 2 O) 6 ]·2H 2 O} n ( IV ) is formed. Compound IV shows high stability in the absence of uncoordinated solvent molecules and is stable up to 400°C, even in the presence of humidity. Therefore, IV was utilized for iodine adsorption in the vapour phase and in the presence of humidity. The results confirm the remarkable potential of IV for reversible adsorption of iodine vapour.