Imidazolium-Functionalized Chemically Robust Ionic Porous Organic Polymers (iPOPs) toward Toxic Oxo-Pollutants Capture from Water.

Autor: Sen A; Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, Dr. HomiBhabha Road, Pashan, Pune 411008, India., Dutta S; Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, Dr. HomiBhabha Road, Pashan, Pune 411008, India., Dam GK; Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, Dr. HomiBhabha Road, Pashan, Pune 411008, India., Samanta P; Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, Dr. HomiBhabha Road, Pashan, Pune 411008, India., Let S; Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, Dr. HomiBhabha Road, Pashan, Pune 411008, India., Sharma S; Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, Dr. HomiBhabha Road, Pashan, Pune 411008, India., Shirolkar MM; Symbiosis Center for Nanoscience and Nanotechnology (SCNN), Symbiosis International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India., Ghosh SK; Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, Dr. HomiBhabha Road, Pashan, Pune 411008, India.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2021 Sep 20; Vol. 27 (53), pp. 13442-13449. Date of Electronic Publication: 2021 Aug 06.
DOI: 10.1002/chem.202102399
Abstrakt: Fabricating new and efficient materials aimed at containment of water contamination, in particular removing toxic heavy metal based oxo-anions (e. g. CrO 4 2- , TcO 4 - ) holds paramount importance. In this work, we report two new highly stable imidazolium based ionic porous organic polymers (iPOPs) decorated with multiple interaction sites along with electrostatics driven adsorptive removal of such oxo-anions from water. Both the iPOPs (namely, iPOP-3 and iPOP-4) exhibited rapid sieving kinetics and very high saturation uptake capacity for CrO 4 2- anions (170 and 141 mg g -1 for iPOP-3 and iPOP-4 respectively) and ReO 4 - (515.5 and 350.3 mg g -1 for iPOP-3 and iPOP-4 respectively), where ReO 4 - anions being the non-radioactive surrogative counterpart of radioactive TcO 4 - ions. Noticeably, both iPOPs showed exceptional selectivity towards CrO 4 2- and ReO 4 - even in presence of several other concurrent anions such as Br - , Cl - , SO 4 2- , NO 3 - etc. The theoretical binding energy calculations via DFT method further confirmed the preferential interaction sites as well as binding energies of both iPOPs towards CrO 4 2- and ReO 4 - over all other competing anions which corroborates with the experimental high capacity and selectivity of iPOPs toward such oxo-anions.
(© 2021 Wiley-VCH GmbH.)
Databáze: MEDLINE
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