Affiliation:
1. Collaborative Innovation Center of Advanced Nuclear Energy Technology Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 P. R. China
Abstract
AbstractSurface open polar sites within the voids of porous molecular crystals define the localized physicochemical environment for critical functions such as gas separation and molecular recognition. This study presents a new charge‐assisted hydrogen bonding (H‐bonding) motif, by exploiting inorganic ammonium (NH4+) cations as H‐bond donors, to regulate the assembly of C2‐symmetric carboxylic tectons for building robust H‐bonded frameworks with permanent ultra‐micropores and open oxygen sites. Diverse building blocks are bridged by tetrahedral NH4+to expand distinctive H‐bonded networks with varied pore architectures. Particularly, the open polar oxygen sites can be switched by altering NH4+sources to tune the deprotonation of carboxyl‐containing tectons. The activated porousPTBA·NH4·DMFpreserves the pore architecture and open polar oxygen sites, exhibiting remarkably selective sorption of CO2(107.8 cm3g−1,195 K) over N2(11.2 cm3g−1, 77 K) and H2(1.4 cm3g−1, 77 K).
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
4 articles.
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