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A Porous Crystalline Nitrone-Linked Covalent Organic Framework

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [1];  [1];  [1];  [2];  [2];  [1];  [2];  [1];  [3]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of Chicago, IL (United States)
  3. Univ. of California, Berkeley, CA (United States); King Abdulaziz City for Science and Technology, Riyadh (Saudi Arabia)
Herein, we report the synthesis of a nitrone-linked covalent organic framework, COF-115, by combining N, N', N', N'''-(ethene-1, 1, 2, 2-tetrayltetrakis(benzene-4, 1-diyl))tetrakis(hydroxylamine) and terephthaladehyde via a polycondensation reaction. In this study, the formation of the nitrone functionality was confirmed by solid-state 13C multi cross-polarization magic angle spinning NMR spectroscopy of the 13C-isotope-labeled COF-115 and Fourier-transform infrared spectroscopy. The permanent porosity of COF-115 was evaluated through low-pressure N2, CO2, and H2 sorption experiments. Water vapor and carbon dioxide sorption analysis of COF-115 and the isoreticular imine-linked COF indicated a superior potential of N-oxide-based porous materials for atmospheric water harvesting and CO2 capture applications. Density functional theory calculations provided valuable insights into the difference between the adsorption properties of these COFs. Lastly, photoinduced rearrangement of COF-115 to the associated amide-linked material was successfully demonstrated.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); Defense Advanced Research Projects Agency (DARPA); National Science Foundation (NSF); National Institutes of Health (NIH)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2422608
Alternate ID(s):
OSTI ID: 1995557
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 36 Vol. 62; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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