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Chemical Conversion of Linkages in Covalent Organic Frameworks

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.6b08377· OSTI ID:1464142
 [1];  [1];  [1];  [1];  [2];  [3]
  1. Univ. of California, Berkeley, CA (United States). Berkeley Global Science Inst. and Kavli Energy NanoSciences Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  3. Univ. of California, Berkeley, CA (United States). Berkeley Global Science Inst. and Kavli Energy NanoSciences Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); King Fahd Univ. of Petroleum and Minerals, Dhahran (Saudi Arabia)
The imine linkages of two layered, porous covalent organic frameworks (COFs), TPB-TP-COF ([C6H3(C6H4N)3]2[C6H4(CH)2]3, 1) and 4PE-1P-COF ([C2(C6H4N)4][C6H4(CH)2]2, 2), have been transformed into amide linkages to make the respective isostructural amide COFs 1' and 2' by direct oxidation with retention of crystallinity and permanent porosity. Remarkably, the oxidation of both imine COFs is complete, as assessed by FT-IR and13C CP-MAS NMR spectroscopy and demonstrates (a) the first chemical conversion of a COF linkage and (b) how the usual “crystallization problem” encountered in COF chemistry can be bypassed to access COFs, such as these amides, that are typically thought to be difficult to obtain by the usual de novo methods. The amide COFs show improved chemical stability relative to their imine progenitors.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
BASF SE, Germany; National Science Foundation (NSF); Saudi Aramco, Saudi Arabia; US Army Research Office (ARO); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; SC0001015
OSTI ID:
1464142
Journal Information:
Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 48 Vol. 138; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (15)

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Accessing the amide functionality by the mild and low-cost oxidation of imine journal July 2009
Chemistry of Covalent Organic Frameworks journal November 2015
Sequential Pore Wall Modification in a Covalent Organic Framework for Application in Lactic Acid Adsorption journal January 2016
Moving Beyond Boron: The Emergence of New Linkage Chemistries in Covalent Organic Frameworks journal June 2016
Construction of Covalent Organic Framework for Catalysis: Pd/COF-LZU1 in Suzuki–Miyaura Coupling Reaction journal December 2011
Mechanistic Studies of Two-Dimensional Covalent Organic Frameworks Rapidly Polymerized from Initially Homogenous Conditions journal June 2014
One-Step Construction of Two Different Kinds of Pores in a 2D Covalent Organic Framework journal October 2014
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Molecular docking sites designed for the generation of highly crystalline covalent organic frameworks journal February 2016
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Catalytic covalent organic frameworks via pore surface engineering journal January 2014
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Cited By (9)

Transformation of a [4+6] Salicylbisimine Cage to Chemically Robust Amide Cages journal June 2019
BODIPY-Decorated Nanoscale Covalent Organic Frameworks for Photodynamic Therapy journal April 2019
Covalent Organic Frameworks as a Platform for Multidimensional Polymerization journal May 2017
Stable and ordered amide frameworks synthesised under reversible conditions which facilitate error checking journal October 2017
Topochemical conversion of an imine- into a thiazole-linked covalent organic framework enabling real structure analysis journal July 2018
Facile transformation of imine covalent organic frameworks into ultrastable crystalline porous aromatic frameworks journal July 2018
Real-Time Optical and Electronic Sensing with a β-Amino Enone Linked, Triazine-Containing 2D Covalent Organic Framework journal April 2019
Crystallization of Covalent Organic Frameworks for Gas Storage Applications journal July 2017
Covalent Organic Frameworks: From Materials Design to Biomedical Application journal December 2017

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