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Title: Visible-light harvesting pyrene-based MOFs as efficient ROS generators

Journal Article · · Chemical Science
DOI:https://doi.org/10.1039/C9SC03080H· OSTI ID:1547075
 [1];  [1]; ORCiD logo [1];  [1];  [2];  [1]; ORCiD logo [3]
  1. Department of Chemistry, Texas A&M University, College Station, USA
  2. Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, United State
  3. Department of Chemistry, Texas A&M University, College Station, USA, Department of Materials Science and Engineering

The utilization of reactive oxygen species (ROS) in organic transformations is of great interest due to their superior oxidative abilities under mild conditions. Recently, metal–organic frameworks (MOFs) have been developed as photosensitizers to transfer molecular oxygen to ROS for photochemical synthesis. However, visible-light responsive MOFs for oxygen activation remains scarce. Now we design and synthesize two porous MOFs, namely, PCN-822(M) (M = Zr, Hf), which are constructed by a 4,5,9,10-(K-region) substituted pyrene-based ligand, 4,4',4'',4'''-((2,7-di-tert-butylpyrene-4,5,9,10-tetrayl)tetrakis(ethyne-2,1-diyl))-tetrabenzoate (BPETB4-). With the extended π-conjugated pyrene moieties isolated on the struts, the derived MOFs are highly responsive to visible light, possessing a broad-band adsorption from 225–650 nm. As a result, the MOFs can be applied as efficient ROS generators under visible-light irradiation, and the hafnium-based MOF, PCN-822(Hf), can promote the oxidation of amines to imines by activating molecular oxygen via synergistic photo-induced energy and charge transfer.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS); Texas A & M Univ., College Station, TX (United States); Univ. of California, Oakland, CA (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
FE0026472; SC0001015
OSTI ID:
1547075
Alternate ID(s):
OSTI ID: 1614296
Journal Information:
Chemical Science, Journal Name: Chemical Science Vol. 10 Journal Issue: 36; ISSN 2041-6520
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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