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SUMMARY:Development of Highly Reducing Visible-Light Photocatalysts for Org
 anocatalyzed Atom Transfer Radical Polymerization
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20184101T000000
UID:2026-04-24-00-35-02@natsci.colostate.edu
DTSTAMP:20260424T003502
Description:Organocatalyzed atom transfer radical polymerization (O-ATRP) h
 as become a powerful methodology for the synthesis of well-defined polymer
 s in a highly efficient manner. This process is made possible due to the a
 dvent of highly reducing organic photoredox catalysts (PCs) which are driv
 en by visible light. The family of N\,N-diaryl dihydrophenazine PCs have b
 een shown to polymerize methacrylate monomers to polymers of dispersity co
 mmonly lower than 1.10\, with quantitative initiator efficiency. Quantum c
 hemical calculations have been used to realize N\,N-diaryl dihydrophenazin
 es that access a photoinduced intramolecular charge transfer excited state
 \, reminiscent of the metal-to-ligand charge transfer observed in iridium 
 and ruthenium polypyridal PCs. The combination of theoretical and experime
 ntal investigations reveal the importance of this charge transfer characte
 ristic for O-ATRP\, which is used as a design principle to further develop
  new catalyst families inspired by the N\,N-diaryl dihydrophenazines. 4:00
  pm
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