期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 46, 页码 14474-14478出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201707446
关键词
C-H activation; C-H amidation; polymerization; polysulfonamides; proton transfer
资金
- Creative Research Initiative Grant
- Creative Material Discovery
- NRF
- National Instrumentation Center for Environmental Management (NICEM)
- National Center for Inter-University Research Facilities (NCIRF) at Seoul National University
We report a powerful strategy for activation of C-H bonds to produce polysulfonamides by an atom-economical and green method using iridium-catalyzed direct C-H amidation polymerization (DCAP). After screening various directing groups, additives, silver salts, concentrations, and temperatures to optimize DCAP, high-molecular-weight (up to 149 kDa) and defect-free polysulfonamides were synthesized from various bis-sulfonyl azides. Although these polymers do not have conventional fluorescent conjugated cores, they emit blue light with large Stokes shifts and high quantum yields upon photoexcitation owing to an excited-state intramolecular proton-transfer process.
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