期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 27, 期 32, 页码 8268-8272出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202100789
关键词
cyclooctadiene; iridium; NIR absorption; oxidation; porphyrin analog
资金
- JSPS KAKENHI [JP19K05439, JP19H04586, JP20H00406]
- Konica Minolta Science and Technology Foundation
NFP can form a ring-opened iridium complex and a cod-isomerized iridium complex under oxidative and inert conditions, respectively.
N-fused porphyrin (NFP) is a unique class of photostable near-infrared dyes with an 18 pi aromatic tetrapyrrole macrocyclic skeleton containing a tri-fused pentacyclic moiety. Here, the synthesis of an iridium complex of N-fused bilatrienone is reported as the degradation product of Ir-cyclooctadiene (cod)-induced oxidative cleavage of NFP under aerobic conditions. Similar to the native bilin chromophores, the ring-opened complex featured a broken pi-conjugation circuit and exhibited a broad visible absorption band. In contrast, metalation of NFP using an iridium(I)(cod) complex under an inert atmosphere resulted in the formation of a cod-isomerized (kappa(1),eta(3)-C8H12)-Ir complex.
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