[18]/[20]π Hemiporphyrazine: A Redox-Switchable Near-Infrared Dye
摘要:
An aromatic hemiporphyrazine with an 18 pi-electron structure has been synthesized by oxidizing 20 pi-electron 8,10,21,23-tetrahydroxy-28,30-dicarba-27H,29H-hemiporphyrazine with bulky aryl ether substituents. The aromatic nature of the oxidized form was characterized by means of various spectroscopic methods and single-crystal X-ray analysis, with the help of quantum-chemical calculations. The oxidized hemiporphyrazine exhibited an intense absorption at similar to 850 nm. The redox process was found to be reversible.
作者:Joseph Y. M. Chan、Takahiro Kawata、Nagao Kobayashi、Dennis K. P. Ng
DOI:10.1002/anie.201811420
日期:2019.2.18
led to the formation of the corresponding core‐expanded boron(III) subphthalocyanineanalogues. These air‐stable π‐conjugated boron(III) carbazosubphthalocyanines possess two boron‐containing seven‐membered‐ringunits and a 16 π‐electron skeleton, and represent the first examples of antiaromatic boron(III) subphthalocyanineanalogues as supported by spectroscopic and theoretical studies. The molecular