3 years ago

Doubly N-Confused [36]Octaphyrin(1.1.1.1.1.1.1.1): Isomerization, Bis-Metal Coordination, and Topological Chirality

Doubly N-Confused [36]Octaphyrin(1.1.1.1.1.1.1.1): Isomerization, Bis-Metal Coordination, and Topological Chirality
Takafumi Yoshino, Hiroyuki Furuta, Masatoshi Ishida, Iti Gupta, Satoru Karasawa, Shigeki Mori, Koki Mitsuno
A novel [36]octaphyrin analogue embedding two N-confused pyrrole units demonstrated unique prototropy-coupled isomerization between the Figure-of-eight and dumbbell conformers. Upon bis-metal coordination, fixation of fully π-conjugated Figure-of-eight structures was achieved as referred from the X-ray crystal structure. Chirogenesis of the helical enantiomers was proved by intense circular dichroism (CD) response in the near infrared (NIR) region. Eight-figured chirality: A novel [36]octaphyrin analogue embedding two N-confused pyrrole units demonstrates unique prototropy-coupled isomerization. Upon bis-metal complexation, fully π-conjugated, helical Figure-of-eight structures are realized. Distinct CD response in the NIR region confirms chirogenesis of the helical enantiomers.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201708253

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