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Synthesis, Structures, and Photophysical Properties of Alternating Donor-Acceptor Cycloparaphenylenes
Shuhei Nishigaki1, Miho Fukui1,2, Haruki Sugiyama3
1Department of Chemical Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|April 13, 2017
Abstract:
The synthesis of alternating donor-acceptor [12] and [16]cycloparaphenylenes (CPPs) has been achieved by the rhodium-catalyzed intermolecular cross-cyclotrimerization followed by imidation and/or aromatization. These alternating donor-acceptor CPPs showed positive solvatofluorochromic properties and smaller HOMO-LUMO gaps compared with nonfunctionalized CPPs, which was confirmed by the theoretical study.