Abdollahi MF, Zhao Y. Structural Tuning of Curved TTFAQ-AQ as a Redox-Active Supramolecular Partner for C
70 Fullerene.
J Org Chem 2021;
86:14855-14865. [PMID:
34633192 DOI:
10.1021/acs.joc.1c01633]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of saddle-shaped donor-acceptor π-systems, termed TTFAQ-AQs, were designed and synthesized. The molecular structures of TTFAQ-AQs feature a π-fused framework containing an anthraquinodimethane extended tetrathiafulvalene (TTFAQ) as the donor and an anthraquinone (AQ) unit as the acceptor. As such, TTFAQ-AQs show enhanced intramolecular charge-transfer properties, which result in amphoteric redox behavior and narrow electronic energy band gaps. Detailed structural and electronic properties were investigated by UV-vis absorption, cyclic voltammetric, and single-crystal X-ray diffraction (SCXRD) analyses. The supramolecular interactions of TTFAQ-AQs with C60 and C70 fullerenes were examined in both the solution and solid phases. Our results showed that the benzoannulated TTFAQ-AQ derivative favors interaction with C70 fullerene through complementary concave-convex interactions. Detailed energetics involved in the TTFAQ-AQ/C70 interactions were assessed by means of density functional theory (DFT) calculations.
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