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Synthesis and Properties of a Bay-Annulated-Indigo Tetramer Based on Low-Cost Spiro[Fluorene-9,9′-Xanthene] Core

1
College of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China
2
Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
*
Author to whom correspondence should be addressed.
Molecules 2019, 24(19), 3623; https://doi.org/10.3390/molecules24193623
Received: 9 September 2019 / Revised: 25 September 2019 / Accepted: 28 September 2019 / Published: 8 October 2019
(This article belongs to the Section Materials Chemistry)
A three-dimensional bay-annulated-indigo (BAI) tetramer has been prepared by appending BAI units onto a low-cost spiro[fluorene-9,9′-xanthene] (SFX) core. The target compound 4BAI-SFX exhibits strong and broad absorption in the visible region covering the range of 450~700 nm. The electrochemical measurement illuminates the characteristics of a deep lowest unoccupied molecular orbital (LUMO) level and multiple redox states of 4BAI-SFX. These results suggest that 4BAI-SFX should be a selectable electron-transporting material for eco-friendly organic semiconductors. View Full-Text
Keywords: bay-annulated indigo; spiro[fluorene-9,9′-xanthene]; synthesis; properties bay-annulated indigo; spiro[fluorene-9,9′-xanthene]; synthesis; properties
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MDPI and ACS Style

Ren, B.-Y.; Tan, Y.-M.; Sun, C.-L.; Sheng, Y.-G. Synthesis and Properties of a Bay-Annulated-Indigo Tetramer Based on Low-Cost Spiro[Fluorene-9,9′-Xanthene] Core. Molecules 2019, 24, 3623.

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