Molecular crystals based on 9,10-distyrylanthracene derivatives with high solid state fluorescence efficiency and uniaxial orientation induced by supramolecular interactionsReportar como inadecuado




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Chinese Science Bulletin

, Volume 58, Issue 22, pp 2747–2752

First Online: 11 June 2013Received: 29 January 2013Accepted: 09 April 2013DOI: 10.1007-s11434-013-5897-9

Cite this article as: Chen, J., Ma, S., Xu, B. et al. Chin. Sci. Bull. 2013 58: 2747. doi:10.1007-s11434-013-5897-9

Abstract

Two 9,10-distyrylanthracene DSA derivatives CNDSA and t-BUDSA were designed and synthesized, and their photophysical properties and crystal structures were investigated. Compared to DSA, the maximum emission peaks of the two compounds showed red-shift not only in THF solution, but also in crystals, because the introduction of electron-withdrawing substituents to DSA leads to more dispersion of the electrons in the molecules. The two crystals of CNDSA and t-BUDSA show strong fluorescence with the efficiency ΦF of 45% and 33%, respectively, which may be resulted from no obvious π-π interactions between molecules inside the crystal due to the large distance between the two adjacent molecules and nearly no overlap between the central anthracene planes. The analysis of crystal structures of the two compounds indicated that the molecules are arranged in the same conformation and orientation in their crystals, i.e. uniaxially oriented packing crystal, because of the supramolecular interaction of CH-π in the two crystals and additional C-H…N interactions in CNDSA.

Keywords9,10-distyrylanthracene derivatives high solid state fluorescence efficiency uniaxially oriented packing This article is published with open access at Springerlink.com

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Autor: JinLong Chen - SuQian Ma - Bin Xu - JiBo Zhang - YuJie Dong - WenJing Tian

Fuente: https://link.springer.com/







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