NDLI: The HOF structures of nitrotetraphenylethene derivatives provide new insights into the nature of AIE and a way to design mechanoluminescent materials

Content Provider	Royal Society of Chemistry (RSC)
Author	Liu, Siwei Mao, Zhu Yang, Zhiyong Chi, Zhenguo Huang, Qiuyi Xu, Jiarui Zhang, Yi Ou, Depei Chen, Junru Yu, Tao Bryce, Martin R.
Copyright Year	2017
Abstract	This study probes the effect of intramolecular rotations on aggregation-induced emission (AIE) and leads to a kind of supramolecular mechanoluminescent material. Two hydrogen-bonded organic frameworks (HOFs), namely HOFTPE3N and HOFTPE4N, have been constructed from nitro-substituted tetraphenylethene (TPE) building blocks, namely tris(4-nitrophenyl)phenylethene (TPE3N) and tetrakis(4-nitrophenyl)ethene (TPE4N). Using single-crystal X-ray diffraction analysis, two types of pores are observed in the HOFTPE4N supramolecular structure. The pore sizes are 5.855 Å × 5.855 Å (α pores) and 7.218 Å × 7.218 Å (β pores). Powder X-ray diffraction and differential scanning calorimetry studies further reveal that the α pores, which contain nitrophenyl rings, quench the emission of HOFTPE4N. This emission can be turned on by breaking the α pores in the HOFs by grinding the sample. Temperature-dependent emission studies demonstrate that the emission quenching of HOFTPE4N is attributed to the intramolecular rotations of nitro-substituted phenyl units within the space of the α pores. These results clearly reveal AIE by controlling the intramolecular rotations, which can serve as a basis for developing mechanoluminescent materials.
Starting Page	1163
Ending Page	1168
Page Count	6
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	8
Issue Number	2
Journal	Chemical Science
DOI	10.1039/c6sc03177c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	X-ray crystallography Differential scanning calorimetry Ethylene Phenyl group AIE
Content Type	Text
Resource Type	Article
Subject	Chemistry

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