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Tetraphenylethene modified β-ketoiminate boron complexes bearing aggregation-induced emission and mechanofluorochromism
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gao, Huaizhi Xu, Defang Liu, Xingliang Han, Aixia Zhou, Lin Zhang, Chao Yang, Yan Li, Wenlin |
| Copyright Year | 2017 |
| Abstract | Two new tetraphenylethene modified β-ketoiminate boron complexes (TTPE-H and TTPE-CN) have been rationally designed and successfully synthesized. The two D–π–A type compounds exhibit typical twisted intramolecular charge-transfer (TICT) emission and evident aggregation-induced emission (AIE) characteristics, remarkable luminescence mechanochromism, and high solid state efficiency (up to 0.785 and 0.672). The mechanofluorochromic (MFC) behaviors of TTPE-H (from bright green to yellow-green emission, λem from 497 to 515 nm) and TTPE-CN (from bright yellow-green to yellow emission, λem from 525 to 565 nm) are reversible upon grinding and fuming treatments. From the X-ray diffraction and differential scanning calorimetry analyses, it was confirmed that the MFC properties of TTPE-H and TTPE-CN should be derived from a phase transition between crystalline and amorphous states. More interestingly, the compound TTPE-CN, which possesses a cyano group in the boron chelating ring, showed more contrast MFC behavior relative to TTPE-H. The reason is that the introduction of the cyano group can enhance the distortion degree of the molecule TTPE-CN because of steric hindrance. |
| Starting Page | 1348 |
| Ending Page | 1356 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C6RA25871A |
| Volume Number | 7 |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2017/ra/c6ra25871a |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c6/ra/c6ra25871a/c6ra25871a1.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
