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Multi-stimuli response of a novel half-cut cruciform and its application as a security ink
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lu, Xiaolin |
| Copyright Year | 2016 |
| Abstract | (E)-2′-[2-(Benzo[d]thiazol-2-yl)vinyl]-N,N-dimethyl-(1,1′-biphenyl)-4-amine 2, a novel V-shaped molecule (i.e. a half-cut cruciform), and its line-shaped isomer, (E)-4′-[2-(benzo[d]thiazol-2-yl)vinyl]-N,N-dimethyl-[1,1′-biphenyl]-4-amine 4, were successfully prepared via a two-step route of Suzuki coupling and Witting reaction. The much more profound ICT effect on 2 than on 4 means that the former has largely reduced quantum yields in highly polar solvents, in which AIE effect is enhanced for 2 but not for 4. Morphology-dependent fluorochromism in highly contrasted colours induced by mechanical force or surrounding pH stimuli can reversibly occur on 2 but not on 4. X-ray crystallography revealed loose molecular packing caused by the twisted conformation of 2, which is assumed to account for the intense solid-state emission and mechano-chromic activity. An organic solution of 2 and CF3COOH mixture shows potential for use as a security ink without the need for a covering reagent. |
| Starting Page | 9350 |
| Ending Page | 9358 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| Volume Number | 4 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c6/tc/c6tc02618d/c6tc02618d1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C6TC02618D |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
