AI Article Synopsis
- 5-arylaminothiazoles with pyridyl groups demonstrate distinct color changes (halochromism and halofluorism) when exposed to Brønsted and Lewis acids.
- The introduction of triflic acid to these solutions leads to bathochromic shifts in absorption and emission, which DFT calculations attribute to the protonation of the pyridyl group.
- X-ray diffraction studies reveal conformational changes in the thiazole ring upon protonation, and adjusting dye ratios allows for the emission of white light, transitioning from blue to orange as per International Commission on Illumination coordinates.
Article Abstract
Solutions of 5--arylaminothiazoles containing pyridyl groups exhibited clear halochromism and halofluorism upon addition of Brønsted and Lewis acids. The addition of triflic acid to solutions of 5--arylaminothiazoles in EtO induced bathochromic shifts of the absorption and emission bands. DFT calculations suggested that the spectral changes arise from the protonation of the pyridyl group of the thiazoles in EtO. Single-crystal X-ray diffraction analysis of a thiazole and its protonated form revealed the change of the conformation around the thiazole ring. The emission of white light was accomplished from a single fluorescent dye by adjusting the ratio of dye and B(CF), whereby the International Commission on Illumination coordinates showed a linear change from blue to orange.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5062007 | PMC |
| http://dx.doi.org/10.1002/open.201600059 | DOI Listing |
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