Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
177724 | Dyes and Pigments | 2008 | 5 Pages |
Abstract
A new water-soluble near-infrared (NIR) absorbing croconium dye, 2,5-bis[(4-carboxylic-piperidylamino)thiophenyl]-croconium, was synthesised by condensing croconic acid with 2-(4-carboxylic-piperidylamino)thiophene and characterised by 1H NMR, high-resolution MS and UV–vis spectra. The dye showed a sharp and intense absorption band peaking near 800 nm and little absorption in visible region in several water-soluble polymers. It also exhibited excellent photostability in water, methanol and in the plastic films. Due to its good water solubility, a water-based coating process was developed to make NIR blocking plastic filters for use as attenuators of stray light in NIR laser systems.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Xiangzhi Song, James W. Foley,