I’m looking for an organic* material – a killer dye – with the following properties.
- Nice price. In other words, not something fancy from the latest issue of JACS.
- Commercial availability and in stock. Not in “8-12 weeks.”
- Chemical INSTABILITY towards light. Preferably at a defined wavelength. Say 254 nm; not in the visible spectrum. This is the most important feature. The material should break down to a colorless state under controllable conditions.
Nice to have
- Reasonable stability under ambient conditions (excluding light). Relative inertness towards air and moisture.
- Reversibility. If the discolored dye could be reversed back to its colored state, we are talking. In the best of worlds, using light at another defined wavelength. Optionally, using a second chemical component such as an oxidant or reductant. Or some other mechanism. I’m open to suggestions.
- Color. Not white or pale yellow. Anything else goes.
- Molecular weight. Both polymers and small molecules are OK.
- I can’t tell you what it’s for. Not now, and not later. That’s just life in industry. Sorry.
If a material springs to mind, I’m all ears! Thanks a million.
* N.B. I’m using the old definition of “organic.” The one that refers to chemistry.