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Homework Help: Photo reactive dye,

  1. Jul 8, 2011 #1
    1. The problem statement, all variables and given/known data

    im trying to identify photo reactive dye/ compound that changes color when exposed to light, i know of photochromic dyes, unfortunately photochromic dyes undergo a reversible change in appearance. is there a compound that changes in the presenc eof light irreversibly?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jul 8, 2011 #2


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    Staff: Mentor

    I Googled irreversible photochemical reactions, and got some good hits. Do any of these help?


  4. Jul 8, 2011 #3


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    Science Advisor
    2017 Award

    Look up caged dyes or photoactivable dyes.
  5. Jul 9, 2011 #4
    thanks berkeman, & Ygggdrasil nice name though i cant pronounce it, thats what i was looking for.
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