Effect of photo irradiation on the refractive indices of spirobenzopyran film

Eunkyoung Kim, Yun Ki Choi, Myung Hyun Lee, Sun Gyu Han, Sam Rock Keum

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The effect of photo irradiation on the refractive index of spirobenzopyran (SP) polymer was investigated. Spirobenzopyran polymers were prepared by a radical polymerization using 6-(p-methacryloyloxy-hexyloxyphenyl)carbonylspirobenzopyran, styrene, and butylmethacrylate. Films with spirobenzopyran polymers showed color change from pale yellow to deep blue upon irradiation of a monochromatic light of 340 nm. The colored films were bleached either spontaneously or by light of 580 nm. The refractive index changes of the spirobenzopyran polymers were 5×10 -4 and 9×10 -4 for 20 wt% and 35 wt% of the spirobenzopyran content, respectively.

Original languageEnglish
Pages (from-to)S615-S617
JournalJournal of the Korean Physical Society
Issue numberSUPPL. 2
Publication statusPublished - 1999

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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