Preparation of photochromic cellulose derivatives containing spirobenzopyran

Myong Hoon Lee, Xiangdan Li, Eunkyoung Kim

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)


New cellulose acetate derivatives substituted with 6-(p-alkoxyphenyl)carbonyl-spirobenzopyran (COSP) were prepared from base-catalyzed etherification of cellulose acetate by 6-(p-bromohexyloxyphenyl)carbonylspirobenzopyran. The degree of COSP substitution was controlled by the feed amount of COSP and reached to max. 46 wt%. Tg of the resultant COSP bound cellulose (CA-COSP) was increased as the COSP substitution is increased. CA-COSP was soluble in aprotic polar solvents, to allow preparation of photochromic film by solution process. Reversible photochromic property was observed from the CA-COSP film by using two light sources of UV and visible light.

Original languageEnglish
Pages (from-to)51-54
Number of pages4
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Publication statusPublished - 2000
EventProceedings of the Korea-Japan Joint Forum 1999 Organic Materials for Electronics and Photonics - Kyongju, South Korea
Duration: 1999 Sept 91999 Sept 11

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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