Preparation of photochromic cellulose derivatives containing spirobenzopyran

Myong Hoon Lee, Xiangdan Li, Eunkyoung Kim

Research output: Contribution to journalConference article

6 Citations (Scopus)

Abstract

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
Volume349
DOIs
Publication statusPublished - 2000 Jan 1
EventProceedings of the Korea-Japan Joint Forum 1999 Organic Materials for Electronics and Photonics - Kyongju, South Korea
Duration: 1999 Sep 91999 Sep 11

Fingerprint

Cellulose derivatives
cellulose
Cellulose
Substitution reactions
preparation
acetates
substitutes
Light sources
Derivatives
light sources
acetylcellulose

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

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title = "Preparation of photochromic cellulose derivatives containing spirobenzopyran",
abstract = "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.",
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T1 - Preparation of photochromic cellulose derivatives containing spirobenzopyran

AU - Lee, Myong Hoon

AU - Li, Xiangdan

AU - Kim, Eunkyoung

PY - 2000/1/1

Y1 - 2000/1/1

N2 - 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.

AB - 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.

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DO - 10.1080/10587250008024863

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