Photochromic property of anionic spiropyran with sulfonate-substituted indoline moiety

Akira Sugahara, Naru Tanaka, Atsushi Okazawa, Nobuyuki Matsushita, Norimichi Kojima*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


For fabricating photoresponsive multifunctional materials, we have developed the potassium salt of a new anionic spiropyran, 1′,3′, 3′-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2′-indoline] -5′-sulfonate (1-), with the sulfonate group present on the indoline moiety and whose crystal structure was revealed by single-crystal X-ray diffraction analysis. The photochromism of 1·K was demonstrated at room temperature in the KBr-diluted state, as well as in solution. The protonated spiropyran 1H shows negative photochromism.

Original languageEnglish
Pages (from-to)281-283
Number of pages3
JournalChemistry Letters
Issue number3
Publication statusPublished - 2014
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)


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