126984-97-2Relevant academic research and scientific papers
A New Spiropyran-2,2'-2'H-1'-benzothiopyran> giving a Near-IR Absorption Band on UV Irradiation
Watanabe, Shigeru,Nakazumi, Hiroyuki,Maeda, Katsumi,Kitao, Teijiro
, p. 421 - 423 (1990)
Novel 4'-styryl spiropyran-2,2'-2'H-1'-benzothiopyrans> have been prepared by condensation of 2,4-dimethyl-1-benzothiopyrylium perchlorate (1) with 2-hydroxy-1-naphthaldehyde (3) followed by deprotonation with piperidine which gave the coloured form having an absorption band in the near-IR region on UV irradiation.
