32060-20-1Relevant academic research and scientific papers
To estimation of pKa for spiropyrans of the indoline series
Chernyshev,Chernov'yants,Voloshina,Voloshin
, p. 1468 - 1472 (2002)
A mathematically substantiated approach to estimating acid-base characteristics of spiropyrans of the indoline series with account for the ring-chain tautomerism of these compounds was proposed. The pKa values of spiropyrans of various basicity were estimated.
SYNTHESIS AND PHOTOCHROMIC PROPERTIES OF INDOLINOSPIROCHROMENES WITH BENZYL, ETHYL, AND ACETONYL GROUPS ATTACHED TO THE NITROGEN ATOM
Lazarenko, I. B.,Przhiyalgovskaya, N. M.,Gal'bershtam, M. A.,Bobyleva, G. K.,Suvorov, N. N.
, p. 1054 - 1057 (2007/10/02)
A number of photochromic indoline spirochromenes with benzyl, acetonyl, and etyl substituents attached to the nitrogen atom in the indoline part of the molecule were synthesized.The introduction of a benzyl group at the nitrogen atom in place of the methyl group does not change the rate constants of the dark decolorization of the photomerocyanines, whereas an acetonyl group increases them, and an ethyl group decrease them.The introduction of the indicated substituents in the 1 position gives rise to a bathochromic shift (up to 18 nm) of the long-wave absorption band of the merocyanine form of the spirochromene.
Photo-polymerizable composition containing an acid salt of an indolinobenzospiropyran
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, (2008/06/13)
A photo-polymerizable composition comprising (A) a photopolymerization initiator comprising at least one inorganic or organic acid salt of an indolinobenzospiropyran represented by the following general formula (I): SPC1 wherein R1 represents an alkyl group, substituted alkyl group or a phenyl group; R2 and R3 each represents an alkyl group or a phenyl group or, when taken together, R2 and R3 form a methylene chain CH2 wherein n is an integer of 4 or 5; X represents a hydrogen atom, a nitro group, a halogen atom, a carboxy group; and Y represents one or more substituents selected from the group consisting of a hydrogen atom, a nitro group, a halogen atom, a formyl group and an alkoxy group, and (B) at least one cationically polymerizable substance.
