Novel substituted - 6, 8-dinitro - 1', 3', 3' - trimethylspiro [2H - 1 - benzopyran - 2, 2' - indoline] derivatives have been synthesized in high yields, and their properties are investigated. The at,sorption max;ima of the ring-open forms and the negative photochromic properties of spirobenzopyrans significantly depend on the substituents in the indoline ring and on the nature of the solvent used.
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Ctr Frontier Sci & Technol NAIST CEMES, Int Collaborat Lab, F-31055 Toulouse, France
NAIST, Nara Inst Sci & Technol, Grad Sch Mat Sci, Nara 6300192, JapanCtr Frontier Sci & Technol NAIST CEMES, Int Collaborat Lab, F-31055 Toulouse, France
Galangau, Olivier
Nakashima, Takuyama
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Ctr Frontier Sci & Technol NAIST CEMES, Int Collaborat Lab, F-31055 Toulouse, FranceCtr Frontier Sci & Technol NAIST CEMES, Int Collaborat Lab, F-31055 Toulouse, France
Nakashima, Takuyama
Maurel, Francois
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Univ Paris 07, Lab Interfaces Traitements Org & Dynam Syst ITODY, CNRS UMR 7086, Sorbonne Paris Cite, F-75205 Paris 13, FranceCtr Frontier Sci & Technol NAIST CEMES, Int Collaborat Lab, F-31055 Toulouse, France