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Synthesis and photochromism of novel phenylene-linked photochromic bispyrans.
Journal article

Synthesis and photochromism of novel phenylene-linked photochromic bispyrans.

  • Zhao W Laboratorium für Organische Chemie, ETH-Hönggerberg HCI H335, Zürich, Switzerland.
  • Carreira EM
  • 2005-12-31
Published in:
  • Organic letters. - 2006
English [reaction: see text] Phenylene-linked bisnaphthopyrans were synthesized in good yields via the one-pot reaction of bis-propargyl alcohols with naphthols. Temperature-dependent photochromism in 1,4-phenylene-linked bispyrans leads to up to 60 nm bathochromic shift between the colored species formed at room temperature and at -20 degrees C. Better fatigue resistance and higher colorability was observed in 1,4-phenylene-linked bis-[2H]-naphtho[1,2-b]pyrans by comparison to the 1,3-phenylene linked bis-[2H]-naphtho[1,2-b]pyrans.
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  • English
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closed
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https://sonar.ch/global/documents/152037
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