1021906-40-0Relevant academic research and scientific papers
DICHROIC-PHOTOCHROMIC COMPOUNDS AND DEVICES
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Page/Page column 18, (2008/12/05)
A naphthopyran compound represented by the formula (I) B1 and B2 may include a phenyl, naphthyl, or heterocyclic aromatic group, or may combine to form one or more aromatic rings. B1 and B2 may further include one or more substituents. Ra may include an alkyl, polycycloalkyl, alkenyl, polyalkenyl, haloalkyl, perhaloalkyl, alkynyl, polyalkynyl, hydroxyalkynyl, polyhydroxyalkynyl; or (C3-20)cycloalkyl group. Rb and Rc may include hydrogen or alkyl groups, or may combine to form a saturated heterocyclic group, or rogether with an adjacent phenyl group may form a julolidinyl group. R3, R4, R5, R6, and R10 may include hydrogen, halogen, -Ra, -OH, -ORa, -O-CO-Ra, -CN, -NO2, -SO2Ra, -SORa, -SH, -SRa, -NH2, -NHRa, -NRaRa, or -NRbRc; or any two or more may combine to form a cyclic group. R7 is a mesogenic group. And the naphthopyran, which may be referred to as a dichroic-photochromic compound, may be incorporated into an optical article.
