Phenanthrene-based compound having high refractive index and preparation method therefor
AssigneeResearch & Business Foundation Sungkyunkwan University
InventorsYounchul KIM, Jinho KIM, Subeen KIM
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Abstract
Disclosed herein are a phenanthrene-based compound with a high-refractive index and a preparation method therefor. The compound has a phenanthrene-based complex cardo structure and can be used as a monomer in optical resins requiring a refractive index of 1.7 or higher. Due to the phenanthrene-based complex cardo structure of the compound, the fluidity of the molecular chains can be maximally suppressed, allowing for the production of resins with excellent thermal stability, characterized by a high glass transition temperature.
Claims11
A phenanthrene-based compound having the chemical structure represented by the following Chemical Formula 1:
- wherein R1a, R1b, R2a, and R2b are each a substituent bonded to the phenanthrene or phenyl moieties,
- R3a and Rb are each an alkylene;
- k1 and k2 are each independently an integer of 0 to 4;
- m1 and m2 are each independently an integer of 0 to 3;
- n1 and n2 are each independently an integer of 0 or 1 or higher;
- p1 and p2 are each independently an integer of 1 or higher,
- with a proviso that m1+p1 and m2+p2 are each independently an integer of 1 to 4.
A method for preparing a phenanthrene-based compound, the method comprising the steps of:
- (a) oxidizing pyrene to synthesize pyrene-4,5-dione;
- (b) synthesizing cyclopentaphenanthrene-4-one from pyrene-4,5-dione;
- and
- (c) synthesizing 2,2′-(((4H-cyclopentaphenanthrene-4,4-diyl) bis (4,1-phenylene)) bis (oxy)) diethanol from cyclopentaphenanthrene-4-one.
Dependencies are inferred from the claim text.