23624-49-9Relevant academic research and scientific papers
ANTI-BLUE LIGHT COMPOUND, PREPARATION METHOD AND APPLICATION THEREOF
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Paragraph 0105-0106; 0108-0109, (2021/07/30)
Disclosed is a blue light absorbing compound, its preparation method and use. The compound has high stability and is suitable for high temperature processing conditions as well as outdoor application. A method of covalently bonding a blue light absorbing compound with an ultraviolet light absorbing compound for increasing its stability is also provided. The compound is capable of absorbing or blocking ultraviolet light (UVA, UVB) and blue light to protect eyes. But long-wavelength blue light can be absorbed diminishingly, so that the transmitted light has a particularly good visual experience.
Novel polycyclic compound
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Paragraph 0165; 0169-0170; 0172-0175, (2020/07/06)
The invention provides a novel polycyclic compound as well as a synthesis method and application thereof. The compound of the present invention includes a plurality of carbocyclic and/or heterocyclicstructures having visible or fluorescent light emitting groups and covalently bonded to at least one ultraviolet and/or visible (blue) light absorbing group to provide stability. The compound providedby the invention can be used as a light conversion agent, a dye, a pigment, a fluorescent agent and an ultraviolet light or blue light absorbent, and can be applied to optical films, agricultural films, optical discs (disks), optical lenses, goggles, skin care, cosmetics, illumination, coatings, adhesives, light stabilizers, panels and other products.
Preparation of Some 2-(Methoxyphenyl)-2H-benzotriazoles and the Corresponding Hydroxyphenyl Compounds
Rosevear, Judi,Wilshire, John F. K.
, p. 1663 - 1673 (2007/10/02)
The reaction of several substituted o-nitronitrosobenzenes with o- and p-anisidine, and 2,4-dimethoxyaniline in acetic acid gives in good yield the corresponding o-nitroazobenzenes which are readily reduced with thiourea dioxide (formamidinesulfinic acid) to the corresponding 2-(methoxyphenyl)-2H-benzotriazoles, demethylation of which furnished the corresponding 2-(hydroxyphenyl)-2H-benzotriazoles.Demethylation of the dimethoxy derivatives was best accomplished with boron tribromide in methylene chloride, the methoxy group located ortho to the benzotriazole ring beingdemethylated more readily than is the para-methoxy group.The reaction of 0-nitroazobenzenes containing a methoxy group with hydrobromic acid in acetic acid results in cleavage of the azo bond and also partial bromination to give o-nitroaniline and some of its brominated derivatives.
Preparation of Some 2-(2' H-Benzotriazol-2'-yl)phenol Ultraviolet Absorbers: Application of the Transalkylation Reaction
Rosevear, Judi,Wilshire, John F.K.
, p. 1163 - 1176 (2007/10/02)
When 2-(2' H-benzotriazol-2'-yl)phenols containing t-alkyl substituents are warmed in toluene solution with an aluminium chloride/nitromethane catalyst, the t-alkyl groups are transferred to the solvent (toluene).This transalkylation reaction has been used to prepare not readily accessible or previously inaccessible 2-(2' H-benzotriazol-2'-yl)phenols, a class of ultraviolet absorbers widely used in industry.
