- Red/near-infrared light-emitting organic-inorganic hybrids doped with covalently bound boron dipyrromethene (BODIPY) dyes via microwave-assisted one-pot process
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Red/near-infrared (NIR) light-emitting boron dipyrromethene (BODIPY) dyes bearing methacryloyl groups were synthesized, and these dyes were covalently bonded to poly(2-hydroxyethyl methacrylate) (PHEMA)silica hybrids. The preparation of their hybrids was performed by simultaneous solgel reaction of trimethoxy(methyl)silane and radical copolymerization of 2-hydroxyethyl methacrylate (HEMA) with the dyes under microwave irradiation or conventional heating. Strong red/NIR light-emitting hybrids without discoloration of the dyes were successfully obtained under microwave irradiation, whereas the dyes lost luminescent properties in the hybrids prepared under conventional heating. Photostability test of the hybrids showed that covalent attachment of the dyes led to significant improvement in the photostability in comparison with the solution state. Further, elution amount of the dyes from the hybrids in organic solvents decreased relative to that from physical dye-admixing hybrids due to the covalent bond between PHEMA and the dyes.
- Kajiwara, Yuichi,Nagai, Atsushi,Chujo, Yoshiki
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experimental part
p. 471 - 481
(2011/07/09)
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- 2-(4H-1-Benzopyran-6-yl)propionic acids
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There are described compounds of formula I, STR1 in which Ra is hydrogen, alkyl, alkenyl or phenyl, R3, R5, R7 and R8, which may be the same or different, are each hydrogen, alkyl, alkoxy, halogen, hydroxy, alkenyl or phenyl, Rx is hydrogen or alkyl, Ry and Rz are both hydrogen, or together represent a carbonyl oxygen atom, Rb and Rc are both hydrogen or together represent a carbon-carbon bond, Provided that when Rx is hydrogen, Ry and Rz together represent a carbonyl oxygen atom and R5, R7 and R8 are all hydrogen then Ra is other than methyl or phenyl, And pharmaceutically acceptable derivatives thereof. There are also described methods for making the compounds and pharmaceutical, e.g. anti-inflammatory, compositions containing the compounds.
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- Method of treating inflammation with 2-(2,3-dihydro-2-isopropyl-4-oxo-4H-1-benzopyran-6-yl)propionic acid
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There are described compounds of formula I, STR1 in which Ra is hydrogen, alkyl, alkenyl or phenyl, R3, r5, r7 and R8, which may be the same or different, are each hydrogen, alkyl, alkoxy, halogen, hydroxy, alke
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