The solubility of phthalic anhydride was measured at 283–313 K under atmospheric pressure in ethyl acetate, n -propyl acetate, methyl acetate, acetone, 1,4-dioxane, n -hexane, n -butyl acetate, cyclohexane, and dichloromethane. The solubility of phthalic anhydride in all solvents increased with...
In recent years, the number of insoluble drug candidates has increased, with almost 70% of new drug candidates showing poor solubility. Cosolvent was used in this work to improve the solubility of poorly soluble temozolomide. The solubility data of temozolomide in four mixed solvents including (eth...
(TAPOB), was synthesized from phloroglucinol and 4-chloronitrobenzene, and it was successfully polymerized into soluble hyperbranched polyimides (HB PIs) with commercially available dianhydrides: 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), 4,4′-oxydiphthalic anhydride (ODPA), and 3,...
A series of polyimides (PIs) with low dielectric constant were synthesized via a polycondensation from two new unsymmetric phthalic-thioether-naphthalic dianhydride isomers which were synthesized from 3- or 4-chlorophthalic anhydride by a four-step procedure. The introduction of the unsymmetric phthalic...
1-Fluoro-4-nitrobenzene (98%), 4-chloro-1-nitro-3-(trifluoromethyl)benzene (99%), 4,4′-oxydiphthalic anhydride (ODPA, 97%), (4,4′-hexafluoroisopropylidene)-diphthalic anhydride (6FDA, 98%), palladium on activated charcoal (Pd/C catalyst, 5%), 1-methyl-2-pyrrolidinone (NMP), p-...
(DPDAPP) was successfully synthesised and polymerised with 4,4-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and diamine 2,2-bis[4-(4-aminophenoxy)phenyl]propane (BAPP) via the conventional two-step chemical imidisation method to produce a series of various alkyl-chain content polyimides...
new diamine (TPCPPDA) bearing tetraphenylcyclopentadienone (TPCP) chromophore with 4,4 '-(hexafluoroisopropylidene) diphthalic anhydride (6FDA). The resulted TPCPPPI showed a cutoff wavelength (lambda cut) of 627 nm and Commission International de l'Eclairag LAB (CIE-LAB) parameter L* of 5.73...
The present invention relates to a method for preparing a water-soluble metal phthalocyanine derivatives, including: (1) the use of phthalic anhydride - solid-phase synthesis of urea synthesis eight carboxy-metal phthalocyanine; (2) the carboxyl group of the eight metal phthalocyanine and ...
said copolyester resins being the polymeric reaction products of a mixture of reactants consisting of ethylene glycol, terephthalic acid or a lower C 1 -C 4 dialkyl ester thereof, phthalic acid or phthalic anhydride, and an aliphatic dicarboxylic acid or lower C 1 -C 4 dialkyl ester thereof ...
These ICs were reacted with 4,4'-hexafluoroisopropylidenediphthalic anhydride (6FDA) in N,N-dimethylacetamide (DMAc) to form a polyamic acid intermedaite, which imidized thermally to novel pseudopolyimiderotaxanes (M_w: 8400-31 100, concents of #beta#-CDs: 4.3-11.2%). Polymers were ...