2,6-Difluorodopamine and 3-(2,6-difluoro-3,4-dihydroxyphenyl)alanine were prepared by side-chain elaboration of 2,6-difluoroveratraldehyde, followed by removal of protecting groups.
Ethyl acetate extracts of olive mill waste water (OMWW) were prepared, under in optimal conditions, using a continuous counter-current extraction unit. The antiradical and antioxidant activities of the OMWW extract as well as pure phenolic compounds identified in this extract were evaluated. Res...
8′-Iodo-8-[1-(1′-phenylthio)ferrocenyl]-1,1′-binaphthyl, a precursor of chiral phosphines, and 8′-(4-methylphenyl)-8-[1-(1′-phenylthio)ferrocenyl]-1,1′-binaphthyl, a model compound for the preparation of charge-transfer complexes were synthesized via Suzuki coupling reactions of ferrocenyl...
High efficiency in the two-photon intramolecular CC bond formation to the two-photon product acenaphthene (4), obtained in a maximum yield of 72%, was achieved by direct activation of two separate leaving groups of 1,8-bis(phenoxymethyl)- (1a), 1,8-bis(phenylthiomethyl)- (1b), and 1,8-bis(phen...
A new substituted phthalonitrile derivative, 4-(4-(methylthio)phenylthio) phthalonitrile was prepared by nucleophilic displacement reaction between 4-(methylthio)phenylthio and 4-nitrophthalonitrile. Tetra phthalocyanines [M: 2H(2), Zn(II)(3), Co(II)(4)] with four peripheral 4-(methylthio)phenyl...
The parallel and perpendicular stacking of ferrocene rings in 1,8-bis-[1-(1′-phenylthio)ferrocenyl]naphthalene (1) and 8,8′-bis-[1-(1′-phenylthio)ferrocenyl]-1,1′-binaphthyl (2), respectively, were investigated. They were synthesized from the Suzuki coupling of 2,4,6-tris(1′-phenylthio-1-fe...
An investigation has been made of forty-two 4,4′-isopropylidenebisphenols, substituted with alkyls, phenyls or halogens, for the stabilization of isotactic polypropylene at 180°; the basic effects of substituents on antioxidant activity have been determined. Substituents with −I-effect decreas...
Amine functionalization of graphene/graphene-like MoSe2 (NH2-rGO/MoSe2) hybrid nanosheets were synthesized by a facile hydrothermal method. Then, as lubricant additives, the hybrids were doped into bismaleimide (BMI) matrix to reinforce the mechanical and tribological properties of BMI composite...
A novel approach to fabricate sulfur rich thermosets as materials for LiS batteries is described. For this purpose, polybismaleimide copolymers were synthesized by reacting bismaleimide (BMI) monomer and elemental sulfur at 180 °C. Parameters such as monomers and feed ratios on the polymerizati...
Mechanisms and kinetics of non-isothermal polymerization of N,N′-bismaleimide-4,4′-diphenylmethane (BMI) with barbituric acid (BTA) in dimethyl sulfoxide (DMSO) were investigated. The polymerization of BMI with BTA in DMSO was characterized by using differential scanning calorimeter (DSC), ele...
In this work, we report matrix and interfacial healing capabilities for hybrid DA-based polymer nanocomposites. Thermo-reversible self-healing nanocomposites were prepared by reinforcing bismaleimide grafted graphite nanoplatelets (B-GNPs) in a DA-based hybrid polymer matrix (HPM). The maleimide...
The hybrid carbon/glass fibers reinforced polymer matrix composites (CF/GF-PMCs) used as structural materials of weapon systems often suffer high-temperature condition, leading performance degradation of them. The electromagnetic (EM) absorbing properties are essential for the survival of the we...
Rod-like sepiolite organoclays are incorporated into a simple, first-generation commercial bismaleimide (BMI) to improve the inherent brittleness of the cured polymer; montmorillonite clay is used as a baseline comparison. Both solution and solid state blending methods are evaluated to determine...
In view of self-healing materials for high temperature applications we have studied the use of solid monomeric bismaleimide particles as embedded self-healing component dispersed in a host material. Below the self-healing activation temperature, bismaleimides remain inert while above it they may...
This chapter discusses bismaleimide (BMI) resin systems and their components. They are noted for their high-strength, high-temperature performance, particularly as matrix resins in fiber-reinforced prepregs and composites. They are bridging the gap between the relatively low-temperature-resistan...
This chapter summarizes new research in the development of bismaleimide-modified benzoxazine alloys. The curing behavior, catalytic effect between benzoxazine and bismaleimide, and the influence of additional functional groups attached in benzoxazine monomers, such as allyl, furan group, nitrile...
Bismaleimide (BMI), as a high-performance thermosetting resin, has been widely used to many cutting-edge fields, but the ability of difficult to dissolve and complicated post-treatment process has hindered the applications of BMI in Additive manufacturing technology. In this study, additive manu...
A series of novel ethyl 5-(4-aminophenyl)-1H-pyrazole-3-carboxylate derivatives were designed and synthesized and their in vitro acrosin inhibitory activities were evaluated. Most of the compounds exhibited acrosin inhibitory activities. Among them, three compounds (5l, 5n, and 5v) were more pot...
(E)-1-(2-aminophenyl)-3-(pyridine-4-yl)prop-2-en-1-one (or simply 2-aminochalcone) was synthetized and characterized by elemental analysis, FT-IR, NMR, MS and XRD. Molecular geometry optimization, vibrational harmonic frequencies, 1H and 13C NMR chemical shifts were calculated by ab initio (HF a...
A new method for the synthesis of hitherto unreported 9-membered macrolactones by reaction of 3-[(2-aminophenyl)amino]-5,5-dimethyl-2-cyclohexen-1-one with o-quinones in the presence of acidic catalysts is presented.
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