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Amine Compounds (amine + compound)

Distribution by Scientific Domains

Chemistry	54%
Polymers and Materials Science	36%

Selected Abstracts

ChemInform Abstract: [2, + 2,] Type Cycloaddition Reactions of Iminotropone Derivatives with Naphtho[b]cyclopropene to Form Cyclic Amine Compounds.

CHEMINFORM, Issue 24 2002
Katsuhiro Saito
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Syntheses and Characterization of Lead(II) N,N -Bis[1(2)H -tetrazol-5-yl]amine Compounds and Effects on Thermal Decomposition of Ammonium Perchlorate

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 23 2009
Weitao Wang
Abstract Three new lead(II) N,N -bis[1(2)H -tetrazol-5-yl]amine (H2bta) compounds, [Pb(bta)(H2O)2]n (1), [Pb2(bta)2(bpy)2] (2), and [Pb2(bta)2(phen)2]·2H2O (3), were synthesized. Single-crystal X-ray diffraction reveals that compound 1 has a 1D polymeric zigzag chain structure, whereas compounds 2 and 3 have binuclear structures. In addition, compounds 1,3 were explored as additives to promote the thermal decomposition of ammonium perchlorate by differential scanning calorimetry. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) [source]

Preparation of bimodal porous copolymer containing ,-cyclodextrin and its inclusion adsorption behavior

JOURNAL OF APPLIED POLYMER SCIENCE, Issue 4 2010
Zhao-Yang Sun
Abstract A novel insoluble bimodal porous polymer containing ,-cyclodextrin (,-CD) was prepared to adsorb aromatic amine compound. The process involved copolymerization of styrene and methyl methacrylate with a maleic acid derivative of ,-CD, subsequently, above formed copolymer was foamed by supercritical CO2. The chemical properties and physical structure of obtained copolymer was analyzed using Fourier transform infrared spectra, Thermal gravimetric analysis, X-ray diffraction, scanning electron microscope, and N2 adsorption techniques. The inclusion adsorption of aromatic amine compounds on ,-CD copolymer was carried out in a batch system. The quantities of aromatic amine compounds adsorbed on ,-CD copolymer reached equilibrium within 60 min. The adsorption kinetic could be fitted to a pseudo-second-order kinetic equation, and the linear correlation coefficients varied from 0.9828 to 0.9935. With the influence of molecular structure and hydrophobicity of the aromatic amine compound, the sequence of quantity of aromatic amine compounds adsorbed on ,-CD copolymer is p -toluidine > aniline > benzidine > o -toluidine. The adsorption equilibrium data of aromatic amine compound adsorbed on ,-CD copolymer were fitted to Freundlich and Langmuir models, respectively. The linear correlation coefficients of Langmuir model varied from 0.9516 to 0.9940, and the linear correlation coefficients of Freundlich varied from 0.9752 to 0.9976. It is concluded that Freundlich model fits better than Langmuir model, because the adsorption of aromatic amine compound on ,-CD copolymer is a chemical process. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 [source]

Crystallization and preliminary X-ray crystallographic studies of omega-transaminase from Vibrio fluvialis JS17

ACTA CRYSTALLOGRAPHICA SECTION F (ELECTRONIC), Issue 8 2010
Tae-ho Jang
Omega-transaminase (,-TA) catalyzes the transfer of an amino group from a non-,-position amino acid or an amine compound with no carboxylic group to an amino acceptor. ,-TA from Vibrio fluvialis JS17 (,-TAVf) is a novel amine:pyruvate transaminase that is capable of stereoselective transamination of aryl chiral amines. In this study, ,-TAVf was overexpressed in Escherichia coli with engineered C-terminal His tags. ,-TAVf was then purified to homogeneity and crystallized at 292,K. X-ray diffraction data were collected to a resolution of 2.5,Å from a crystal belonging to the orthorhombic space group P212121, with unit-cell parameters a = 78.43, b = 95.95, c = 122.89,Å. [source]

Direct chiral analysis of primary amine drugs in human urine by single drop microextraction in-line coupled to CE

ELECTROPHORESIS, Issue 16 2009
Kihwan Choi
Abstract Three-phase single drop microextraction (SDME) was in-line coupled to chiral CE of weakly basic amine compounds including amphetamine. SDME was used for the matrix isolation and sample preconcentration in order to directly analyze urine samples with the minimal pretreatment of adding NaOH. A small drop of an acidic aqueous acceptor phase covered with a thin layer of octanol was formed at the tip of a capillary by simple manipulation of the liquid handling functions of a commercial CE instrument. While the saline matrix of the urine sample was blocked by the octanol layer, the basic analytes in a basic aqueous donor phase were concentrated into the acidic acceptor drop through the octanol layer by the driving force of the pH difference between the two aqueous phases. The enantiomers of the enriched amines were resolved by using (+)-(18-crown-6)-tetracarboxylic acid as a chiral selector for the subsequent CE separation. From 10,min SDME with the agitation of the donor phase by a small stirrer retrofit to the CE instrument, enrichment factors were about a 1000-fold, yielding the LOD of 0.5,ng/mL for amphetamine. This low LOD value as well as the convenience of in-line coupled SDME make the proposed scheme well suited for the demanding chiral analysis of amphetamine-type stimulants. [source]

Dip-Pen Nanolithography Using the Amide-Coupling Reaction with Interchain Carboxylic Anhydride- Terminated Self-Assembled Monolayers,

ADVANCED FUNCTIONAL MATERIALS, Issue 8 2006
S. Chi
Abstract Herein we report on a new type of dip-pen nanolithography (DPN), which utilizes an interfacial organic reaction,the amide-coupling reaction,between chemically activated surfaces and amine ink molecules transferred from an atomic force microscopy tip. As a representative of the chemically activated surfaces that could react with amine compounds, we formed a self-assembled monolayer terminating in interchain carboxylic anhydride (ICA) groups on gold, and generated chemically derived nanopatterns using alkylamines as ink molecules. Amine inks showed diffusive behavior similar to thiol inks on gold in conventional DPN, and the pattern sizes were controlled by changing the tip dwell times. In addition, nanopatterns of hydrolyzed ICAs were generated by taking advantage of the participation of the water meniscus in the DPN process and the chemical nature of the ICAs. [source]

Preparation of bimodal porous copolymer containing ,-cyclodextrin and its inclusion adsorption behavior

Computational study of stereoelectronic effects in fluorinated alkylamines,

JOURNAL OF PHYSICAL ORGANIC CHEMISTRY, Issue 11 2005
Joseph J. Urban
Abstract A systematic evaluation of the stereoelectronic effects in a series of fluorinated amine compounds has been carried out. A variety of computational methods have been employed, including molecular mechanics, semi-empirical, density functional and ab initio methods. An analysis of the natural bond orbital populations has been carried out and the effect of solvent was considered via the polarized continuum model (PCM). The results indicate a preference for conformations that result in an anti-periplanar arrangement between the nitrogen lone pair and the CX bond (XF or CF3). There are variations in geometry and natural bond orbital population, with conformation that are consistent with a stereoelectronic effect whereby electron density from the nitrogen lone pair is delocalized into the CX ,* orbital. Similar results are obtained for trifluoromethyl methylamines, although the magnitude of the stereoelectronic effect is attenuated resulting in greater expected conformational diversity for these compounds. The PCM results suggest that these preferences should persist in solution. Comparison among the computational methods used reveals that there is good agreement among the ab initio and density functional methods (at the HF/6-31,+,G(d), MP2/6-31,+,G(d), MP2/6-311,+,G(2d,p) and B3LYP/6-31,+,G(d) levels) and these methods agree well with the available experimental data for ethylmethylamine. Published in 2005 by John Wiley & Sons, Ltd. [source]

Marfey's reagent: Past, present, and future uses of 1-fluoro-2,4-dinitrophenyl-5-L-alanine amide

JOURNAL OF SEPARATION SCIENCE, JSS, Issue 1-2 2003
Clayton B'Hymer
Abstract This article describes some of the uses of Marfey's reagent, 1-fluoro-2,4-dinitrophenyl-5-L-alanine amide (FDAA), a pre-column derivatizing reagent for the separation of enantiomeric isomers of amino acids and amine compounds. An introduction to the basic implementation of this reagent and its historical development are presented. Actual uses in amino acid, short peptide, and pharmaceutical compounds are included, as well as the advantages and disadvantages over other pre-column derivatization techniques and direct chromatographic separations. Applications of current interest, including its use as an orthogonal analysis and in enantiomeric purity analysis of selenoamino acids using element specific detection, are also discussed. [source]

Dual Tuning of Emission Color and Electron Injection Properties Through in-situ Chemical Reaction in a Conjugated Polymer Containing 9,10-Phenanthrenequinone

MACROMOLECULAR CHEMISTRY AND PHYSICS, Issue 23 2009
Zhiming Wang
Abstract Three new polymers were obtained through an in situ chemical reaction of the matrix conjugated polymer (PPQF) with ortho- amine compounds. By controlling the conjugation degree of diamine compounds, the emission of PPQF was tuned from weak blue to bright blue, green, and orange for PFBQ, PFBP and PFNP, respectively. The photoluminescence efficiencies were also improved in the same tendency, and the LUMO levels were gradually decreased from ,2.76 and ,3.12 to ,3.40,eV, which was beneficial for electron injection and transport in electronic devices. Thus, a dual tuning for the emission color and electron injection properties were realized through an in situ chemical reaction, which is a novel strategy to design and construct new valuable polymers from one reactive matrix polymer. [source]

Effects of Polymer Architecture and Composition on the Adhesion of Poly(tetrafluoroethylene)

CHEMPHYSCHEM, Issue 6 2006
Chen-Yuan Tu Dr.
Abstract Poly(glycidyl methacrylate), PGMA, chains in linear and arborescent structures were incorporated onto surfaces of poly(tetrafluoroethylene), PTFE, films by hydrogen plasma and ozone treatment and atom transfer radical polymerization. The epoxide groups of the PGMA chains were further reacted with acetic acid (AAc), oxalic acid (XAc), allyl amine (AA), and ethylenediamine (EDN) to introduce hydroxyl and amine groups to the surfaces of the PTFE films. Surface characterizations performed by Fourier Transform infrared attenuated total reflectance (FTIR-ATR) spectroscopy and X-ray photoelectron spectroscopy (XPS) confirmed the surface modification and the chemical structure. The PGMA chains in arborescent structures show a high effectiveness for the enhancement of the adhesion of PTFE films. The adhesion of PTFE films was also significantly enhanced by ring-opening reactions of the PGMA epoxide groups with acetic acid and amine compounds. A high value of 9.5 N,cm,1 in the optimum 180° peel strength test was observed with PTFE/copper assemblies. [source]