3204-61-3Relevant articles and documents
Stereoisomerically controlled inorganic architectures: Synthesis of enantio- and diastereo-merically pure ruthenium-palladium molecular rods from enantiopure building blocks
Waernmark, Kenneth,Thomas, Jim A.,Heyke, Olga,Lehn, Jean-Marie
, p. 701 - 702 (1996)
The construction of nanometre scale RuIIPdIIRuII π-conjugated molecular rods, Λ,Λ-1 and Δ,Δ-1, from enantiomerically pure building blocks, provides a method for obtaining enantio- and diastereo-merically pure RuII-based molecular architectures.
Dicationic benzimidazole corrosion inhibitor and preparation method thereof
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Paragraph 0029-0033, (2021/06/02)
The invention discloses a dicationic benzimidazole corrosion inhibitor and a preparation method thereof. The preparation method comprises the following steps of: (1) carrying out acylation and cyclization reactions on 1, 2, 4, 5-tetraaminobenzene and thiophane-2-carboxylic acid-1, 1-dioxide to obtain a benzimidazole derivative; and (2) reacting the benzimidazole derivative with halogenated alkane to obtain the dicationic benzimidazole corrosion inhibitor. The corrosion inhibitor has a dicationic structure, so that the corrosion inhibitor has good solubility and strong adhesive force on a metal surface. In addition, the corrosion inhibitor has a plurality of alkane straight chains, and the hydrophobic end can directionally enter a corrosive medium, so that a hydrophobic layer is formed to repel the corrosive medium, and the corrosion inhibitor can be used as a corrosion inhibitor for carbon steel and copper and has a good corrosion inhibition effect.
Quinolyl benzimidazole corrosion inhibitor and preparation method thereof
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Paragraph 0032; 0036, (2021/05/29)
The invention discloses a quinolyl benzimidazole corrosion inhibitor and a preparation method thereof.The preparation method comprises the steps that 1) carrying out cylation and cyclization reaction on 1,2,4,5-tetraaminobenzene and quinoline-4-carboxylic acid to obtain quinolyl benzimidazole; 2) carrying out chain extension on the quinolyl benzimidazole and tetramethylene diamine, and then carrying out quaternization reaction to obtain the quinolyl benzimidazole corrosion inhibitor. The corrosion inhibitor has high cation density and good solubility, nitrogen atoms and aromatic rings form conjugated pi bonds, and the adhesion force on the metal surface is high. In addition, the corrosion inhibitor has a plurality of alkane straight chains, and the hydrophobic end can directionally enter a corrosive medium, so that a hydrophobic layer is formed to repel the corrosive medium, and the corrosion inhibitor can be used as a corrosion inhibitor for carbon steel and copper and has a good corrosion inhibition effect.
Conjugated benzimidazole corrosion inhibitor and preparation method thereof
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Paragraph 0034; 0038, (2021/04/21)
The invention discloses a conjugated benzimidazole corrosion inhibitor and a preparation method thereof, the preparation method is as follows: 1) 1, 2, 4, 5-tetraminobenzene, o-phenylenediamine and 3, 5-pyridine dicarboxylic acid are subjected to acylation and cyclization reactions to obtain pyridine- benzimidazole; 2) reacting pyridine- benzimidazole with methyl iodide under an alkaline condition to replace the 1H position of benzimidazole; and 3) carrying out quaternization reaction to obtain the conjugated benzimidazole corrosion inhibitor. The conjugated benzimidazole corrosion inhibitor provided by the invention is high in conjugation degree of molecules, can form a large pi bond to be adsorbed on a metal surface in a planar configuration, is strong in adhesive force, greatly improves the corrosion inhibition rate, can be used as a copper and iron corrosion inhibitor, and has a good corrosion inhibition effect.
Synthesizing method and application of 1,2,4,5-tetraamine benzene
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Paragraph 0030; 0033, (2018/07/30)
The invention discloses a synthesizing method and application of 1,2,4,5-tetraamine benzene. The synthesizing method comprises the following steps: preparing a chlorobenzene byproduct which is 1,2,3-trichlorobenzene as a raw material; nitrifying to obtain 4,6-binitro-1,2,3-trichlorobenzene; further performing ammonolysis in an organic solvent A to obtain 4,6-binitro-2-chlorine-1,3-phenylenediamine; dissolving an ammonolysis product into an organic solvent B; performing catalytic hydrogenolysis to obtain 1,2,4,5-tetraamine benzene. Compared with the prior art, the method has the advantages thatthe chlorobenzene byproduct which is 1,2,3-trichlorobenzene is utilized, and moreover, nitroreduction and halogen hydrogenolysis are integrated during the hydrogenolysis process, thereby facilitatingindustrial production, and providing raw material support to development of downstream products. The application is that 1,2,4,5-tetraamine benzene is used as the raw material and polymerized with 2,5-dihydroxy terephthalic acid to obtain PDBI resin which is an engineering fiber material being high in spinnability and high in modulus.
Organo-metal compositions, preparation and use
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, (2008/06/13)
Complexes of a transition metal and a tetrasubstituted aromatic compound which contain at least two transition metal atoms. At least two of the substituents are -SH groups, the other two substituents being -SH, -OH and -NHR. The complexes are prepared by reacting the tetrasubstituted aromatic compound with a transition metal compound in the presence of a disubstituted aromatic compound. Depending on the relative proportions of the di- and tetra--substituted compounds, the resulting complex may contain more than one residue from the tetra-substituted compound and more than two transition metal atoms. The complexes possess infra-red absorbing properties which vary in dependence on the particular complex, the complexes with more than one residue from the tetrasubstituted compound absorbing radiation of longer wavelength. The compounds can be used to provide infra-red absorbing compositions, for example as a coating or inter-layer for glass. The complexes may be used together with one or more different infra-red absorbing materials. The tetra-substituted aromatic compound may be a tetra-thiol and this can be prepared from an aromatic compound containing at least four halogen substituents by reaction with an alkaline thiol compound in the presence of iron and sulphur in a polar solvent such as dimethyl formamide.
