1173922-30-9Relevant articles and documents
Organic fluorescent sensing material capable of selectively detecting nerve agent, and preparation method and application thereof
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Paragraph 0168; 0171, (2018/01/09)
The invention belongs to the field of organic semiconductor nanomaterials, and concretely relates to an organic fluorescent sensing material capable of selectively detecting a nerve agent, and a preparation method and application thereof. The invention prepares the organic fluorescent sensing material capable of selectively detecting the nerve agent. A series of P type organic fluorescent sensing materials based on carbazole molecules synthesize to form a structure of a carbazole derivative with different side chains through changing side chains of the carbazole molecules and a polymerization degree thereof, and a one-dimensional organic semiconductor nanowire is obtained through a self-assembly method, namely the organic fluorescent sensing material capable of selectively detecting the nerve agent. The nanowire provided by the invention has the characteristics of large specific surface area, more surface porosity and the like, the nerve agent to be detected is favorably adsorbed and diffused on the surface of the nanowire, and a detection limit is greatly reduced. Therefore, the organic fluorescent sensing material provided by the invention can be used as a fluorescence sensor with an excellent performance capable of recognizing the nerve agent.
Application of a promiscuous Arthrobacter sp. from Antarctic in aerobic (R)-selective deracemization and anaerobic (S)-selective reduction
Palmeira, Dayvson J.,Arajo, Lidiane S.,Abreu, Juliana C.,Andrade, Leandro H.
, p. 117 - 125 (2015/02/19)
Inspired by enzyme-catalyzed reactions with microorganisms found in harsh marine environments, in which the amount of oxygen is restrict, we have shown that Arthrobacter sp. can perform different chemical transformations by switching from anaerobic to aerobic reaction conditions. Depending on the presence or absence of oxygen, either alcohol deracemization or ketone reduction with enantiocomplementary selectivities can be performed by the same microorganism. For example, reactions performed in the presence of oxygen favored the deracemization process, in which a racemic mixture of 1-(4-methylphenyl)ethanol was enriched to the (R)-alcohol in high conversion (94%) and high enantiomeric excess (94%). On the other hand, reaction in the absence of oxygen favored the reduction process, in which 4-methyl-acetophenone was converted to the (S)-alcohol in good conversion (58%) and excellent enantiomeric excess (>99%). These concepts were applied for both deracemization and enantioselective reduction of heteroatom-containing (silicon, phosphorus, tin and boron) molecules. Moreover, preparative scale reactions were also performed for both chemical processes.
Lipase-catalyzed highly enantioselective kinetic resolution of boron-containing chiral alcohols
Andrade, Leandro H.,Barcellos, Thiago
supporting information; experimental part, p. 3052 - 3055 (2009/12/05)
The first application of enzymes as catalysts to obtain optically pure boron compounds is described. The kinetic resolution of boron-containing chiral alcohols via enantioselective transesterification catalyzed by lipases was studied. Aromatic, allylic, and aliphatic secondary alcohols containing a boronate ester or boronic acid group were resolved by lipase from Candida antartica (CALB), and excellent E values (E > 200) and high enantiomeric excesses (up to >99%) of both remaining substrates and acetylated product were obtained.