The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.
[EN] PYRIDINIUM, QUINOLINIUM, ACRIDINIUM, PYRYLIUM, CHROMENYLIUM OR XANTHYLIZUM REACTIVE DESORPTION AND/OR LASER ABLATION IONIZATION MATRICES AND USE THEREOF<br/>[FR] MATRICES D'IONISATION RÉACTIVES AVEC DÉSORPTION ET/OU ABLATION LASER ET LEUR UTILISATION
申请人:ANDREN PER
公开号:WO2019172830A1
公开(公告)日:2019-09-12
The present disclosure concerns use of compounds of formula I, or salts thereof, as reactive matrices for desorption and laser ablation ionization spectrometry. The disclosure further concerns compounds of formula II, or salts thereof, and use of compounds of formula II or III, or salts thereof.
In one aspect, the present invention provides catalysts for the carbonylation of heterocycles. The inventive catalysts feature metal-ligand complexes having cationic functional groups tethered to the ligand, wherein the tethered cationic groups are associated with anionic metal carbonyl species. The invention also provides methods of using the inventive catalysts to affect the ring opening carbonylation of epoxides.
SALEN COMPLEXES WITH DIANIONIC COUNTERIONS
申请人:Novomer, Inc
公开号:US20140336354A1
公开(公告)日:2014-11-13
The present invention describes metal salen complexes having dianionic counterions. Such complexes can be readily precipitated and provide an economical method for the purification and isolation of the complexes, and are useful to prepare novel polymer compositions.
PRODUCTION SYSTEM/PRODUCTION PROCESS FOR ACRYLIC ACID AND PRECURSORS THEREOF
申请人:Sookraj Sadesh H.
公开号:US20170029352A1
公开(公告)日:2017-02-02
Provided herein are systems, and methods of using such systems, for producing acrylic acid from ethylene oxide and carbon monoxide on an industrial scale. The production system/production process has various unit operations, including, for example, a β-propiolactone production system/production process configured to produce β-propiolactone from ethylene oxide and carbon monoxide; a polypropiolactone production system/production process configured to produce polypropiolactone from β-propiolactone; and a glacial acrylic acid production system/production process configured to produce acrylic acid with a high purity by thermolysis of polypropiolactone.