Abstract:
A method of phosphate ester hydrolysis including incubating a solution of an aqueous phosphate ester with a texaphyrin metal complex. The metal is a metal cation having catalytic activity for ester bond hydrolysis in aqueous solution, in particular, a lanthanide metal cation, preferably Eu(III) or Dy(III). A preferred substrate is RNA and a preferred texaphyrin is a derivatized texaphyrin having binding specificity, in particular, a texaphyrin covalently coupled to a site-directed molecule, preferably an oligonucleotide.
Abstract:
The disclosure provides for metal organic frameworks (MOFs) which comprise a plurality of SBUs comprising different metals or metal ions and/or a plurality of organic linking moieties comprising different functional groups.
Abstract:
The present invention relates to the field of polymerisation catalysts, and systems comprising these catalysts for polymerising carbon dioxide and an epoxide, a lactide and/or lactone, and/or an epoxide and an anhydride. The catalyst is of formula (I): (Formula (I)) wherein at least one of M 1 or M 2 is selected from Ni(II) and Ni(lll)-X. A process for the reaction of carbon dioxide with an epoxide; an epoxide and an anhydride; and/or a lactide and/or a lactone in the presence of the catalyst is also described.
Abstract:
The present invention mainly pertains to a catalytic process for preparing a formamide,comprising reacting a formic acid ester with an aromatic amine carrying at least one electron withdrawing group in the presence of a catalyst of fluorine-containing sulfonimide metal salt.
Abstract:
The invention relates to a block copolymer comprising a first block of general structure formula (II) and a second block of general structure formula (III) wherein Rx is an organic group having a chain length of from 1 - 9 atoms; R y is an organic group having a chain length of from 10 - 38 atoms; n 1 is at least 2; n 2 is at least 2. The invention further relates to a method for preparing such block copolymer using as a catalyst a phenoxy-imine based catalyst having general structure of formula I.
Abstract:
Die vorliegende Erfindung betrifft einen Katalysator für die Vernetzung von Siliconkautschukmassen mit einem Vernetzer auf Lactatbasis. Insbesondere stellt die vorliegende Erfindung eine Zusammensetzung zur Herstellung einer Siliconkautschukmasse mit einem Vernetzer auf Lactatbasis bereit, wobei die Zusammensetzung einen Katalysator umfasst, der mindestens zwei voneinander verschiedene Verbindungen umfasst, die unabhängig voneinander aus Metallsalzen von Carbonsäuren ausgewählt werden. Darüber hinaus stellt die vorliegende Erfindung ein Verfahren zur Herstellung einer solchen Zusammensetzung bereit, sowie eine Verwendung des Katalysators zum Vernetzen einer Siliconkautschukmasse, insbesondere zum Vernetzen einer Siliconkautschukmasse mit einem Vernetzer auf Lactatbasis, sowie eine Verwendung der erfindungsgemäßen Zusammensetzung zur Herstellung einer Siliconkautschukmasse, insbesondere zur Verwendung als Dichtungsmittel, Klebstoff oder Beschichtungsmittel.
Abstract:
The present invention relates to a stabilized drying catalyst ('drier') for enhancing or accelerating oxidative air-drying of an alkyd-based composition, comprising an inclusion complex of a cyclodextrin and a metal salt of formula (M x+ )k(R k- ) χ , wherein M is a transition or rare earth metal cation with charge x and R is an anion with charge k. The present invention preserves the catalytic activity of a drier, particularly upon addition to an alkyd composition, thus providing a method for stabilizing the drying time of the alkyd composition. A process for preparing the stabilized drier is also provided.
Abstract:
A process for preparing an alkoxylation catalyst wherein a catalyst precursor which is formed from an alkoxylated alcohol and an alkaline earth metal compound to form a dispersion of an alkaline earth metal species is reacted with propylene oxide to propoxylate at least a portion of the ethoxylated alcohol.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines porösen metallorganischen Gerüstmaterials durch Umsetzung mindestens einer Metallverbindung, wobei das Metall Be, Mg, Ca, Sr, Ba, AI, Ga oder In ist, mit mindestens einer mindestens zweizähnigen organischen Verbindung sowie die Verwendung solcher porösen metallorganischen Gerüstmaterialien.
Abstract:
A process for preparing an alkoxylation catalyst suitable for alkoxylating compounds that includes mixing a calcium-containing compound in a dispersing medium having a boiling point less that 160 °C with a carboxylic acid and an inorganic acid or anhydride.