摘要:
A catalyst including: neodymium; sodium; and a ligand, which is a compound expressed by Structural Formula (1) below, wherein the neodymium and the ligand form a complex at a molar ratio of 1:2 (neodymium:ligand):
摘要:
The invention describes phospho-amino pincer-type ligands, metal complexes thereof, and catalytic methods comprising such metal complexes for conversion of carbon dioxide to methanol, conversion of aldehydes into alcohols, conversion of aldehydes in the presence of a trifluoromethylation agent into trifluorinated secondary alcohols, cycloaddition of carbon dioxide to an epoxide to provide cyclic carbonates or preparation of an amide from the combination of an alcohol and an amine.
摘要:
In some embodiments, the present disclosure pertains to a compound, comprising a transition metal complex having the formula Φ-[M(x,y)-L1(w,v)-L2(t,u)-L3]p+An−mZ−p_m. In an embodiment of the present disclosure Φ may be A. In another embodiment Φ may be Δ. In some embodiments of the present disclosure, M is a transition metal. In a related embodiment, p is an integer corresponding to the oxidation state of M. In some embodiments of the present disclosure, each of x, y, w, v, t, and u independently comprise R. In other embodiments, each of x, y, w, v, t, and u independently comprise S. In an embodiment of the present disclosure, each of L1, L2, and L3 independently is a ligand comprising a substituted diamine. In some embodiments, An″ comprises a lipophilic anion, where m is from 1 to 3, and where Z− comprises an optional second anion.
摘要翻译:在一些实施方案中,本公开涉及包含具有式Φ-[M(x,y)-L1(w,v)-L2(t,u)-L3] p + An- mZ-p_m。 在本公开的实施例中,Φ可以是A.在另一个实施例中,Φ可以是Δ。 在本公开的一些实施方案中,M是过渡金属。 在相关实施方案中,p是对应于M的氧化态的整数。在本公开的一些实施方案中,x,y,w,v,t和u中的每一个独立地包含R.在其它实施方案中,x ,y,w,v,t和u独立地包括S.在本公开的实施方案中,L1,L2和L3中的每一个独立地为包含取代的二胺的配体。 在一些实施方案中,An“包含亲脂性阴离子,其中m为1至3,并且其中Z-包含任选的第二阴离子。
摘要:
A catalyst which can catalyze ring-addition reaction of CO2 and an alkylene oxide at 0˜180° C. under 0.1˜8.0 MPa to produce a corresponding cyclic carbonate, and the preparation thereof. The catalyst is a conjugated microporous macromolecule polymer complexed with cobalt, chromium, zinc, copper or aluminium, and by using the macromolecule catalyst complexed with different metals to catalyze the reaction of CO2 and alkylene oxide at normal temperature and normal pressure, a yield of the corresponding cyclic carbonate of 35%-90% can be obtained. The catalyst is easy to recover and the re-use of the catalyst has no influence on the yield; additionally, the yield can reach over 90% by controlling the reaction conditions.
摘要:
The present invention relates to a process for the production of paper and board which comprises: (a) introducing one or more fillers, one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into an aqueous suspension comprising cellulosic fibres; and (c) dewatering the obtained suspension. The present invention also relates to a process for the production of a filler composition which comprises: (a) introducing one or more fillers, one or more anionic polysaccharides and one or more cationic agents into a mixing zone to form a filler composition; (b) introducing by means of a pump the filler composition into a storage tank.
摘要:
There is provided a metalloporphyrin complex represented by general formula (1): wherein M is a metal; A1 to A4 are independently of each other a substituent represented by general formula (2): -D-E+X− (2) wherein D is a divalent organic group having 1 to 20 carbon atoms; E+ is a quaternary ammonium group or quaternary phosphonium group having 3 to 60 carbon atoms; and X is a halogen atom. There is thus provided a metalloporphyrin complex which, when used as a carbon dioxide fixation catalyst, exhibits high catalytic activity, has a small environmental burden and can be easily synthesized.
摘要翻译:提供由通式(1)表示的金属卟啉络合物:其中M是金属; A1〜A4彼此独立地为通式(2)表示的取代基:-D-E + X-(2)其中D为碳原子数为1〜20的二价有机基团; E +是碳原子数为3〜60的季铵基或季鏻基; X为卤素原子。 因此,提供了作为二氧化碳固定催化剂使用的金属卟啉配合物,其催化活性高,环境负担小,易于合成。
摘要:
The present invention provides oligomeric metal complexes having more than one metal center and methods of using such complexes. The provided metal complexes are useful in the copolymerization of carbon dioxide and epoxides.
摘要:
The invention provides systems and methods for conducting reactions in which a reactant contacts a tethered catalyst and/or tethered chiral auxiliary in a microchannel and is converted to product.
摘要:
The present invention relates to titanium catalysts for synthesis reactions produced by bringing a reaction mixture comprising a titanium alkoxide and a ligand in contact with water, wherein the ligand is represented by the general formula (e): wherein R1, R2, R3, and R4 are independently a hydrogen atom, an alkyl group, or the like, and (A) represents a group with two or more carbon atoms. The titanium catalysts may be isolated in solid form and may be stored. The invention further relates to a process for cyanation of imines, wherein the process comprises reacting an imine with a cyanating agent in the presence of the titanium catalyst.
摘要:
A molecular recognition polymer enabling the reconstruction of the recognition field for a target molecule which is produced by applying the molecular imprinting method is disclosed. A molecular recognition polymer enabling the reconstruction of the recognition field for a target molecule which has a molecule interacting with the target molecule in the polymer and in which the recognition field for a target molecule has been constructed and the above-described molecule interacting with the target molecule is detachable and replaceable. This molecular recognition polymer can be produced by synthesizing a complex of the target molecule with a molecule capable of specifically and reversibly binding to the target molecule, copolymerizing this complex with a molecule interacting with the target molecule and a crosslinking agent to give a polymer, and then detaching the target molecule and the molecule interacting with the target molecule from the polymer thus obtained.