Palladium coordination polymer molecule aggregate catalysis material as well as preparation method and application thereof

A technology for molecular aggregates and catalytic materials, which is applied in the field of palladium coordination polymer molecular aggregate catalytic materials and their preparation, can solve the problems of difficult separation of catalysts and reactants/products, and achieves efficient recyclability and simple preparation technology. Easy and convenient operation

Inactive Publication Date: 2009-12-23
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to obtain higher catalytic efficiency and solve the problem of difficult separat...

Method used

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  • Palladium coordination polymer molecule aggregate catalysis material as well as preparation method and application thereof
  • Palladium coordination polymer molecule aggregate catalysis material as well as preparation method and application thereof
  • Palladium coordination polymer molecule aggregate catalysis material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Using the Langmuir-Blodgett membrane preparation technique, add 0.002M dichloro-2,2'-bipyridine palladium (Pd(en) 2 Cl 2 ) aqueous solution, and then drop about 100 microliters of 0.5mM metal tetrapyridyl porphyrin (MTPyP) chloroform solution at the gas-liquid interface with a micro-syringe, after the chloroform solvent is completely volatilized and the interface coordination reaction is completed (usually required More than 20 minutes), compress the surface until the surface pressure rises to about 20mN / m, keep the surface pressure, use the LB film preparation technology to lift the film, and deposit metal porphyrin-containing palladium coordination polymer molecular aggregation on the clean quartz substrate surface Multilayer films of bulk catalytic material Pd-MTPyP.

Embodiment 2

[0055] Using the Langmuir-Blodgett membrane preparation technique, add potassium tetrachloropalladate (KP) containing 0.002M in the cleaned Langmuir tank 2 PdCl 4 ) aqueous solution, then drop about 100 microliters of chloroform solution of 0.5mM polyvinylpyridine (PVP) at the gas-liquid interface with a micro-syringe, after the chloroform solvent is completely volatilized and the interface coordination reaction is completed (usually more than 20 minutes ), compress the surface until the surface pressure rises to about 20mN / m, keep the surface pressure, and use the LB film extraction technology to deposit a multilayer film of palladium coordination polymer molecular aggregate catalytic material Pd-PVP on the surface of a clean glass substrate.

[0056] 2. The three-dimensional molecular aggregate catalytic material of the palladium coordination polymer is directly assembled on the solid surface by using the molecular layer-by-layer assembly technology.

[0057] The preparatio...

Embodiment 3

[0063] A. Preparation of solid substrate: Wash the mica substrate and soak it with 4% sodium hydroxide for 24 hours to obtain a hydroxylated hydrophilic solid substrate, then use 2% chlorobenzylchlorosilane in chloroform or Methanol solution soaking, reacting to form a self-assembled silanized solid substrate modified with an active chlorobenzylchlorosilane monolayer film;

[0064] B. Formation of the polymer layer: the mica substrate is placed in an organic solution of 2mM polyvinylpyridine, heated and refluxed for 10 hours, and a layer of polyvinylpyridine polymer layer is formed on the solid surface, and the residue on the mica substrate is rinsed with methanol polymer;

[0065] C, the preparation of catalytic material: the mica substrate is soaked in 0.002mM potassium tetrachloropalladate (K 2 PdCl 4 ) in the aqueous solution, the palladium coordination ion carries out the coordination reaction with the pyridyl group on the macromolecule, and forms a palladium ion layer ...

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Abstract

The invention relates to a palladium coordination polymer molecule aggregate catalysis material as well as a preparation method and an application thereof. The catalysis material is a coordination polymer molecule aggregate catalysis material formed by self-assembling on the surface of a solid substrate, the precursor of the catalysis material comprises palladium coordination ion as well as pyridine containing multidentate ligand or high molecular ligand, wherein the palladium coordination ion is selected from one of tetrachloro combined palladium acid radical, dichloro-2, 2'-dipyridine palladous, and dichloroacetamide palladous, and the pyridine containing multidentate ligand or high molecular ligand is selected from one of 4, 4'-combined pyridine, 2, 4, 6- collidine triazine, metal or hollow tetra pyridyl porphyrin, trans-1, 2- collidine ethylene, combined dipyridylzinc thiocyanate and polyethylene pyridine. LB film preparation technology or layered assembly method is adopted for organism selective ethylenic bond organic hydrogenation reaction, thus having high catalysis efficiency, easy realization in separation of catalyst and reactant and product, convenient operation and low cost.

Description

technical field [0001] The invention belongs to the technical field of molecular materials and chemical catalysis, and specifically provides a palladium coordination polymer molecular aggregate catalytic material and its preparation method and application by using molecular assembly technology. Background technique [0002] Different from the traditional top-down method, the bottom-up molecular assembly technology developed at the end of the last century is to design and prepare molecular materials with specific functions based on the structure and characteristics of a single molecule, using intermolecular interactions, and These molecular materials are used to assemble molecular devices and molecular machines to realize the miniaturization and multifunctionalization of products. The techniques of molecular assembly mainly include: Langmuir-Blodgett (LB) membrane, self-assembled membrane and layer-by-layer assembled membrane; the intermolecular forces they rely on are usuall...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J37/00C07B35/02C07C5/05C07C17/354C07C41/20C07C45/62C07C67/303
Inventor 钱东金任志斌
Owner FUDAN UNIV
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