Covalent grafting europium Eu (Ⅲ), ruthenium Ru (Ⅱ) complex hybrid materials Preparation

Title: Covalent grafting europium Eu (Ⅲ), ruthenium Ru (Ⅱ) complex hybrid materials Preparation and luminescence properties ofAuthor: WangDegree-granting units: Northeast Normal UniversityKeywords: Europium;; MCM-41;; light stability;; covalent bond;; ruthenium complexesSummary:

Rare earth complexes with a high luminous efficiency, narrow emission line and a longer fluorescence lifetime, etc., transition metal Ru (II) complexes also have a stable photochemical, photophysical properties, high thermal stability, a longer light-emitting lifetime. Magnetic lifter But its poor photochemical stability of its potential value can not be fully realized. Usually rare earth and transition metal complexes to be fixed in an effective carrier in order to further improve these shortcomings and improve the already excellent performance. Mesoporous molecular sieve with a large specific surface area, pore structure and the rules of good thermal stability, the rare earth complexes and the Ru (II) complexes with a combination of mesoporous molecular sieves, which can effectively improve the light stability of the complexes to improve the luminous efficiency, access to excellent performance pH sensor. The paper work for the above issues are as follows:

(A) to study how covalent Si-CH2 to Eu (III) complexes covalently grafted onto the mesoporous MCM-41 hybrid material of the skeleton, the increased stability and luminescence properties. Thus synthesis of organic ligands 2 - (4'-hydroxyphenyl) imidazo [4,5-f] -1,10 - phenanthroline, through its organic modification, hydrolysis of organic synthesis that can be modified silicon ester derivatives, and rare earth metals to not only Eu (III) coordination, but also together with TEOS hydrolysis and condensation reactions were prepared by covalent grafting of organic - inorganic hybrid materials Eu-MCM- 41. Systematic study of the covalent grafting complexes Eu-MCM-41 structure, excited-state lifetime and stability, we can see by comparing the samples with covalent grafting and pure than physical embedding better light stability of the complexes, the other by a total of Price grafting methods to effectively solve the problem of rare earth complexes leakage analysis.

(B) the condensation reaction by hydrolysis of transition metal Ru (II) complexes covalently grafted to the molecular sieve MCM-41 frame. We http://www.999magnet.com/products/131-magnetic-lifter study the oxygen sensing properties based on the study of the pH optical sensor performance. MCM-41 as the unique pore structure, covalent grafting Ru-MCM-41 complex luminescence intensity increases with decreasing pH, showing a good performance of the pH sensor. The pH sensor obtained mesoporous materials can improve the performance of micro-phase structure of the carrier to further enhance its bio-sensing in the field of applications possible.Degree Year: 2010