| Modified silicone oil has the properties of dimethyl silicone oil, which are hydrophobicity, lubrication, low volatility, antifoaming capability and resistance to high and low temperatures, resistance and oxidation, and it also has the reactivity with functional groups, easy emulsification, interface activity and other characteristics. Aminopropyl modified silicone oil has high reaction activity, which allow it to have both addition reaction with unsaturated bond such as epoxy, isothiocyanate groups, and condensation reaction with compounds containing the carbonyl aldehyde and ketone. Many compounds containing special structures can be introduced into polysiloxane through the modification process of amino silicone oil, which can give amino silicone oil new properties and widened the research scope of polysiloxane.Rare earth elements have unique electronic structure and excellent photophysical abilities. Prepared by the condensation reaction between amino and aldehyde or ketone, schiff base compounds are imines with C=N bonds. They can form complexes with lanthanide ions and have been proved to be good ligands. Compared with regular small molecules’s rare earth complexes, besides unique optical properties, high polymer’s rare earth complexes have high polymer easy processing, light quality, impact resistance, stability, and higher characteristic prospects. Aminopropyl silicone oils were modified by amination reaction to prepare some functional polysiloxane ligands, and then the rare earth ions were grafted into polysiloxanes via chemical to achieve excellent compounds with luminescent properties, which would have essential theoretical significance and application value.A series of aminopropyl side silicone oils with different amine values had been synthesized through bulk copolymerization of octamethylcyclotetra siloxane(D4) and aminosilan monomer named3-aminopropylmethyldiethoxysilane. Experiment results showed that the optimum synthesis conditions of side aminopropyl silicone oils were that:the KOH catalyst dosage was0.2%, the H2O and3-aminopropylmethyldiethoxy-silane mole ratio was1:2, the dimethyl sulfoxide(DMSO) dosage was1%and reacted at90℃-100℃. By subjecting to hydrosilylation1,1,3,3-tetramethyl-disiloxane and allyl-amine in the presence of a platinum oxide(PtO2) catalyst, the α,ω-bis(3-aminopropyl)-tetramethyldisiloxane was synthesized. By using1,1,3,3-tetramethyl-disiloxane as a model compound and Si-H stretching vibration(2127cm-1) as quantitative analysis absorption band, the standard curve was set up of which the linear range was CH=(1.00-700.00)×10-6g/mL. The kinetics studying of hydrosilylation of hydrogen (poly) siloxane and double bond of an unsaturated compound was carried out by quantitative analysis of IR spectroscopy.Diaminopropyl terminated polysiloxanes were synthesized by ring opening polymerization from octamethylcyclotetra siloxane and α,ω-bis(3-aminopropyl) tetra-ethyldisilox-ane with tetramethylammonium hydroxide silanolate as catalyst. The structure of the amino silicone oils were investigated via IR and1H-NMR.A series of imined polysiloxanes with excellent photophysical abilities had been synthesized through condensation reaction from aminopropyl silicone, salicylald-ehyde and2-carboxybenzaldehyde benzoyl hydrazone, then eight new lanthanide (Ⅲ)-imined polysiloxane complexes had been prepared by the coordination reaction. The lanthanide(Ⅲ)-salicylaldimined polysiloxane complexes had been characterized by FT-IR spectra,1H-NMR, UV-Vis absorption spectra, fluorescence spectra and TGA according to the relevant literature. Studies showed that the ligand coordinated to lanthanide ions via oxygen atom or the imine-nitrogen. We also found that the fluorescence gradually strengthened as the amine groups increased and observed the characteristics red(green) launch of Eu3+(Tb3+). Compared with salicylaldimine schiff base ligand, The2-carboxybenzaldehyde imine can sensitize fluorescence of rare earth ions more better. |
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