Anionic rare earth complex and hydrotalcite composite luminescent ultra slim membrane and preparation method thereof

Abstract

The invention discloses a synthesis of anionic rare earth complex [RE(III) (DBM) 3bath] (wherein, RE is Eu, Tb, Dy and other rare earth ions; DBM (dibenzoylmethane) is a first ligand; bath (bathophenanthrolinedisulfonic acid disodium salt trihydrate) is a second ligand) which belongs to the field of luminescent material and hydrotalcite composite luminescent ultra slim membrane and preparation method thereof. The concrete steps are as follows: preparing an anionic rare earth organic complex; preparing a hydrotalcite colloidal solution; preparing a rare earth organic complex aqueous solution; assembling substrates after hydrophilic treatment in two solutions alternatively. The invention employs rigid structure of the hydrotalcite layer plate and confinement effect of two dimension space, thereby realizing immobilization of rare earth complex and ordered arrangement on molecule scale, improving homogeneity and continuity of rare earth complex membrane, and reducing fluorescence quenching generated by molecular aggregation between complexes; the membrane preparation process is easy to operate, and accurate controls of luminous intensity of the rare earth complex in the membrane and the membrane thickness can be realized by changing assembling frequencies.

Description

technical field [0001] The invention belongs to the technical field of composite luminescent materials, and in particular provides a rare earth complex [RE(DBM) 3 bath] and hydrotalcite composite luminescent ultra-thin film and its preparation method. Background technique [0002] In recent years, rare earth organic complexes have been greatly developed, and a group of functional rare earth complex materials with superior performance has greatly promoted the progress of rare earth chemistry and rare earth material science. The excited ligand of the rare earth organic complex transfers the excited energy to the central rare earth ion through non-radiative intramolecular energy transfer, so that the rare earth organic complex emits the characteristic fluorescence of rare earth elements. Rare earth organic complexes have the advantages of high luminous efficiency of rare earth ions, high color purity, low excitation energy required by organic ligands, high absorption efficienc...

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Problems solved by technology

However, due to the limitation of the assembly force, the research on the assembly of hydrotalcite nanosheets and rare earth organic complex anions with photofunctional properties to form ultra-thin films has not been reported so far.

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