核壳壳复合材料SiO₂@PMDA-Si-Tb@SiO₂和SiO₂@PMDA-Si-Tb-phen@SiO₂的合成及发光性质

Synthesis and Luminescence Properties of Core-Shell-Shell Composites: SiO₂@PMDA-Si-Tb@SiO₂ and SiO₂@PMDA-Si-Tb-phen@SiO₂.

作者信息

Feng Lina, Li Wenxian, Bao Jinrong, Zheng Yushan, Li Yilian, Ma Yangyang, Yang Kuisuo, Qiao Yan, Wu Anping

机构信息

Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China.

Inner Mongolia Autonomous Region Food Inspection Test Center, Hohhot 010010, China.

出版信息

Nanomaterials (Basel). 2019 Feb 2;9(2):189. doi: 10.3390/nano9020189.

DOI:10.3390/nano9020189

PMID:30717359

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6410162/

Abstract

Two novel core-shell composites SiO₂@PMDA-Si-Tb, SiO₂@PMDA-Si-Tb-phen with SiO₂ as the core and terbium organic complex as the shell, were successfully synthesized. The terbium ion was coordinated with organic ligand forming terbium organic complex in the shell layer. The bi-functional organosilane ((HOOC)₂C₆H₂(CONH(CH₂)₃Si(OCH₂CH₃)₃)₂ (abbreviated as PMDA-Si) was used as the first ligand and phen as the second ligand. Furthermore, the silica-modified SiO₂@PMDA-Si-Tb@SiO₂ and SiO₂@PMDA-Si-Tb-phen@SiO₂ core-shell-shell composites were also synthesized by sol-gel chemical route. An amorphous silica shell was coated around the SiO₂@PMDA-Si-Tb and SiO₂@PMDA-Si-Tb-phen core-shell composites. The core-shell and core-shell-shell composites both exhibited excellent luminescence in solid state. The luminescence of core-shell-shell composites was stronger than that of core-shell composites. Meanwhile, an improved luminescence stability property for the core-shell-shell composites was found in the aqueous solution. The core-shell-shell composites exhibited bright luminescence, high stability, long lifetime, and good solubility, which may present potential applications in the bio-medical field.

摘要

成功合成了两种新型的核壳复合材料SiO₂@PMDA-Si-Tb、SiO₂@PMDA-Si-Tb-phen，它们以SiO₂为核，以铽有机配合物为壳。铽离子与有机配体配位，在壳层形成铽有机配合物。双官能有机硅烷((HOOC)₂C₆H₂(CONH(CH₂)₃Si(OCH₂CH₃)₃)₂(简称为PMDA-Si)用作第一配体，邻菲罗啉用作第二配体。此外，还通过溶胶-凝胶化学路线合成了二氧化硅改性的SiO₂@PMDA-Si-Tb@SiO₂和SiO₂@PMDA-Si-Tb-phen@SiO₂核壳壳复合材料。在SiO₂@PMDA-Si-Tb和SiO₂@PMDA-Si-Tb-phen核壳复合材料周围包覆了一层无定形二氧化硅壳。核壳和核壳壳复合材料在固态下均表现出优异的发光性能。核壳壳复合材料的发光强度比核壳复合材料更强。同时，在水溶液中发现核壳壳复合材料具有更好的发光稳定性。核壳壳复合材料具有明亮的发光、高稳定性、长寿命和良好的溶解性，在生物医学领域可能具有潜在应用。