| 介孔氧化硅孔径尺寸对Eu(Ⅲ)配合物的影响 |
| Effect of Pore Size on Assembly of Eu(Ⅲ) Complex in Mesoporous Silica |
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| 摘要: 分别以十六烷基三甲基溴化铵(CTAB)和聚乙氧基-聚丙氧基-聚乙氧基三嵌段共聚物(P123)为模板剂、正硅酸乙酯(TEOS)为硅源，采用水热法合成了有序介孔分子筛MCM-41和SBA-15。选择Eu(DBM)3phen为客体，有序介孔氧化硅MCM-41和SBA-15为载体，分别在氯仿中进行分子组装，制备出具有较强发光性能的介孔复合材料Eu(DBM)3phen/APTES-MCM-41(EAM)和Eu(DBM)3phen/APTES-SBA-15(EAS)。采用XRD、TEM、N2吸附-脱附和荧光光谱等对产物的结构与性能进行了分析。结果表明，Eu(DBM)3phen组装进有序介孔氧化硅的孔道中后，发光纯度提高。而且孔径越小，发光纯度越高。选用较大孔径的SBA-15为载体，在不显著影响发光纯度的同时，可以获得较高的发光强度。 |
| 关键词: 稀土 MCM-41 SBA-15 配合物 光致发光 发光纯度 |
| 基金项目: |
| Abstract: Ordered mesoporous molecular sieves MCM-41 and SBA-15 were synthesized by hydrothermal reaction with tetraethyl orthosilicate (TEOS) as the silica source, cetyltrimethylammonium bromide (CTAB) and poly(ethylene glycol)x-poly(propylene glycol)y-poly(ethylene glycol)z (P123) as the template, respectively. Eu(DBM)3phen complexes guests were assembled into the ordered mesoporous silica in chloroform to prepare the luminescent composites Eu(DBM)3phen/APTES-MCM-41 (EAM) and Eu(DBM)3phen/APTES-SBA-15 (EAS). Structure characteristics and optical properties of the synthesized samples were investigated by means of XRD, TEM, N2 adsorption-desorption and photoluminescence spectroscopy. The results indicate that the mesoporous composites exhibite high optical purity with Eu(DBM)3phen assembling, the smaller the pore size, the better the optical purity. However, the intensity of the main emission peak decreases with the decreasing in pore size. So, SBA-15 would be the better host materials to obtain both high intensity and purity of the composites. |
| Keywords: rare earth MCM-41 SBA-15 complex photoluminescence optical purity |
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| 赵春霞,陈文,刘琦,田高.介孔氧化硅孔径尺寸对Eu(Ⅲ)配合物的影响[J].无机化学学报,2006,22(9):1600-1604. |
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