摘要
以十六烷基三甲基溴化铵(CTAB)为模板剂,正硅酸乙酯(TEOS)为硅源,采用水热法制备了晶粒平均尺寸8nm纳米MCM-41;以稀土铕为中心,水杨酸为第一配体,邻菲罗啉为第二配体,合成了稀土配合物Eu(Sal)_3Phen。用浸渍法将Eu(Sal)_3Phen组装到MCM-41分子筛中成为Eu(Sal)_3Phen/MCM-41杂化发光材料。红外分析表明稀土配合物成功组装到MCM-41分子筛的孔道中,X射线衍射表明MCM-41的结晶性好,组装后MCM-41的晶面衍射峰强度稍减弱,扫描电镜表明产品为六方均匀有序结构。在365nm激发波长,发射波长为621nm,为典型红光,是(5D0-7F2)发射的结果,Eu3+掺量9%时发光强度达最大,稀土配合物组装后性能更加稳定,在浓度<12%未发生浓度猝灭。
The mesoporous silica materials MCM-41 were synthesized by employing hydrothermal method with cetyhrimethylammoniurn bromide （CTAB） as a surfactant and tetraethylorthosilicate （TEOS） as Si source. The solid ternary rare earth complexes Eu（Sal） 3 Phen was synthesized by ethanol solution method using Eu^3＋ as central ion, salicylic acid as first ligand, and orthophenanthrene as second ligande. Then the as-synthesized rare earth of Eu（Sal）3 Phen and MCM-41 molecular sieve were assembled by using impregnation method. Samples were characterized by XRD, IR, SEM and other methods. The results showed that the as-synthetized products were ordered mesoporous materials with good ordered structure and typical uniform aperture size. IR showed that rare earth complexes successfully entered into the MCM-41 pore. XRD analysis showed Eu（Sal）aPhen had good crystallinity. MCM-41 diffraction peak intensity became weak and the ordered mesoporousmaterials reduced after assembling. Underexcitation of 365 nm either near-UV or blue light, intense red emission with a main peak of 623 nm is observed, ascribed to the ^5D0-^7F2 transition of Eu^3＋ ions.When the doped-Eu^3＋ amount is 9%,the luminescent intensity reaches to the maximum. Meanwhile in the scope of the concentration of 12%, there are no quenching phenomenon.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2017年第10期10188-10191,共4页
Journal of Functional Materials
基金
国家青年科学基金资助项目(21205092)
陕西省教育厅基金资助项目(16JK2091)
