Controllable Synthesis and Catalytic Performance of Nanocrystals of Rare-Earth-Polyoxometalates
作者:Shujun Li、Yanfang Zhou、Qingpo Peng、Ruoya Wang、Xiaoge Feng、Shuxia Liu、Xiaoming Ma、Nana Ma、Jie Zhang、Yi Chang、Zhiping Zheng、Xuenian Chen
DOI:10.1021/acs.inorgchem.8b00763
日期:2018.6.4
applications. Here, we synthesized a family of monomeric RE-POMs by the self-assembly of Ta/W mixed-addendum POM P2W15Ta3O62} and rare-earth (RE) ions. These RE-POMs with molecular formulas of [RE(H2O)7]3P2W15Ta3O62·nH2O (RE = Y, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) are all electroneutral molecular clusters, insoluble in water and common organic solvents. The electronic structures, electrochemical properties
稀土多金属氧酸盐(RE-POMs)催化剂的纳米晶体的大规模分离在基础研究和应用中很重要。在这里,我们通过Ta / W混合齿顶POM P 2 W 15 Ta 3 O 62 }和稀土(RE)离子的自组装合成了一系列单体RE-POM 。这些分子式为[RE(H 2 O)7 ] 3 P 2 W 15 Ta 3 O 62 · n H 2的RE-POMO(RE = Y,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb和Lu)都是电子中性分子簇,不溶于水和常见的有机溶剂。已经通过实验和计算方法研究了它们的电子结构,电化学性质和催化活性。特别地,基于温和且可控的合成方法,已经开发了一种方便且可控的方法来制备这些单体的纳米晶体和自组织的聚集体。它们对氰基硅烷化显示出显着的非均相催化活性。理论计算表明,标题化合物中RE的Lewis酸强度增加,而粒径减小则有助于其高催化性能。