Controllable Synthesis and Catalytic Performance of Nanocrystals of Rare-Earth-Polyoxometalates

被引:29
作者
Li, Shujun [1 ]
Zhou, Yanfang [1 ]
Peng, Qingpo [1 ]
Wang, Ruoya [1 ]
Feng, Xiaoge [1 ]
Liu, Shuxia [2 ]
Ma, Xiaoming [1 ]
Ma, Nana [1 ]
Zhang, Jie [1 ]
Chang, Yi [1 ]
Zheng, Zhiping [3 ,4 ]
Chen, Xuenian [1 ]
机构
[1] Henan Normal Univ, Sch Chem & Chem Engn, Henan Key Lab Boron Chem & Adv Energy Mat, Xinxiang 453007, Henan, Peoples R China
[2] Northeast Normal Univ, Coll Chem, Minist Educ, Key Lab Polyoxometalates Sci, Changchun 130024, Jilin, Peoples R China
[3] Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518000, Guangdong, Peoples R China
[4] Southern Univ Sci & Technol, Dept Chem, Shenzhen 518000, Guangdong, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
LANTHANIDE COMPLEXES; BASE CATALYSIS; ACID; CYANOSILYLATION; CLUSTERS; POLYTANTALOTUNGSTATES; EFFICIENT; HYBRIDS; OXIDE; W-183;
D O I
10.1021/acs.inorgchem.8b00763
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Large-scale isolation of nanocrystals of rare-earth-polyoxometalates (RE-POMs) catalysts is important in fundamental research and 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)](3)-P2W15Ta3O62.nH(2)O (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, and catalytic activities of them have been investigated by experimental and computational methods. In particular, based on a mild and controllable synthetic process, a convenient and controllable approach to prepare nanocrystals and self-organized aggregates of these monomers has been developed. They exhibit remarkable heterogeneous catalytic activity for cyanosilylation. Both the increased Lewis acid strength of RE in the title compounds, as indicated by theoretical calculations, and the decreased particle size contribute to their high catalytic performances.
引用
收藏
页码:6624 / 6631
页数:8
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