摘要
Two polyoxometalate-based host-guest compounds,(HL1)2(HPW12O40)〜11H2O(1),(HL2)3(PWi2O40)·3H2O(2)(L_(1)=guanine,L_(2)=2-(1H-1,2,4-triazol-3-yl)pyridine),were synthesized under hydrothermal conditions and characterized by EA,PXRD,TG,FT-IR and X-ray single-crystal diffraction.Compound 1 crystallizes in trigonal space group P-3 with a=18.2917(5),b=18.2917(5),c=13.5441(5)A,V=3924.5(3)A^(3),Z=3,Mr=3383.26 g/mol,pcak=4.036 g/cm^(3),F(000)=4137,=48.532 mm^(-1),GOOF=1.062,the final R=0.0713 and wR=0.1865 for 9037 observed reflections with I>2σ(I).Compound 2 crystallizes in trigonal space group R-3 with a=19.0017(6),b=19.0017(6),c=25.6361(9)A,V=8016.2(6)A^(3),Z=6,Mr=3372.45 g/mol,p_(calc)=4.188 g/cm,F(000)=8886,μ=47.644 mm^(-1),GOOF=1.077,the final R=0.0380 and wR=0.0976 for 5904 observed reflections with I>2σ(I).These two compounds can catalyze selective oxidation of aniline with H2O2 as the oxidant.Under optimal conditions,the conversion of aniline with compound 1 can reach up to 91.25%,and the selectivity of nitrosobenzene is 78.81%.
作者
WANG Song-Xia
WANG Sa-Sa
WU Xiao-Yuan
YANG Wen-Bin
LU Can-Zhong
王宋霞;王洒洒;吴小园;杨文斌;卢灿忠(Fujian Normal University,Fuzhou 350007,China;CAS Key Laboratory of Design and Assembly of Functional Nanostructures,and Fujian Provincial Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;University of Chinese Academy of Sciences,Beijing 100049,China)
基金
This work was supported by the Key Research Program of Frontier Science,CAS(QYZDJ-SSW-SLH033)
the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB20000000)
the National Natural Science Foundation of China(21773247,21521061,21875252,52073286)。
