摘要
多金属氧酸盐(也称金属一氧簇)由于在催化、材料及医药等领域的应用日益广泛而备受关注.近年来,一些新颖的非经典结构的化合物不断被合成出来.如带二帽的Keggin结构化合物[V_(15)O_(42)]^(9-[1]),[PV_(14)O_(42)]^(9-[2]),[AsV_(14)0_(42)]^(9-[3]),[{Mo_(8)V_(7)0_(42)}_(2)]^(14-[4]),[(AsO)_(2)(AsO_(4))V_(12)0_(36)]^(13-[5]),[PMo_(8)V_(6)O_(42)]^(5-[6]),[PMosV_(9)O_(42)]^(9-[7])和带四帽的Keggin结构的化合物[PMo_(8)V_(8)O]^(5-[8]),[PMo_(8)V_(8)O_(44)]^(6-[9]),[AsMo_(8)V_(8)0_(44)]^(7-[10])和[Mo_(12)O_(30)(μ一OH)_(10)H_(2){Ni(H_(2)O)_(3)}_(4)]^([11])等.
A Hydrothermal reaction of MoO_(3),NiCl_(2)·6H_(2)O,WO_(3)and H_(2)O with a molar ratio of 1∶0.6∶1∶83.3 gives a rhombic-shaped black crystal[NiMo_(12)O_(40)H_(10){Ni(H_(2)O)_(3)}_(4)].It crystallizes in a tetragonal system with space group I41/amd and unit cell parameters a=b=1.5184(2)nm,c=3.0829(6)nm,Z=4,V=7.108(2)nm 3,R=0.0671,wR=0.2178.The compound possesses a four-capped Keggin structure.The structure of the Keggin-[NiMo_(12)O_(40)H_(10)]^(8-)consists of twelve MoO_(6)octahedrons and a NiO_(4)tetrahedron on the center.Four[Ni(H_(2)O)_(3)]^(2+)at the cap positions are linked to Keggin-structure by threeμ3-O,respectively.The calculation of bond valence shows that the oxidation state of Mo in the compound is+5.
作者
苏畅
徐吉庆
曾庆新
崔小兵
李传碧
张丽娟
SU Chang;XU Ji-Qing;ZENG Qing-Xin;CUI Xiao-Bing;LI Chuan-Bi;ZHANG Li-Juan(State Key Laboratory of Inorganic Syrthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130023,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第7期1166-1168,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20271021)资助
关键词
钼镍氧簇
四帽Keggin结构
水热合成
Molybdenum-nickel-oxo cluster
Four-capped Keggin structure
Hydrothermal synthesis
