Molecular shapes, orientation, and packing of polyoxometalate arrays imaged by scanning tunneling microscopy

被引：75
|
作者：
Kaba, MS
Song, IK
Duncan, DC
Hill, CL
Barteau, MA [1 ]
机构：
[1] Univ Delaware, Dept Chem Engn, Ctr Catalyt Sci & Technol, Newark, DE 19716 USA
[2] Emory Univ, Dept Chem, Atlanta, GA 30322 USA
来源：
INORGANIC CHEMISTRY | 1998年 / 37卷 / 03期
关键词：
D O I：
10.1021/ic9705655
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Reported here are both STM images and spatially resolved tunneling spectra of four different polyoxometalate (POM) structural class members: Keggin structure, H-3[PW12O40] (spherical); Finke-Droege (FD) structure, Na-16[CU4(H2O)(2)(P2W15O56)(2)] (prolate spheroidal); Wells-Dawson (WD) structure, H-7[P2MO17VO62] (prolate spheroidal); and Pope-Jeannin-Preyssler (PJP) structure, K12.5Na1.5[NaP5W30O110] and (NH4)(14) [NaP5W30O110] (oblate spheroidal). In all four cases, the results demonstrate the formation of well-ordered 2-D inorganic POM anion arrays (composed of catalytically active molecular constituents) on graphite. Importantly, the image shapes and lattice spacings accurately reflect the POM anisotropies, permitting the determination of anion orientation with respect to the surface plane.
引用
收藏
页码：398 / 406
页数：9
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