STM/STS observation of polyoxoanions on HOPG surfaces:: the wheel-shaped [Cu20Cl(OH)24(H2O)12(P8W48O184)]25- and the ball-shaped [{Sn(CH3)2(H2O)}24{Sn(CH3)2}12(A-PW9O34)12]36-

被引:56
作者
Alam, MS
Dremov, V
Muller, P
Postnikov, AV
Mal, SS
Hussain, F
Kortz, U
机构
[1] Univ Erlangen Nurnberg, Inst Phys 3, D-91058 Erlangen, Germany
[2] Paul Verlaine Univ, LPMD, IPC, F-57078 Metz, France
[3] Inst Met Phys, Ekaterinburg 620219, Russia
[4] Int Univ Bremen, Sch Engn & Sci, D-28725 Bremen, Germany
关键词
D O I
10.1021/ic051586z
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A combination of scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) techniques have been performed on the wheel-shaped [CU20Cl(OH)(24)(H2O)(12)(P8W48O184)](25-) and the ball-shaped [{Sn(CH3)(2)(H2O)}(24){ Sn(CH3)(2)}(12)(A-PW9O34)(12)](36-) deposited on highly oriented pyrolytic graphite surfaces. Small, regular molecule clusters, as well as separated single molecules, were observed. The size of the molecules is in agreement with the data determined by X-ray crystallography. In STS measurements, we found a rather large contrast at the expected location of the Cu metal centers in our molecules, i.e., the location of the individual Cu ions in their organic matrix is directly addressable by STS.
引用
收藏
页码:2866 / 2872
页数:7
相关论文
共 45 条
[31]   The deposition of metallopeptide-based coordination polymers on graphite substrates:: Effects of side-chain functional groups and local surface structure [J].
Novokmet, S ;
Alam, MS ;
Dremov, V ;
Heinemann, FW ;
Müller, P ;
Alsfasser, R .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (05) :803-806
[32]   Tip and surface determination from experiments and simulations of scanning tunneling microscopy and spectroscopy -: art. no. 056103 [J].
Paz, O ;
Brihuega, I ;
Gómez-Rodríguez, JM ;
Soler, JM .
PHYSICAL REVIEW LETTERS, 2005, 94 (05)
[33]  
Pope M.T., 2004, COMPREHENSIVE COORDI, V4, P635, DOI DOI 10.1016/B0-08-043748-6/03035-8
[34]  
Pope M.T., 1983, HETEROPOLY ISOPOLY O
[35]  
Pope M.T., 2001, POLYOXOMETALATE CHEM, DOI DOI 10.1007/0-306-47625-8
[36]   POLYOXOMETALATE CHEMISTRY - AN OLD FIELD WITH NEW DIMENSIONS IN SEVERAL DISCIPLINES [J].
POPE, MT ;
MULLER, A .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1991, 30 (01) :34-48
[37]  
Pope MT, 1994, Polyoxometalates: from platonic solids to antiretroviral activity
[38]   Current imaging tunneling spectroscopy of an alkyl cyanobiphenyl liquid crystal [J].
Rivera, M ;
Williamson, RL ;
Miles, MJ .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1996, 14 (02) :1472-1475
[39]   Exploring supramolecular interactions and architectures by scanning force microscopies [J].
Samorì, P .
CHEMICAL SOCIETY REVIEWS, 2005, 34 (07) :551-561
[40]   The SIESTA method for ab initio order-N materials simulation [J].
Soler, JM ;
Artacho, E ;
Gale, JD ;
García, A ;
Junquera, J ;
Ordejón, P ;
Sánchez-Portal, D .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (11) :2745-2779