文献类型：期刊文献

英文题名：Formation of supramolecular nanobelt arrays consisting of cobalt(II) "picket-fence" porphyrin on Au surfaces

作者：Yoshimoto, Soichiro[1,3]; Sato, Kazuhiro[1]; Sugawara, Shoko[1]; Chen, Yu[2,4]; Ito, Osamu[2]; Sawaguchi, Takahiro[3]; Niwa, Osamu[3]; Itaya, Kingo[1]

机构：[1] Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 6-6-07 Aoba, Sendai 980-8579, Japan; [2] Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira, Aoba-ku, Sendai 980-8577, Japan; [3] National Institute of Advanced Industrial Science and Technology [AIST], Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan; [4] Lab. for Advanced Materials, Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China

年份：2007

卷号：23

期号：2

起止页码：809

外文期刊名：Langmuir

收录：EI(收录号：20070710423090);PubMed(收录号：17209638)

语种：英文

外文关键词：Cobalt compounds - Crystallography - Gold compounds - Porphyrins - Scanning tunneling microscopy - Supramolecular chemistry

摘要：Adlayers of cobalt(II) 5,10,15,20-tetrakis(α,α,α,α- 2-pivalamidophenyl)porphyrin (CoTpivPP) were prepared by immersing either Au(111) or Au(100) substrate in a benzene solution containing CoT pivPP molecules, and they were investigated in 0.1 M HClO4 and 0.1 M H2SO4 by cyclic voltammetry and in situ scanning tunneling microscopy (STM). The adlayer structure and electrochemical properties of CoTpivPP are compared to those of 5,10,15,20- tetraphenyl-21H,23H-porphine cobalt(II) (CoTPP). Characteristic nanobelt arrays consisting of CoTpivPP molecules were produced on both Au(111) and Au(100) surfaces. The stability of the nanobelt arrays was controlled by manipulating the electrode potential. On the other hand, the formation of nanobelt arrays consisting of O2-adducted CoTpivPP molecules depended upon the crystallographic orientation of Au. The state of O2 trapped in the cavity of CoTpivPP was distinctly observed in STM images as a bright spot in the nanobelt array formed on reconstructed Au(100)-(hex) surface, but not on Au(111) surface. This result suggests that the arrangement of underlying Au atoms plays an important role in the formation of nanobelt arrays with the sixth ligand coordination. ? 2007 American Chemical Society.