ࡱ> *,)[ R%bjbjoAΐΐ !1118iD1S+*******$.0*Q "  * +4$4$4$ 8*4$ *4$4$:(,6)EUFd10" ( *#+0S+).1<##26)6)1|1$F)<|4$#d***$ S+    #2 : Nanoelectronics: Molecular Metal Wires and Related Molecular Materials Shie-Ming Peng Department of Chemistry, National Taiwan University, Taipei, Taiwan smpeng@ntu.edu.tw We have designed a series of new ligands such as oligo--pyridylamines, and used them to construct an unique class of quadruple helix of metal strings. This achievement leads to a new direction to the application of molecular wires in the nanoelectronics. The outline is as follows: I. Linear Metal String Complexes (1) % Synthesis, Structure, Bonding II. Potential Application as Molecular Metal Wires & Molecular Switches (2) % STM-bj Study on the Conductivity of Metal Strings % Comparative Study on the I-V Characterisics (Theory V.S. Experiment) III. Tuning of the Metal Strings (3-9) % Naphthyridyl Amino Ligands: Low Oxidation Mixed Metal Strings % Asymmetrical Ligands: Toward Molecular Rectifier % Heteronuclear Metal String Complexes % Chiral Quadruple Helixes IV. Conclusion Fig.1 Metal Strings of Oligo-(-pyridylamido Ligands Reference C.-Y. Yeh, C.-C. Wang, Y.-H. Chen and S.-M. Peng, in Redox Systems Under Nano-Space Control, Ed: T, Hirao, Springer, Germany 2006, Ch. 5. I.-W. P. Chen, M.-D. Fu, W.-H. Tseng, J.-Y. Yu, S.-H. Wu, C.-J. Ku, C.-H. Chen, and S.-M. Peng, Angew. Chem. Int. Ed. Engl. 2006, 5414. (a) C.-H. Chien, J.-C. Chang, C.-Y. Yeh, G.-H. Lee, J.-M. Fang and S.-M. Peng, Dalton Trans. 2006, 2106. (b) C.-H. Chien, G.-H. Lee, Y. Song and S.-M. Peng, Dalton Trans. 2006, 3249. M.-M. Rohmer, I. P.-C. Liu, J.-C. Lin, M.-J. 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Lee, G.-H. Lee, M. Benard, X. Lopez, S.-M. Peng, Angew. Chem. Int. Ed. Engl. 2007, 46, 3533. I. P.-C. Li, W.-Z. Wang, and S.-M. Peng, Chem. Commun. 2009, 4323-4331. R. H. Ismayilov, W.-Z.Wang, G. H. Lee, C. Y. Yeh, S. A. Hua, Y. Song, M. M. Rohmer, M. Bnard, S.-M. Peng, Angew. Chem. Int. Ed., 2011, 50, 2045-2048. I. P.-C. Liu, C.-H. Chen, S.-M. Peng, Bull. Jpn. Soc. Coord. Chem., 2012, 59, 1-8. M.-C. Cheng, C.-L. Mai, C.-Y. Yeh, G.-H. Lee, S.-M. Peng, Chem. Commun. 2013, 49, 7938-7940 M.-J. Huang, S.-A Hua, M.-D. Fu, G.-C. Huang, C. Yin, C.-H. Ko, C-K. Kuo, C-H. Hsu, G.-H. Lee, K.-Y. Ho, C.-H. Wang, Y.-W. Yang, I.-C Chen, S.-M. Peng, C.-h. Chen, Chem. Eur. 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