The first heteropentanuclear extended metal-atom chain: [Ni⁺-Ru₂⁵⁺-Ni²⁺-Ni²⁺ (tripyridyldiamido)₄(NCS)₂]

Min-Jie Huang; Shao-An Hua; Ming-Dung Fu; Gin-Chen Huang; Caixia Yin; Chih-Hung Ko; Ching-Kuo Kuo; Chia-Hung Hsu; Gene-Hsiang Lee; Kuan-Yi Ho; Chia-Hsin Wang; Yaw-Wen Yang; I-Chia Chen; Shie-Ming Peng; Chun-hsien Chen

doi:10.1002/chem.201400067

The first heteropentanuclear extended metal-atom chain: [Ni⁺-Ru₂⁵⁺-Ni²⁺-Ni²⁺ (tripyridyldiamido)₄(NCS)₂]

Chemistry. 2014 Apr 14;20(16):4526-31. doi: 10.1002/chem.201400067. Epub 2014 Mar 27.

Authors

Min-Jie Huang¹, Shao-An Hua, Ming-Dung Fu, Gin-Chen Huang, Caixia Yin, Chih-Hung Ko, Ching-Kuo Kuo, Chia-Hung Hsu, Gene-Hsiang Lee, Kuan-Yi Ho, Chia-Hsin Wang, Yaw-Wen Yang, I-Chia Chen, Shie-Ming Peng, Chun-hsien Chen

Affiliation

¹ Department of Chemistry and Center for Emerging Material and Advanced Devices, National Taiwan University, Taipei 10617 (Taiwan), Fax: (+886) 2-33666359.

PMID: 24677325
DOI: 10.1002/chem.201400067

Abstract

This study develops the first heteropentametal extended metal atom chain (EMAC) in which a string of nickel cores is incorporated with a diruthenium unit to tune the molecular properties. Spectroscopic, crystallographic, and magnetic characterizations show the formation of a fully delocalized Ru2(5+) unit. This [Ru2]-containing EMAC exhibits single-molecule conductance four-fold superior to that of the pentanickel complex and results in features of negative differential resistance (NDR), which are unobserved in analogues of pentanickel and pentaruthenium EMACs. A plausible mechanism for the NDR behavior is proposed for this diruthenium-modulated EMAC.

Keywords: diruthenium unit; heterometal EMACs; molecular electronics; negative differential resistance; single-molecular conductance.