Huang Min-Jie, Hua Shao-An, Fu Ming-Dung, Huang Gin-Chen, Yin Caixia, Ko Chih-Hung, Kuo Ching-Kuo, Hsu Chia-Hung, Lee Gene-Hsiang, Ho Kuan-Yi, Wang Chia-Hsin, Yang Yaw-Wen, Chen I-Chia, Peng Shie-Ming, Chen Chun-hsien
Department of Chemistry and Center for Emerging Material and Advanced Devices, National Taiwan University, Taipei 10617 (Taiwan), Fax: (+886) 2-33666359.
Chemistry. 2014 Apr 14;20(16):4526-31. doi: 10.1002/chem.201400067. Epub 2014 Mar 27.
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.
本研究开发了首个异五金属扩展金属原子链（EMAC），其中一串镍核与一个二钌单元结合以调节分子性质。光谱、晶体学和磁性表征表明形成了完全离域的Ru₂(5⁺)单元。这种含[Ru₂]的EMAC表现出的单分子电导比五镍配合物高四倍，并导致负微分电阻（NDR）特性，这在五镍和五钌EMAC类似物中未观察到。针对这种二钌调制的EMAC，提出了一种合理的NDR行为机制。
