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arXiv · 1402.1279

Molecular Split-Ring Resonators Based on Metal String Complexes

Yao Shen·Hsin-Yu Ko·Qing Ai·Shie-Ming Peng·Bih-Yaw Jin
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Abstract

Metal string complexes or extended metal atom chains (EMACs) belong to a family of molecules that consist of a linear chain of directly bonded metal atoms embraced helically by four multidentate organic ligands. These four organic ligands are usually made up of repeating pyridyl units, single-nitrogen-substituted heterocyclic annulenes, bridged by independent amido groups. Here, in this paper, we show that these heterocyclic annulenes are actually nanoscale molecular split-ring resonators (SRRs) that can exhibit simultaneous negative electric permittivity and magnetic permeability in the UV-Vis region. Moreover, a monolayer of self-assembled EMACs is a periodic array of molecular SRRs which can be considered as a negative refractive index material. In the molecular scale, where the quantum-size effect is significant, we apply the tight-binding method to obtain the frequency-dependent permittivity and permeability of these molecular SRRs with their tensorial properties carefully considered.

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Yao Shen, Hsin-Yu Ko, Qing Ai, Shie-Ming Peng, Bih-Yaw Jin. 2014-02-06. Molecular Split-Ring Resonators Based on Metal String Complexes. https://doi.org/10.1021/jp410619d

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