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A Mixed-Valent Metal-Organic Ladder Linked by Pyrazine.

Ken-Ichi OtakeKazuya OtsuboHiroshi Kitagawa
Published in: Journal of physics. Condensed matter : an Institute of Physics journal (2020)
We report the synthesis, characterization, and electronic state of a novel mixed-valent metal-organic ladder (MOL) linked by pyrazine (pz). Single-crystal X-ray studies revealed that the MOL has a two-legged ladder-shaped framework, which is composed of a pz-connected Pt dimer with bridging Br ions. The electronic state of the MOL was investigated using X-ray and spectroscopic techniques; the MOL was found to have an electronic state that corresponds to the mixed-valence state of PtII and PtIV. Furthermore, the intervalence charge transfer energy of the MOL has lower than that expected from the tendency of a similar halogen-bridged mixed-valence MOL owing to its unique "zig-zag"-shaped legs. These results provide a new insight into the physical and electronic properties of MOL systems.
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