We report the synthesis, characterization, and electronic properties of the quinoid-based three-dimensional metal-organic framework [Fe(dhbq)]. The MOF was synthesized without using cations as a template, unlike other reported Xdhbq-based coordination polymers, and the crystal structure was determined by using single-crystal X-ray diffraction. The crystal structure was entirely different from the other reported [Fe(Xdhbq)]; three independent 3D polymers were interpenetrated to give the overall structure.
View Article and Find Full Text PDFN,N'-dihydroxy-1,4,5,8-naphthalenetetracarboxdiimide (NDI-(OH) ) has attracted much attention in recent years, because its doubly deprotonated state, (O-NDI-O) , has metal-coordination ability and characteristic electronic transition useful for designing electronic and optical functions. In contrast, a molecular crystal with the mono-deprotonated (HO-NDI-O) ion remains unknown. We herein report an organic crystal containing non-disproportionated (HO-NDI-O) ions, which are connected by very strong O-H-O hydrogen bonds.
View Article and Find Full Text PDFThe first interdigitated MX-type chain complex with infinite π-stacked arrays was synthesized. The synchronization between a Pt-Br⋯ chain and π-stacking periodicities led to the longest M-X-M distance (6.6978(15) Å) and nil or negligible intervalence charge transfer, which is essential to realize the Robin-Day class I mixed valence state in MX chains.
View Article and Find Full Text PDFRedox-active metal-organic frameworks (MOFs) have great potential for use as cathode materials in lithium-ion batteries (LIBs) with large capacities because the organic ligands can undergo multiple-electron redox processes. However, most MOFs are electrical insulators, limiting their application as electrode materials. Here, we report an electron-conductive MOF with a 2,5-dihydroxy-1,4-benzoquinone (dhbq) ligand, Fe(dhbq).
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