Linking metal-containing clusters with polytopic organic linkers by strong bonds has given rise to many metal-organic frameworks (MOFs), which show permanent porosity and ultra-high gas adsorption capacities. An appealing feature of MOFs is the enormous flexibility with which the composition and connectivity of the metal clusters (termed secondary building units, SBUs) can be varied to construct new desirable structures. So far, the SBUs employed are still largely limited to metal oxide and metal-nitrogen clusters. Given the immense diversity of coordination chemistry of sulfides, very little has been done on the connection of metal sulfide clusters by organic linkers into extended structures. In this research, a new class of MOFs, namely metal organic sulfides (MOSs), is developed by building from metal sulfide clusters instead of the more typical metal oxide SBUs. We herein show that linking Mo3S7 clusters with 1,4-benzenedithiolate (BDT) has led to the discovery of a new material, (NEt4)4[(Mo3S7)2(BDT)3Br6] named MOS-1. Synthesized in crystals, MOS-1 was structurally examined by SXRD and PXRD as one-dimensional chains of Mo3S7 clusters connected by BDT linkers. Employing Mo3S7 clusters as charge storage and transfer units, MOS-1, as a novel cathode material in lithium-ion battery, exhibited high capacity of 465 mAh/g.

Crystallizing one-dimensional metal-organic sulfide as cathode material of lithium-ion battery

253rd National Meeting (2017)

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