A Novel Platinum(III)–Platinum(III) Neutral Dimer Complex, Pt₂(cdtb)₄I₂ (cdtb: 4-Cyanodithiobenzoate)

A Preinstalled Protic Cation as a Switch for Superprotonic Conduction in a Metal–Organic Framework

“…This indicates that the Pt ion is trivalent, as seen in many previous examples. 27,30 The existence of a Pt dimer unit is also reflected in the characteristic vibration modes and the electronic transition and supported by a density functional theory (DFT) calculation (Figures S7−S9 and Tables S1 and S2). Three out of the four carboxyl groups of the MPC ligand in the Pt dimer and the neutral DMA coordinate with a trivalent Co ion, forming a six-coordinated octahedral geometry (Figure S2).…”

“…Focusing on each metal center, we can see that the Pt part has a clear paddlewheel-type dimer structure, where an MPC ligand coordinates with two Pt ions as an in-plane ligand and two chloride ions coordinate to the apical position of each Pt ion (Figure S1). This indicates that the Pt ion is trivalent, as seen in many previous examples. , The existence of a Pt dimer unit is also reflected in the characteristic vibration modes and the electronic transition and supported by a density functional theory (DFT) calculation (Figures S7–S9 and Tables S1 and S2). Three out of the four carboxyl groups of the MPC ligand in the Pt dimer and the neutral DMA coordinate with a trivalent Co ion, forming a six-coordinated octahedral geometry (Figure S2).…”

“…Among the polynuclear metal units, Pt dimer complexes are known not only as building blocks for electrically conductive one-dimensional (1D) coordination polymers but also as key units for unique optical properties in the solid state due to metal–metal interactions. − Many kinds of polynuclear metal complexes have been used for secondary building units (SBUs) of MOFs, − but only a few series of 1D coordination polymers based on a Pt dimer have been achieved. − Notably, there has been no report on Pt dimer based MOFs with 2D and 3D extended structures. In this work, we have designed a novel MOF based on a Pt dimer complex, Pt 2 (HMPC) 4 (H 2 MPC, 6-mercaptopyridine-3-carboxylic acid) shown in Figure a.…”

Synthesis and Magnetic Properties of a Dimerized Trinuclear Ni String Complex, [Ni6Cl2(dpa)8](I5)2·0.25I2 (dpa– = 2,2′-Dipyridylamide Anion)

“…This is the first example of two Ni string complexes that are connected. 1 shows electronic absorption bands and a vibration mode characteristic of a dimer structure . Moreover, in the solid state, dimer string complexes stack with a head-to-tail arrangement and align one-dimensionally in an MMMX­MMMX (M = Ni, X = Cl) manner, leading to intra- and interdimer antiferromagnetic interactions.…”