Pressure-Induced One-Dimensional Instability in (DMDCNQI)₂Cu

Ferromagnetic and Antiferromagnetic Fluctuations ofπ−dItinerant Electrons Disclosed by Band-Selective NMR

“…The present finding widens the scope to view the metal-to-insulator (M-I) transition appearing under pressure [14][15][16] or with deuteration of the molecule [4]. This M-I transition is beyond the conventional framework of the organics such as charge density wave, SDW, or Mott transitions because of the unconventional features of the insulating state [4,16]; (i) threefold charge ordering, Cu 1 Cu 1 Cu 21 , occurs along the c axis, (ii) the spins on the Cu 21 sites form an antiferromagnetic lattice, and (iii) the DMe-DCNQI sites become nonmagnetic.…”

A pentaammineruthenium mixed-valence complex with 1,4-dicyanamido-2,3,5,6-tetrachlorobenzene dianion as bridging ligand: symmetry-attenuated electronic coupling between redox sites

“…6Aqueous solution, 0.1 M NaCl, glassycarbon working electrode, 25 °C, and 100 mV/s. 'Acetonitrile solution, 0.1 TBAH, platinum working electrode, 25 °C, and 100 mV/s. ''Two overlapping Ru(III/II) couples.…”

“…All spectra are 8.3 x 10~5 M in metal complex. 25 mL of acetone to the filtrate precipitated the bromide salt of the complex. The crude product was filtered out and vacuum dried, yielding 0.39 g. The crude bromide salt was dissolved in a minimum amount of 0.3 M aqueous NaCl and loaded onto a 2.5 X 30 cm Sephadex C25-120 cation-exchange resin column.…”

Scattering and Coxeter groups

“…Furthermore, we wish to mention the recent experiments on (DMe-DCNQI)*Cu by the Japanese group [6-81. It is reported that the molecular conductor exhibits a CDW transition only at ambient pressure [6,7]. By applying appropriate pressures, they found the inverse pressure effect which induces the metal-insulator transition [8]. In particular, they observed the two-step transition process in the resistivity measurement.…”