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- W2066709986 abstract "Four new 1D spin-Peierls-type compounds, [D5]1-(4′-R-benzyl)pyridinium bis(maleonitriledithiolato)nickelate ([D5]R-Py; R=F, I, CH3, and NO2), were synthesized and characterized structurally and magnetically. These 1D compounds are isostructural with the corresponding non-deuterated compounds, 1-(4′-R-benzyl)pyridinium bis(maleonitriledithiolato)nickelate (R-Py; R=F, I, CH3, and NO2). Compounds [D5]R-Py and R-Py (R=F, I, CH3, and NO2) crystallize in the monoclinic space group P21/c with uniform stacks of anions and cations in the high-temperature phase and triclinic space group P with dimerized stacks of anions and cations in the low-temperature phase. Similar to the non-deuterated R-Py compounds, a spin-Peierls-type transition occurs at a critical temperature for each [D5]R-Py compound; the magnetic character of the 1D S=1/2 ferromagnetic chain for [D5]F-Py and the 1D S=1/2 Heisenberg antiferromagnetic chain for others appear above the transition temperature. Spin-gap magnetic behavior was observed for all of these compounds below the transition temperature. In comparison to the corresponding R-Py compound, the cell volume is almost unchanged for [D5]F-Py and shows slight expansion for [D5]R-Py (R=I, CH3, and NO2) as well as an increase in the spin-Peierls-type transition temperature for all of these 1D compounds in the order of F>I≈CH3≈NO2. The large isotopic effect of nonmagnetic countercations on the spin-Peierls-type transition critical temperature, TC, can be attributed to the change in ω0 with isotope substitution." @default.
- W2066709986 created "2016-06-24" @default.
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- W2066709986 date "2013-01-09" @default.
- W2066709986 modified "2023-10-18" @default.
- W2066709986 title "Influence of Isotope Substitution on Lattice and Spin-Peierls-Type Transition Features in One-Dimensional Nickel Bis-dithiolene Spin Systems" @default.
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- W2066709986 doi "https://doi.org/10.1002/asia.201200956" @default.
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