کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1443287 1509462 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
3D structure and spin-gap transition observed in a new Ni(mnt)2-based molecular solid containing substituted 4-dimethylaminopyridinium
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
3D structure and spin-gap transition observed in a new Ni(mnt)2-based molecular solid containing substituted 4-dimethylaminopyridinium
چکیده انگلیسی

A new molecular solid [FClBzPyN(CH3)2][Ni(mnt)2](1) ([FClBzPyN(CH3)2] = [1-(4′-fluoro-2′-chlorobenzyl)-4-dimethylaminopyridinium], mnt = maleonitriledithiolate), has been prepared and characterized by single crystal X-ray diffraction and magnetic measurements. The Ni(III) ions of 1 form a quasi-one-dimensional zigzag magnetic chain within a Ni(mnt)2− column through Ni···S, Ni···Ni, or π···π interactions with Ni···Ni distances of 3.953 and 3.990 Å. The Cl···S short interactions and weak hydrogen bonds between anions and cations in the crystal generate a 3D network structure. Magnetic susceptibility measurements in the temperature range 1.8–300 K show that 1 exhibits a spin-gap transition around 55 K, and antiferromagnetic interaction (θ = −50.8 K) in the high-temperature phase (HT) and spin gap (Δ/kb = 132.6 K) in the low-temperature phase (LT).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 158, Issues 8–9, June 2008, Pages 379–382
نویسندگان
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