کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1307310 1499205 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spin-crossover in the complex of iron(II) nitrate with tris(3,5-dimethylpyrazol-1-yl)methane
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Spin-crossover in the complex of iron(II) nitrate with tris(3,5-dimethylpyrazol-1-yl)methane
چکیده انگلیسی

Novel coordination compound [Fe(HC(3,5-Mepz)3)2](NO3)2 is obtained by a reaction of Fe(NO3)2 with tris(3,5-dimethylpyrazol-1-yl)methane. The compound is characterized with magnetic susceptibility method, electronic (diffuse reflection) and IR spectroscopy and powder diffraction. According to temperature dependence μeff(T) the compound possesses spin-crossover 1A1 ⇔ 5T2 with hysteresis (Tc↑ = 231, Tc↓ = 227 K) accompanied by thermochromism (pink ⇔ colorless). A crystal structure of the compound was determined just before (T = 240 K, FeHS–N 2.14–2.18 Å) and after (T = 123 K, FeLS–N 1.97–1.99 Å) spin phase transition.

Novel coordination compound [Fe(HC(3,5-Mepz)3)2](NO3)2 possesses spin-crossover 1A1 ⇔ 5T2 (Tc = 231 K and Tc = 227 K) accompanied by thermochromism (pink colorless), which crystal structure was determined before and after spin phase transition.Figure optionsDownload as PowerPoint slideHighlights
► Novel compound [Fe(HC(3,5-Mepz)3)2](NO3)2 possesses spin-crossover 1A1 ⇔ 5T2.
► Critical temperatures are 231 K (heating) and 227 K (cooling).
► Spin-crossover is accompanied by thermochromism (pink ⇔ colorless).
► Magnetic susceptibility curve shows hysteresis of 4 K.
► Crystal structure from single crystal was determined before and after spin-crossover.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Inorganica Chimica Acta - Volume 382, 15 March 2012, Pages 1–5
نویسندگان
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