کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1811860 1025602 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic and structural properties of monoradicals and diradicals based on thienyl-substituted nitronyl nitroxide
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Magnetic and structural properties of monoradicals and diradicals based on thienyl-substituted nitronyl nitroxide
چکیده انگلیسی

Magnetic properties of monoradicals and diradicals based on thienyl-substituted nitronyl nitroxide (NN) were investigated by measuring temperature and magnetic-field dependences of magnetization. The magnetic behavior of the monoradical 3-benzo[b]thienyl NN (3-BTHNN) is interpreted in terms of the quasi-2D ferromagnetic Heisenberg model with the coupling constant J/k=+0.16 K and J′/k=+0.02 K, while the alternating antiferromagnetic (AFM) intermolecular interactions are observed in the monoradicals, 2- and 3-thienyl NN (2- and 3-THNN). In contrast, the magnetic behavior of the diradicals, 2,3- and 2,5-bis(NN)thiophene (2,3- and 2,5-THBNN), is explained by quite strong AFM intramolecular interactions between the two spin centers, each located on the two NN moieties. We discuss here the origin of the magnetic interactions observed in these radicals by considering their molecular and crystal structures determined by the X-ray diffraction techniques.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 405, Issue 11, Supplement, 1 June 2010, Pages S327–S330
نویسندگان
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