کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1337343 1500252 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Doping ruthenium complexes into a molecular spin-crossover material
ترجمه فارسی عنوان
مجتمع های روتنیم دوپینگ به یک ماده متقاطع پیچ خورده مولکولی
کلمات کلیدی
اهن، روتنیم، لیگاندهای نانوذرات، اسپین متقاطع، اندازه گیری های مغناطیسی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
چکیده انگلیسی

Two ruthenium compounds, [Ru(κ3C,N,C-bip)2][BF4]2 (bip = 2,6-di{1-methylimidazol-2-ylidene-3-yl}pyridine) and [Ru(terpy)(κ3N,N,C-terpy∗)][BF4]2 (terpy = 2,2′:6′,2″-terpyridine and terpy∗ = 2,2′:6′,4″-terpyridine), have been investigated as dopants for the spin-crossover lattice [Fe(bpp)2][BF4]2 (bpp = 2,6-di{pyrazol-1-yl}pyridine). While [Fe(bpp)2][BF4]2 and [Ru(bip)2][BF4]2 did not co-crystallize, five different compositions of solid solutions [Fe(bpp)2]x[Ru(terpy)(terpy∗)]1–x[BF4]2 were prepared, with 0.96 ⩾ x ⩾ 0.13. The materials with intermediate compositions (0.58 ⩾ x ⩾ 0.28) contained a mixture of crystalline and amorphous material by powder diffraction. The spin-crossover midpoint temperature (T½) in [Fe(bpp)2]x[Ru(terpy)(terpy∗)]1–x[BF4]2 decreases smoothly with x, as the larger ruthenium dopant expands the host lattice and stabilizes its high-spin state. That contrasts with our previously published materials [Fe(bpp)2]z[Ru(terpy)2]1–z[BF4]2, which show a more complicated relationship between T½ and their composition.

The fluorescent compounds [Ru(bip)2][BF4]2 (bip = 2,6-di{1-methylimidazol-2-ylidene-3-yl}pyridine) and [Ru(terpy)(terpy∗)][BF4]2 (terpy = 2,2′:6′,2″-terpyridine and terpy∗ = 2′:6′,4″-terpyridine) have been investigated as dopants for the spin-crossover lattice [Fe(bpp)2][BF4]2 (bpp = 2,6-di{pyrazol-1-yl}pyridine). While [Fe(bpp)2][BF4]2 and [Ru(bip)2][BF4]2 did not co-crystallize, five different solid solutions [Fe(bpp)2]x[Ru(terpy)(terpy∗)]1−x[BF4]2 were prepared. The spin-crossover midpoint temperature (T½) in [Fe(bpp)2]x[Ru(terpy)(terpy∗)]1−x[BF4]2 decreases smoothly with x.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 87, 17 February 2015, Pages 91–97
نویسندگان
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