کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1334709 979442 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
One-pot synthesis of gold nanoparticles densely coated with nitroxide spins
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
One-pot synthesis of gold nanoparticles densely coated with nitroxide spins
چکیده انگلیسی

We describe a new and simple method for one-pot synthesis of gold nanoparticles of spherical shape densely coated with unpaired electrons. The gold nanoparticles have a narrow size distribution (1.90 ± 0.54 nm) and even coverage of nitroxide spins per particle and are soluble both in non-polar and polar organic solvents. The one-pot synthesis consists of direct grafting of nanoparticles by ligand substitution with an in situ generated bisnitroxide radical-containing thiol nucleophile. The obtained nanoparticles are stabilized by two types of ligands: covalently attached nitroxide radicals and tetraoctylammonium bromide ions pairs weakly bound to the gold surface. The average number of ligands per core was derived from X-ray photoelectron spectroscopy (XPS) as well as from thermogravimetric and bromine concentration analyses. The proposed procedure can be a powerful tool for the preparation of spin-labeled gold nanoparticles soluble in non-polar and polar organic solvents which should be useful for applications in various fields including biochemistry, catalysis and electrochemistry.

We report a simple one-pot synthesis of spin-labeled gold nanoparticles with well defined structure, narrow size distribution (1.90 ± 0.54 nm), soluble both in polar and non-polar solvents.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 46, Issue 1, 9 October 2012, Pages 119–123
نویسندگان
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