کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5406684 | 1393184 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Atomic hydrogen as high-precision field standard for high-field EPR
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
We introduce atomic hydrogen trapped in an octaisobutylsilsesquioxane nanocage (H@iBuT8) as a new molecular high-precision magnetic field standard for high-field EPR spectroscopy of organic radicals and other systems with signals around g = 2. Its solid-state EPR spectrum consists of two 0.2 mT wide lines separated by about 51 mT and centered at g â 2. The isotropic g factor is 2.00294(3) and essentially temperature independent. The isotropic 1H hyperfine coupling constant is 1416.8(2) MHz below 70 K and decreases slightly with increasing temperature to 1413.7(1) MHz at room temperature. The spectrum of the standard does not overlap with those of most organic radicals, and it can be easily prepared and is stable at room temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetic Resonance - Volume 207, Issue 1, November 2010, Pages 158-163
Journal: Journal of Magnetic Resonance - Volume 207, Issue 1, November 2010, Pages 158-163
نویسندگان
Stefan Stoll, Andrew Ozarowski, R. David Britt, Alexander Angerhofer,