کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5407845 | 1393239 | 2006 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Polarization transfer from para-hydrogen to heteronuclei: Effect of H/D substitution. The case of AAâ²X and A2A2â²X spin systems
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Polarization transfer from para-hydrogen to heteronuclei: Effect of H/D substitution. The case of AAâ²X and A2A2â²X spin systems Polarization transfer from para-hydrogen to heteronuclei: Effect of H/D substitution. The case of AAâ²X and A2A2â²X spin systems](/preview/png/5407845.png)
چکیده انگلیسی
Upon hydrogenation from para-hydrogen (p-H2), hyperpolarization transfer toward a heteronucleus may be possible even if the two protons are chemically equivalent in the final product (but not magnetically equivalent), provided that J couplings with the heteronucleus exist. It is however shown (theoretically and experimentally) that this transfer effectively occurs if the spin system in the hydrogenated molecule is of the type AAâ²X (A and Aâ² denoting the two protons originating from p-H2 and X the heteronucleus) but does not occur for a spin system of the A2A2â²X type. A theory has been worked out for assessing the details of the X spectrum (multiplet patterns) in the case of ALTADENA and PASADENA experiments. Experimental verifications are provided.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetic Resonance - Volume 178, Issue 2, February 2006, Pages 184-192
Journal: Journal of Magnetic Resonance - Volume 178, Issue 2, February 2006, Pages 184-192
نویسندگان
Silvio Aime, Roberto Gobetto, Francesca Reineri, Daniel Canet,