Formula weight prediction by internal reference diffusion-ordered NMR spectroscopy (DOSY).
Formula weight prediction by internal reference diffusion-ordered NMR spectroscopy (DOSY).
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DOI:
10.1021/ja810154u
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发表时间:
2009-04-22
影响因子:
15
通讯作者:
Williard PG
中科院分区:
文献类型:
--
作者:
Li D;Kagan G;Hopson R;Williard PG
Formula weight information is important to characterize the composition, aggregation number, and solvation state of reactive intermediates and organometallic complexes. We describe an internal reference correlated DOSY method for calculating the FW of unknown species in different solvents with different concentrations. Examples for both the small molecule (DIPA) and the organometallic complex (aggregate 1) yield excellent correlations. We also found the relative diffusion rate is inversely proportional to the viscosity change of the solution, which is consistent with the theoretical Stokes-Einstein equation. The accuracy of the least square linear prediction r2 and the percentage difference of FW prediction are directly related to the density change; greater accuracy was observed with decreasing density. We also discuss the guidelines and other factors for successful application of this internal reference correlated DOSY method. This practical method can be conveniently modified and applied to the characterization of other unknown molecules or complexes.
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影响因子:
15
作者:
JACKMAN, LM;SCARMOUTZOS, LM;DEBROSSE, CW
通讯作者:
DEBROSSE, CW
DOI:
10.1021/ja01876a032
发表时间:
1939-01-01
期刊:
JOUR AMER CHEM SOC
影响因子:
--
作者:
FRIEDMAN, LEO;CARPENTER, PAUL G.
通讯作者:
CARPENTER, PAUL G.
影响因子:
2.2
作者:
Crutchfield, Christopher A.;Harris, Douglas J.
通讯作者:
Harris, Douglas J.
影响因子:
15
作者:
FRAENKEL, G;MARTIN, KV
通讯作者:
MARTIN, KV
影响因子:
15
作者:
JACKMAN, LM;CIZMECIYAN, D;NICHOLS, MA
通讯作者:
NICHOLS, MA