Measurement of Aluminum-Carbon Distances Using S-RESPDOR NMR Experiments

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	Measurement of Aluminum-Carbon Distances Using S-RESPDOR NMR Experiments
	Pourpoint, Frederique 1; Trebosc, Julien 1; Gauvin, Regis M.1; Wang, Qiang 2; Lafon, Olivier 1; Deng, Feng 2; Amoureux, Jean-Paul 1
刊名	CHEMPHYSCHEM
	2012-11-12
卷号	13 期号:16 页码:3605-3615
关键词	aluminum carbon internuclear distance NMR spectroscopy organometallic compounds
英文摘要	It is demonstrated that reliable aluminumcarbon distances can be measured in samples with C-13 natural abundance by NMR spectroscopy. Overcoupled resonators, with only one radio-frequency synthesizer and one amplifier, are used to irradiate in the same pulse sequence Al-27 and C-13 nuclei, which differ by only 3.6?% in Larmor frequencies. The combination of Al-27 saturation pulse with heteronuclear dipolar recoupling yields dipolar dephasing of the C-13 signal, which only depends on the Al-C distance and the efficiency of the saturation pulse. Therefore, reliable distances can be obtained by rapid fitting of experimental data to an analytical expression. It is demonstrated that with natural isotopic abundance this approach allows recovery of Al-C distances of 216 pm for the covalent bond in lithium tetraalkyl aluminates, commonly used as a co-catalyst in olefin polymerization processes, and which range from 274 to 381 pm for the three carbon atoms in aluminum lactate. The accuracy of the measured internuclear distances is carefully estimated.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
研究领域[WOS]	Chemistry ; Physics
关键词[WOS]	SOLID-STATE NMR ; ECHO DOUBLE-RESONANCE ; ANGLE-SPINNING NMR ; INTEGER QUADRUPOLAR NUCLEI ; C-13-AL-27 DIPOLAR INTERACTIONS ; ROTATIONAL-ECHO ; CRYSTAL-STRUCTURES ; ADIABATIC-PASSAGE ; MAS NMR ; SPIN-1/2
收录类别	SCI
语种	英语
WOS记录号	WOS:000310602600006
公开日期	2015-07-14
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/1590]
专题	武汉物理与数学研究所_磁共振应用研究部
作者单位	1.Univ Lille N France, UCCS, CNRS 8181, F-59652 Villeneuve Dascq, France 2.Chinese Acad Sci, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Ctr Magnet Resonance, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Pourpoint, Frederique,Trebosc, Julien,Gauvin, Regis M.,et al. Measurement of Aluminum-Carbon Distances Using S-RESPDOR NMR Experiments[J]. CHEMPHYSCHEM,2012,13(16):3605-3615.
APA	Pourpoint, Frederique.,Trebosc, Julien.,Gauvin, Regis M..,Wang, Qiang.,Lafon, Olivier.,...&Amoureux, Jean-Paul.(2012).Measurement of Aluminum-Carbon Distances Using S-RESPDOR NMR Experiments.CHEMPHYSCHEM,13(16),3605-3615.
MLA	Pourpoint, Frederique,et al."Measurement of Aluminum-Carbon Distances Using S-RESPDOR NMR Experiments".CHEMPHYSCHEM 13.16(2012):3605-3615.