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  Solid-state NMR structure characterization of a 13CO-labelled Ir(I) complex with a P,N-donor ligand including ultrafast MAS methods.

Tregubov, A. A., Linser, R., Vuong, K. Q., Rawal, A., Gehman, J. D., & Messerle, B. A. (2014). Solid-state NMR structure characterization of a 13CO-labelled Ir(I) complex with a P,N-donor ligand including ultrafast MAS methods. Inorganic Chemistry, 53(14), 7146-7153. doi:10.1021/ic500128y.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-DC26-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-CB32-F
Genre: Journal Article

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Tregubov, A. A., Author
Linser, R.1, Author              
Vuong, K. Q., Author
Rawal, A., Author
Gehman, J. D., Author
Messerle, B. A., Author
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1Research Group of Solid-State NMR-2, MPI for Biophysical Chemistry, Max Planck Society, ou_1950286              

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 Abstract: The structural characterization of a 13CO-labeled Ir(I) complex bearing an P,N-donor ligand (1-[2-(diphenylphosphino)ethyl]pyrazole), [Ir(PyP)(13CO)Cl] is demonstrated using a series of tailored solid-state NMR techniques based on ultrafast (60 kHz) Magic Angle Spinning (MAS), which facilitates correlations with narrow proton line-widths. Our 1D 1H MAS and 2D 13C and 31P CP-MAS NMR spectra provided structural information similar to that obtained using NMR spectroscopy in solution. We employed high-resolution 2D solid-state correlation spectroscopy (1H–13C HETCOR, 1H–31P correlation) to characterize the networks of dipolar couplings between protons and carbon/phosphorus. 1H–1H SQ–SQ correlation spectra showed the dipolar contacts between all protons in a similar fashion to its solution counterpart, NOESY. The use of the 1H single quantum/double quantum experiments made it possible to observe the dipolar-coupling contacts between immediately adjacent protons. Additionally, internuclear 13CO–31P distance measurements were performed using REDOR. The combination of all of these techniques made it possible to obtain comprehensive structural information on the molecule [Ir(PyP)(13CO)Cl] in the solid state, which is in excellent agreement with the single crystal X-ray structure of the complex, and demonstrates the enormous value of ultrafast MAS NMR techniques for a broad range of future applications.

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Language(s): eng - English
 Dates: 2014-07-032014
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1021/ic500128y
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Title: Inorganic Chemistry
Source Genre: Journal
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Pages: - Volume / Issue: 53 (14) Sequence Number: - Start / End Page: 7146 - 7153 Identifier: -