Related ArticlesSpin Component-Scaled Second-Order Møller-Plesset Perturbation Theory for Calculating NMR Shieldings.
J Chem Theory Comput. 2015 Jan 13;11(1):37-44
Authors: Maurer M, Ochsenfeld C
Abstract
Spin component-scaled and scaled opposite-spin second-order Møller-Plesset perturbation approaches (SCS-MP2 and SOS-MP2) are introduced for calculating NMR chemical shifts in analogy to the well-established scaled approaches for MP2 energies. Gauge-including atomic orbitals (GIAO) are employed throughout this work. The GIAO-SCS-MP2 and GIAO-SOS-MP2 methods typically show superior performance to nonscaled MP2 and are closer to the coupled-cluster singles doubles perturbative triples (CCSD(T))/cc-pVQZ reference values. In addition, the pragmatic use of mixed basis sets for the Hartree-Fock and the correlated part of NMR chemical shift calculations is shown to be beneficial.
[NMR paper] A linear- and sublinear-scaling method for calculating NMR shieldings in atomic orbital-based second-order Mo?ller-Plesset perturbation theory.
A linear- and sublinear-scaling method for calculating NMR shieldings in atomic orbital-based second-order Mo?ller-Plesset perturbation theory.
Related Articles A linear- and sublinear-scaling method for calculating NMR shieldings in atomic orbital-based second-order Mo?ller-Plesset perturbation theory.
J Chem Phys. 2013 May 7;138(17):174104
Authors: Maurer M, Ochsenfeld C
Abstract
An atomic-orbital (AO) based formulation for calculating nuclear magnetic resonance chemical shieldings at the second-order Mo?ller-Plesset perturbation theory...
nmrlearner
Journal club
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05-10-2013 07:03 PM
Journal Highlight: NMR quadrupole liouvillians for arbitrary spin: Exact symbolic expressions and perturbation solutions
Journal Highlight: NMR quadrupole liouvillians for arbitrary spin: Exact symbolic expressions and perturbation solutions
http://www.spectroscopynow.com/common/images/thumbnails/13dc0c363d3.jpgThe NMR of quadrupolar nuclei with half-integer spins, which is described by treating the quadrupole interaction with second-order perturbation theory, has been elaborated on by calculating the transitions directly without the requirement of knowing the operators and wavefunctions.
Read the rest at Spectroscopynow.com
nmrlearner
General
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04-01-2013 04:23 PM
Relaxation theory of nuclear singlet states in two spin-1/2 systems
Relaxation theory of nuclear singlet states in two spin-1/2 systems
Publication year: 2010
Source: Progress in Nuclear Magnetic Resonance Spectroscopy, Volume 56, Issue 3, April 2010, Pages 217-231</br>
Giuseppe*Pileio</br>
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nmrlearner
Journal club
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09-13-2011 09:15 PM
[Question from NMRWiki Q&A forum] calculating power level with stdisp
calculating power level with stdisp
For some reason the shape tool has some sort of glitch that I can't calculate a power level for a wurst 10 ms pulse 180 rotation for a a 522 max gamma ~ for over 3000 Hz, with an option "Analyze adiabatic shape".
It insists it is not an adiabatic shape.
So I tried opening the same file shape tool in XWIN-NMR shape tool and the same problem occured but this time it gave me the Hz covered in maximum gamma when I included the degrees of rotation as well as the time for the pulse. it covers a 3ppm bandwidth etc.
I think I've done this many years...
nmrlearner
News from other NMR forums
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08-11-2011 02:30 PM
[NMR paper] Calculating protein structures from NMR data.
Calculating protein structures from NMR data.
Related Articles Calculating protein structures from NMR data.
Methods Mol Biol. 1997;60:157-94
Authors: Güntert P
nmrlearner
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08-22-2010 03:31 PM
[NMR paper] Calculating protein structures from NMR data.
Calculating protein structures from NMR data.
Related Articles Calculating protein structures from NMR data.
Methods Mol Biol. 1997;60:157-94
Authors: Güntert P
nmrlearner
Journal club
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08-22-2010 03:03 PM
[NMR analysis blog] Basics on Arrayed-NMR Data Analysis (Part III): Extracting and calculating useful NMR
Basics on Arrayed-NMR Data Analysis (Part III): Extracting and calculating useful NMR related molecular information
After the basic introductory posts on arrayed NMR experiments, it’s now time to get some action and see how to extract relevant information from these experiments and calculate useful NMR related parameters such as diffusion, relaxation times, kinetics constants, etc.
Actually, in this post I will cover the first case, that is, the analysis of PFG experiments to calculate diffusion coefficients. The reason for this is twofold: (1) I have a nice PFG data set whilst the...