T₂ distribution spectra obtained by continuum fitting method using a mixed Gaussian and exponential kernel function

TY - JOUR

T1 - T2 distribution spectra obtained by continuum fitting method using a mixed Gaussian and exponential kernel function

AU - Zhu, Haijin

AU - Huinink, Hendrik P.

AU - Magusin, Pieter C.M.M.

AU - Adan, Olaf C.G.

AU - Kopinga, Klaas

N1 - Funding Information: This research forms part of the research programme of the Dutch Polymer Institute (DPI), Project #713. Haijin Zhu wishes to acknowledge the financial support from the Australian Research Council (ARC) through the Australian Laureate Fellowship Scheme. Dr. ir. Sebastiaan J.F. Erich and Dr. Viktor Baukh are acknowledged for helpful discussions.

PY - 2013

Y1 - 2013

N2 - Static 1H NMR Free Induction Decay (FID) signals of polymer solids contain a lot of information about the molecular dynamics. A T 2 analysis of the FID has generally been performed in terms of discrete two- or three-component models. However, this requires a priori assumption of the number of proton species before analysis. This paper presents a method of analyzing the FIDs of the polymer solid samples in terms of a continuous T2 distribution. A mixed Gaussian and Exponential kernel function was used to represent the true characteristic of FIDs of the polymer solids. A simple and realistic assumption has been made to reduce the number of degrees of freedom in the continuum fitting and to make the fitting stable. An experimental static 1H NMR FID of a typical polymer solid sample was analyzed as an example in the end to demonstrate the application of this method.

AB - Static 1H NMR Free Induction Decay (FID) signals of polymer solids contain a lot of information about the molecular dynamics. A T 2 analysis of the FID has generally been performed in terms of discrete two- or three-component models. However, this requires a priori assumption of the number of proton species before analysis. This paper presents a method of analyzing the FIDs of the polymer solid samples in terms of a continuous T2 distribution. A mixed Gaussian and Exponential kernel function was used to represent the true characteristic of FIDs of the polymer solids. A simple and realistic assumption has been made to reduce the number of degrees of freedom in the continuum fitting and to make the fitting stable. An experimental static 1H NMR FID of a typical polymer solid sample was analyzed as an example in the end to demonstrate the application of this method.

KW - Continuum fitting

KW - NMR T spectra

UR - http://www.scopus.com/inward/record.url?scp=84883199972&partnerID=8YFLogxK

U2 - 10.1016/j.jmr.2013.08.002

DO - 10.1016/j.jmr.2013.08.002

M3 - 文章

AN - SCOPUS:84883199972

SN - 1090-7807

VL - 235

SP - 109

EP - 114

JO - Journal of Magnetic Resonance

JF - Journal of Magnetic Resonance

ER -