Nature of nonexponential loss of correlation above the glass transition investigated by multidimensional NMR

Physical Review Letters, Vol. 66, No. 23. (10 June 1991), 3020.

View FullText article

DOI, PROLA (abstract), PROLA (pdf)

Reviews [Write a review of this article]

There are no reviews of this article

Notes for this article

kedmond has 2 private notes and 0 public notes for this article. If you are kedmond then you can log in to see the private notes.

Find related articles from these CiteULike users

kedmond

Find related articles with these CiteULike tags

glass, molecular, rotation, supercooled

Abstract

A two-dimensional (2D) and a novel ‘‘reduced four-dimensional (4D)’’ exchange NMR experiment are applied to investigate slow dynamics in poly(vinyl acetate) 20 K above its T g . The 2D 13 C NMR spectra indicate a diffusive process with strongly nonexponential loss of correlation. In the ‘‘reduced 4D’’ experiment; the underlying distribution of correlation times is found to be heterogeneous on the time scale of the average correlation time; becoming homogeneous; however; at later times due to fluctuations which are 2 orders of magnitude slower.

@article{citeulike:1369155, abstract = {A two-dimensional (2D) and a novel ‘‘reduced four-dimensional (4D)’’ exchange NMR experiment are applied to investigate slow dynamics in poly(vinyl acetate) 20 K above its T g . The 2D 13 C NMR spectra indicate a diffusive process with strongly nonexponential loss of correlation. In the ‘‘reduced 4D’’ experiment; the underlying distribution of correlation times is found to be heterogeneous on the time scale of the average correlation time; becoming homogeneous; however; at later times due to fluctuations which are 2 orders of magnitude slower.}, author = {Schmidt-Rohr, K. and Spiess, H. W. }, citeulike-article-id = {1369155}, doi = {10.1103/PhysRevLett.66.3020}, journal = {Physical Review Letters}, keywords = {glass, molecular, rotation, supercooled}, month = {June}, number = {23}, pages = {3020+}, posted-at = {2007-06-07 00:35:13}, priority = {2}, publisher = {American Physical Society}, title = {Nature of nonexponential loss of correlation above the glass transition investigated by multidimensional NMR}, url = {http://dx.doi.org/10.1103/PhysRevLett.66.3020}, volume = {66}, year = {1991} }

RIS record

TY - JOUR ID - citeulike:1369155 L3 - citeulike-article-id:1369155 TI - Nature of nonexponential loss of correlation above the glass transition investigated by multidimensional NMR JF - Physical Review Letters VL - 66 IS - 23 SP - 3020 PB - American Physical Society N2 - A two-dimensional (2D) and a novel ‘‘reduced four-dimensional (4D)’’ exchange NMR experiment are applied to investigate slow dynamics in poly(vinyl acetate) 20 K above its T g . The 2D 13 C NMR spectra indicate a diffusive process with strongly nonexponential loss of correlation. In the ‘‘reduced 4D’’ experiment; the underlying distribution of correlation times is found to be heterogeneous on the time scale of the average correlation time; becoming homogeneous; however; at later times due to fluctuations which are 2 orders of magnitude slower. KW - glass KW - molecular KW - rotation KW - supercooled AU - Schmidt-Rohr, K AU - Spiess, HW PY - 1991/06/10/ UR - http://dx.doi.org/10.1103/PhysRevLett.66.3020 ER -

RIS BibTeX