Determination of end-to-end distances in oligomers by pulsed EPR

被引：40

作者：

Pfannebecker, V ^{[1
]}

Klos, H ^{[1
]}

Hubrich, M ^{[1
]}

Volkmer, T ^{[1
]}

Heuer, A ^{[1
]}

Wiesner, U ^{[1
]}

Spiess, HW ^{[1
]}

机构：

[1] MAX PLANCK INST POLYMER RES,D-55021 MAINZ,GERMANY

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1996年 / 100卷 / 32期

关键词：

D O I：

10.1021/jp960895v

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Conformations of end-labeled alkanes in a rigid polymer matrix were investigated using the pulsed double electron-electron resonance (DEER) method. To this end, dipolar spectra of a series of aliphatic dicarbonic acids with 8-20 methylene units and chain ends bifunctionalized with nitroxide radicals were recorded in a polystyrene matrix. The biradicals are derived from hindered amine light stabilizers (HALS), used as polymer additives. Analysis of the dipolar spectra allows the determination of the end-to-end distances of the oligomer biradicals. The experiments show that the ''flexible'' alkane chains are almost completely stretched. This observation is consistent with the results of force field calculations.

引用

页码：13428 / 13432

页数：5

共 32 条

[1] TRANSMEMBRANE PROTEIN-STRUCTURE - SPIN LABELING OF BACTERIORHODOPSIN MUTANTS [J].