Electron spin resonance studies of magnetic soliton defects in polyacetylene
Electron spin resonance studies of magnetic soliton defects in polyacetylene
复制标题
聚乙炔中磁孤子缺陷的电子自旋共振研究
DOI：
10.1063/1.439808
复制
发表时间：
1980
影响因子：
4.4
通讯作者：
A. MacDiarmid
中科院分区：
文献类型：
--
作者：
B. Weinberger;E. Ehrenfreund;A. Pron;A. Heeger;A. MacDiarmid
本文介绍了未掺杂聚乙炔中磁性缺陷的电子自旋共振研究。获得了(Cd)x和(CH)x在2-295K温度范围内的吸收光谱随温度的变化关系。比较了全异构化反式样品和富顺式样品中的磁性缺陷的性质。这些数据与关于反式聚合物中的移动中性磁性缺陷和富顺式聚合物中的静止中性磁性缺陷的描述是一致的。自旋共振线宽是由电子自旋与空间扩展的磁性缺陷包络内的许多核自旋相互作用而产生的未分辨的超精细分裂决定的。根据磁性缺陷的键交替磁畴壁(孤子)模型，讨论了详细线形和线宽的分析结果。
We present electron spin resonance studies of the magnetic defect in undoped polyacetylene. Temperature dependences of the absorption spectra of (CD)x and (CH)x over the range 2–295 K have been obtained. The properties of the magnetic defect in fully isomerized trans samples and in cis‐rich samples are compared. The data are consistent with a description in terms of a mobile neutral magnetic defect in the trans polymer and a stationary one in the cis‐rich polymer. The spin resonance linewidths are determined by unresolved hyperfine splittings resulting from interaction of the electron spin with many nuclear spins within the envelope of the spatially extended magnetic defect. The results of analyses of the detailed line shapes and linewidths are discussed in terms of the bond alternation domain wall (soliton) model of the magnetic defect.