未掺杂聚乙炔中质子的自旋晶格弛豫——局域化的孤子

波谱学杂志 ›› 1984, Vol. 1 ›› Issue (5): 467-475.

未掺杂聚乙炔中质子的自旋晶格弛豫——局域化的孤子

吴肖令

华东师范大学

收稿日期:1984-06-05 修回日期:1984-08-21 出版日期:1984-09-05 发布日期:2018-01-25

THE PROTON SPIN-LATTICE RELAXATION IN UNDOPED POLYACETYLENE——LOCALIZED SOLITONS

Wu xiaoling

East-China Normal University

Received:1984-06-05 Revised:1984-08-21 Online:1984-09-05 Published:2018-01-25

摘要/Abstract

摘要： 测量了未掺杂的顺式聚乙炔(cis-polyacetylene)、反式聚乙炔(trans-polyacetylene)和部分氘代的反式聚乙炔样品的质子自旋晶格驰豫时间T₁,测量了反式聚乙炔的旋转座标系中的质子自旋晶格弛豫时间T_1ρ。结果表明,反式聚乙炔中确实存在大量被称为孤子(Soliton)的自旋中心,它们是质子弛豫的支配因素。孤子是可动的,但又是局域化的。用局域化的孤子模型,不仅说明了T_1ρ过程的多指数型衰减,也解释了它的衰减速率不随温度和自旋锁定场强度而变化的特点。

Abstract: The proton spin-lattice relaxation time T₁ in undoped cis-polyacetylene, trans-polyacetylene and partially deuterated trans-polyacetylene, and the proton spin-lattice relaxation time in rotating frame T_1ρ in undoped trans polyacetylene were measured.
The results indicate that trans-polyacetylene does contain a lot of spin centers called solitons, which dominate the proton relaxation in it.Solitons are mobile,but localized. Not only the multiexponential decay in T_1ρ -process,but also the independence of its decay rate from the temperature and the magnitude of the spin-locking magnetic field are interpreted by using the model of localized solitons.

吴肖令. 未掺杂聚乙炔中质子的自旋晶格弛豫——局域化的孤子[J]. 波谱学杂志, 1984, 1(5): 467-475.

Wu xiaoling. THE PROTON SPIN-LATTICE RELAXATION IN UNDOPED POLYACETYLENE——LOCALIZED SOLITONS[J]. Chinese Journal of Magnetic Resonance, 1984, 1(5): 467-475.