【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。更多还原

【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 T1p 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 T1p -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.更多还原