有机自旋磁性材料，尤以刺激响应型磁性可控材料近期受到广泛关注。当前研究还是主要限于有机小分子范围。且受限于磁性中心在光、热、氧化还原等刺激作用下的稳定性，导致自旋磁性转变的可控性下降。本项目中，我们以含氮氧稳定自由基和光或氧化还原响应性基团为前体或单体，运用合理的加成或缩合偶联聚合得到含多个自旋中心的本征磁性高分子。利用吩噻嗪、吩噁嗪等可在温和的电荷转移条件下形成稳定阳离子自由基结构以及特定的不饱和键作为高分子氧化还原或光响应单元，并优化出合适的刺激条件来解决在控制高分子磁性转变时稳定性的问题。通过调节响应基团的共轭种类、长度及与自旋中心的邻、间、对分子构型变化和诱导产生的空间构象改变，来实现高分子上多个磁性中心（重复单元之内、之间）的电子自旋多重度或磁性偶合状态转变（高低自旋态和铁磁反铁磁转变），深入揭示从结构多维转变到自旋磁性转变的内在关系机理，以达到高分子材料真正的自旋磁性可控目的。

Organic spin-magnetic materials, especially stimuli responsive materials with magnetic controllable properties have received wide attentions and possess huge potential applications. Nowadays, these research concerned are limited mainly in small organic molecules and metal-organic compositions. Due to the low chemical stability of spin centers upon light、thermo and redox stimuli factors, the control of spin-magnetic transition decreased. In this project, nitroxide radicals and light or redox sensitive units will be used as precursors or monomers to synthesize entire magnetic polymers in a proper way. During the spin magnetic transition, phenothiazine or phenoxazin which could convert to stable cation radicals under mild redox situations and some specific unsaturated bonds would be utilized as stimuli response units to solve the problem of spin stability in polymers, through an optimized switching condition. By regulating the type、length or para-/meta-/ortho- positons between conjugated bridges with spin centers and the configuration change upon external stimuli, the transitions of spin multiplicity and magnetic interaction (high / low spin state or ferro / antiferro-magnetic coupling) will be achieved among the multi-spin centers in polymer chains (inter or intra repetitive units). The inner relationships or mechanisms between the multi-dimensional structure change and the transitions of spin magnetism would be discovered, in order to target the polymer possessed real spin-magnetic controllable property. In addition, our research would further provide structures and theoretical support for the acquirements of entire ferro / antiferro-magnetic polymers with high value of saturation susceptibility.