摘要：The phenomenon that different molecular packing modes in aggregates result in different optical properties has attracted intense attention,since it can provide useful information to establish the relationship between the micro-and *** this paper,DBTDO-DMAC was designed with 9,10-dihydro-9,9-dimethylacridine(DMAC)as electron ***-DPA and DBTDO-Cz were designed for comparison,which adopted diphenylamine(DPA)with twisted structure and carbazole(Cz)with planar structure as donors,*** expected,two polymorphs(Crystal G and Crystal Y)of DBTDO-DMAC were obtained and exhibited distinct *** G originating from planar conformation exhibited mechanochromism(MC)phenomenon and the emission color changed from green to yellow with a redshift of 35 nm after ***,Crystal Y with folded conformation displayed obvious room-temperature phosphorescence(RTP)with yellow *** single crystal analyses,powder X-ray diffraction and theoretical calculation reveal that the different emissive behaviors are highly related to the molecular conformation and packing *** successful adjustment of molecular conformation provides some guidance in the design of other MC and/or RTP luminogens,broadens the molecule family with the tunable molecular conformation and opens up a new avenue for exploring possible adjustment of molecular packing in aggregates.

摘要：改善聚芴的性能具有重要意义.本文针对2种影响聚芴蓝光发射的作用,设计并合成了以多苯基苯和芴单元以及多苯基苯和咔唑为构筑单元的聚合物.热重分析结果证实,多苯基苯单元的引入可以赋予聚合物良好的热稳定性.另外,多苯基苯单元能够极大地改善聚合物的溶解性,并有效抑制聚合物链间的相互作用,防止固态时聚合物发射光谱的红移.理论计算结果表明,在其最优化构型中,多苯基苯-芴共聚物中共聚单元间二面角为61.1°,较多苯基苯-苯二面角(36.9°)更大,进一步说明多苯基苯单元的引入能够增加高分子链的扭曲程度,减小共轭程度,更加有利于获得蓝光发射,减少激基缔合物的形成.将聚合物作为高分子发光二极管中的发光层,多苯基苯-咔唑共聚物表现出较好的深蓝光发射,其色坐标为(0.19,0.13).结果表明,多苯基苯单元能作为有效的构筑单元应用于深蓝光聚合物的合成.