Exploiting the relationship between the stacking modes of molecules and room-temperature phosphorescence (RTP) performance is of great important to design afterglow materials. A series of coordination polymers [Cd(CzIP)] (1) (H₂CzIP = 5-(carbazol-9-yl) isophthalate), [Cd(CzIP)(DMI)] (2) (DMI = 1,3-Dimethyl-2-imidazolidinone) and [Cd₂(CzIP)₂(H₂O)₂] (3) base on carbazole–isophthalic acid are synthesized via a solvothermal method. These compounds exhibit stacking-dependent RTP. Compounds 1 and 2 exhibit obvious time-dependent RTP with the afterglow color from orange to green, and show white-light emission owing to fluorescence and phosphorescence dual emission. Compound 3, which features the strong π‒π stacking, showed the weakest phosphorescence with the shortest lifetime. It reveals that the phosphorescence efficiency is not proportional to the overlap of π-π stacking, the triplet excited states of discrete dimer mode rather than H-aggregation can dominate the generation of room-temperature phosphorescence. These results indicate that coordination induction is an efficient approach to regulate the aggregation of chromophores, further modulating the room-temperature phosphorescence.

利用分子的堆积模式与室温磷光（RTP）性能之间的关系对于设计余辉材料非常重要。一系列配位聚合物 [Cd(CzIP)] (1) (H ₂ CzIP = 5-(咔唑-9-基)间苯二甲酸酯)、[Cd(CzIP)(DMI)] (2) (DMI = 1,3-通过溶剂热法合成了基于咔唑-间苯二甲酸的二甲基-2-咪唑啉酮）和[Cd ₂ (CzIP) ₂ (H ₂ O) _{2 ] (3)} 。这些化合物表现出堆积依赖性 RTP。化合物1和2表现出明显的时间依赖性RTP，余辉颜色从橙色到绿色，并且由于荧光而呈现白光发射和磷光双发射。化合物3具有较强的π-π堆积，显示出最弱的磷光和最短的寿命。结果表明，磷光效率与π-π堆积的重叠不成正比，离散二聚体模式的三重激发态而不是H聚集可以主导室温磷光的产生。这些结果表明，配位诱导是调节发色团聚集的有效方法，进一步调节室温磷光。