Under solvothermal conditions, a robust Pb²⁺-based coordination polymer (CP), [Pb(TDC)]_n (1), where H₂TDC is thiophenedicarboxylic acid, has been achieved. Structural analysis reveals that 1 crystallizes in the monoclinic space group C2/c, where the Pb²⁺ ions show quadrangular prism coordination geometry. CP 1 represents a 3D coordination network based on a TDC²⁻ ligand as bridges and quadrangular prismatic PbO₈ units as nodes, among which the PbO₈ units are extended through edge-sharing to form a 2D layer in the bc plane. Interestingly, CP 1 emitted intense and long-lived orange phosphorescence in the solid state at room temperature, with a quantum yield of 6.7% and a phosphorescence lifetime of 1.78 ms. A fine structure is clearly observed in the phosphorescence emission spectra at temperatures below 55 K. The emission mainly arose from the electron transition within the π-type orbitals of the TDC²⁻ ligand. This study gives a fresh impetus to achieve CP-based long-lived phosphorescent materials under ambient conditions.

中文翻译：

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分别在环境条件下和在约200 ℃下观察到磷光发射和精细结构。55 K在铅（ii）-噻吩二甲酸铅的配位聚合物中†

在溶剂热条件下，已经获得了一种坚固的基于Pb ²⁺的配位聚合物（CP）[Pb（TDC）] _n（1），其中H ₂ TDC是噻吩二甲酸。结构分析表明1在单斜空间群C 2 / c中结晶，其中Pb ²⁺离子显示四边形棱柱配位几何。CP 1表示基于TDC ^2-配体作为桥和四边形棱柱形PbO ₈单元作为节点的3D协调网络，其中PbO ₈单元通过边缘共享扩展以在bc中形成2D层飞机。有趣的是，CP 1在室温下以固态发出强烈且长寿命的橙色磷光，其量子产率为6.7％，磷光寿命为1.78 ms。在低于55 K的温度下，在磷光发射光谱中清楚地观察到精细的结构。发射主要来自TDC ^2-配体的π型轨道内的电子跃迁。这项研究为在环境条件下获得基于CP的长寿命磷光材料提供了新的动力。