Conjugated polymers usually require strategies to expand the range of wavelengths absorbed and increase solubility. Developing effective strategies to enhance both properties remains challenging. Herein, we report syntheses of conjugated polymers based on a family of metalla-aromatic building blocks via a polymerization method involving consecutive carbyne shuttling processes. The involvement of metal d orbitals in aromatic systems efficiently reduces band gaps and enriches the electron transition pathways of the chromogenic repeat unit. These enable metalla-aromatic conjugated polymers to exhibit broad and strong ultraviolet-visible (UV-Vis) absorption bands. Bulky ligands on the metal suppress π-π stacking of polymer chains and thus increase solubility. These conjugated polymers show robust stability toward light, heat, water, and air. Kinetic studies using NMR experiments and UV-Vis spectroscopy, coupled with the isolation of well-defined model oligomers, revealed the polymerization mechanism.

中文翻译：

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基于金属芳族结构单元的共轭聚合物。

共轭聚合物通常需要扩大吸收波长范围和增加溶解度的策略。制定有效的策略来增强这两个属性仍然具有挑战性。在此，我们报告了基于一系列金属芳族结构单元的共轭聚合物的合成，该方法通过涉及连续卡宾穿梭过程的聚合方法。芳族系统中金属 d 轨道的参与有效地减少了带隙并丰富了显色重复单元的电子跃迁途径。这些使金属-芳族共轭聚合物能够表现出宽而强的紫外-可见 (UV-Vis) 吸收带。金属上的大体积配体抑制聚合物链的 π-π 堆积，从而增加溶解度。这些共轭聚合物对光、热、水和空气表现出强大的稳定性。