Chen Xiya, Sun Xiaomeng, Dai Tingting, Wang Hongwei, Zhao Qian, Yang Chunxia, Du Xianchao, Xing Xiaojing, Cheng Xinfeng, Qiu Dongfang
College of Chemistry, Zhengzhou University, No. 100 of Kexue Road, Zhengzhou 450001, China.
College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
Molecules. 2025 Mar 19;30(6):1376. doi: 10.3390/molecules30061376.
An asymmetric two-arm polypyridine ligand 4'-{4-[4-(2,2'-dipyridyl)phenyl]}-2,2':6',2'-terpyridine () with double coordination units was synthesized using the one-step Suzuki reaction. The metallic supramolecular film was subsequently obtained by the Fe-induced self-assembly method at the CHCl-HO interface, which displayed a distinct flat and continuous morphology. The supramolecular film-coated ITO electrode demonstrated a reversible electrochemical redox behavior with pronounced color changes between purple and light green. Its solid-state electrochromic device had an optical contrast (Δ%) of 26.2% at λ = 573 nm with balanced coloring ( = 2.4 s) and bleaching ( = 2.6 s) times and a high current efficiency of 507.8 cm/C. Moreover, good cycling stability with a long-term reversible color change was observed beyond 900 cycles. These results suggested the promising potential of the supramolecular film for electrochromic applications.
采用一步 Suzuki 反应合成了一种具有双配位单元的不对称双臂多吡啶配体 4'-{4-[4-(2,2'-联吡啶基)苯基]}-2,2':6',2'-三联吡啶（）。随后通过 Fe 诱导自组装法在 CHCl-H₂O 界面获得了金属超分子薄膜，该薄膜呈现出明显的平整且连续的形态。超分子薄膜包覆的 ITO 电极表现出可逆的电化学氧化还原行为，在紫色和浅绿色之间有明显的颜色变化。其固态电致变色器件在 λ = 573 nm 处的光学对比度（Δ%）为 26.2%，着色（τcol = 2.4 s）和褪色（τble = 2.6 s）时间平衡，电流效率高达 507.8 cm²/C。此外，在 900 次循环以上观察到具有长期可逆颜色变化的良好循环稳定性。这些结果表明该超分子薄膜在电致变色应用方面具有广阔的潜力。
