Nemutlu Begüm, Eker Emre Fatih, Önal Ahmet M, Cansu Ergun Emine Gul, Tanyeli Cihangir
Middle East Technical University, Department of Chemistry, Ankara 06800, Türkiye.
Baskent University, Department of Electrical and Electronics Engineering, Ankara 06790, Türkiye.
ACS Omega. 2025 Jul 3;10(27):29442-29451. doi: 10.1021/acsomega.5c02762. eCollection 2025 Jul 15.
Conjugated polymers bearing TEMPO units are successfully used as catalysts for the selective oxidation of primary alcohols. Moreover, such polymers should exhibit satisfactory capacitive properties for energy storage applications. Herein, a TEMPO-substituted EDOT-SNS-EDOT conjugated unit was electropolymerized, and the resulting polymer film was investigated for its electrochromic, capacitive, and electrocatalytic properties. The donor structure of the monomer facilitated efficient polymerization. The polymer film displayed brownish-pink and blue-gray colors in its neutral and oxidized states, respectively, while its semioxidized states showed brownish and khaki hues. The optical contrast was determined to be 28% at 505 nm, with oxidation and reduction times of 1.20 and 1.38 s, respectively. The areal-specific capacitance of the polymer electrode was calculated as 3.81 mF/cm (0.1 mA/cm), ranking it at a high-mid level compared to other electrodeposited conjugated polymers reported in the literature. The electrocatalytic activity of the polymer film was evaluated using cyclic voltammetry (CV) in the presence of benzyl alcohol. The TEMPO units effectively catalyzed the oxidation of benzyl alcohol to benzaldehyde in the presence of 2,6-lutidine. Notably, the same polymer film was reused for three successive experiments without any loss of electrocatalytic activity. These findings demonstrate that the developed polymer film exhibits promising electrochromic, capacitive, and electrocatalytic properties.
带有TEMPO单元的共轭聚合物已成功用作伯醇选择性氧化的催化剂。此外，这类聚合物在储能应用中应表现出令人满意的电容性能。在此，电聚合了一种TEMPO取代的EDOT-SNS-EDOT共轭单元，并对所得聚合物膜的电致变色、电容和电催化性能进行了研究。单体的供体结构促进了高效聚合。聚合物膜在中性和氧化状态下分别呈现棕粉色和蓝灰色，而其半氧化状态呈现棕色和卡其色。在505 nm处测得的光学对比度为28%，氧化和还原时间分别为1.20和1.38 s。聚合物电极的面积比电容计算为3.81 mF/cm²(0.1 mA/cm²)，与文献中报道的其他电沉积共轭聚合物相比，处于中高水平。在苄醇存在的情况下，使用循环伏安法(CV)评估聚合物膜的电催化活性。在2,6-二甲基吡啶存在的情况下，TEMPO单元有效地催化了苄醇氧化为苯甲醛。值得注意的是，同一聚合物膜可连续重复使用三次，且电催化活性无任何损失。这些发现表明，所开发的聚合物膜具有良好的电致变色、电容和电催化性能。
