A way to synthesize a Mn²⁺‐ coordinated polymer precursor ligated by sulfur atoms with acetate counter ions (Mn‐DTOGA) is proposed, which is achieved by an imine formation reaction between dithiooxamide and glutaraldehyde in the presence of manganese (II) acetate. MnS/MnO decorated N, S‐doped carbon nanoparticles (MnS/O‐SNC) are then prepared by calcination of the Mn ion‐coordinated polymer for the practical applications of catalytic reactions. The Mn‐DTOGA and MnS/O‐SNC structures prepared at different temperatures (700, 800, and 900 °C) are characterized using various physical and electrochemical and chemical analyses. The nanoparticles prepared at 900 °C reveal the best performance for the catalytic oxidation of Hydrogen peroxide (H₂O₂) and bisphenol A. The decomposition potentials of H₂O₂ (1.0 mm) and bisphenol A (100.0 µm) on the catalyst modified electrode are observed to be +0.40 and +0.15 V (versus Ag/AgCl), respectively. It is observed that the catalytic performances to the oxidation reactions are mainly related to MnO decorated outside the SNC particles compared to MnS formed inside the particles. The electrode reveals a wide dynamic range with the low detection limits for H₂O₂ (0.08 (±0.02) µm) and bisphenol A (0.17 (±0.04) µm). This study will provide essential clues for the future catalyst design.

A monomer precursor of polyterthiphene derivative bearing both electron donor (-NH ₂ ) and acceptor (–COOH) groups (3-([2,2′:5′,2″-terthiophen]-3′-yl)-5-aminobenzoic acid, TABA) was newly synthesized and characterized. The comparison analysis was performed forpTABA with a single acceptor or donor group bearing polymer. The frontier orbital calculation for the monomer reveals the intermolecular electron movement from donor to acceptor through the backbone. The electrical study confirmed that the conductivity of the functionalized polymer increased from 0.11 S cm ⁻¹ (with single donor group) to 0.24 S cm ⁻¹ (with single acceptor group) through 0.19 S cm ⁻¹ (for both donor and acceptor groups), as a result of stabilization of quinoid form on the polymer backbone. Derivative cyclic voltabsorptometry (DCVA) obtained for pTABA confirmed the formation of neutral, polaron, and bipolaron at 470 nm (at +1.07/+0.80 V), 781 nm (at +1.07/+0.80 V), and 950 nm (at +1.30/+1.19 V), respectively. The absorption bands of radical species were blue-shifted by the donor group functionalized polymer and red-shifted by the acceptor group. The electrochromic performance of polymer bearing both donor and acceptor groups achieved nine colors between orange (0.0 V) and midnightblue (1.4 V) compared with that of single functional groups displaying two or three colors.