Jinan. A. Azouz and Wathiq. S. Abdul-Hassan 2025. Synthesis, characterization, and redox-responsive novel molecular switching behavior of copper (II)–Viologen adduct complexes. Applied Chemical Engineering. 8, 3 (Sep. 2025), ACE-5751. DOI:https://doi.org/10.59429/ace.v8i3.5751.