ElectrochromismElectrochemistryElectrosynthesisReaction MechanismMultifunctional and Chromogenic MaterialsNucleophilic Aromatic Substitution evices, Polyoxometalates, Metal Nanoparticles, Electrorheology anIonic Liquids Room Temperature Ionic LiquidsElectrochromic Materials synthesis of electrochromic materialsPolyoxometalatesMetal NanoparticlesElectrorheology and electrorheological fluids