Poly(ionic liquid)s having coumarate counter-anions as corrosion inhibitors in acrylic UV coatings

New poly(ionic liquid) based on poly(diallyl dimethylammonium) and coumarate that can act as a corrosion inhibitor into an acrylic UV-cured formulation

Synthesis and Photovoltaic Applications of a 4,4′-Spirobi[cyclopenta[2,1‑<i>b</i>;3,4‑<i>b</i>′]dithiophene]-Bridged Donor/Acceptor Dye

A new donor/acceptor (D–A) spiro dye (<b>SCPDT1</b>) featuring two bithiophene units, connected through an sp³-hybridized carbon atom, was prepared by a multistep synthetic sequence involving the convenient assembly of the spiro system under mild catalytic conditions. The photocurrent spectrum of dye-sensitized solar cells incorporating <b>SCPDT1</b> covers the spectral region ranging from 350 to 700 nm and reaches a wide maximum of ∼80% in the 420–560 nm range. Power conversion efficiencies of up to 6.02% were obtained

Natural Deep Eutectic Solvents Based on Choline Chloride and Phenolic Compounds as Efficient Bioadhesives and Corrosion Protectors

Natural deep eutectics solvents (NADES), owing to their high solvation capacity and nontoxicity, are actively being sought for many technological applications. Herein, we report a series of novel NADES based on choline chloride and plant-derived polyphenols. Most of the obtained phenolic NADES have a wide liquid range and high thermal stability above 150 °C. Among them, small-sized polyphenols, like pyrogallol, vanillyl alcohol, or gentisic acid, lead to low-viscosity liquids with ionic conductivities in the order of 10–3 S cm–1 at room temperature. Interestingly, polyphenols possess valuable properties as therapeutic agents, antioxidants, adhesives, or redox-active compounds, among others. Thus, we evaluated the potential of these novel NADES for two applications: bioadhesives and corrosion protection. The mixture of choline chloride-vanillyl alcohol (2:3 mol ratio) and gelatin resulted in a highly adhesive viscoelastic liquid (adhesive stress ≈ 135 kPa), affording shear thinning behavior. Furthermore, choline chloride-tannic acid (20:1) showed an extraordinary ability to coordinate iron ions, reaching excellent corrosion inhibitive efficiencies in mild steel protection