High-Strength, Self-Healing Copolymers of Acrylamide and Acrylic Acid with Co(II), Ni(II), and Cu(II) Complexes of 4′-Phenyl-2,2′:6′,2″-terpyridine: Preparation, Structure, Properties, and Autonomous and pH-Triggered Healing

Polymers, Journal Year: 2024, Volume and Issue: 16(22), P. 3127 - 3127

Published: Nov. 9, 2024

The utilization of self-healing polymers is a promising way solving problems associated with the wear and tear polymer products, such as those caused by mechanical stress or environmental factors. In this study, series novel self-healing, high-strength copolymers acrylamide, acrylic acid, complexes 4′-phenyl-2,2′:6′,2″-terpyridine [Co(II), Ni(II), Cu(II)] was prepared. A systematic study composition properties obtained carried out using variety physicochemical techniques (elemental analysis, gel permeation chromatography (GPC), attenuated total reflectance Fourier transform infrared spectroscopy (ATR/FT-IR), ultraviolet-visible (UV-vis), small-angle X-ray scattering (SAXS), wide-angle (WAXS), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), dynamic (DMA), confocal laser microscopy (CLSM), tensile testing). All metallopolymer samples exhibit autonomous intrinsic healing along maintaining high strength values (for some samples, initial exceeded 100 MPa). best efficiency are possessed metallopolymers nickel complex (up to 83%), which most likely due highest lability metal–heteroatom coordination bonds. example system shows ability re-heal negligible deterioration properties. possibility tuning films through use different metal ions has been demonstrated.

Language: Английский

Fluorescent Polymers via Coordination of bis-Terpyridine Ligands with Transition Metals and Their pH Response Properties

Polymers, Journal Year: 2024, Volume and Issue: 17(1), P. 87 - 87

Published: Dec. 31, 2024

Stimulus-responsive luminescent materials are pivotal in the field of sensing. Fluorescent transition metal complexes with a charge transfer excited state, especially terpyridine-coordinated polymers, particular interest due to their tunable emission. In this paper, novel bis-terpyridine ligand was synthesized and assembled into coordination polymer, which showed intense visible light absorption fluorescence emission solid state that could be regulated by an acidic or basic pH. After being protonated acid, polymer P2 quenched. The split from 635 nm two peaks 674 440 nm, then stabilized at 728 for 7 days, significant red-shift good protonation stability. wavelength polymers recovered after alkalization, intensity greatly improved showing interesting acid–base-response luminescence characteristics. sensitive response acids bases will contribute expanding application linear sensing other fields.

Language: Английский