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Copolymers of bipyridinium and metal (Zn & Ni) porphyrin derivatives; theoretical insights and electrochemical activity towards CO2.

ABSTRACT: This study reports the electropolymerization of novel keto functionalized octaethyl metal porphyrins (Zn2+ and Ni2+) in the presence of 4,4'-bipyridine (4,4'-bpy) as a bridging nucleophile. The polymer films were characterized by electrochemical, spectroscopic (UV-Vis, XPS, FT-IR and Raman spectroscopy) and imaging (AFM and SEM) techniques. The absorption and electronic spectra confirm the presence of both porphyrin and 4,4'-bipyridine units in the film. The surface morphology reveals homogeneous film deposition with average roughness values of approx. 8 nm. The theoretical studies performed offered insights into the interplay of different metal centres (Zn2+ and Ni2+) and the keto functionality of the porphyrin unit in the formation of copolymer films. The electrochemical interaction of polymer films with CO2 suggests a reversible trap and release of CO2 with low energy barriers for both the polymers.

SUBMITTER: Kochrekar S 

PROVIDER: S-EPMC9033822 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature

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Copolymers of bipyridinium and metal (Zn & Ni) porphyrin derivatives; theoretical insights and electrochemical activity towards CO<sub>2</sub>.

Kochrekar Sachin S   Kalekar Ajit A   Mehta Shweta S   Damlin Pia P   Salomäki Mikko M   Granroth Sari S   Meltola Niko N   Joshi Kavita K   Kvarnström Carita C  

RSC advances 20210501 32

This study reports the electropolymerization of novel keto functionalized octaethyl metal porphyrins (Zn<sup>2+</sup> and Ni<sup>2+</sup>) in the presence of 4,4'-bipyridine (4,4'-bpy) as a bridging nucleophile. The polymer films were characterized by electrochemical, spectroscopic (UV-Vis, XPS, FT-IR and Raman spectroscopy) and imaging (AFM and SEM) techniques. The absorption and electronic spectra confirm the presence of both porphyrin and 4,4'-bipyridine units in the film. The surface morphol  ...[more]

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