Читать книгу First virtual Bilateral Conference on Functional Materials (BiC-FM) - Сборник статей, Андрей Владимрович Быстров, Анна Владимировна Климович - Страница 14

Sachin Kochrekar,^1,2 Ajit Kalekar,² Shweta Mehta,^3,4 Pia Damlin,² Mikko Salomäki,² Sari Granroth,⁵ Niko Meltola,⁶ Kavita Joshi,^3,4Carita Kvarnström²

¹Turku University Graduate School (UTUGS) Doctoral Programme in Physical and Chemical Sciences, FI-20014 Turku, Finland

²Turku University Centre for Materials and Surfaces (MatSurf), Department of Chemistry, University of Turku, Vatselankatu 2, FI-20014 Turku, Finland.

³Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008 India.

⁴Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-200112, UP, India.

⁵Laboratory of Materials Science, University of Turku, FI-20014, Turku, Finland.

⁶ArcDia International Oy Ltd, Lemminkäisenkatu 32, FI-20521-Turku, Finland.

carkva@utu.fi

This study reports the electropolymerization of novel keto functionalized octaethyl metal porphyrins (Zn⁺² and Ni⁺²) in presence of 4,4 bipyridine (4,4´ BPy) as bridging nucleophile on FTO surface. The polymer films were characterized by electrochemical, spectroscopic (UV–Vis, XPS, FT-IR and Raman spectroscopy) and microscopic (AFM and SEM) techniques. The absorption and electronic spectra establish the binding of monomer units in the polymer film, retaining most of the spectroscopic properties of the monomer with slight shift and peak broadening. The surface morphology reveals heterogeneous polymerization. Through computational studies, we aim to get insight into the effect of metal center (Zn⁺² and Ni⁺²) and presence of the keto group on the porphyrin unit. The first 4,4´ BPy prefers meso position next to β-keto group in ZnOEPK whereas it prefers opposite meso position in NiOEPK further leading to linear and branched orientation with the introduction of second 4,4´ BPy, respectively. The interaction between the polymer films in the absence and presence of CO₂ suggests a similar mechanism for both the polymers. The role of the 4,4´ BPy in the polymer unit in association with the activity with CO₂ is emphasized.

Acknowledgement. The authors acknowledge the Magnus Ehrnrooth foundation and Business Finland for financial support.

Carita Kvarnström

Professor of Materials Chemistry

Department of Chemistry

University of Turku

Finland

1996 PhD, Åbo Akademi University, Åbo-Turku Finland

1996–2008 Assistant and Associate Professor, Åbo Akademi University, Åbo-Turku Finland

2009- Full Professor in Materials Chemistry University of Turku, Finland

2010–2014 Director for Turku University Centre for Materials and Surfaces

2017–2016 Head of Laboratory of Materials and Chemical Analysis

2017–2019 Head of Department

Honors or Awards

1996 The Alftan prize for meritorious thesis published awarded by The Finnish Chemists Society

1996 The Elvings prize for the best thesis published at the Åbo Akademi University

1997 Representative for Finland at Scientia Europea 2. Organized by Académie des Sciences (French Academy of Sciences) France.

2006 The Pehr Brahe prize for meritorious research work awarded by the Foundation of Åbo Akademi University.

2020 Member of Finnish Academy of Science and Letters

Research Interests

Conjugated polymers, composite materials, graphene and graphene oxide, ionic liquids, CO₂ conversion, in situ spectroelectrochemistry, electrochemistry

Publications; 137 peer reviewed international scientific journals, 3 patent applications