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pH-dependent structural diversity of 2-pyridinemethanol Cu complex and its relatively strong magnetic exchange coupling via hydrogen bonding

Abstract

The diversity of the self-assembled structures of a Cu complex via hydrogen bonding, including a square planar unit, is reported. The Cu complex forms two self-assembled structures by hydrogen bonding, depending on the acidity of the recrystallization conditions. A linear chain structure can be produced in acidic conditions, and a three-dimensional network structure is observed in basic conditions. The linear chain structure is constructed from intermolecular sharing of a hydrogen atom between two 2-pyridinemethanolate units, with an O…O distance of 2.412(1) Å and an O–H–O bond angle of 170(3)º. The linear chain structure exhibits relatively strong magnetic coupling (J = −9.91(2) cm−1) via hydrogen bonding between Cu atoms; this coupling was also confirmed by electron spin resonance experiments. Thermochromic behavior was also observed for the complex.

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Publication details

The article was received on 27 Feb 2017, accepted on 28 Mar 2017 and first published on 28 Mar 2017


Article type: Paper
DOI: 10.1039/C7DT00718C
Citation: Dalton Trans., 2017, Accepted Manuscript
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    pH-dependent structural diversity of 2-pyridinemethanol Cu complex and its relatively strong magnetic exchange coupling via hydrogen bonding

    T. Hamaguchi, T. Nagata, S. Hayami, S. Kawata and I. Ando, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT00718C

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