Formation of Strong OH<sub>2</sub>···<sup>-</sup>O<sub>2</sub>C Hydrogen Bonds in a Trinuclear Core-Based Nickel 1,3,5-Benzenetricarboxylate Coordination Polymer
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posted on 2020-04-02, 14:36 authored by Shin-ichiro Noro, Tomoyuki Akutagawa, Takayoshi NakamuraThe nickel 1,3,5-benzenetricarboxylate (1,3,5-btc<sup>3-</sup>) coordination polymer, [Ni<sub>6</sub>(μ-OH<sub>2</sub>)<sub>4</sub>(1,3,5-btc)<sub>4</sub>(H<sub>2</sub>O)<sub>12</sub>]<i><sub>n</sub></i> (<b>1</b>),
has been synthesized using a hydrothermal reaction. Trinuclear nickel cores constructed from the μ-OH<sub>2</sub> and carboxylate bridges are
linked by the 1,3,5-btc<sup>3-</sup> ligands, forming a two-dimensional network. The μ-OH<sub>2</sub> molecules form strong hydrogen bonds with the
free oxygens of the carboxylate groups in the trinuclear clusters. A structural phase transition occurs around 373 K and is categorized
as a second-order phase transition.
