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A New Systematic Construction of Novel Three-Dimensional Spin Crossover Coordination Polymers Based on the [AgI 2(CN)3] Building Unit.

ABSTRACT: New three-dimensional spin crossover (SCO) coordination polymers systematically constructed by the novel building unit [AgI 2(CN)3], FeII(3-Br-5-CH3pyridine)2[AgI 2(CN)3][AgI(CN)2] (1), FeII(3-Br-5-Clpyridine)2[AgI 2(CN)3][AgI(CN)2] (2), and FeII(3,5-Brpyridine)2[AgI 2(CN)3][AgI(CN)2] (3), have been synthesized and characterized. The bismonodentate binuclear [Ag2(CN)3]- and mononuclear [AgI(CN)2]- units and FeII atoms assemble to form a 3D network structure. The structures of 1-3 are crystallographically identical, which made up the triply interpenetration combined with complicated intermolecular interactions including Ag···Ag, Ag···X (pyridine substituents) and π-stacking interactions. Magnetic and differential scanning calorimetry studies were performed for 1-3. These compounds display a similar SCO behavior, while the critical temperatures (T c) are shifted by the substituent effect. Due to the identical structures of 1-3, the order of T c clearly corresponds with the Hammett constant.

SUBMITTER: Kosone T 

PROVIDER: S-EPMC8154166 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature

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A New Systematic Construction of Novel Three-Dimensional Spin Crossover Coordination Polymers Based on the [Ag<sup>I</sup> <sub>2</sub>(CN)<sub>3</sub>] Building Unit.

Kosone Takashi T   Okuda Syogo S   Kawata Masaya M   Arai Shunsuke S   Kosuge Ryota R   Kawasaki Takeshi T  

ACS omega 20210429 18

New three-dimensional spin crossover (SCO) coordination polymers systematically constructed by the novel building unit [Ag<sup>I</sup> <sub>2</sub>(CN)<sub>3</sub>], Fe<sup>II</sup>(3-Br-5-CH<sub>3</sub>pyridine)<sub>2</sub>[Ag<sup>I</sup> <sub>2</sub>(CN)<sub>3</sub>][Ag<sup>I</sup>(CN)<sub>2</sub>] (<b>1</b>), Fe<sup>II</sup>(3-Br-5-Clpyridine)<sub>2</sub>[Ag<sup>I</sup> <sub>2</sub>(CN)<sub>3</sub>][Ag<sup>I</sup>(CN)<sub>2</sub>] (<b>2</b>), and Fe<sup>II</sup>(3,5-Brpyridine)<sub>2</sub>[Ag  ...[more]

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