Three‐Dimensional Solvent‐Vapor Map Generated by Supramolecular Metal‐Complex Entrapment

A highly methanol‐selective vapochromic response has been realized in a NiII‐quinonoid complex, [Ni(HLMe)2] (H2LMe=4‐methylamino‐6‐methyliminio‐3‐oxocyclohexa‐1,4‐dien‐1‐olate) which exhibits a reversible structural transformation including a coordination geometrical change between the square‐planar and octahedral structure by the selective uptake of methanol vapor. This was accompanied by a remarkable color change between purple and orange, as well as temperature‐robust spin‐state switching in the solid state under ambient conditions. It is remarkable that the properties are derived by the fine structural modification of the quinonoid ligand such as methyl or ethyl analogues. Such a system has high potential for applications in memory devices as well as chemical sensors and smart responsive materials.

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Methanol‐Triggered Vapochromism Coupled with Solid‐State Spin Switching in a Nickel(II)‐Quinonoid Complex

Kar

Yoshida

Shigeta

et al. 2017

Angewandte Chemie

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Methanol‐Triggered Vapochromism Coupled with Solid‐State Spin Switching in a Nickel(II)‐Quinonoid Complex

et al. 2017

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A highly methanol-selective vapochromic response has been realized in a Ni -quinonoid complex, [Ni(HL ) ] (H L =4-methylamino-6-methyliminio-3-oxocyclohexa-1,4-dien-1-olate) which exhibits a reversible structural transformation including a coordination geometrical change between the square-planar and octahedral structure by the selective uptake of methanol vapor. This was accompanied by a remarkable color change between purple and orange, as well as temperature-robust spin-state switching in the solid state under ambient conditions. It is remarkable that the properties are derived by the fine structural modification of the quinonoid ligand such as methyl or ethyl analogues. Such a system has high potential for applications in memory devices as well as chemical sensors and smart responsive materials.

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Hetero‐Tetranuclear Cu²⁺/Ca²⁺/Ca²⁺/Cu²⁺ Architectures Based On Malten Ligand: Scaffold for Anion Binding

et al. 2020

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The hetero‐tetranuclear Cu2+/Ca2+/Ca2+/Cu2+ complex obtained with the N,N’‐bis((3‐hydroxy‐4‐pyron‐2‐yl)methyl)‐N,N’‐dimethylethylendiamine (Malten) ligand has been studied in solid and solution states as scaffold to bind anions. Three crystal structures showing the same metal ions sequence have been examined; they display a tetracharged complex cation neutralized by four monocharged anions. The anions play two different roles: as coordinated (two ClO4−, Cl− or NO3−) or ancillary (two ClO4−) guests. The tetranuclear scaffold hosts two anions also in aqueous and ethanol solutions. Spectrophotometric studies in ethanol allowed to determine the addition constant values for Cl− and Br− (Log K1‐2=4.43(4), 4.39(3) for Cl−, 3.80(3), 3.54(2) for Br−) while the others, although bound, showed lower affinity for the scaffold. Both the crystals and the solutions change their color depending on the added anion, namely pink, dark green or blue in the presence of ClO4−, Cl− or NO3−, respectively, thus the presence of the different anions is visible to the naked eye. The hetero‐tetranuclear Cu2+/Ca2+/Ca2+/Cu2+ complex is a versatile architecture to be used as scaffold for anion binding.

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Three‐Dimensional Solvent‐Vapor Map Generated by Supramolecular Metal‐Complex Entrapment

Cited by 4 publications

References 51 publications

Methanol‐Triggered Vapochromism Coupled with Solid‐State Spin Switching in a Nickel(II)‐Quinonoid Complex

Methanol‐Triggered Vapochromism Coupled with Solid‐State Spin Switching in a Nickel(II)‐Quinonoid Complex

Methanol‐Triggered Vapochromism Coupled with Solid‐State Spin Switching in a Nickel(II)‐Quinonoid Complex

Hetero‐Tetranuclear Cu²⁺/Ca²⁺/Ca²⁺/Cu²⁺ Architectures Based On Malten Ligand: Scaffold for Anion Binding

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Three‐Dimensional Solvent‐Vapor Map Generated by Supramolecular Metal‐Complex Entrapment

Cited by 4 publications

References 51 publications

Methanol‐Triggered Vapochromism Coupled with Solid‐State Spin Switching in a Nickel(II)‐Quinonoid Complex

Methanol‐Triggered Vapochromism Coupled with Solid‐State Spin Switching in a Nickel(II)‐Quinonoid Complex

Methanol‐Triggered Vapochromism Coupled with Solid‐State Spin Switching in a Nickel(II)‐Quinonoid Complex

Hetero‐Tetranuclear Cu2+/Ca2+/Ca2+/Cu2+ Architectures Based On Malten Ligand: Scaffold for Anion Binding

Contact Info

Product

Resources

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Hetero‐Tetranuclear Cu²⁺/Ca²⁺/Ca²⁺/Cu²⁺ Architectures Based On Malten Ligand: Scaffold for Anion Binding