Novel hexanuclear and octanuclear zinc alkyl cages derived from a bis-oxamidate ligand

Rufino‐Felipe, Ernesto; Caballero-Jiménez, Judith; Guerrero-Ramírez, Luis-Guillermo; Flores‐Álamo, Marcos; Muñoz‐Hernández, Miguel‐Ángel

doi:10.1016/j.inoche.2015.12.001

Cited by 12 publications

(6 citation statements)

References 46 publications

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“…All commercially available chemical and solvents were used directly without further purification. The preparation of 2-amino-4,6-di- tert -butylphenol was performed by a method previously published in the literature. , …”

Section: Methodsmentioning

confidence: 99%

“…The preparation of 2amino-4,6-di-tert-butylphenol was performed by a method previously published in the literature. 24,25 Synthesis of H 2 L 1 and HL 2 Ligands. The Schiff-base ligand (E)-2,4-di-tert-butyl-6-((2-hydroxy-3-methoxybenzylidene)amino)phenol, shortened as H 2 L 1 , was generated from a condensation treatment of 2-amino-4,6-di-tert-butylphenol with o-vanillin in an equivalent stoichiometric amount in methanol through a modified procedure that has been described previously (Scheme 1).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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A Trinuclear Zinc Coordination Cluster Exhibiting Fluorescence, Colorimetric Sensitivity, and Recycling of Silver Ion and Detection of Cupric Ion

Wen

Yang

et al. 2020

Inorg. Chem.

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The detection and reusage of transition-metal ions play a crucial role in human health and environmental protection. Recently, various analytical methods and substances have been successfully applied to probe or sense silver ions; however, rare representative examples have been presented regarding the simultaneous detection of silver and silver recycling with the elemental silver powder form. Herein, an unparalleled sensing mechanism for silver ions and recycling silver in its elemental form is exemplified by a fluorescent trinuclear zinc coordination cluster possessing the dual function of colorimetric sensing of silver and responding cupric ions. A Schiff-base-based trinuclear zinc c o o r d i n a t i o n c l u s t e r , 1 , w i t h f o r m u l a Zn 3 (L 1 ) 2 (CH 3 COO) 2 (H 2 O) 2 , has been successfully synthesized by the initial exploration of multidentate ligand H 2 L 1 -((E)-2,4-di-tert-butyl-6-((2-hydroxy-3-methoxybenzy-lidene)amino)phenol) with various metal ions under self-assembly reactions. Complex 1 is highly fluorescent in solution and as a solid, in addition to acting as a fluorescence sensor toward Ag I in ethanol media. Compound 1 displays distinctive sensing of Ag I through the fluorescence quenching effect at 576 nm and signal augment at 446 nm over 11 kinds of cations in the absence of interference. The proposed sensing mechanism is attributed to the ligands in 1 which interact with Ag I ; the ligands undergo oxidation cyclization reaction, leading to the formation of 2 with the formula Zn 3 (L 2 ) 4 (CH 3 COO) 2 •2CH 3 CH 2 OH•H 2 O, and Ag I reduction to elemental Ag powder. Compound 1 presents specific selectivity and sensitivity for Ag I in ethanolic solution with a detection limit of 0.1722 μM. The orange color of 1 changes to colorless during the mixing of a small amount of Ag I , revealing its potential practical application in naked-eye detection of Ag I . Furthermore, 2 exhibits obvious fluorescence emission at 448 nm (λ ex = 380 nm) and selectively responds to Cu II over 11 kinds of metal ions with the fluorescence "turn-off" owing to the formation of 3 in ethanolic solution; it also has a detection limit of 0.0226 μM.

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Section: Methodsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

A Trinuclear Zinc Coordination Cluster Exhibiting Fluorescence, Colorimetric Sensitivity, and Recycling of Silver Ion and Detection of Cupric Ion

Wen

Yang

et al. 2020

Inorg. Chem.

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“…The alcoholic fragment makes a contribution as well, being situated very close to CO 2 molecules [O-C-O···H-O- and HO···O-C-O at 2.11(6) and 2.63(3) Å, respectively]. Despite the supposed flexibility and structural adaptability that serine residues could offer, no important differences in the alcoholic chain conformations have been observed in the CO 2 @1 adsorbate with respect to 1, where only Zn-O ser [ranging from 1.935(3) to 2.191(4) Å] distances show a slight contraction with respect to 1, while Zn-O water [1.992(4) Å], and Zn-N bond lengths [1.959(4) Å] fall in the range of the expected values for Zn(II) metal ions [ 47 ].…”

Section: Resultsmentioning

confidence: 99%

Photodegradation of Brilliant Green Dye by a Zinc bioMOF and Crystallographic Visualization of Resulting CO2

et al. 2021

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We present a novel bio-friendly water-stable Zn-based MOF (1), derived from the natural amino acid L-serine, which was able to efficiently photodegrade water solutions of brilliant green dye in only 120 min. The total degradation was followed by UV-Vis spectroscopy and further confirmed by single-crystal X-ray crystallography, revealing the presence of CO2 within its channels. Reusability studies further demonstrate the structural and performance robustness of 1.

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“…The oxamidate derived from the title oxamide has been used extensively for coordination chemistry. It is possible to find one report in the literature for zinc clusters with 1,2-bis-(3,5di-tert-butyl-2-hydroxyphenyl)oxamidate (Rufino-Felipe et al, 2016). In these complexes, the crystal structures exhibit an octanuclear Zn 8 cage and a hexanuclear Zn 6 cage, where the nuclearity of the cages is driven by the solvent.…”

Section: Database Surveymentioning

confidence: 99%

Crystal structure oftrans-N,N′-bis(3,5-di-tert-butyl-2-hydroxyphenyl)oxamide methanol monosolvate

et al. 2016

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Novel hexanuclear and octanuclear zinc alkyl cages derived from a bis-oxamidate ligand

Cited by 12 publications

References 46 publications

A Trinuclear Zinc Coordination Cluster Exhibiting Fluorescence, Colorimetric Sensitivity, and Recycling of Silver Ion and Detection of Cupric Ion

A Trinuclear Zinc Coordination Cluster Exhibiting Fluorescence, Colorimetric Sensitivity, and Recycling of Silver Ion and Detection of Cupric Ion

Photodegradation of Brilliant Green Dye by a Zinc bioMOF and Crystallographic Visualization of Resulting CO2

Crystal structure oftrans-N,N′-bis(3,5-di-tert-butyl-2-hydroxyphenyl)oxamide methanol monosolvate

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