Synthesis and Characterization of Tetrahedral Zinc(II) Complexes with 3, 6,7‐Triamino‐7<i>H</i>‐[1, 2,4]triazolo[4, 3‐<i>b</i>][1, 2,4]triazole as Nitrogen‐Rich Ligand

Klapötke, Thomas M.; Schmid, Philipp C.; Stierstorfer, Jörg; Szimhardt, Norbert

doi:10.1002/zaac.201600006

Cited by 10 publications

(6 citation statements)

References 24 publications

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“…. O contacts, as in our case, are rare, yet the FOJTAZ [73] and IJAMEN [74] examples also show the outer sphere ligand formally completing a trigonal bipyramidal environment, as in 6. It must be also stated that the perchlorate anion is firmly hold in that position also thanks to NH .…”

Section: Description Of the Crystal Structure Of [Znl2(cl)](clo4)supporting

confidence: 59%

Pyrene-Containing Polyamines as Fluorescent Receptors for Recognition of PFOA in Aqueous Media

Simonini Steiner,

Romano,

Massai

et al. 2023

Molecules

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The globally widespread perfluorooctanoic acid (PFOA) is a concerning environmental contaminant, with a possible toxic long-term effects on the environment and human health The development of sensible, rapid, and low-cost detection systems is a current change in modern environmental chemistry. In this context, two triamine-based chemosensors, L1 and L2, containing a fluorescent pyrene unit, and their Zn(II) complexes are proposed as fluorescent probes for the detection of PFOA in aqueous media. Binding studies carried out by means of fluorescence and NMR titrations highlight that protonated forms of the receptors can interact with the carboxylate group of PFOA, thanks to salt bridge formation with the ammonium groups of the aliphatic chain. This interaction induces a decrease in the fluorescence emission of pyrene at neutral and slightly acidic pH values. Similarly, emission quenching has also been observed upon coordination of PFOA by the Zn(II) complexes of the receptors. These results evidence that simple polyamine-based molecular receptors can be employed for the optical recognition of harmful pollutant molecules, such as PFOA, in aqueous media.

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Section: Description Of the Crystal Structure Of [Znl2(cl)](clo4)supporting

confidence: 59%

Pyrene-Containing Polyamines as Fluorescent Receptors for Recognition of PFOA in Aqueous Media

Simonini Steiner,

Romano,

Massai

et al. 2023

Molecules

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“…To satisfy these requirements, substantial number of nitrogen‐rich compounds were synthesized due to their high densities and heats of formation, which principally attributed to the presence of abundant N–N bonds and C–N bonds as well as the extensive hydrogen bonds. Most of them exhibited excellent properties and therefore shown expansive application prospect in multiple fields as expected ,…”

Section: Introductionmentioning

confidence: 71%

Two Energetic Salts based on 5,5′-Bitetrazole-1,1′-diolate: Syntheses, Characterization, and Properties

Yang

Zhang

2017

Z. Anorg. Allg. Chem.

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Two salts based on 1H,1′H‐5,5′‐bitetrazole‐1,1′‐diolate (BTO) anion with pyrazole (1) and imidazole (2) cations were synthesized with metathesis reactions. Structural characterization was accomplished for them by using the element analysis, Fourier transform infrared spectroscopy (FT‐IR), NMR and mass spectrum, and X‐ray single crystal diffraction. Thermal analysis for the title salts were determined by means of differential scanning calorimetry (DSC) and thermogravimetry‐derivative thermogravimetry (TG‐DTG) as well as the calculation of non‐isothermal kinetic parameters. Consequently, both salts shown acceptable thermal stabilities as the decomposition temperatures were over 200 °C. The enthalpies of formation were calculated for these salts using the measured combustion energies with a result of 70.6 kJ·mol–1 for 1 and –47.8 kJ·mol–1 for 2, respectively. Impact and friction sensitivities were also tested and the results indicated that these salts both have low sensitivities (>40 J, 120 N). The title energetic salts possess acceptable performance, they can therefore be applied in the field of energetic materials.

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“…Metal complexes bearing triazole ligands are also considered one of the most biologically active materials. These complexes can be utilized in various agricultural and pharmaceutical applications because their activity can be easily tuned by varying metals, ancillary ligands, and coordination geometries. − Particularly, zinc (Zn) complexes have been extensively investigated due to their chemical stability and physiological merits. − Zinc ions exist in many chemical and biological systems as Zn 2+ species with a d 10 configuration, making them difficult to either oxidize or reduce. Since Zn 2+ ions can act as Lewis acids, they have a strong tendency to form stable adducts with triazole ligands.…”

Section: Introductionmentioning

confidence: 99%

“… 12 − 14 Particularly, zinc (Zn) complexes have been extensively investigated due to their chemical stability and physiological merits. 15 − 20 Zinc ions exist in many chemical and biological systems as Zn 2+ species with a d 10 configuration, making them difficult to either oxidize or reduce. Since Zn 2+ ions can act as Lewis acids, they have a strong tendency to form stable adducts with triazole ligands.…”

Section: Introductionmentioning

confidence: 99%

Triazole-Bridged Zinc Dinuclear Complexes: Mechanochemical Synthesis, Crystal Structure, and Biological Activity

et al. 2022

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Two zinc (Zn) complexes, [Zn2(DAT)2Cl4] (I) and [Zn2(DAT)2(NO3)4] (II), were prepared by grinding 3,5-diamino-1,2,4-triazole (C2H5N5, DAT) with Zn precursors such as ZnCl2 and Zn(NO3)2, respectively. This solid-state reaction gives the corresponding Zn complex as the sole product in over 99% yield. This mechanochemical method promotes the selective formation of Zn complexes different from those obtained using the conventional solution-based route. The crystal structures of the two complexes were analyzed by single-crystal X-ray diffraction. Complex (I) crystallizes in the monoclinic space group P21/c, whereas complex (II) crystallizes in the triclinic space group P 1̅. Each complex is characterized by the presence of a characteristic DAT-bridged dimer with one DAT ligand per Zn atom, and the DAT ligand provides a bridge between the two Zn metals. All Zn centers of (I) and (II) adopted a slightly distorted tetrahedral geometry. Both complexes contain a hexanuclear Zn2N4 ring, but their ring structures are different. Complex (I) possesses a boat geometry, while complex (II) has a nearly planar structure. The Zn-bound chlorides of complex (I) form intermolecular N–H···Cl hydrogen bonds that link neighboring molecules. In complex (II), the O atoms in the nitrate groups are hydrogen-bonded to the DAT ligand via O···H–N linkages. Both complexes exhibit blue emissions in the solid state at ambient temperature. They were evaluated as anticancer agents in HeLa, NCCIT, and MCF-7 cancer cell lines, exhibiting promising anticancer activities.

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Synthesis and Characterization of Tetrahedral Zinc(II) Complexes with 3, 6,7‐Triamino‐7H‐[1, 2,4]triazolo[4, 3‐b][1, 2,4]triazole as Nitrogen‐Rich Ligand

Abstract: O (4). The zinc species were prepared in a straightforward and inexpensive synthesis. The complexes 2-4 were structurally characterized using X-ray diffraction. Additionally, the

Cited by 10 publications

References 24 publications

Pyrene-Containing Polyamines as Fluorescent Receptors for Recognition of PFOA in Aqueous Media

Pyrene-Containing Polyamines as Fluorescent Receptors for Recognition of PFOA in Aqueous Media

Two Energetic Salts based on 5,5′-Bitetrazole-1,1′-diolate: Syntheses, Characterization, and Properties

Triazole-Bridged Zinc Dinuclear Complexes: Mechanochemical Synthesis, Crystal Structure, and Biological Activity

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