Author
H. Meider
Bio: H. Meider is an academic researcher. The author has an hindex of 1, co-authored 1 publications receiving 60 citations.
Papers
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60 citations
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TL;DR: In this paper, a summary of the coordination chemistry of homoleptic thioether macrocycles is presented, with emphasis on likely future developments and uses, and some unpublished results are discussed.
Abstract: Publisher Summary This chapter presents a summary that discusses the coordination chemistry of homoleptic thioether macrocycles critically, with emphasis on likely future developments and uses. Some unpublished results, mainly crystallographic data from laboratories, are discussed in this chapter. The coordination chemistry of thioether ligands has undergone a renaissance over the past five years. This has been because of the observation that cyclic thioethers can bind to a range of transition metal ions to form stable metal complexes. The properties of the M-S(thioether) bond can now be studied with a variety of metal centers, oxidation states, and coordination geometries. Another impetus for the study of the coordination chemistry of crown thioethers stems from the role of thioether binding in biological systems, such as d-biotin (involving tetrahydrothiophene), and blue copper proteins, such as plastocyanin and azurin (involving methionine). The high-yield syntheses of macrocyclic polyoxoethers are characterized by the strong template effects that arise from oxygen coordination by alkali metal ions during cyclization of polyoxo units. The parallel between the binding of soft transition metal ions by soft cyclic thioether ligands and the binding of hard main-group metal ions (Group IA and IIA) by hard cyclic oxyether ligands is presented.
280 citations
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TL;DR: In this paper, the synthesis, structural, and coordination chemistry of crown thioethers with both transition and p-block metal ions is reviewed comprehensively through December 1988, focusing on the electronic structures and redox properties induced in metal ions by coordination to crown thiosethers.
Abstract: The synthetic, structural, and coordination chemistry of crown thioethers with both transition and p-block metal ions is reviewed comprehensively through December 1988. Emphasis falls upon the electronic structures and redox properties induced in metal ions by coordination to crown thioethers. Examples include stabilization of mononuclear Rh(II), Pt(III), and low-spin octahedral Co(II). A subsidiary theme concerns the influence of ligand conformation in determining both the binding efficacy and the qualitative coordination chemistry associated with a given crown thioether. The review concludes with a view toward potential future applications of crown thioethers in catalysis, in sequestration or biological delivery of heavy metal ions, and in fundamental studies directed toward rational design of ligands.
205 citations
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TL;DR: GO/Fe-Mn greatly reduced the bioavailability of mercury to wheat and rice, even promoted the seedling growth, and suggests that GO/Fe/Mn can be used as an effective and environmental-friendly adsorbent in heavy metal remediation.
132 citations
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TL;DR: The intense interaction between mesoporous CuO NPs and porous g-C3N4 confirms the durability of the CuO/g-C 3N4 heterostructures during recyclability for five times.
94 citations
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TL;DR: In this paper, it was shown that dibenzo-18-crown-6 (DB18C6) had a larger affinity to potassium than other alkali metals.
Abstract: Natural macrocvclic compounds, such as valinomycin, are attractive to analysts who have interest in the high selectivity of potassium ion as compared to sodium ion. This selectivity in alkali metal ions was not found in other ligands. Pedersen synthesized many crown ethers [1] and published his result that dibenzo-18-crown-6 (DB18C6) had a larger affinity to potassium than other alkali metals. Since then, these ligands and related compounds have held great interest for physical, inorganic and biochemists.
94 citations