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Zhang K, Qian H, Zhang L, et al. Influence of the pendant arm, halide, and solvent on high-efficient-tuning [1 + 1] and [2 + 2] schiff-base macrocyclic complexes via a zinc-ion template. Inorg Chem. 2014;54(2):675-81doi: 10.1021/ic502642q.
Zhang, K., Qian, H., Zhang, L., & Huang, W. (2015). Influence of the pendant arm, halide, and solvent on high-efficient-tuning [1 + 1] and [2 + 2] schiff-base macrocyclic complexes via a zinc-ion template. Inorganic chemistry, 54(2), 675-81. https://doi.org/10.1021/ic502642q
Zhang, Kun, et al. "Influence of the pendant arm, halide, and solvent on high-efficient-tuning [1 + 1] and [2 + 2] schiff-base macrocyclic complexes via a zinc-ion template." Inorganic chemistry vol. 54,2 (2015): 675-81. doi: https://doi.org/10.1021/ic502642q
Zhang K, Qian H, Zhang L, Huang W. Influence of the pendant arm, halide, and solvent on high-efficient-tuning [1 + 1] and [2 + 2] schiff-base macrocyclic complexes via a zinc-ion template. Inorg Chem. 2015 Jan 20;54(2):675-81. doi: 10.1021/ic502642q. Epub 2014 Dec 23. PMID: 25535804.
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Inorg Chem. 2015 Jan 20;54(2):675-81. doi: 10.1021/ic502642q. Epub 2014 Dec 23.

Influence of the pendant arm, halide, and solvent on high-efficient-tuning [1 + 1] and [2 + 2] schiff-base macrocyclic complexes via a zinc-ion template.

Inorganic chemistry

Kun Zhang, Huifen Qian, Lei Zhang, Wei Huang

Affiliations

  1. State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing, Jiangsu Province 210093, P. R. China.

PMID: 25535804 DOI: 10.1021/ic502642q

Abstract

A series of pendant-armed Schiff-base macrocyclic complexes 1-7 have been prepared by the condensation between extended dialdehydes with pendant arms (H2hpdd/H2pdd) and 1,3-propanediamine in the presence of ZnX2 (X = Cl, Br, I), where 18-membered [1 + 1] mononuclear and 36-membered [2 + 2] half-fold trinuclear macrocyclic zinc(II) complexes are yielded. Three experimental variables, i.e., the pendant arm, halide, and solvent, are found to influence the organization of final macrocyclic complexes, in addition to the conventional metal-ion template effect promoting reversible formation and cleavage of Schiff-base imine bonds. It is noted that all of the reactions produce singular macrocyclic complexes in high yields if the experimental variables are fixed, and the selection of different pendant arms and halide counterions will generate different [1 + 1] mononuclear and [2 + 2] trinuclear macrocyclic zinc(II) complexes. More interestingly, [1 + 1] and [2 + 2] macrocyclic zinc(II) complexes 2 and 3 can be produced in methanol and ethanol, respectively, in the case of the reaction between ZnBr2, H2pdd, and 1,3-propanediamine. Further experiments reveal that red solid 2 and yellow-green solid 3 can be transformed to each other just by altering the type of solvent, and this tuning is complete and reversible.

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