Coordination and structural studies of crowned-porphyrins

Zakaria Halime; Mohammed Lachkar; Loic Toupet

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Coordination and structural studies of crowned-porphyrins

机译：冠状卟啉的配位和结构研究

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Simple chelating agents have been synthesized using a porphyrin and a covalently linked crown-ether.Depending on the relative spatial arrangement of both motifs,the resulting ligands,either a macrotricycle or bis-macrocycles,differ one from another by their flexibility or their aptitude to chelate bivalent or trivalent cations.The coordination chemistry as well as the structural study of these ligands and complexes are reported.In the particular case of the macrotricycle,the crown-ether motif,perpendicular to the porphyrin induces a side selectivity for the coordination of lead(II)outside the cavity.Furthermore,the coordination of zinc(II)implies a change of conformation of the ligand in which the crown-ether is parallel to the porphyrin.

机译：使用卟啉和共价连接的冠醚合成了简单的螯合剂。取决于两个基序的相对空间排列，所得配体（大三环或双大环）的柔性或适应性会彼此不同。螯合了二价或三价阳离子。报道了这些配体和配合物的配位化学以及结构研究。在大三环的特殊情况下，垂直于卟啉的冠醚基序诱导了对铅配位的侧选择性此外，锌（II）的配位意味着冠醚与卟啉平行的配体构象变化。

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《Dalton transactions: An international journal of inorganic chemistry》 |2007年第33期|共6页
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Zakaria Halime; Mohammed Lachkar; Loic Toupet;
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Coordination and structural studies of crowned-porphyrins

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