In:
Zeitschrift für anorganische und allgemeine Chemie, Wiley, Vol. 641, No. 11 ( 2015-09), p. 1874-1880
Abstract:
In order to explore the influences of (de‐)protonation of the imidazole ring on the structural diversity of the resulting complexes, the imidazole‐based ligands 4, 5‐diphenylimidazole (Hdpi) and 1 H ‐phenanthro[9, 10‐ d ]imidazole (Hpi) were utilized as bulky building blocks to construct four complexes by solvothermal reactions, i.e. [Ag(Hdpi) 2 ](NO 3 ) · (H 2 O) ( 1 ), [Cu(dpi)] ∞ ( 2 ), [Cu(Hpi)(NO 3 )] ∞ ( 3 ), and [(H 2 pi)(NO 3 )] · H 2 O ( 4 ). In complex 1 , two Hdpi ligands adopt a monodentate pattern and coordinate with one Ag I ion to form a mononuclear unit, which is further connected by hydrogen bonds into a 1D supramolecular helix. The deprotonated dpi ligand of 2 acts in bidentate mode, and bridges Cu I ions to afford a 1D chain. In 3 , the NO 3 – ion, acts as a monodentate bridging ligand and joins Cu I ions to generate a 1D chain. The Hpi ligand employs a monodentate mode to bond with Cu I ions of the 1D chain. 4 is protonated and two H 2 pi nitrogen atoms are free of coordination. Interestingly, hydrogen bonds among the NO 3 – ion, the H 2 pi ligand, and the water molecule yield a macro ring R 4 4 (14). The resulting structural diversity reveals that the (de‐)protonation of imidazole ring directly steers the coordination number of ligand, and thus causes a significant effect on the structure, especially the dimensionality. Furthermore, the solid‐state fluorescence properties of the free ligands and compounds 1 – 4 were studied at room temperature.
Type of Medium:
Online Resource
ISSN:
0044-2313
,
1521-3749
DOI:
10.1002/zaac.v641.11
DOI:
10.1002/zaac.201500230
Language:
English
Publisher:
Wiley
Publication Date:
2015
detail.hit.zdb_id:
201094-X
detail.hit.zdb_id:
1481139-X
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