Add time:07/17/2019         Source:sciencedirect.com

Five coordination compounds Zn(mbmpbi)2Cl2 (1), Zn(mbmpbi)2Br2 (2), Cd(mbmpbi)2Cl2 (3), Hg(mbmpbi)2Cl2 (4) and Hg(mbmpbi)2Br2 (5) were synthesized by the reaction of 1-(p-methoxybenzyl)-2-(p-methoxyphenyl)benzimidazole (mbmpbi) with the corresponding metal halides. The complexes have been characterized by elemental analysis, conductance measurements, FT-IR, 1H NMR and photoluminescence spectral studies. The ligand mbmpbi exhibits the N-benzimidazole coordination. The structures of 3–5 have been determined by single crystal X-ray diffraction. These three complexes are isostructural, crystallizing in the monoclinic system, P2/n space group with a distorted tetrahedral geometry around the metal ion. Zn(II) and Cd(II) complexes show strong blue emission in solid state at room temperature.

► Newly synthesized and characterized transition metal complexes are very interesting due to bulky nature of the ligand. ► New transition metal complexes have brought out the isostructural features with the metal ion in a distorted tetrahedral environment. ► Zn(II) and Cd(II) complexes show strong blue luminescence with different emission intensities depending on the excitation wavelength.

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