Gusev, A., Braga, E., Kaleukh, A., Baevsky, M., Kiskin, M., & Linert, W. (2024). Multistimuli Luminescence and Anthelmintic Activity of Zn(II) Complexes Based on 1H-Benzimidazole-2-yl Hydrazone Ligands. Inorganics, 12(9), Article 256. https://doi.org/10.3390/inorganics12090256
Three novel Zn(II) mononuclear complexes with the general formula ZnL₂Cl₂ (L = 2-(4-R-phenylmethylene)benzimidazol-2-hydrazines; R-H (1), R-CH₃ (2), and R-OCH₃ (3)) were synthesized and fully characterized by various means. These complexes demonstrate excitation-dependent emission, which is detected by a change in the emission color (from blue to green) upon an increase in the excitation wavelength. Moreover complex 1 shows reversible mechanochromic luminescence behavior due to the reversible loss of solvated methanol molecules upon the intense grinding of crystals. In addition, 1 exhibits vapochromic properties, which originate from the adsorption methanol vapor on the crystal surface. The strengthening of anthelmintic activity at the transition from free hydrazones to zinc-based complexes is shown.
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