Synthesis and luminescence properties of novel 4-(N-carbazole methyl) benzoyl hydrazone Schiff bases

Synthesis and luminescence properties of 1,3,4-oxadiazole acetamide derivatives and their rare earth complexes

“…While the fluorescence intensities of complexes RE(NO 3 ) 3 L 4 Á 2H 2 O were worse than that of the complexes RE(NO 3 ) 3 L 1 Á 2H 2 O, this phenomenon was ascribed to the ligand L 4 owning the electron-withdrawing group (ACl) that caused the electron density of the phenyl ring decreasing. The above results showed that the electron-withdrawing groups on the ligands can decrease the fluorescence intensities of their corresponding rare earth complexes, the reasons are that the n-p ⁄ transition of the accepting electron substituent belongs to forbidden transition, the excited state molecules are seldom obtained, and the S 1 -T 1 crossing intersystem occupies the dominant position [20]. On the contrary, the electron-donating groups on the ligands are resulted in increasing of the fluorescence intensities of the target complexes, which is owing to the electron-donating groups can induce electronic rearrangement of the target complexes that it can improve the energy level matchment between the ligands and the central rare earth ions, so that the ligands can absorb light energy and transfer it to rare earth ions efficiently.…”

Cobalt(II) and Manganese(II) Complexes of Novel Schiff Bases, Synthesis, Charcterization, and Thermal, Antimicrobial, Electronic, and Catalytic Features

“…In previous studies various carbazoles containing Schiff bases and their coordination compounds have been synthesized, characterized, and examined for their different features such as luminescence, thermal property [29][30][31][32][33], biological activity [34], and electrochemical and optical behaviour [35][36][37] and for their use as Langmuir-Blodgett film [38].…”

New Tridentate Hydrazone Metal Complexes Derived from 2-Hydroxy-4-Methoxyacetophenone and some Acid Hydrazides: Synthesis, Characterization and Antibacterial Activity Evaluation

“…They form a wide variety of complexes with chemical, structural, biological and industrial importance. Metal complexes of hydrazones have been proven to show potential applications as catalysts (Sadhukhan et al, 2011), luminescent probes (Guo et al, 2011) and fluorescent sensors (Mukherjee et al, 2011). Their complexes with transition metal ions are known to provide useful models for elucidation of the mechanism of enzyme inhibition by hydrazine derivatives and for their pharmacological applications (Dilworth, 1976).…”