51124-76-6Relevant academic research and scientific papers
Unprecedented coordination-induced bright red emission from group 12 metal-bound triarylazoimidazoles
Astafiev, Artyom A.,Gonchar, Maria R.,Khrustalev, Victor N.,Kritchenkov, Andreii S.,Nadtochenko, Victor N.,Nazarov, Alexey A.,Nenajdenko, Valentine G.,Repina, Olga V.,Tskhovrebov, Alexander G.,Tupertsev, Boris S.,Vologzhanina, Anna V.
, (2021)
Arylazoimidazoles are important dyes which were intensively studied in the past. In contrast, triarylazoimidazoles (derivatives which carry aryl substituents at the imidazole core) received almost no attention in the scientific literature. Here, we report a new family of simple and easily accessible triarylazoimidazole-group 12 metal complexes, which feature highly efficient photo-luminescence emission (Φ up to 0.44). Novel compounds exhibit bright red emission in solution, which could be excited with a visible light.
Azoimidazole gold(III) complexes: Synthesis, structural characterization and self-assembly in the solid state
Tskhovrebov, Alexander G.,Novikov, Alexander S.,Tupertsev, Boris S.,Nazarov, Alexey A.,Antonets, Anastasia A.,Astafiev, Artyom A.,Kritchenkov, Andreii S.,Kubasov, Alexey S.,Nenajdenko, Valentine G.,Khrustalev, Victor N.
, (2021)
Preparation of novel triarylazoimidazole trichlorogold(III) complexes is described. The new compounds were characterized using C, H, N elemental analyses, IR, UV/Vis and X-ray diffraction analysis. Structural characterization revealed that the distances N(imidazolic)···Au (2.030 ? (4) and 2.037 ? (5)) are significantly shorter than N(azo group)···Au (2.853 ? (4) and 2.899 ? (5)) indicating that the azo group is rather weakly coordinated at the Au(III) metal center. Thus, triarylazoimidazole trichlorogold(III) complexes could be described as square planar gold(III) complexes with weakly binding to the gold(III) center azogroup. Non-covalent chlorine···chlorine interactions were detected for 5 in the solid state and studied by DFT calculations and topological analysis of the electron density distribution within the framework of Bader's theory (QTAIM method). Theoretical studies demonstrated that short non-covalent Cl···Cl interactions (3.202 ?) play crucial role in self-assembly of high-valent Au(III) chloride.
