Zn(II) complexes of substituted oxyacridinate ligands. Synthesis, structure and properties

• Published in: Journal of molecular structure 2021-04, Vol.1229, p.129798, Article 129798
• Main Authors: Balashova, Tatyana V., Arsenyev, Maxim V., Polyakova, Svetlana K., Ilichev, Vasily A., Kukinov, Andrey A., Rumyantcev, Roman V., Fukin, Georgy K., Trufanov, Alexey N., Bochkarev, Mikhail N.
• Format: Article
• Language: English
• Subjects: Photophysical properties; Substituted oxyacridinate ligands; Zn(II) complexes
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2020.129798

•New Zn(II) complexes with substituted oxyacridinate ligands have been synthesized.•Their structures were determined by X-ray diffraction.•All the complexes showed moderate PL activity.•Some of the compounds showed EL activity in OLEDs.•Resistivity to n,γ-irradiation was demonstrated with one compound. A number of new zinc complexes with  1,3-di‑tert‑butyl‑7-methylacridin-4-olate or 1,3-di‑tert‑butyl‑7-bromoacridin-4-olate ligands Zn(AcrMe)2, Zn(AcrMe)2(DMSO), Zn(AcrMe)2(Py)2, [Zn(Et)(AcrMe)]2, Zn(AcrBr)2, Zn(AcrBr)2(DMSO) and [Zn(Et)(AcrBr)]2 were synthesized by the reaction of respective acridinol with Et2Zn and structurally characterized.  All compounds exhibited photoluminescence in the form of a single band in the 600 - 700 nm region. Compounds Zn(AcrMe)2 and [Zn(Et)(AcrMe)]2 displayed also weak electroluminescent properties. It is found that introduction of both alkyl or bromine substituents into acridine rings cause the hypsochromic shift of emission band. The resistance of organozinc complexes to strong ionizing radiation was studied using the example of [Zn(Et)(AcrMe)]2. X-ray diffraction study showed that the molecular structure of the complex did not change after strong neutron-gamma irradiation for 45 h.