Publikācija: Eu³⁺ Ternary and Tetrakis Complexes with Carbazole and Methyl Group Substituted Dibenzoylmethane Derivatives: Induction of Aggregation Enhanced Emission

Publication Type	Scientific article indexed in SCOPUS or WOS database
Funding for basic activity	Research project
Defending:	,
Publication language	English (en)
Title in original language	Eu³⁺ Ternary and Tetrakis Complexes with Carbazole and Methyl Group Substituted Dibenzoylmethane Derivatives: Induction of Aggregation Enhanced Emission
Field of research	1. Natural sciences
Sub-field of research	1.4 Chemical sciences
Research platform	None
Authors	Ilze Māliņa Kaspars Traskovskis Natalija Lesina Aivars Vembris
Keywords	Europium ternary complex, Europium tetrakis complex, Partial energy transfer process, Aggregation enhanced emission, Carbazole
Abstract	Two dibenzoylmethane (DBM) derivatives with methyl (Me-DBM) or carbazole (CBZ-DBM) substituents at the para-position of the phenyl ring and their four novel ternary and tetrakis Eu3+ complexes with 1,10-phenanthroline (PHEN) as a secondary ligand or tetraethylamonium ion (N+(Et)4) as the counter-cation were synthesized and characterized. The investigation of the optical properties of the complexes revealed that Me-DBM based compounds exhibit aggregation enhanced emission (AEE), while in the case of CBZ-DBM this effect is not observed. At the same time, the introduction of a carbazole substituent reduces the emission quantum yield of the complexes. The decrease in luminescence efficiency for CBZ-DBM based Eu3+ complexes is mainly attributed to the closely situated S1 and T1 energy levels of the ligand that obstruct the intersystem crossing process.
DOI:	10.1016/j.dyepig.2018.11.060
Hyperlink:	https://www.sciencedirect.com/science/article/pii/S0143720818322022
Reference	Māliņa, I., Traskovskis, K., Lesina, N., Vembris, A. Eu³⁺ Ternary and Tetrakis Complexes with Carbazole and Methyl Group Substituted Dibenzoylmethane Derivatives: Induction of Aggregation Enhanced Emission. Dyes and Pigments, 2019, Vol. 163, pp.257-266. ISSN 0143-7208. Available from: doi:10.1016/j.dyepig.2018.11.060
Additional information	Citation count:   0
ID	30239