Eu3+ ternary and tetrakis complexes with carbazole and methyl group substituted dibenzoylmethane derivatives: Induction of aggregation enhanced emission

被引：3

作者：

Malina, Ilze ^{[1
]}

Traskovskis, Kaspars ^{[1
]}

Lesina, Natalija ^{[2
]}

Vembris, Aivars ^{[2
]}

机构：

[1] Riga Tech Univ, Inst Appl Chem, Paula Valdena Str 3, LV-1048 Riga, Latvia

[2] Univ Latvia, Inst Solid State Phys, Kengaraga Str 8, LV-1063 Riga, Latvia

来源：

DYES AND PIGMENTS | 2019年 / 163卷

关键词：

Europium ternary complex; Europium tetrakis complex; Partial energy transfer process; Aggregation enhanced emission; Carbazole; CRYSTALLIZATION-INDUCED EMISSION; LUMINESCENCE PROPERTIES; EUROPIUM(III) COMPLEX; OPTICAL-PROPERTIES; EU(III) COMPLEXES; BETA-DIKETONES; BASIS-SETS; LIGAND; FUNCTIONALIZATION; EXCITATION;

D O I：

10.1016/j.dyepig.2018.11.060

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

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 S-1 and T-1 energy levels of the ligand that obstruct the intersystem crossing process.

引用

页码：257 / 266

页数：10

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