Synthesis of heteroleptic ytterbium complexes with electron-accepting- and electron-donor-substituted 2-tosylamino-benzylidene-aryloyl-hydrazones for host-free NIR emitting OLEDs

Synthesis of heteroleptic ytterbium complexes with electron-accepting- and electron-donor-substituted 2-tosylamino-benzylidene-aryloyl-hydrazones for host-free NIR emitting OLEDs Full article

Journal

Inorganic Chemistry Communications
ISSN: 1387-7003 , E-ISSN: 1879-0259

Output data

Year: 2026, Volume: 186, Number: 2, Article number : 116297, Pages count : DOI: 10.1016/j.inoche.2026.116297

Authors

Koshelev Daniil ^1,2 , Medved'ko Aleksei ³ , Vashchenko Andrey ⁴ , Lepnev Leonid ⁴ , Goloveshkin Alexander ⁵ , Maloshitskaya Olga ¹ , Chikineva Tatiana ⁶ , Pavlov Alexander ^7,6 , Roslyakov Ilya V. ^1,2 , Utochnikova Valentina ^1,2

Affiliations

1	Chemistry faculty, Lomonosov Moscow State University, 1/3 Leninskie Gory, Moscow 119991, Russia
2	Faculty of Material Science, Lomonosov Moscow State University, 1/73 Leninskie Gory, Moscow 119991, Russia
3	N.D. Zelinsky Institute of Organic Chemistry RAS, 47 Leninskii Prospekt, Moscow, 119991, Russia
4	Р.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53, Leninskii Prosp, GSP-1, Moscow 119991, Russia
5	A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova St., Moscow 119334, Russia
6	Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninskii Prosp, GSP-1, Moscow 119071, Russia
7	Bauman Moscow State Technical University, 2-ya Baumanskaya Street 5, Structure 1, Moscow 105005. Russia

A series of new lanthanide complexes with electron-donating (triphenylamine-, phenylcarbazole-) and electron-withdrawing (benzoxazole-, methyloxodiazole-, and phenyloxodiazole-) substituted Schiff bases ((E)-N-(2-((2-aryloylhydrazono)methyl)phenyl)-4-methylbenzenesulfonamide), designed to enhance charge carrier mobility, have been synthesized and fully characterized as well as the 2 structures of the compounds were established. Heteroleptic complexes with ligands of both classes were obtained during the mixed-ligand method synthesis. Photoluminescence quantum yield of heteroleptic species in contrast to luminescence lifetime was found to be higher than homoleptic ones – up to 1.65%. An 16% improvement in external current efficiency (ECE) in the same OLED heterostructure was shown (ECE up to 140 μW/W) in comparison with homoleptic ones (ECE up to 120 μW/W). This proves the correctness of the approach to improvement of the electroluminescence of the OLED based on the metal complexes.

Koshelev D. , Medved'ko A. , Vashchenko A. , Lepnev L. , Goloveshkin A. , Maloshitskaya O. , Chikineva T. , Pavlov A. , Roslyakov I.V. , Utochnikova V.
Synthesis of heteroleptic ytterbium complexes with electron-accepting- and electron-donor-substituted 2-tosylamino-benzylidene-aryloyl-hydrazones for host-free NIR emitting OLEDs
Inorganic Chemistry Communications. 2026. V.186. N2. 116297 . DOI: 10.1016/j.inoche.2026.116297 WOS Scopus OpenAlex

Submitted:	Dec 1, 2025
Published online:	Feb 12, 2026

≡ Web of science:	WOS:001690362300001
≡ Scopus:	2-s2.0-105029635146
≡ OpenAlex:	W7127982119