Dinuclear Nickel (II) 2,2′-Bibenzimidazole Bridged Complexes: Synthesis, Structure, Magnetic, and Electrochemical Properties

Dinuclear Nickel (II) 2,2′-Bibenzimidazole Bridged Complexes: Synthesis, Structure, Magnetic, and Electrochemical Properties Full article

Journal

Inorganica Chimica Acta
ISSN: 0020-1693

Output data

Year: 2025, Volume: 579, Article number : 122555, Pages count : DOI: 10.1016/j.ica.2025.122555

Authors

Kagilev Alexey A. ¹ , Gafurov Zufar N. ¹ , Evdokimov Artem S. ² , Sakhapov Il’yas F. ¹ , Dobrynin Alexey B. ^1,3 , Morozov Vladimir I. ¹ , Zaripov Ruslan B. ⁴ , Zueva Ekaterina M. ⁵ , Bogomyakov Artem S. ⁶ , Kantyukov Artyom O. ^1,2 , Zhukova Nataliya A. ¹ , Sinyashin Oleg G. ¹ , Mamedov Vakhid A. ¹ , Yakhvarov Dmitry G. ^1,2

Affiliations

1	Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov Str. 8, Kazan 420088, Russia
2	Alexander Butlerov Institute of Chemistry, Kazan Federal University, Kremlyovskaya Str. 18, Kazan 420008, Russia
3	Kazan National Research Technical University named after A. N. Tupolev -KAI, Karl Marx Str. 10, Kazan 420111, Russia
4	Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center, Russian Academy of Sciences, Sibirsky tract 10/7, Kazan 420029, Russia
5	Department of Inorganic Chemistry, Kazan National Research Technological University, Karl Marx Str. 68, Kazan 420015, Russia
6	International Tomography Center, Siberian Branch of the Russian Academy of Sciences, Institutskaya St. 3a, Novosibirsk 630090, Russia

The reaction of [NiBr2(bpy)2] (bpy = 2,2′-bipyridine) with 2,2′-bibenzimidazole or 5,5′,6,6′-tetramethyl-2,2′-bibenzimidazole (bbim) in the presence of AgBF4 and Et3N results in the formation of dinuclear nickel(II) complexes with bridging bbim ligands. The crystal structures of the obtained complexes [Ni2(μ-bbim)(bpy)4][(BF4)2] have been determined. Variable-temperature EPR as well as magnetometry experiments indicate antiferromagnetic interactions between the nickel atoms in the complex molecule at low temperatures. Density functional theory (DFT) calculations confirm these findings. Cyclic voltammetry and in situ EPR spectroelectrochemistry demonstrated that these complexes can be electrochemically reduced resulting in the formation of Ni(I) and Ni(0) derivatives. This can be considered as a strategy for controlling the electronic state of these dinuclear nickel complexes, thus providing a way to design magnetic materials with switchable properties.

Kagilev A.A. , Gafurov Z.N. , Evdokimov A.S. , Sakhapov I.F. , Dobrynin A.B. , Morozov V.I. , Zaripov R.B. , Zueva E.M. , Bogomyakov A.S. , Kantyukov A.O. , Zhukova N.A. , Sinyashin O.G. , Mamedov V.A. , Yakhvarov D.G.
Dinuclear Nickel (II) 2,2′-Bibenzimidazole Bridged Complexes: Synthesis, Structure, Magnetic, and Electrochemical Properties
Inorganica Chimica Acta. 2025. V.579. 122555 . DOI: 10.1016/j.ica.2025.122555 WOS Scopus

Published print:

May 1, 2025

Web of science:	WOS:001422264100001
Scopus:	2-s2.0-85216273768

DB	Citing
Scopus	3
Web of science	3