Antimony( <scp>v</scp> ) complexes with tetradentate ONNO redox-active ligands: optical, electrochemical and photothermal properties
New antimony(V) complexes, 1 and 2, containing the redox-active ligands <i>N</i>,<i>N</i>'-bis(3,5-di-<i>tert</i>-butyl-2-hydroxyphenyl)-1,2-phenylenediamine (LH<sub>4</sub>) and glyoxal-bis(2-hydroxy-3,5-di-<i>tert</i>-butylanil) (L'H<sub>2</sub>), respectively, were synthesized and characterized. Single-crystal X-ray diffraction analysis showed that complexes 1 and 2 exhibit distorted pentagonal bipyramidal structures. These complexes contain a tetradentate, redox-active ONNO ligand that, doubly deprotonated, forms a dianion with a nearly planar core. The UV/vis/NIR absorption spectra of 1 and 2 demonstrate intense bands in the 500-1000 nm range attributed to intraligand charge transfer (ILCT). Electrochemical analysis demonstrates the redox-amphoteric properties of complexes 1 and 2. Complex 1 also exhibits efficient photothermal conversion (<i>η</i> = 57%) under 808 nm laser irradiation.
Authors
- Irina N. Meshcheryakova (ORCID: https://orcid.org/0000-0001-5029-0921)
- Alexandr V. Piskunov (ORCID: https://orcid.org/0000-0002-8200-9433)
- Svetlana V. Baryshnikova (ORCID: https://orcid.org/0000-0002-6498-4139)
- T. N. Kocherova (ORCID: https://orcid.org/0000-0001-9797-2399)
- Maxim V. Arsenyev (ORCID: https://orcid.org/0000-0001-5275-8241)
- Ilya Yakushev (ORCID: https://orcid.org/0000-0003-2539-7334)
- Tatyana N. Kocherova (ORCID: https://orcid.org/0000-0003-1402-9878)
- D. S. Kolevatov
- Polina O. Shisterova
Institutions
- A. N. Nesmeyanov Institute of Organoelement Compounds (RU)
- NS Kurnakova Institute of General and Inorganic Chemistry (RU)
- G.A. Razuvaev Institute of Organometallic Chemistry (RU)
Publication Details
- Journal
- Dalton Transactions
- Published
- 2025-12-05
- DOI
- https://doi.org/10.1039/d5dt02666k
- Citations
- 1
- Primary Topic
- Magnetism in coordination complexes
- Type
- article
- Field-Weighted Citation Impact
- 0.43