Luminescent tetranuclear zinc complexes constructed from a tetradentate Schiff-base ligand derived from 2,3-dihydroxybenzaldehyde
Four compounds, [Zn<sub>4</sub>L<sub>2</sub>(HL)<sub>2</sub>](ClO<sub>4</sub>)<sub>2</sub>‧2H<sub>2</sub>O <b>1</b>, [Zn<sub>4</sub>L<sub>2</sub>(HL)<sub>2</sub>](NO<sub>3</sub>)<sub>2</sub>‧2H<sub>2</sub>O <b>2</b>, [Zn<sub>4</sub>L<sub>2</sub>(CH<sub>3</sub>COO)<sub>4</sub>]‧2H<sub>2</sub>O <b>3</b>, and [Zn<sub>4</sub>L<sub>2</sub>(C(CH<sub>3</sub>)<sub>3</sub>COO)<sub>4</sub>] <b>4</b>, have been obtained using a Schiff-base proligand, H<sub>2</sub>L, which was obtained from the condensation of 2,3-dihydroxybenzaldehyde with 2-(aminoethyl)pyridine. Their crystal structures have been solved by single-crystal X-ray diffraction. Compounds <b>1</b> and <b>2</b> feature {Zn<sub>4</sub>O<sub>6</sub>} cores with alternate mono- and bis-phenoxido bridges. Compounds <b>3</b> and <b>4</b> are constructed from L<sup>2-</sup> and carboxylato ligands, resulting in neutral linear tetranuclear species. TD-DFT calculations have been carried out to rationalize the electronic spectra of our complexes. The experimental luminescence spectra of the four complexes have been investigated in DMF solutions.
Publication Details
- Journal
- Figshare
- Published
- 2025-01-01
- DOI
- https://doi.org/10.6084/m9.figshare.28144022
- Primary Topic
- Lanthanide and Transition Metal Complexes
- Type
- article
- Field-Weighted Citation Impact
- 0.00