New Collaborative Research Article published in Polyhedron (IF 2.4)

Happy to share our new research article published in Polyhedron (IF: 2.4), an interdisciplinary collaboration with the research group of Nenad Filipovic and other research groups from University of Belgrad (Serbia) and with researchers from the University of Tartu (Estonia), Institute Ruđer Bošković (Croatia), University of Novi Sad (Serbia), Universidad de La Rioja (Spain), and Marmara University (Turkey).

Structural insights and photophysical properties of mononuclear and pentanuclear Zn(II) acetate complexes with pyridyl-based thiazolyl-hydrazones

Araskov J.B., Garcia-Sosa A.T., Visnjevac A., Sousa S.F., Hollo B.B., Uguz O., Koca A., Monge M., Rodriguez-Castillo M., Lopez-de-Luzuriaga J.M., Todorovic T.R., and Filipovic N.R.

Polyhedron 262 (2024)

Article | DOI: 10.1016/j.poly.2024.117162

The solid state structures of zinc complexes with HLS1 and HLS3 ligands are reported, where HLS1 is 2-(2-(pyridin-2-ylmethylene)hydrazinyl)-4-fenil-1,3-thiazole and HLS3 is 2-(2-(pyridin-2-ylmethylene)hydrazinyl)-4-(4-methylphenyl)-1,3-thiazole. Structurally similar ligands form complexes of different structures with general formulas [Zn5(LS1)4(AcO)6] (1-AcO) and [Zn(LS3)(AcO)(H2O)] (3-AcO). The pentacoordinated complex 3-AcO exhibits NNN tridentate ligand coordination mode, with additional oxygen donor atoms from a water molecule and acetate anion. The structure of 1-AcO is unique as it is the first example of a pentanuclear complex with pyridyl-based thiazolyl-hydrazone ligands, containing an unprecedented centrosymmetric Zn3(AcO)6 cluster. Photophysical studies showed that 1-AcO is not photoactive, while 3-AcO displayed photoluminescent emission, attributed to ligand-based transitions as determined by time-dependent density functional theory (TD-DFT) calculations. This study underscores the role of molecular symmetry in predicting the photoactivity of at least Zn(II) complexes containing photo-inactive ligands.