Martínez-Ceberio, CarlosTorralba Martínez, María Del CarmenDuarte, FredericoHerrero Domínguez, SantiagoCano Esquivel, María MercedesLodeiro, CarlosCuerva de Alaiz, Cristian2024-05-212024-05-212023-09Martínez-Ceberio C, Torralba MC, Duarte F, Herrero S, Cano M, Lodeiro C, Cuerva C. Mesomorphism and luminescence in coordination compounds and ionic salts based on pyridine-functionalized β-diketones. Influence of the pyridine nitrogen position. J. Mol. Liq. 2023, 385, 1222900167-732210.1016/j.molliq.2023.122290https://hdl.handle.net/20.500.14352/104266Pyridine-functionalized β-diketones with the pyridine nitrogen atom at 3 or 4 position (L3N and L4N, respectively) have been used as building blocks to obtain two new families of compounds with mesomorphic and luminescent behaviors. The N-pyridine coordination of the β-diketones to zinc(II), palladium(II) and platinum(II) metal centers has allowed to synthesize neutral coordination compounds of the type [MCl2(LZN)2] (M = Zn(II), Pd(II), Pt(II); Z = 3, 4). Particularly, coordination of L4N towards Pt(II) gives rise to the cationic species [Pt(NH3)2(L4N)2]2+. Otherwise, protonation of the pyridine moiety was strategically used to obtain a novel series of pyridinium ionic salts of the type (HLZN)nA (n = 1, A = Cl; n = 2, A = MCl4, M = Zn(II), Pd(II), Pt(II); Z = 3, 4). The neutral or ionic nature of the complexes, as well as the β-diketone ligands and the metal center in both the neutral and anionic complexes, has a great influence on the mesomorphic behavior. Thus, columnar or smectic mesophases can be selectively formed. Single-crystal and temperature-dependent powder X-ray diffraction studies have been performed to analyze the molecular packing in the crystal and the supramolecular ordering in the mesophase. All the aforementioned factors also play a key role on the luminescence properties, the Zn(II) coordination compounds and ionic salts being the best candidates as bifunctional materials.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal articlehttps://www.sciencedirect.com/science/article/pii/S0167732223010930?via%3Dihubopen access546Liquid crystalsMetallomesogensLuminescenceIonic saltsDiketonesQuímica2303 Química Inorgánica