RT Journal Article
T1 Mesomorphism and luminescence in coordination compounds and ionic salts based on pyridine-functionalized β-diketones. Influence of the pyridine nitrogen position
A1 Martínez-Ceberio, Carlos
A1 Torralba Martínez, María Del Carmen
A1 Duarte, Frederico
A1 Herrero Domínguez, Santiago
A1 Cano Esquivel, María Mercedes
A1 Lodeiro, Carlos
A1 Cuerva de Alaiz, Cristian
AB Pyridine-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.
PB Elsevier
SN 0167-7322
YR 2023
FD 2023-09
LK https://hdl.handle.net/20.500.14352/104266
UL https://hdl.handle.net/20.500.14352/104266
LA eng
NO Martínez-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, 122290
NO Comunidad de Madrid (España), project B2017/BMD-3770-CM
NO Associate Laboratory for Green Chemistry - LAQV (Portugal), FCT/MCTES (UIDB/50006/2020 and UIDP/50006/2020)
NO Scientific Society PROTEOMASS (Portugal), Funding Grant 2022
NO Fundação para a Ciência e a Tecnologia - FCT/MEC (Portugal), predoctoral grant 2021.05161.BD
DS Docta Complutense
RD 7 abr 2025