Pubblicazioni

Autori:

Ruggieri, Silvia; Mizzoni, Silvia; Cavalli, Enrico; Sissa, Cristina; Anselmi, Michele; Gualandi, Andrea; Giorgio Cozzi, Pier; Carneiro Neto, Albano N.; Melchior, Andrea; Zinna, Francesco; Willis, Oliver G.; Di Bari, Lorenzo; Piccinelli, Fabio

Titolo:

Influence of Hydroxycoumarin Substituents on the Photophysical Properties of Chiroptical Tb(III) and Eu(III) Complexes

Anno:

2024

Tipologia prodotto:

Articolo in Rivista

Tipologia ANVUR:

Articolo su rivista

Lingua:

Inglese

Formato:

Elettronico

Referee:

Sì

Nome rivista:

INORGANIC CHEMISTRY

ISSN Rivista:

1520-510X

N° Volume:

63

Numero o Fascicolo:

49

Intervallo pagine:

23188-23201

Parole chiave:

Lanthanide ions, chirality, CPL, dynamics of energy transfer, DFT calculations

Breve descrizione dei contenuti:

In this article, the synthesis, density functional theory (DFT) structural characterization, and spectroscopic investigation of chiral and heteroleptic Tb(III) and Eu(III) complexes are presented. These molecules are characterized by two different ligands: the enantiopure N,N′-bis(2-pyridylmethyl)-trans-1,2-diaminocyclohexane-N,N′-diacetic acid (H2bpcd) and a hydroxycoumarin-based ligand bearing different substituents in C(3) position (i.e., acetyl group in Coum, ethyl ester in CoumA, secondary and tertiary amides in CoumB and CoumC, respectively). The coumarin ligands exhibited different luminescence sensitization efficiency toward Tb(III) and Eu(III) ions in the related complexes of chemical formula [Ln(bpcd)(Coum)], [Ln(bpcd)(CoumA)], [Ln(bpcd)(CoumB)], [Ln(bpcd)(CoumC)]. Through theoretical calculations of intramolecular energy transfer (IET) processes (ligand-to-metal) in Eu(III) and Tb(III) complexes, along with quantum yield calculations, we provide a reasonable explanation for the observed differences in their luminescence properties. The nature of the coumarin ligand also affects the chiroptical properties of the Tb(III) complexes [i.e., circularly polarized luminescence (CPL) and electronic circular dichroism (ECD)].

Id prodotto:

143402

Handle IRIS:

11562/1147527

ultima modifica:

19 dicembre 2024

Citazione bibliografica:

Ruggieri, Silvia; Mizzoni, Silvia; Cavalli, Enrico; Sissa, Cristina; Anselmi, Michele; Gualandi, Andrea; Giorgio Cozzi, Pier; Carneiro Neto, Albano N.; Melchior, Andrea; Zinna, Francesco; Willis, Oliver G.; Di Bari, Lorenzo; Piccinelli, Fabio, Influence of Hydroxycoumarin Substituents on the Photophysical Properties of Chiroptical Tb(III) and Eu(III) Complexes «INORGANIC CHEMISTRY» , vol. 63 , n. 49 , 2024 , pp. 23188-23201

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