Publications

Authors:

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

Title:

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

Year:

2024

Type of item:

Articolo in Rivista

Tipologia ANVUR:

Articolo su rivista

Language:

Inglese

Format:

Elettronico

Referee:

Sì

Name of journal:

INORGANIC CHEMISTRY

ISSN of journal:

1520-510X

N° Volume:

63

Number or Folder:

49

Page numbers:

23188-23201

Keyword:

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

Short description of contents:

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)].

Product ID:

143402

Handle IRIS:

11562/1147527

Last Modified:

December 19, 2024

Bibliographic citation:

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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