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Ruggieri S, Mizzoni S, Nardon C, Cavalli E, Sissa C, Anselmi M, Cozzi PG, Gualandi A, Sanadar M, Melchior A, Zinna F, Willis OG, Di Bari L, Piccinelli F. Circularly Polarized Luminescence from New Heteroleptic Eu(III) and Tb(III) Complexes. Inorg Chem 2023. [PMID: 37262334 DOI: 10.1021/acs.inorgchem.3c00196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The complexes [Eu(bpcd)(tta)], [Eu(bpcd)(Coum)], and [Tb(bpcd)(Coum)] [tta = 2-thenoyltrifluoroacetyl-acetonate, Coum = 3-acetyl-4-hydroxy-coumarin, and bpcd = N,N'-bis(2-pyridylmethyl)-trans-1,2-diaminocyclohexane-N,N'-diacetate] have been synthesized and characterized from photophysical and thermodynamic points of view. The optical and chiroptical properties of these complexes, such as the total luminescence, decay curves of the Ln(III) luminescence, electronic circular dichroism, and circularly polarized luminescence, have been investigated. Interestingly, the number of coordinated solvent (methanol) molecules is sensitive to the nature of the metal ion. This number, estimated by spectroscopy, is >1 for Eu(III)-based complexes and <1 for Tb(III)-based complexes. A possible explanation for this behavior is provided via the study of the minimum energy structure obtained by density functional theory (DFT) calculations on the model complexes of the diamagnetic Y(III) and La(III) counterparts [Y(bpcd)(tta)], [Y(bpcd)(Coum)], and [La(bpcd)(Coum)]. By time-dependent DFT calculations, estimation of donor-acceptor (D-A) distances and of the energy position of the S1 and T1 ligand excited states involved in the antenna effect was possible. These data are useful for rationalizing the different sensitization efficiencies (ηsens) of the antennae toward Eu(III) and Tb(III). The tta ligand is an optimal antenna for sensitizing Eu(III) luminescence, while the Coum ligand sensitizes better Tb(III) luminescence {ϕovl = 55%; ηsens ≥ 55% for the [Tb(bpcd)(Coum)] complex}. Finally, for the [Eu(bpcd)(tta)] complex, a sizable value of glum (0.26) and a good quantum yield (26%) were measured.
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Affiliation(s)
- Silvia Ruggieri
- Luminescent Materials Laboratory, DB, University of Verona, and INSTM, UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy
| | - Silvia Mizzoni
- Luminescent Materials Laboratory, DB, University of Verona, and INSTM, UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy
| | - Chiara Nardon
- Luminescent Materials Laboratory, DB, University of Verona, and INSTM, UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy
| | - Enrico Cavalli
- Department of Chemistry, Life Sciences and Environmental Sustainability, Parma University, Parco Area delle Scienze, 17/a, 43124 Parma, Italy
| | - Cristina Sissa
- Department of Chemistry, Life Sciences and Environmental Sustainability, Parma University, Parco Area delle Scienze, 17/a, 43124 Parma, Italy
| | - Michele Anselmi
- Department of Chemistry "G. Ciamician", University of Bologna, via Selmi 2, 40126 Bologna, Italy
| | - Pier Giorgio Cozzi
- Department of Chemistry "G. Ciamician", University of Bologna, via Selmi 2, 40126 Bologna, Italy
- Center for Chemical Catalysis - C3, Alma Mater Studiorum - Università di Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Andrea Gualandi
- Department of Chemistry "G. Ciamician", University of Bologna, via Selmi 2, 40126 Bologna, Italy
- Center for Chemical Catalysis - C3, Alma Mater Studiorum - Università di Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Martina Sanadar
- Dipartimento Politecnico di Ingegneria e Architettura, Laboratorio di Tecnologie Chimiche, Università di Udine, via Cotonificio 108, 33100 Udine, Italy
| | - Andrea Melchior
- Dipartimento Politecnico di Ingegneria e Architettura, Laboratorio di Tecnologie Chimiche, Università di Udine, via Cotonificio 108, 33100 Udine, Italy
| | - Francesco Zinna
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Oliver G Willis
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Lorenzo Di Bari
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Fabio Piccinelli
- Luminescent Materials Laboratory, DB, University of Verona, and INSTM, UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy
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Lovison D, Alessi D, Allegri L, Baldan F, Ballico M, Damante G, Galasso M, Guardavaccaro D, Ruggieri S, Melchior A, Veclani D, Nardon C, Baratta W. Enantioselective Cytotoxicity of Chiral Diphosphine Ruthenium(II) Complexes Against Cancer Cells. Chemistry 2022; 28:e202200200. [PMID: 35394095 PMCID: PMC9322675 DOI: 10.1002/chem.202200200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Indexed: 11/09/2022]
Abstract
The chiral cationic complex [Ru(η1‐OAc)(CO)((R,R)‐Skewphos)(phen)]OAc (2R), isolated from reaction of [Ru(η1‐OAc)(η2‐OAc)(R,R)‐Skewphos)(CO)] (1R) with phen, reacts with NaOPiv and KSAc affording [RuX(CO)((R,R)‐Skewphos)(phen)]Y (X=Y=OPiv 3R; X=SAc, Y=OAc 4R). The corresponding enantiomers 2S‐4S have been obtained from 1S containing (S,S)‐Skewphos. Reaction of 2R and 2S with (S)‐cysteine and NaPF6 at pH=9 gives the diastereoisomers [Ru((S)‐Cys)(CO)(PP)(phen)]PF6 (PP=(R,R)‐Skewphos 2R‐Cys; (S,S)‐Skewphos 2S‐Cys). The DFT energetic profile for 2R with (S)‐cysteine in H2O indicates that aquo and hydroxo species are involved in formation of 2R‐Cys. The stability of the ruthenium complexes in 0.9 % w/v NaCl solution, PBS and complete DMEM medium, as well as their n‐octanol/water partition coefficient (logP), have been evaluated. The chiral complexes show high cytotoxic activity against SW1736, 8505 C, HCT‐116 and A549 cell lines with EC50 values of 2.8–0.04 μM. The (R,R)‐Skewphos derivatives show higher cytotoxicity compared to their enantiomers, 4R (EC50=0.04 μM) being 14 times more cytotoxic than 4S against the anaplastic thyroid cancer 8505 C cell line.
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Affiliation(s)
- Denise Lovison
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali Università di Udine Via Cotonificio 108 33100 Udine Italy
| | - Dario Alessi
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali Università di Udine Via Cotonificio 108 33100 Udine Italy
| | - Lorenzo Allegri
- Dipartimento di Area Medica - Istituto di Genetica Medica Università di Udine Via Chiusaforte, F3 33100 Udine Italy
| | - Federica Baldan
- Dipartimento di Area Medica - Istituto di Genetica Medica Università di Udine Via Chiusaforte, F3 33100 Udine Italy
| | - Maurizio Ballico
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali Università di Udine Via Cotonificio 108 33100 Udine Italy
| | - Giuseppe Damante
- Dipartimento di Area Medica - Istituto di Genetica Medica Università di Udine Via Chiusaforte, F3 33100 Udine Italy
| | - Marilisa Galasso
- Centro di Ricerca LURM Laboratorio Interdipartimentale di Ricerca Medica Università di Verona, Policlinico G.B. Rossi P.L.A. Scuro 10 37134 Verona Italy
| | - Daniele Guardavaccaro
- Dipartimento di Biotecnologie Università di Verona Strada Le Grazie, 15 37134 Verona Italy
| | - Silvia Ruggieri
- Dipartimento di Biotecnologie Università di Verona Strada Le Grazie, 15 37134 Verona Italy
| | - Andrea Melchior
- Dipartimento Politecnico di Ingegneria e Architettura Università di Udine Via Cotonificio 108 33100 Udine Italy
| | - Daniele Veclani
- Dipartimento Politecnico di Ingegneria e Architettura Università di Udine Via Cotonificio 108 33100 Udine Italy
| | - Chiara Nardon
- Dipartimento di Biotecnologie Università di Verona Strada Le Grazie, 15 37134 Verona Italy
| | - Walter Baratta
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali Università di Udine Via Cotonificio 108 33100 Udine Italy
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Adewuyi JA, Schley ND, Ung G. Synthesis of bright water-soluble circularly polarized luminescence emitters as potential sensors. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01398j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Complexes exhibiting strong circularly polarized luminescence in water were synthesized and used as CPL probes sensing pH and metal ions.
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Affiliation(s)
- Joseph A. Adewuyi
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, USA
| | - Nathan D. Schley
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Gaël Ung
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, USA
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