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Paderni D, Voccia M, Macedi E, Formica M, Giorgi L, Caporaso L, Fusi V. A combined solid state, solution and DFT study of a dimethyl-cyclen-Pd(II) complex. Dalton Trans 2024; 53:14300-14314. [PMID: 39133309 DOI: 10.1039/d4dt01791a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
A new palladium(II) complex containing the previously synthesized 4,10-bis[(3-hydroxy-4-pyron-2-yl)methyl]-1,7-dimethyl-1,4,7,10-tetraazacyclododecane ligand maltonis was prepared and characterized both in solution and in the solid state. Hirshfeld surface and energy framework analyses were also performed. Because maltonis already showed antineoplastic activity, the complexation of Pd(II), chosen as an alternative to Pt(II), was investigated to study its possible biological activity. UV-vis and NMR studies confirmed the formation and stability of the complex in aqueous solution at physiological pH. X-ray diffraction data revealed a structure where the Pd(II) ion is lodged in the dimethyl-cyclen cavity, with maltol rings facing each other (closed shape) even if they are not involved in the coordination. DFT analysis was performed in order to understand the most stable shape of the complex. In view of evaluating its possible bioactive conformation, the DFT study suggested a slight energetic preference for the closed one. The resulting closed complex was stabilized in the X-ray structure by intermolecular interactions that replace the intramolecular interactions present in the optimized complex. According to the DFT calculated formation energies, notwithstanding its rarity, the Pd(II) complex of maltonis is the thermodynamically preferred one among analogous complexes containing different metal ions (Pt(II), Co(II), and Cu(II)). Finally, to study its possible biological activity, the interaction between the Pd(II) complex of maltonis and nucleosides was evaluated through NMR and DFT calculations, revealing a possible interaction with purines via the maltol moieties.
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Affiliation(s)
- Daniele Paderni
- Department of Pure and Applied Sciences, University of Urbino, via Ca' le Suore 2-4, 61029 Urbino, Italy.
| | - Maria Voccia
- Department of Chemistry and Biology, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, Salerno, Italy
| | - Eleonora Macedi
- Department of Pure and Applied Sciences, University of Urbino, via Ca' le Suore 2-4, 61029 Urbino, Italy.
| | - Mauro Formica
- Department of Pure and Applied Sciences, University of Urbino, via Ca' le Suore 2-4, 61029 Urbino, Italy.
| | - Luca Giorgi
- Department of Pure and Applied Sciences, University of Urbino, via Ca' le Suore 2-4, 61029 Urbino, Italy.
| | - Lucia Caporaso
- Department of Chemistry and Biology, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, Salerno, Italy
| | - Vieri Fusi
- Department of Pure and Applied Sciences, University of Urbino, via Ca' le Suore 2-4, 61029 Urbino, Italy.
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Giorgi L, Ambrosi G, Paderni D, Conti L, Amatori S, Romagnoli F, Rossi P, Formica M, Macedi E, Giorgi C, Paoli P, Fanelli M, Fusi V. Bis-maltol-polyamine family: structural modifications at strategic positions. Synthesis, coordination and antineoplastic activity of two new ligands. NEW J CHEM 2021. [DOI: 10.1039/d0nj05327a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Substitution at the maltol C6 position affects the antineoplastic and coordination properties of Malten, acting on degradation time, binding ability and biological activity.
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Affiliation(s)
- Luca Giorgi
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Gianluca Ambrosi
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Daniele Paderni
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Luca Conti
- Department of Chemistry “Ugo Schiff”, University of Florence
- 50019 Sesto Fiorentino
- Italy
| | - Stefano Amatori
- Department of Biomolecular Sciences, Molecular Pathology Laboratory “PaoLa” University of Urbino “Carlo Bo”
- 61032 Fano
- Italy
| | - Francesca Romagnoli
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Patrizia Rossi
- Department of Industrial Engineering, University of Florence
- 50139 Florence
- Italy
| | - Mauro Formica
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Eleonora Macedi
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Claudia Giorgi
- Department of Chemistry “Ugo Schiff”, University of Florence
- 50019 Sesto Fiorentino
- Italy
| | - Paola Paoli
- Department of Industrial Engineering, University of Florence
- 50139 Florence
- Italy
| | - Mirco Fanelli
- Department of Biomolecular Sciences, Molecular Pathology Laboratory “PaoLa” University of Urbino “Carlo Bo”
- 61032 Fano
- Italy
| | - Vieri Fusi
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
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