banca dati delle tesi e dissertazioni accademiche elettroniche
| Tipo di tesi | Tesi di laurea magistrale | ||||||||||||||||||||||||||||||
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| Autore | RULLO, MAURO | ||||||||||||||||||||||||||||||
| URN | etd-03162018-104838 | ||||||||||||||||||||||||||||||
| Titolo | synthesis and characterisation of luminescent rhenium-based molecular triangles | ||||||||||||||||||||||||||||||
| Titolo in inglese | |||||||||||||||||||||||||||||||
| Struttura | Dipartimento di Scienze Chimiche e Geologiche | ||||||||||||||||||||||||||||||
| Corso di studi | SCIENZE CHIMICHE (D.M. 270/04) | ||||||||||||||||||||||||||||||
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| Data inizio appello | 2018-04-12 | ||||||||||||||||||||||||||||||
| Disponibilità | Accessibile via web (tutti i file della tesi sono accessibili) | ||||||||||||||||||||||||||||||
Riassunto analitico
Abstract: A family of eight neutral rhenium(I)-based molecular triangles complexes of general formula [Re3(CO)9(u-L)3)] have been synthesized and characterized. The complexes are distinguished by variations of the substituents or degree of π-conjugation on the bridging 5-(pyrid-2-yl)tetrazolato ligands L–. The photo-physical properties of these species have been evaluated in organic media, revealing predominantly an emission originating from mixed metal-to-ligand and ligand-to-ligand charge transfer excited states of triplet multiplicity. These emissions are characterized by typically long excited-state lifetimes (from ~hundreds of ns to ~tens of microsecond), and quantum yields around 5–10% in organic solvent. Increasing of π-conjugation or a decrease in electronic density on π system localized on the tetrazolato ligands of the complexes, caused a systematic red-shift of the emission profiles. |
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Abstract
Abstract: A family of eight neutral rhenium(I)-based molecular triangles complexes of general formula [Re3(CO)9(u-L)3)] have been synthesized and characterized. The complexes are distinguished by variations of the substituents or degree of π-conjugation on the bridging 5-(pyrid-2-yl)tetrazolato ligands L–. The photo-physical properties of these species have been evaluated in organic media, revealing predominantly an emission originating from mixed metal-to-ligand and ligand-to-ligand charge transfer excited states of triplet multiplicity. These emissions are characterized by typically long excited-state lifetimes (from ~hundreds of ns to ~tens of microsecond), and quantum yields around 5–10% in organic solvent. Increasing of π-conjugation or a decrease in electronic density on π system localized on the tetrazolato ligands of the complexes, caused a systematic red-shift of the emission profiles. |
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