Complex [Pt(iPr2 pipdt)(Quinoxdt)] (iPr2 pipdt=1,4-diisopropyl-piperazine-2,3-dithione; Quinoxdt=[1,4]dithiino[2,3-b]quinoxaline-2,3-dithiolate) exhibits a remarkable green emission at 570 nm (room temperature), which is above the lowest excited state. The complex is characterized by negative solvatochromism as well as a high second-order polarizability. Addition of AgI ions induces 1) hypsochromic shift of the lowest frequencies and 2) reversible quenching of luminescence. The corresponding Ni and Pd complexes have also been prepared and investigated to assist interpretation of optical properties within the triad. Computational studies based on DFT and time-dependent DFT highlight the electronic properties of [Pt(iPr2 pipdt)(Quinoxdt)]. The preferential site of interaction between the Pt complex and incoming AgI is evidenced by the shape of the Fukui functions, pointing to the thiolic sulfur and platinum atoms as the most reactive sites towards a soft cation. Calculated optical properties are in agreement with experimental findings. This study sheds light on the structure-property relationship for this class of compounds.

Uncommon Optical Properties and Silver-Responsive Turn-Off/On Luminescence in a PtIIHeteroleptic Dithiolene Complex / Salahuddin, S Attar; Flavia, Artizzu; Marchio', Luciano; Davide, Espa; Luca, Pilia; Maria, F Casula; Angela, Serpe; Maddalena, Pizzotti; Alessio, Orbelli-Biroli; Paola, Deplano. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - 24:41(2018), pp. 10503-10512. [10.1002/chem.201801697]

Uncommon Optical Properties and Silver-Responsive Turn-Off/On Luminescence in a PtIIHeteroleptic Dithiolene Complex

Luciano Marchiò
Formal Analysis
;
2018-01-01

Abstract

Complex [Pt(iPr2 pipdt)(Quinoxdt)] (iPr2 pipdt=1,4-diisopropyl-piperazine-2,3-dithione; Quinoxdt=[1,4]dithiino[2,3-b]quinoxaline-2,3-dithiolate) exhibits a remarkable green emission at 570 nm (room temperature), which is above the lowest excited state. The complex is characterized by negative solvatochromism as well as a high second-order polarizability. Addition of AgI ions induces 1) hypsochromic shift of the lowest frequencies and 2) reversible quenching of luminescence. The corresponding Ni and Pd complexes have also been prepared and investigated to assist interpretation of optical properties within the triad. Computational studies based on DFT and time-dependent DFT highlight the electronic properties of [Pt(iPr2 pipdt)(Quinoxdt)]. The preferential site of interaction between the Pt complex and incoming AgI is evidenced by the shape of the Fukui functions, pointing to the thiolic sulfur and platinum atoms as the most reactive sites towards a soft cation. Calculated optical properties are in agreement with experimental findings. This study sheds light on the structure-property relationship for this class of compounds.
2018
Uncommon Optical Properties and Silver-Responsive Turn-Off/On Luminescence in a PtIIHeteroleptic Dithiolene Complex / Salahuddin, S Attar; Flavia, Artizzu; Marchio', Luciano; Davide, Espa; Luca, Pilia; Maria, F Casula; Angela, Serpe; Maddalena, Pizzotti; Alessio, Orbelli-Biroli; Paola, Deplano. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - 24:41(2018), pp. 10503-10512. [10.1002/chem.201801697]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2850606
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 8
social impact