.

Complex [Pt(iPr2pipdt)(Quinoxdt)](iPr2pipdt=1,4-diisopropyl-piperazine-2,3-dithione;Quinoxdt=[1,4]dithii-no[2,3-b]quinoxaline-2,3-dithiolate) exhibitsaremarkablegreenemission at 570 nm (roomtemperature),whichisabovethelowestexcitedstate.Thecomplexischaracterizedby negativesolvatochromismas well as ahigh second-orderpolarizability.Additionof AgIionsinduces1) hypsochromicshiftof the lowestfrequenciesand 2) reversible quenchingof luminescence. The corresponding Ni andPd complexeshavealso beenprepared and investigatedto assistinterpre-tationof opticalproperties withinthe triad.Computationalstudies basedon DFT and time-dependent DFT highlighttheelectronicpropertiesof [Pt(iPr2pipdt)(Quinoxdt)].The prefer-entialsite of interaction between the Pt complex and incom-ingAgIisevidencedbytheshapeoftheFukuifunctions,pointingtothe thiolicsulfurandplatinumatomsas themostreactivesitestowardsasoft cation.Calculatedopticalproperties are in agreementwithexperimental findings. Thisstudyshedslighton the structure–property relationship forthis classof compounds.

Uncommon Optical Properties and Silver-responsive Turn-off/on Luminescence in a Pt(II) heteroleptic dithiolene complex / S.S. Attar, F. Artizzu, L. Marchiò, D. Espa, L. Pilia, M.F. Casula, A. Serpe, M. Pizzotti, A. Orbelli Biroli, P. Deplano. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - 24:41(2018 Jul 20), pp. 10503-10512.

Uncommon Optical Properties and Silver-responsive Turn-off/on Luminescence in a Pt(II) heteroleptic dithiolene complex

M. Pizzotti
Membro del Collaboration Group
;
A. Orbelli Biroli
Penultimo
Membro del Collaboration Group
;
2018-07-20

Abstract

.
Complex [Pt(iPr2pipdt)(Quinoxdt)](iPr2pipdt=1,4-diisopropyl-piperazine-2,3-dithione;Quinoxdt=[1,4]dithii-no[2,3-b]quinoxaline-2,3-dithiolate) exhibitsaremarkablegreenemission at 570 nm (roomtemperature),whichisabovethelowestexcitedstate.Thecomplexischaracterizedby negativesolvatochromismas well as ahigh second-orderpolarizability.Additionof AgIionsinduces1) hypsochromicshiftof the lowestfrequenciesand 2) reversible quenchingof luminescence. The corresponding Ni andPd complexeshavealso beenprepared and investigatedto assistinterpre-tationof opticalproperties withinthe triad.Computationalstudies basedon DFT and time-dependent DFT highlighttheelectronicpropertiesof [Pt(iPr2pipdt)(Quinoxdt)].The prefer-entialsite of interaction between the Pt complex and incom-ingAgIisevidencedbytheshapeoftheFukuifunctions,pointingtothe thiolicsulfurandplatinumatomsas themostreactivesitestowardsasoft cation.Calculatedopticalproperties are in agreementwithexperimental findings. Thisstudyshedslighton the structure–property relationship forthis classof compounds.
Dithiolenes; optical properties; crystal structure
Settore CHIM/03 - Chimica Generale e Inorganica
16-mag-2018
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/578388
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