1
|
Colombo A, De Soricellis G, Fagnani F, Dragonetti C, Cocchi M, Carboni B, Guerchais V, Marinotto D. Introduction of a triphenylamine substituent on pyridyl rings as a springboard for a new appealing brightly luminescent 1,3-di-(2-pyridyl)benzene platinum(II) complex family. Dalton Trans 2022; 51:12161-12169. [PMID: 35876615 DOI: 10.1039/d2dt01792j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The preparation and characterization of three new complexes, namely [Pt(1,3-bis(4-triphenylamine-pyridin-2-yl)-4,6-difluoro-benzene)Cl] ([PtL1Cl]), [Pt(1,3-bis(4-triphenylamine-pyridin-2-yl)-5-triphenylamine-benzene)Cl] ([PtL2Cl]), and [Pt(1,3-bis(4-triphenylamine-pyridin-2-yl)-5-mesityl-benzene)Cl] ([PtL3Cl]), is reported. All of them are highly luminescent in dilute deaerated dichloromethane solution (Φlum = 0.88-0.90, in the yellow-green region; the λmax,em in nm for the monomers are: 562, 561 and 549 for [PtL1Cl], [PtL2Cl] and [PtL3Cl], respectively).[PtL1Cl] is the most appealing, being characterized by a very long lifetime (103.9 μs) and displaying intense NIR emission in concentrated deaerated solution (Φlum = 0.66) with essentially no "contamination" by visible light < 600 nm. This complex allows the fabrication of both yellow-green and deep red/NIR OLEDs; OLED emissions are in the yellow-green (CIE = 0.38, 0.56) and deep red/NIR (CIE = 0.65, 0,34) regions, for [PtL1Cl] 8 wt% (with 11% ph/e EQE) and pure [PtL1Cl] (with 4.3% ph/e EQE), respectively.
Collapse
Affiliation(s)
- Alessia Colombo
- Dipartimento di Chimica, Università degli Studi di Milano, UdR INSTM di Milano, via C. Golgi 19, 20133 Milan, Italy.
| | - Giulia De Soricellis
- Dipartimento di Chimica, Università degli Studi di Milano, UdR INSTM di Milano, via C. Golgi 19, 20133 Milan, Italy.
| | - Francesco Fagnani
- Dipartimento di Chimica, Università degli Studi di Milano, UdR INSTM di Milano, via C. Golgi 19, 20133 Milan, Italy.
| | - Claudia Dragonetti
- Dipartimento di Chimica, Università degli Studi di Milano, UdR INSTM di Milano, via C. Golgi 19, 20133 Milan, Italy.
| | - Massimo Cocchi
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), via P. Gobetti 101, 40129 Bologna, Italy
| | - Bertrand Carboni
- Université de Rennes 1, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Véronique Guerchais
- Université de Rennes 1, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Daniele Marinotto
- Istituto di Scienze e Tecnologie Chimiche (SCITEC) "Giulio Natta", Consiglio Nazionale delle Ricerche (CNR), via C. Golgi 19, 20133 Milan, Italy
| |
Collapse
|
2
|
Artizzu F, Espa D, Marchiò L, Pilia L, Serpe A, Deplano P. Progress and perspectives on strategies to control photochemical properties in Metallo-Dithiolene Donor-Acceptor systems. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
3
|
|
4
|
Attar SS, Pilia L, Espa D, Artizzu F, Serpe A, Pizzotti M, Marinotto D, Marchiò L, Deplano P. Insight into the Properties of Heteroleptic Metal Dithiolenes: Multistimuli Responsive Luminescence, Chromism, and Nonlinear Optics. Inorg Chem 2021; 60:9332-9344. [PMID: 34115489 DOI: 10.1021/acs.inorgchem.1c00023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A comprehensive investigation of the functional properties of heteroleptic donor-M-acceptor dithiolene complexes Bu4N[MII(L1)(L2)] is presented (M = Pd, Pt). The acceptor L1 consists of the chiral (R)-(+)α-methylbenzyldithiooxamidate ((R)-α-MBAdto), the donor L2 is 2-thioxo-1,3-dithiole-4,5-dithiolato (dmit) in 1 (Pd) and 2 (Pt), 1,2-dicarbomethoxyethylenedithiolate (ddmet) in 3 (Pd) and 4 (Pt), or [4',5':5,6][1,4]dithiino[2,3-b]quinoxaline-1',3'-dithiolato (quinoxdt) in 5 (Pd) and 6 (Pt). L1 is capable of undergoing proton exchange and promoting crystal formation in noncentrosymmetric space groups. L2 has different molecular structures while it maintains similar electron-donating capabilities. Thanks to the synergy of the ligands, 1-6 behave as H+ and Ag+ switchable linear chromophores. Moreover, the compounds exhibit a H+-switchable second-order NLO response in solution, which is maintained in the bulk for 1, 3, and 4 when they are embedded into a PMMA poled matrix. 5 and 6 show unique anti-Kasha H+ and Ag+ tunable colored emission originating from the quinoxdt ligand. A correlation between the electronic structure and properties is shown through density functional theory (DFT) and time-dependent DFT calculations.
Collapse
Affiliation(s)
- Salahuddin S Attar
- Department of Chemical and Soil Sciences, INSTM Research Unit, University of Cagliari, 09042 Monserrato, Cagliari, Italy
| | - Luca Pilia
- Dipartimento di Ingegneria Meccanica, Chimica e dei Materiali, Università di Cagliari, Via Marengo 2, 09123 Cagliari, Italy
| | - Davide Espa
- Department of Chemical and Soil Sciences, INSTM Research Unit, University of Cagliari, 09042 Monserrato, Cagliari, Italy
| | - Flavia Artizzu
- L3-Luminescent Lanthanide Lab, Department of Chemistry, Ghent University Krijgslaan 281, Building S3, B-9000 Gent, Belgium
| | - Angela Serpe
- Dipartimento di Ingegneria Civile, Ambientale e Architettura, INSTM Research Unit, Università di Cagliari, Via Marengo 2, 09123 Cagliari, Italy
| | - Maddalena Pizzotti
- Department of Chemistry, INSTM Research Unit, University of Milan Via C. Golgi 19, 20133 Milano, Italy
| | - Daniele Marinotto
- CNR-SCITEC, Centro di eccellenza CIMAINA, Via C. Golgi 19, 20133 Milano, Italy
| | - Luciano Marchiò
- Dipartimento SCVSA, Università di Parma, Parco Area delle Scienze 17/a, 43124 Parma, Italy
| | - Paola Deplano
- Department of Chemical and Soil Sciences, INSTM Research Unit, University of Cagliari, 09042 Monserrato, Cagliari, Italy
| |
Collapse
|
5
|
Krause M, von der Stück R, Brünink D, Buss S, Doltsinis NL, Strassert CA, Klein A. Platinum and palladium complexes of tridentate −C^N^N (phen-ide)-pyridine-thiazol ligands – A case study involving spectroelectrochemistry, photoluminescence spectroscopy and TD-DFT calculations. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120093] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
6
|
Gazzetto M, Artizzu F, Attar SS, Marchiò L, Pilia L, Rohwer EJ, Feurer T, Deplano P, Cannizzo A. Anti-Kasha Conformational Photoisomerization of a Heteroleptic Dithiolene Metal Complex Revealed by Ultrafast Spectroscopy. J Phys Chem A 2020; 124:10687-10693. [PMID: 33320003 DOI: 10.1021/acs.jpca.0c07794] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We investigated the anti-Kasha photochemistry and anti-Kasha emission of d8-metal donor-acceptor dithiolene with femtosecond UV-vis transient absorption spectroscopy and molecular modeling. Experimentally, we found a lifetime of 1.4 ps for higher excited states, which is exceptionally long when compared to typical values for internal conversion (IC) (10 s of fs or less). Consequently, a substantial emission originates from the second excited state. Molecular modeling suggests this to be a consequence of the spatially separated molecular orbitals of the first and second excited states, which gives a charge transfer character to the IC. More surprisingly, we found that the inherent flexibility of the molecule allows the metal complex to access different configurations depending on the photoexcited state. We believe that this unique manifestation of anti-Kasha photoinduced conformational isomerization is facilitated by the exceptionally long lifetime of the second excited state.
Collapse
Affiliation(s)
- Michela Gazzetto
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - Flavia Artizzu
- L3-Luminescent Lanthanide Lab, Department of Chemistry, Ghent University, Krijgslaan 281-Building S3, B-9000 Gent, Belgium
| | - Salahuddin S Attar
- Department of Chemical and Soil Sciences, University of Cagliari, 09042 Monserrato, Cagliari, Italy
| | - Luciano Marchiò
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 17/a, 43124 Parma, Italy
| | - Luca Pilia
- Dipartimento di Ingegneria Meccanica, Chimica e dei Materiali, Università di Cagliari, Via Marengo 2, 09123 Cagliari, Italy
| | - Egmont J Rohwer
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - Thomas Feurer
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - Paola Deplano
- Department of Chemical and Soil Sciences, University of Cagliari, 09042 Monserrato, Cagliari, Italy
| | - Andrea Cannizzo
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| |
Collapse
|
7
|
Basu P, Colston KJ, Mogesa B. Dithione, the antipodal redox partner of ene-1,2-dithiol ligands and their metal complexes. Coord Chem Rev 2020; 409:213211. [PMID: 38094102 PMCID: PMC10718511 DOI: 10.1016/j.ccr.2020.213211] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Defining the oxidation state of the central atom in a coordination compound is fundamental in understanding the electronic structure and provides a starting point for elucidating molecular properties. The presence of non-innocent ligand(s) can obscure the oxidation state of the central atom as the ligand contribution to the electronic structure is difficult to ascertain. Redox-active ligands, such as dithiolene ligands, are well known non-innocent ligands that can exist in both a fully reduced (Dt2-) and fully oxidized (Dt0) states. Complexes containing the fully oxidized dithione state of the ligand are uncommon and only a few have been completely characterized. Dithione ligands are of interest due to their electron-deficient nature and ability to act as an electron acceptor for more electron-rich moieties, such as other dithiolene ligands or metal centers. This article focuses the syntheses, structures, and metal coordination, particularly coordination compounds, of dithione ligands. Various examples of mono, bis, and tris dithione complexes are discussed.
Collapse
Affiliation(s)
- Partha Basu
- Department of Chemistry and Chemical Biology, IUPUI, Indianapolis, IN 46202, United States
| | - Kyle J. Colston
- Department of Chemistry and Chemical Biology, IUPUI, Indianapolis, IN 46202, United States
| | - Benjamin Mogesa
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA 15282, United States
| |
Collapse
|
8
|
Attar SS, Marchiò L, Pilia L, Casula MF, Espa D, Serpe A, Pizzotti M, Marinotto D, Deplano P. Design of nickel donor–acceptor dithiolenes for 2nd order nonlinear optics: an experimental and computational study. NEW J CHEM 2019. [DOI: 10.1039/c9nj02976a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study, concerning the influence on the NLO properties of a remote functionality in the donor of D–Ni–A dithiolenes 1–4, allows to point out the relationship between NLO properties and the donor capability in modulating the low-energy absorption.
Collapse
Affiliation(s)
- Salahuddin S. Attar
- Texas A&M University at Qatar (TAMUQ)
- Texas A&M Engineering Building
- Education City
- Doha
- Qatar
| | - Luciano Marchiò
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale
- Università di Parma
- Parma
- Italy
| | - Luca Pilia
- Dipartimento di Ingegneria Meccanica
- Chimica e dei Materiali
- Università di Cagliari
- Cagliari
- Italy
| | - Maria F. Casula
- Dipartimento di Ingegneria Meccanica
- Chimica e dei Materiali
- Università di Cagliari
- Cagliari
- Italy
| | - Davide Espa
- Dipartimento di Fisica
- INSTM Research Unit
- Università di Cagliari
- Monserrato
- Italy
| | - Angela Serpe
- Dipartimento di Ingegneria Civile
- Ambientale e Archittetura
- Università di Cagliari
- Cagliari
- Italy
| | - Maddalena Pizzotti
- Department of Chemistry
- INSTM Research Unit
- University of Milan
- 20133 Milano
- Italy
| | - Daniele Marinotto
- ISTM-CNR
- Centro CIMAINA dell’Università degli Studi di Milano e UdR dell'INSTM
- 20133 Milano
- Italy
| | - Paola Deplano
- Dipartimento di Fisica
- INSTM Research Unit
- Università di Cagliari
- Monserrato
- Italy
| |
Collapse
|