1
|
Schlachter A, Juvenal F, Kinghat Tangou R, Khatyr A, Guyon F, Karsenti PL, Strohmann C, Kubicki MM, Rousselin Y, Harvey PD, Knorr M. 2-Azabutadiene complexes of rhenium(I): S, N-chelated species with photophysical properties heavily governed by the ligand hidden traits. Dalton Trans 2021; 50:2945-2963. [PMID: 33564810 DOI: 10.1039/d0dt04183a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of [Re(CO)3(THF)(μ-Br)]2 or [Re(CO)5X] (X = Cl, Br, I) with the diaryl-2-azabutadienes [(RS)2C[double bond, length as m-dash]C(H)-N[double bond, length as m-dash]CAr2] containing two thioether arms at the 4,4-position forms the luminescent S,N-chelate complexes fac-[(OC)3ReX{(RS)2C[double bond, length as m-dash]C(H)-N[double bond, length as m-dash]CAr2}] (1a-h). The halide abstraction by silver triflate converts [(OC)3ReCl{(PhS)2C[double bond, length as m-dash]C(H)-N[double bond, length as m-dash]CPh2}] (1c) to [(OC)3Re(OS([double bond, length as m-dash]O)2CF3){(PhS)2C[double bond, length as m-dash]C(H)-N[double bond, length as m-dash]CPh2}] (1j) bearing a covalently bound triflate ligand. The cyclic voltammograms reveal reversible S^N ligand-centred reduction and irreversible oxidation waves for all complexes. The crystal structures of nine octahedral complexes have been determined along with that of (NaphtylS)2C[double bond, length as m-dash]C(H)-N[double bond, length as m-dash]CPh2 (L6). A rich system of weak non-covalent intermolecular secondary interactions through CHX(Cl, Br)Re, CHO, COπ(Ph), CHπCO, CHO and CHS contacts has been evidenced. The photophysical properties have been investigated by steady-state and time-resolved absorption (fs transient absorption, fs-TAS) and emission (ns-TCSPC and ps-Streak camera) spectroscopy in 2-MeTHF solution at 298 and 77 K. The emission bands are composed of either singlet (450 < λmax < 535 nm) and/or triplet emissions (at 77 K only, λmax < 640 nm, or appearing as a tail at λ > 600 nm), which decay in a multiexponential manner for the fluorescence (short ps (i.e. <IRF) < τF < 1.9 ns at 298 and 77 K) and monoexponentially for the phosphorescence (4.0 < τP < 7.0 ns at 77 K). The fs-TAS data reveal the presence of 2 to 4 transient species decaying in four narrow time windows (generally 125-165 fs, 370-685 fs, 3-6 ps, 30-45 ps). The complexity of these kinetics was explained by studying the photophysical behaviour of ligand L6. Its behaviour is the same as the complexes thus indicating that the ligand dictates the kinetic traits of the Re-species, except for the triplet emission as L6 is not phosphorescent. The triplet lifetime (4.0 < τP < 7.0 ns) is considered very short but not unprecedented. Furthermore, the nature of the lowest energy excited states of these chelate compounds and L6 has been addressed using DFT and TDDFT calculations and been assigned to metal-to-ligand (MLCT) and/or intraligand charge-transfer (ILCT).
Collapse
Affiliation(s)
- Adrien Schlachter
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1 K 2R1
| | - Frank Juvenal
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1 K 2R1
| | | | - Abderrahim Khatyr
- Institut UTINAM, UMR CNRS 6213, Université Bourgogne Franche-Comté, 25030 Besançon, France.
| | - Fabrice Guyon
- Institut UTINAM, UMR CNRS 6213, Université Bourgogne Franche-Comté, 25030 Besançon, France.
| | - Paul-Ludovic Karsenti
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1 K 2R1
| | - Carsten Strohmann
- Anorganische Chemie, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Marek M Kubicki
- Institut de Chimie Moléculaire UMR 5260, Université Bourgogne Franche-Comté, 21078 Dijon, France
| | - Yoann Rousselin
- Institut de Chimie Moléculaire UMR 5260, Université Bourgogne Franche-Comté, 21078 Dijon, France
| | - Pierre D Harvey
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1 K 2R1
| | - Michael Knorr
- Institut UTINAM, UMR CNRS 6213, Université Bourgogne Franche-Comté, 25030 Besançon, France.
| |
Collapse
|
2
|
1,3-Dipolar cycloaddition of diaryldiazomethanes across N-ethoxy-carbonyl-N-(2,2,2-trichloroethylidene)amine and reactivity of the resulting 2-azabutadienes towards thiolates and cyclic amides. CR CHIM 2016. [DOI: 10.1016/j.crci.2015.09.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
3
|
Mancebo-Aracil J, Muñoz-Guillena MJ, Such-Basáñez I, Sansano-Gil JM. Kinetic Study of Thermal 1,3-Dipolar Cycloaddition of Azomethine Ylides by Using Differential Scanning Calorimetry. Chempluschem 2012. [DOI: 10.1002/cplu.201200107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
6
|
Clément S, Guyard L, Knorr M, Villafañe F, Strohmann C, Kubicki MM. (2,2‐Dibromovinyl)ferrocene as a Building Block for the Assembly of Heterodinuclear Complexes – Preparation of an σ‐Alkenylpalladium Complex and Dimetallic Dithioether Complexes. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200700470] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sébastien Clément
- Institut UTINAM UMR CNRS 6213, Université de Franche‐Comté, Faculté des Sciences, 16, Route de Grey, 25030 Besançon Cedex, France, Fax: +33‐3‐81666438
| | - Laurent Guyard
- Institut UTINAM UMR CNRS 6213, Université de Franche‐Comté, Faculté des Sciences, 16, Route de Grey, 25030 Besançon Cedex, France, Fax: +33‐3‐81666438
| | - Michael Knorr
- Institut UTINAM UMR CNRS 6213, Université de Franche‐Comté, Faculté des Sciences, 16, Route de Grey, 25030 Besançon Cedex, France, Fax: +33‐3‐81666438
| | - Fernando Villafañe
- IUCINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47005 Valladolid, Spain
| | - Carsten Strohmann
- Institut für Anorganische Chemie der Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Marek M. Kubicki
- Institut de Chimie Moléculaire UMR CNRS 5260, Université de Bourgogne, 9, Avenue Alain Savary, 21078 Dijon, France
| |
Collapse
|
7
|
Riu A, Harrison-Marchand A, Maddaluno J, Gulea M, Albadri H, Masson S. A Domino Knoevenagel/1,6-Heteroelectrocyclization Sequence to Access Phosphono-2H-thiopyrans. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700422] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|