1
|
Kleine A, Schubert US, Jäger M. Exploiting Orthogonal C-C Cross-Coupling Reactions for Chemistry-on-the-Complex: Modular Assembly of 2,6-Di(quinolin-8-yl)pyridine Ruthenium(II) Photosensitizer Triads. Inorg Chem 2024; 63:4053-4062. [PMID: 38373324 PMCID: PMC10915800 DOI: 10.1021/acs.inorgchem.3c03380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/12/2024] [Accepted: 01/17/2024] [Indexed: 02/21/2024]
Abstract
In this work, we present a concise modular assembly strategy using one universal heteroleptic 2,6-di(quinolin-8-yl)pyridine-based ruthenium(II) complex as a starting building block. Extending the concept from established ligand modifications and subsequent complexation (classical route), the later appearing chemistry-on-the-complex methodology was used for late-stage syntheses, i.e., assembling discrete building blocks to molecular architectures (here: dyad and triads). We focused on Suzuki-Miyaura and Sonogashira cross-couplings as two of the best-known C-C bond forming reactions. Both were performed on one building block complex bearing a bromine and TIPS-protected alkyne for functional group interconversion (bromine to TMS-protected alkyne, a benzyl azide, or a boronic acid pinacol ester moiety with ≥95% isolated yield and simple purification) as well as building block assemblies using both a triarylamine-based donor and a naphthalene diimide-based acceptor in up to 86% isolated yield. Additionally, the developed purification via automated flash chromatography is simple compared to tedious manual chromatography for ruthenium(II)-based substrates in the classical route. Based on the preliminary characterization by steady-state spectroscopy, the observed emission quenching in the triad (55%) serves as an entry to rationally optimize the modular units via chemistry-on-the-complex to elucidate energy and electron transfer.
Collapse
Affiliation(s)
- Alexander Kleine
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, 07743 Jena, Germany
| | - Ulrich S. Schubert
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, 07743 Jena, Germany
- Center
for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| | - Michael Jäger
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstr. 10, 07743 Jena, Germany
- Center
for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
| |
Collapse
|
2
|
Bürgin T, Ogawa T, Wenger OS. Better Covalent Connection in a Molecular Triad Enables More Efficient Photochemical Energy Storage. Inorg Chem 2023; 62:13597-13607. [PMID: 37562775 PMCID: PMC10445269 DOI: 10.1021/acs.inorgchem.3c02008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Indexed: 08/12/2023]
Abstract
Numerous studies have explored the kinetics of light-induced charge separation and thermal charge recombination in donor-acceptor compounds, but quantum efficiencies have rarely been investigated. Here, we report on two essentially isomeric molecular triads, both comprising a π-extended tetrathiafulvalene (ExTTF) donor, a ruthenium(II)-based photosensitizer, and a naphthalene diimide (NDI) acceptor. The key difference between the two triads is how the NDI acceptor is connected. Linkage at the NDI core provides stronger electronic coupling to the other molecular components than connection via the nitrogen atoms of NDI. This change in molecular connectivity is expected to accelerate both energy-storing charge separation and energy-wasting charge recombination processes, but it is not a priori clear how this will affect the triad's ability to store photochemical energy; any gain resulting from faster charge separation could potentially be (over)compensated by losses through accelerated charge recombination. The new key insight emerging from our study is that the quantum yield for the formation of a long-lived charge-separated state increases by a factor of 5 when going from nitrogen- to core-connected NDI, providing the important proof of concept that better molecular connectivity indeed enables more efficient photochemical energy storage. The physical origin of this behavior seems to root in different orbital connectivity pathways for charge separation and charge recombination, as well as in differences in the relevant orbital interactions depending on NDI connection. Our work provides guidelines for how to discriminate between energy-storing and energy-wasting electron transfer reactions in order to improve the quantum yields for photochemical energy storage and solar energy conversion.
Collapse
Affiliation(s)
- Tobias
H. Bürgin
- Department
of Chemistry, University of Basel, St. Johanns-Ring 19, Basel 4056, Switzerland
| | - Tomohiro Ogawa
- Department
of Chemistry, University of Basel, St. Johanns-Ring 19, Basel 4056, Switzerland
- Graduate
School of Science and Engineering, University
of Toyama, Toyama 930-8555, Japan
| | - Oliver S. Wenger
- Department
of Chemistry, University of Basel, St. Johanns-Ring 19, Basel 4056, Switzerland
| |
Collapse
|
3
|
Synthesis of a Ru(II) Complex with a Naphthoquinone-Annelated Imidazole Ligand Exhibiting Proton-Responsive Redox and Luminescent Behavior. INORGANICS 2021. [DOI: 10.3390/inorganics9040024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A mononuclear ruthenium complex, [RuII(L)(bpy)2](PF6), with a naphthoquinone-annelated imidazole ligand HL (2-(pyridin-2-yl)-1H-naphtho[2,3-d]imidazole-4,9-dione) was synthesized and structurally characterized. Electrochemical study reveals that the Ru complex shows four reversible redox waves at +0.98 V, −1.13 V, −1.53 V, and −1.71 V versus SCE in acetonitrile, which are assigned to Ru(II)/Ru(III), L−/L•2−, and two bpy/bpy•− redox couples, respectively. The redox potential of Ru(II)/Ru(III) was positively shifted upon the addition of trifluoromethanesulfonic acid due to protonation of the L− moiety, leading to stabilization of the Ru 4d orbital. In UV-vis absorption measurements for the Ru complex in acetonitrile, a metal-to-ligand charge transfer (MLCT) band was observed at 476 nm, which was shifted to 450 nm by protonation, which might be due to a decrease in the electron delocalization and stabilization of the π orbitals in L−. The blue shift of the MLCT band by protonation was associated with a shift of an emission band from 774 nm to 620 nm, which could be caused by the decreased electronic delocalization in the MLCT excited state. These electrochemical and spectroscopic changes were reversible for the protonation/deprotonation stimuli.
Collapse
|
4
|
Hao S, Yang J, Liu P, Xu J, Yang C, Li F. Linear-Organic-Polymer-Supported Iridium Complex as a Recyclable Auto-Tandem Catalyst for the Synthesis of Quinazolinones via Selective Hydration/Acceptorless Dehydrogenative Coupling from o-Aminobenzonitriles. Org Lett 2021; 23:2553-2558. [PMID: 33729807 DOI: 10.1021/acs.orglett.1c00475] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A linear-organic-polymer-supported iridium complex Cp*Ir@P4VP, which is designed and synthesized by the coordinative immobilization of [Cp*IrCl2]2 on poly(4-vinylpyridine), was proven to be an efficient heterogeneous autotandem catalyst for synthesizing quinazolinones via selective hydration/acceptorless dehydrogenative coupling from o-aminobenzonitriles. Furthermore, the synthesized catalyst was recycled five times without an obvious decrease in the catalytic activity.
Collapse
Affiliation(s)
- Shushu Hao
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Jiazhi Yang
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Peng Liu
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Jing Xu
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Chenchen Yang
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| | - Feng Li
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China
| |
Collapse
|
5
|
Jiménez J, Poncet M, Míguez‐Lago S, Grass S, Lacour J, Besnard C, Cuerva JM, Campaña AG, Piguet C. Bright Long‐Lived Circularly Polarized Luminescence in Chiral Chromium(III) Complexes. Angew Chem Int Ed Engl 2021; 60:10095-10102. [DOI: 10.1002/anie.202101158] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Juan‐Ramón Jiménez
- Department of Inorganic and Analytical Chemistry University of Geneva quai E. Ansermet 30 1211 Geneva 4 Switzerland
| | - Maxime Poncet
- Department of Inorganic and Analytical Chemistry University of Geneva quai E. Ansermet 30 1211 Geneva 4 Switzerland
| | - Sandra Míguez‐Lago
- Department of Organic Chemistry University of Granada, Unidad de Excelencia de Química (UEQ) Avda. Fuentenueva 18071 Granada Spain
| | - Stéphane Grass
- Department of Organic Chemistry University of Geneva quai E. Ansermet 30 1211 Geneva 4 Switzerland
| | - Jérôme Lacour
- Department of Organic Chemistry University of Geneva quai E. Ansermet 30 1211 Geneva 4 Switzerland
| | - Céline Besnard
- Laboratory of Crystallography University of Geneva quai E. Ansermet 24 1211 Geneva 4 Switzerland
| | - Juan M. Cuerva
- Department of Organic Chemistry University of Granada, Unidad de Excelencia de Química (UEQ) Avda. Fuentenueva 18071 Granada Spain
| | - Araceli G. Campaña
- Department of Organic Chemistry University of Granada, Unidad de Excelencia de Química (UEQ) Avda. Fuentenueva 18071 Granada Spain
| | - Claude Piguet
- Department of Inorganic and Analytical Chemistry University of Geneva quai E. Ansermet 30 1211 Geneva 4 Switzerland
| |
Collapse
|
6
|
Jiménez J, Poncet M, Míguez‐Lago S, Grass S, Lacour J, Besnard C, Cuerva JM, Campaña AG, Piguet C. Bright Long‐Lived Circularly Polarized Luminescence in Chiral Chromium(III) Complexes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101158] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Juan‐Ramón Jiménez
- Department of Inorganic and Analytical Chemistry University of Geneva quai E. Ansermet 30 1211 Geneva 4 Switzerland
| | - Maxime Poncet
- Department of Inorganic and Analytical Chemistry University of Geneva quai E. Ansermet 30 1211 Geneva 4 Switzerland
| | - Sandra Míguez‐Lago
- Department of Organic Chemistry University of Granada, Unidad de Excelencia de Química (UEQ) Avda. Fuentenueva 18071 Granada Spain
| | - Stéphane Grass
- Department of Organic Chemistry University of Geneva quai E. Ansermet 30 1211 Geneva 4 Switzerland
| | - Jérôme Lacour
- Department of Organic Chemistry University of Geneva quai E. Ansermet 30 1211 Geneva 4 Switzerland
| | - Céline Besnard
- Laboratory of Crystallography University of Geneva quai E. Ansermet 24 1211 Geneva 4 Switzerland
| | - Juan M. Cuerva
- Department of Organic Chemistry University of Granada, Unidad de Excelencia de Química (UEQ) Avda. Fuentenueva 18071 Granada Spain
| | - Araceli G. Campaña
- Department of Organic Chemistry University of Granada, Unidad de Excelencia de Química (UEQ) Avda. Fuentenueva 18071 Granada Spain
| | - Claude Piguet
- Department of Inorganic and Analytical Chemistry University of Geneva quai E. Ansermet 30 1211 Geneva 4 Switzerland
| |
Collapse
|
7
|
Liu ZN, He CX, Yin HJ, Yu SW, Xu JB, Dong JW, Liu Y, Xia SB, Cheng FX. Novel Ru(II)/Os(II)‐Exchange Homo‐ and Heterometallic Polypyridyl Complexes with Effective Energy Transfer. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000937] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zi Ning Liu
- College of Chemistry and Environment Science Qujing Normal University 655011 Qujing P. R. China
| | - Chi Xian He
- College of Chemistry and Environment Science Qujing Normal University 655011 Qujing P. R. China
| | - Hong Ju Yin
- College of Chemistry and Environment Science Qujing Normal University 655011 Qujing P. R. China
| | - Shi Wen Yu
- College of Chemistry and Environment Science Qujing Normal University 655011 Qujing P. R. China
| | - Jian Bin Xu
- College of Chemistry and Environment Science Qujing Normal University 655011 Qujing P. R. China
| | - Jian Wei Dong
- College of Chemistry and Environment Science Qujing Normal University 655011 Qujing P. R. China
| | - Yan Liu
- College of Chemistry and Environment Science Qujing Normal University 655011 Qujing P. R. China
| | - Shu Biao Xia
- College of Chemistry and Environment Science Qujing Normal University 655011 Qujing P. R. China
| | - Fei Xiang Cheng
- College of Chemistry and Environment Science Qujing Normal University 655011 Qujing P. R. China
| |
Collapse
|