1
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Móran Plata MJ, Marretta L, Gaztelumendi L, Pieslinger GE, Carballo RR, Rezabal E, Barone G, Martínez-Martínez V, Terenzi A, Salassa L. Alloxazine-Based Ligands and Their Ruthenium Complexes as NADH Oxidation Catalysts and G4 Binders. Inorg Chem 2024. [PMID: 39151171 DOI: 10.1021/acs.inorgchem.4c02314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2024]
Abstract
Flavin-like ligands (L-1 and L-2) with extended π-conjugation were synthesized using microwave-assisted techniques. An N,N-chelating fragment was integrated into alloxazine units, providing binding sites for metal ions while retaining redox activity. The complexation capability of L-1 and L-2 with two prototypical Ru-scaffolds was examined to design Ru(II) complexes (M-1 and M-2), whose electronic properties were studied and compared with their corresponding ligands via absorption and emission spectroscopy, computational analysis (density functional theory (DFT) and time-dependent DFT (TD-DFT)), and cyclic voltammetry (CV). The ability of L-1 and M-1 to undergo alloxazine/isoalloxazine tautomerization was demonstrated to play a crucial role in the photocatalytic oxidation of NADH, including under green and red wavelengths. Moreover, the interaction of M-1 and M-2 with B-DNA and G-quadruplex structures was investigated. M-2 showed high stabilization of Kit1 and h-Telo oligonucleotides. Meanwhile, M-1 demonstrated switchable emissive properties with B-DNA and induced conformational changes in the h-Telo G-quadruplex structure.
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Affiliation(s)
- Maria Jesus Móran Plata
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
| | - Laura Marretta
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | - Lander Gaztelumendi
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
| | - German E Pieslinger
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- CONICET─Universidad de Buenos Aires, Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Buenos Aires 1113, Argentina
| | - Romina R Carballo
- CONICET─Universidad de Buenos Aires, Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Buenos Aires 1113, Argentina
| | - Elixabete Rezabal
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
| | - Giampaolo Barone
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | | | - Alessio Terenzi
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | - Luca Salassa
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao 48011, Spain
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2
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Ryland ES, Liu X, Kumar G, Raj SL, Xie ZL, Mengele AK, Fauth SS, Siewerth K, Dietzek-Ivanšić B, Rau S, Mulfort KL, Li X, Cordones AA. Site-specific electronic structure of covalently linked bimetallic dyads from nitrogen K-edge x-ray absorption spectroscopy. J Chem Phys 2024; 160:084307. [PMID: 38415835 DOI: 10.1063/5.0192809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 01/15/2024] [Indexed: 02/29/2024] Open
Abstract
A nitrogen K-edge x-ray absorption near-edge structure (XANES) survey is presented for tetrapyrido[3,2-a:2',3'-c:3″,2″-h:2‴,3‴-j]phenazine (tpphz)-bridged bimetallic assemblies that couple chromophore and catalyst transition metal complexes for light driven catalysis, as well as their individual molecular constituents. We demonstrate the high N site sensitivity of the N pre-edge XANES features, which are energetically well-separated for the phenazine bridge N atoms and for the individual metal-bound N atoms of the inner coordination sphere ligands. By comparison with the time-dependent density functional theory calculated spectra, we determine the origins of these distinguishable spectral features. We find that metal coordination generates large shifts toward higher energy for the metal-bound N atoms, with increasing shift for 3d < 4d < 5d metal bonding. This is attributed to increasing ligand-to-metal σ donation that increases the effective charge of the bound N atoms and stabilizes the N 1s core electrons. In contrast, the phenazine bridge N pre-edge peak is found at a lower energy due to stabilization of the low energy electron accepting orbital localized on the phenazine motif. While no sensitivity to ground state electronic coupling between the individual molecular subunits was observed, the spectra are sensitive to structural distortions of the tpphz bridge. These results demonstrate N K-edge XANES as a local probe of electronic structure in large bridging ligand motifs, able to distinctly investigate the ligand-centered orbitals involved in metal-to-ligand and ligand-to-ligand electron transfer following light absorption.
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Affiliation(s)
- Elizabeth S Ryland
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Xiaolin Liu
- University of Washington, Seattle, Washington 98195, USA
| | - Gaurav Kumar
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Sumana L Raj
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Zhu-Lin Xie
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Alexander K Mengele
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Sven S Fauth
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Kevin Siewerth
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Benjamin Dietzek-Ivanšić
- Leibniz Institute of Photonic Technology, Research Department Functional Interfaces, Albert-Einstein Straße 9, 07745 Jena, Germany and Friedrich Schiller University Jena, Institute of Physical Chemistry, Helmholtzweg 4, 07743 Jena, Germany
| | - Sven Rau
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Karen L Mulfort
- Division of Chemical Sciences and Engineering, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Xiaosong Li
- University of Washington, Seattle, Washington 98195, USA
| | - Amy A Cordones
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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3
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Müller C, Kaufmann M, Brandon MP, Cullen AA, Dietzek-Ivanšić B, Pryce MT. New Twist on the Light-Switch Effect: Controlling the Fate of Excited States with pH in a 4-Hydroxy-thiazol-extended Ruthenium(II) Dppz Complex. J Phys Chem A 2023; 127:10613-10620. [PMID: 38059354 DOI: 10.1021/acs.jpca.3c06179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
We present a pH-dependent study of the excited state dynamics of a novel Ru complex bearing a 4-hydroxy thiazol-substituted dppz (dipyridophenazine) ligand (RuTzOH) and its deprotonated form (RuTzO-). We combine steady-state and time-resolved absorption and emission spectroscopy with electrochemical investigations to characterize the excited state relaxation, which upon photoexcitation at 400 nm is determined by a multitude of initially populated MLCT states for both complexes. Subsequently, for RuTzOH, two long-lived excited states are populated, leading to dual emission from the complexes, a feature that vanishes upon deprotonation. Upon deprotonation, the electron density on the dppz moiety increases significantly, leading to rapid energy populating ligand-centered states and thus deactivating the initially excited MLCT states.
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Affiliation(s)
- Carolin Müller
- Computer Chemistry Center, Nägelsbachstraße 25, Friedrich-Alexander-University Erlangen-Nuremberg, 91052 Erlangen, Germany
| | - Martin Kaufmann
- School of Chemical Sciences, Dublin City University, D09 V209 Dublin, Ireland
| | - Michael P Brandon
- School of Chemical Sciences, Dublin City University, D09 V209 Dublin, Ireland
| | - Aoibhin A Cullen
- School of Chemical Sciences, Dublin City University, D09 V209 Dublin, Ireland
| | - Benjamin Dietzek-Ivanšić
- Friedrich Schiller University Jena, Institute of Physical Chemistry and Abbe Center of Photonics, Helmholtzweg 4, 07743 Jena, Germany
- Leibniz Institute of Photonic Technology, Research Department Functional Interfaces, Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Mary T Pryce
- School of Chemical Sciences, Dublin City University, D09 V209 Dublin, Ireland
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4
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Gimeno L, Queffelec C, Blart E, Pellegrin Y. Copper(I) Bis(diimine) Complexes with High Photooxidation Power: Reductive Quenching of the Excited State with a Benzimidazoline Sacrificial Donor. ACS OMEGA 2022; 7:13112-13119. [PMID: 35474762 PMCID: PMC9026092 DOI: 10.1021/acsomega.2c00531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
The reductive quenching of photoexcited photosensitizers is a very efficient way to achieve challenging reduction reactions. In this process, the excited photosensitizer is reduced by a sacrificial electron donor. This mechanism is rarely observed with copper(I) bis(diimine) complexes, which are nevertheless acknowledged as very promising photosensitizers. This is due to the fact that they are very poor photooxidants and prove unable to react with common donors once promoted in their excited state. In this article, we evidence the rare reductive quenching cycle with two specially designed copper(I) complexes. These complexes exhibit improved photooxidation power thanks to an optimized coordination sphere made of strongly π-accepting ligands. Reductive quenching of the excited state of the latter complexes with a classical benzimidazoline sacrificial donor is monitored, and reduced complexes are accumulated during prolonged photolysis. Trials to utilize the photogenerated reductive power are presented.
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5
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Isakov D, Schmid MA, Nauroozi D, Rau S, Tschierlei S. Prolonged Luminescence Lifetime of a Dual Emissive Ruthenium Dipyridophenazine-Type Complex in Aprotic and Protic Solvents. Inorg Chem 2021; 60:14002-14010. [PMID: 34495655 DOI: 10.1021/acs.inorgchem.1c01214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A recently reported ruthenium(II) complex bearing an extended dipyridophenazine ligand exhibits unusual long-lived dual emission at room temperature. In this study, the effect of the introduction of a methyl protecting group to the imidazole moiety of this ligand (L1, 11-methyl-11H-imidazo[4,5-i]dipyrido[3,2-a:2',3'-c]phenazine) on the photophysics of the respective ruthenium(II) complex [(tbbpy)2Ru(L1)]2+ (C1) is demonstrated by means of electrochemistry, UV/vis absorption and emission spectroscopy, as well as emission lifetime measurements, and transient absorption spectroscopy on the nanosecond time scale. At room temperature, C1 shows dual emission both in aprotic and in protic solvents with time constants of 1.1/34.2 and 1.2/8.4 μs, respectively. These lifetimes are assigned to the emission from 3MLCT and 3LC states. The introduction of the methyl group increases the lifetime of the 3LC state in C1 almost by a factor of 2 in acetonitrile solution compared to the previously reported compound. Accordingly, the newly introduced methyl group is described as a protecting group for the imidazole moiety of the heterocyclic ligand, which enables prolonged lifetimes of the dual emissive complex in protic solvents. The stabilization of the electronic structure is further underlined by the enhanced stability toward electrochemical reduction as evidenced by cyclic voltammetry.
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Affiliation(s)
- Dajana Isakov
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Marie-Ann Schmid
- Department of Energy Conversion, Institute of Physical and Theoretical Chemistry, Technische Universität Braunschweig, Gaußstraße 17, 38106 Braunschweig, Germany
| | - Djawed Nauroozi
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Sven Rau
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Stefanie Tschierlei
- Department of Energy Conversion, Institute of Physical and Theoretical Chemistry, Technische Universität Braunschweig, Gaußstraße 17, 38106 Braunschweig, Germany
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6
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Müller C, Isakov D, Rau S, Dietzek B. Influence of the Protonation State on the Excited-State Dynamics of Ruthenium(II) Complexes with Imidazole π-Extended Dipyridophenazine Ligands. J Phys Chem A 2021; 125:5911-5921. [PMID: 34190563 DOI: 10.1021/acs.jpca.1c03856] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Ruthenium(II) complexes, like [(tbbpy)2Ru(dppz)]2+ (Ru-dppz; tbbpy = 4,4'-di-tert-butyl-2,2'-bipyridine, dppz = dipyrido-[3,2-a:2',3'-c]phenazine), have emerged as suitable photosensitizers in photoredox catalysis. Since then, there has been ongoing interest in the design of π-extended Ru-dppz systems with red-shifted visible absorption maxima and sufficiently long-lived excited states independent of the solvent or pH value. Herein, we explore the photophysical properties of protonation isomers of the linearly π-extended [(tbbpy)2Ru(L)]2+-type complexes bearing a dppz ligand with directly fused imidazole (im) and methyl-imidazole units (mim) as L. Steady-state UV-vis absorption, resonance Raman, as well as time-resolved emission and transient absorption spectroscopy reveal that Ru-im and Ru-mim show desirable properties for the application in photocatalytic processes, i.e., strong visible absorbance and two long-lived excited states in the 3ILCT and 3MLCT manifold, at pH values between 3 and 12. However, protonation of the (methyl-)imidazole unit at pH ≤ 2 unit causes decreased excited-state lifetimes and an emission switch-off.
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Affiliation(s)
- Carolin Müller
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany.,Research Department Functional Interfaces, Leibniz Institute of Photonic Technology Jena, Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Dajana Isakov
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Sven Rau
- Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Benjamin Dietzek
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany.,Research Department Functional Interfaces, Leibniz Institute of Photonic Technology Jena, Albert-Einstein-Straße 9, 07745 Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Lessingstraße 8, 07743 Jena, Germany
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7
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Sutton JJ, Preston D, Traber P, Steinmetzer J, Wu X, Kayal S, Sun XZ, Crowley JD, George MW, Kupfer S, Gordon KC. Excited-State Switching in Rhenium(I) Bipyridyl Complexes with Donor-Donor and Donor-Acceptor Substituents. J Am Chem Soc 2021; 143:9082-9093. [PMID: 34111929 DOI: 10.1021/jacs.1c02755] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The optical properties of two Re(CO)3(bpy)Cl complexes in which the bpy is substituted with two donor (triphenylamine, TPA, ReTPA2) as well as both donor (TPA) and acceptor (benzothiadiazole, BTD, ReTPA-BTD) groups are presented. For ReTPA2 the absorption spectra show intense intraligand charge-transfer (ILCT) bands at 460 nm with small solvatochromic behavior; for ReTPA-BTD the ILCT transitions are weaker. These transitions are assigned as TPA → bpy transitions as supported by resonance Raman data and TDDFT calculations. The excited-state spectroscopy shows the presence of two emissive states for both complexes. The intensity of these emission signals is modulated by solvent. Time-resolved infrared spectroscopy definitively assigns the excited states present in CH2Cl2 to be MLCT in nature, and in MeCN the excited states are ILCT in nature. DFT calculations indicated this switching with solvent is governed by access to states controlled by spin-orbit coupling, which is sufficiently different in the two solvents, allowing to select out each of the charge-transfer states.
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Affiliation(s)
- Joshua J Sutton
- Department of Chemistry, University of Otago, Dunedin 9016, New Zealand.,MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6012, New Zealand
| | - Dan Preston
- Department of Chemistry, University of Otago, Dunedin 9016, New Zealand.,MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6012, New Zealand
| | - Philipp Traber
- Institute for Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - Johannes Steinmetzer
- Institute for Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - Xue Wu
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Surajit Kayal
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Xue-Z Sun
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - James D Crowley
- Department of Chemistry, University of Otago, Dunedin 9016, New Zealand.,MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6012, New Zealand
| | - Michael W George
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom.,Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, 199 Taikang East Road, Ningbo 315100 China
| | - Stephan Kupfer
- Institute for Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - Keith C Gordon
- Department of Chemistry, University of Otago, Dunedin 9016, New Zealand.,MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6012, New Zealand
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8
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Hniopek J, Müller C, Bocklitz T, Schmitt M, Dietzek B, Popp J. Kinetic-Model-Free Analysis of Transient Absorption Spectra Enabled by 2D Correlation Analysis. J Phys Chem Lett 2021; 12:4148-4153. [PMID: 33890789 DOI: 10.1021/acs.jpclett.1c00835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Here, we present, to the best of our knowledge for the first time, a systematic study of utilizing 2D correlation analysis in the field of femtosecond transient absorption (fs-TA) spectroscopy. We present that the application of 2D correlation spectroscopy (2DCOS) to fs-TA spectroscopy enables a model-free means to analyze excited state kinetics, which is demonstrated on the model system [(tbbpy)2Ru(dppz)]2+ in different solvents. We show that TA-2DCOS is able to determine the number of processes contributing to the time-resolved spectral changes in fs-TA data sets, as well as extract the spectral response of these components. Overall, the results show that TA-2DCOS leads to the same results as obtained with methods relying on global lifetime analysis or multivariate curve resolution but without the need to specify a predetermined kinetic model. The work presented therefore highlights the potential of TA-2DCOS as a model-free approach for analyzing fs-TA spectral data sets.
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Affiliation(s)
- Julian Hniopek
- Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
- Friedrich Schiller University Jena, Institute of Physical Chemistry, Helmholtzweg 4, 07743 Jena, Germany
- Friedrich Schiller University Jena, Abbe Center of Photonics, Albert-Einstein-Str. 6, 07745 Jena, Germany
| | - Carolin Müller
- Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
- Friedrich Schiller University Jena, Institute of Physical Chemistry, Helmholtzweg 4, 07743 Jena, Germany
| | - Thomas Bocklitz
- Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
- Friedrich Schiller University Jena, Institute of Physical Chemistry, Helmholtzweg 4, 07743 Jena, Germany
- Friedrich Schiller University Jena, Abbe Center of Photonics, Albert-Einstein-Str. 6, 07745 Jena, Germany
| | - Michael Schmitt
- Friedrich Schiller University Jena, Institute of Physical Chemistry, Helmholtzweg 4, 07743 Jena, Germany
- Friedrich Schiller University Jena, Abbe Center of Photonics, Albert-Einstein-Str. 6, 07745 Jena, Germany
| | - Benjamin Dietzek
- Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
- Friedrich Schiller University Jena, Institute of Physical Chemistry, Helmholtzweg 4, 07743 Jena, Germany
- Friedrich Schiller University Jena, Abbe Center of Photonics, Albert-Einstein-Str. 6, 07745 Jena, Germany
| | - Jürgen Popp
- Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
- Friedrich Schiller University Jena, Institute of Physical Chemistry, Helmholtzweg 4, 07743 Jena, Germany
- Friedrich Schiller University Jena, Abbe Center of Photonics, Albert-Einstein-Str. 6, 07745 Jena, Germany
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9
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Alrefai R, Hörner G, Schubert H, Berkefeld A. Broadly versus Barely Variable Complex Chromophores of Planar Nickel(II) from κ 3- N, N′, C and κ 3- N, N′, O Donor Platforms. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00121] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Riyadh Alrefai
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Gerald Hörner
- Anorganische Chemie IV, Universität Bayreuth, Universitätsstraße 30, 95440 Bayreuth, Germany
| | - Hartmut Schubert
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Andreas Berkefeld
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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10
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Aslan JM, Reardon MM, Alatrash N, Nastasi F, MacDonnell FM. Metal-Catalyzed Hydride Transfer from Alcohols to Photoexcited Dipyridophenazine †. Photochem Photobiol 2021; 98:42-48. [PMID: 33896014 DOI: 10.1111/php.13437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 04/19/2021] [Indexed: 11/28/2022]
Abstract
Dipyridophenazine (dppz) is known to react with alcohols upon photoexcitation into an n-π* transition at 378 nm to yield dihydrodipyridophenazine (dppzH2 ). This process occurs via H-atom abstraction from alcohols and subsequent disproportionation of the dppzH• radical species, to the final product. This reaction shows a primary kinetic isotope effect (KIE = 4.9) in methanol/perdeuteromethanol solvents, consistent with H-atom transfer processes. Addition of excess Zn(II) ions to the dppz solution not only accelerates the rate of photoreduction, but also lowers the KIE to 1.7, indicating a change in reaction mechanism. We postulate that the coordination of the alcoholic solvent to Zn(II) activates the alcohol α C-H bonds toward hydride transfer processes which would be consistent with the lowered KIE and faster overall reduction of the aromatic ligand. Interestingly, this appears to be an intramolecular process in which the Zn(II) is coordinated to both the dppz ligand and the reactive alcohol, as a sharp inflection in the overall rate increase is observed at a Zn:dppz ratio of 2:1. At this ratio, the dominant dppz species involves a Zn(II) bound to one dppz and several solvent molecules (methanol and water).
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Affiliation(s)
- Joseph M Aslan
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, TX
| | - Melissa M Reardon
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, TX
| | - Nagham Alatrash
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, TX
| | - Francesco Nastasi
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Messina, Italy
| | - Frederick M MacDonnell
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, TX
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11
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Larsen CB. Temperature and solvent-dependent photoluminescence quenching in [Ru(bpy) 2(bpy-cc-AQ)] 2. Phys Chem Chem Phys 2021; 23:3574-3580. [PMID: 33514966 DOI: 10.1039/d0cp05044j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
I have herein investigated the solvent-dependent photoluminescence quenching mechanism of [Ru(bpy)2(bpy-cc-AQ)]2+ using variable temperature emission spectroscopies. The photophysics of this complex are dominated by an excited-state thermal equilibrium between a photoluminescent 3MLCT state and a charge-separated state that lies higher in energy relative to the 3MLCT state in low polarity solvents and approximately isoenergetic in high polarity solvents. Furthermore, an unusual photoluminescence temperature-dependence in high polarity solvents is shown to arise from competition between enthalpic factors favouring the charge-separated state and entropic factors favouring the photoluminescent 3MLCT state, analogous to the molecular light-switch effect of [Ru(bpy)2(dppz)]2+. The solvent-dependent photoluminescence quenching of [Ru(bpy)2(bpy-cc-AQ)]2+ is attributed to two key solvent-dependent factors: (1) the excited-state equilibrium position and (2) the rate of charge-recombination from the charge-separated state.
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Affiliation(s)
- Christopher B Larsen
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Stanford University, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
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12
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Park SV, Fry CG, Bill E, Berry JF. A metastable Ru III azido complex with metallo-Staudinger reactivity. Chem Commun (Camb) 2020; 56:10738-10741. [PMID: 32789338 DOI: 10.1039/d0cc04426a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The metastable purple [(Py5Me2)RuIII(N3)]2+ ion reacts with PPh3 at room temperature to form the phosphinimine complex [(Py5Me2)RuII(N(H)PPh3)]2+ and free [H2NPPh3]+ in a combined 23% conversion. Mechanistic studies suggest that this is the first metallo-Staudinger reaction of a late transition metal that bypasses the nitrido mechanism and instead utilizes a Ru-N[double bond, length as m-dash]N[double bond, length as m-dash]N-PPh3 phosphazide intermediate.
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Affiliation(s)
- Sungho V Park
- Department of Chemistry, University of Wisconsin - Madison, 1101 University Avenue, Madison, Wisconsin 53706, USA.
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13
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García-López V, Zalibera M, Trapp N, Kuss-Petermann M, Wenger OS, Diederich F. Stimuli-Responsive Resorcin[4]arene Cavitands: Toward Visible-Light-Activated Molecular Grippers. Chemistry 2020; 26:11451-11461. [PMID: 32780914 DOI: 10.1002/chem.202001788] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/14/2020] [Indexed: 01/14/2023]
Abstract
Resorcin[4]arene cavitands, equipped with diverse quinone (Q) and [Ru(bpy)2 dppz]2+ (bpy=2,2'-bipyridine, dppz=dipyrido[3,2-a:2',3'-c]phenazine) photosensitizing walls in different configurations, were synthesized. Upon visible-light irradiation at 420 nm, electron transfer from the [Ru(bpy)2 dppz]2+ to the Q generates the semiquinone (SQ) radical anion, triggering a large conformational switching from a flat kite to a vase with a cavity for the encapsulation of small guests, such as cyclohexane and heteroalicyclic derivatives, in CD3 CN. Depending on the molecular design, the SQ radical anion can live for several minutes (≈10 min) and the vase can be generated in a secondary process without need for addition of a sacrificial electron donor to accumulate the SQ state. Switching can also be triggered by other stimuli, such as changes in solvent, host-guest complexation, and chemical and electrochemical processes. This comprehensive investigation benefits the development of stimuli-responsive nanodevices, such as light-activated molecular grippers.
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Affiliation(s)
- Víctor García-López
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, HCI, Vladimir-Prelog-Weg 3, 8093, Zurich, Switzerland
| | - Michal Zalibera
- Institute of Physical Chemistry and Chemical Physics, Slovak University of Technology, Radlinského 9, 81237, Bratislava, Slovakia
| | - Nils Trapp
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, HCI, Vladimir-Prelog-Weg 3, 8093, Zurich, Switzerland
| | - Martin Kuss-Petermann
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Oliver S Wenger
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - François Diederich
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, HCI, Vladimir-Prelog-Weg 3, 8093, Zurich, Switzerland
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14
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Larsen CB, Farrow GA, Smith LD, Appleby MV, Chekulaev D, Weinstein JA, Wenger OS. Solvent-Mediated Activation/Deactivation of Photoinduced Electron-Transfer in a Molecular Dyad. Inorg Chem 2020; 59:10430-10438. [DOI: 10.1021/acs.inorgchem.0c00679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christopher B. Larsen
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, Basel CH-4056, Switzerland
| | - George A. Farrow
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
| | - Liam D. Smith
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
| | - Martin V. Appleby
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
| | - Dimitri Chekulaev
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
| | - Julia A. Weinstein
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
| | - Oliver S. Wenger
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, Basel CH-4056, Switzerland
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15
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Kumar P, Butcher RJ, Patra AK. Ternary Co(II), Ni(II) and Cu(II) complexes containing dipyridophenazine and saccharin: Structures, reactivity, binding interactions with biomolecules and DNA damage activity. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119532] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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16
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Mamedov VA, Zhukova NA, Kadyrova MS, Fazleeva RR, Bazanova OB, Beschastnova TN, Gubaidullin AT, Rizvanov IK, Yanilkin VV, Latypov SK, Sinyashin OG. Environmentally friendly and efficient method for the synthesis of the new
α
,
α
′‐diimine ligands with benzimidazole moiety. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3962] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Vakhid A. Mamedov
- A.E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences Kazan Russian Federation
| | - Nataliya A. Zhukova
- A.E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences Kazan Russian Federation
| | - Milyausha S. Kadyrova
- A.E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences Kazan Russian Federation
| | - Rezeda R. Fazleeva
- A.E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences Kazan Russian Federation
| | - Olga B. Bazanova
- A.E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences Kazan Russian Federation
| | - Tat'yana N. Beschastnova
- A.E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences Kazan Russian Federation
| | - Aidar T. Gubaidullin
- A.E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences Kazan Russian Federation
| | - Il'dar Kh. Rizvanov
- A.E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences Kazan Russian Federation
| | - Vitaliy V. Yanilkin
- A.E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences Kazan Russian Federation
| | - Shamil K. Latypov
- A.E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences Kazan Russian Federation
| | - Oleg G. Sinyashin
- A.E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences Kazan Russian Federation
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17
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Ethyl 2-(quinoxalin-2(1H)-on-3-yl)acetate and its mono- and dibromo derivatives in the synthesis of 2,2′-biquinoxalin-3,3′(4H,4’H)-diones. Russ Chem Bull 2020. [DOI: 10.1007/s11172-020-2794-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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18
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Saeed HK, Sreedharan S, Jarman PJ, Archer SA, Fairbanks SD, Foxon SP, Auty AJ, Chekulaev D, Keane T, Meijer AJHM, Weinstein JA, Smythe CGW, Bernardino de la Serna J, Thomas JA. Making the Right Link to Theranostics: The Photophysical and Biological Properties of Dinuclear Ru II-Re I dppz Complexes Depend on Their Tether. J Am Chem Soc 2020; 142:1101-1111. [PMID: 31846306 DOI: 10.1021/jacs.9b12564] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The synthesis of new dinuclear complexes containing linked RuII(dppz) and ReI(dppz) moieties is reported. The photophysical and biological properties of the new complex, which incorporates a N,N'-bis(4-pyridylmethyl)-1,6-hexanediamine tether ligand, are compared to a previously reported RuII/ReI complex linked by a simple dipyridyl alkane ligand. Although both complexes bind to DNA with similar affinities, steady-state and time-resolved photophysical studies reveal that the nature of the linker affects the excited state dynamics of the complexes and their DNA photocleavage properties. Quantum-based DFT calculations on these systems offer insights into these effects. While both complexes are live cells permeant, their intracellular localizations are significantly affected by the nature of the linker. Notably, one of the complexes displayed concentration-dependent localization and possesses photophysical properties that are compatible with SIM and STED nanoscopy. This allowed the dynamics of its intracellular localization to be tracked at super resolutions.
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Affiliation(s)
| | | | | | | | | | - Simon P Foxon
- ZapGo, Limited , Rutherford Appleton Laboratory, Harwell , Oxford OX11 0FA , United Kingdom
| | | | | | | | | | | | | | - Jorge Bernardino de la Serna
- Central Laser Facility, Rutherford Appleton Laboratory , Research Complex at Harwell, Science and Technology Facilities Council , Harwell-Oxford , Didcot OX11 0QX , United Kingdom
- National Heart and Lung Institute, Faculty of Medicine , Imperial College London , Sir Alexander Fleming Building, Exhibition Road , London SW7 2AZ , United Kingdom
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19
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Randell NM, Rendon J, Demeunynck M, Bayle P, Gambarelli S, Artero V, Mouesca J, Chavarot‐Kerlidou M. Tuning the Electron Storage Potential of a Charge‐Photoaccumulating Ru
II
Complex by a DFT‐Guided Approach. Chemistry 2019; 25:13911-13920. [DOI: 10.1002/chem.201902312] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 07/19/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Nicholas M. Randell
- Univ. Grenoble Alpes, CNRS, CEAIRIG, Laboratoire de Chimie et Biologie des Métaux 38000 Grenoble France
| | - Julia Rendon
- Univ. Grenoble Alpes, CNRS, CEAIRIG, Laboratoire de Chimie et Biologie des Métaux 38000 Grenoble France
- Univ. Grenoble Alpes, CEA, CNRSIRIG-DIESE-SyMMES-CAMPE 38000 Grenoble France
| | | | | | - Serge Gambarelli
- Univ. Grenoble Alpes, CEA, CNRSIRIG-DIESE-SyMMES-CAMPE 38000 Grenoble France
| | - Vincent Artero
- Univ. Grenoble Alpes, CNRS, CEAIRIG, Laboratoire de Chimie et Biologie des Métaux 38000 Grenoble France
| | - Jean‐Marie Mouesca
- Univ. Grenoble Alpes, CEA, CNRSIRIG-DIESE-SyMMES-CAMPE 38000 Grenoble France
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20
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Isakov D, Giereth R, Nauroozi D, Tschierlei S, Rau S. Two Emissive Long-Lived Excited States of an Imidazole-Functionalized Ruthenium Dipyridophenazine Complex. Inorg Chem 2019; 58:12646-12653. [PMID: 31532651 DOI: 10.1021/acs.inorgchem.9b01372] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A ruthenium(II) polypyridine-type complex based on the dipyridophenazine ligand with a directly fused imidazole unit (L1, dipyrido[3,2-a:2',3'-c]phenazine-10,11-imidazole) has been synthesized, and its electrochemical and photophysical properties have been studied. The cyclic voltammogram of [Ru(tbbpy)2(L1)]2+ (C1) (tbbpy is 4,4'-tert-butyl-2,2'-bipyridine) shows a cathodic shift of the phenazine-based reduction process compared to similar molecules, while the first detected reduction wave (-1.34 V vs Fc/Fc+) is assigned to the imidazole unit within the molecule. On the basis of the TD-DFT calculations, the strong visible absorption band exhibited by C1 is assigned to a metal-to-ligand charge transfer (MLCT) transition with a concurrent ligand-centered (LC) transition. At room-temperature, C1 features emission (Φ = 0.04) from its lowest excited states with time constants of 1.2 and 18.3 μs. These lifetimes are assigned to emission processes from the 3MLCT and 3LC state, respectively. This is the first time that a long-lived dual emission has been observed for a ruthenium(II) complex bearing a directly fused extended π-system. Furthermore, the emission of C1 is quenched upon water addition. In contrast to related compounds based on a dipyridophenazine ligand, the excited state energy is not shifted, and the lifetime is drastically decreased to 169 ns.
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Affiliation(s)
- Dajana Isakov
- Ulm University , Institute of Inorganic Chemistry I , Albert-Einstein-Allee 11 , 89081 Ulm , Germany
| | - Robin Giereth
- Ulm University , Institute of Inorganic Chemistry I , Albert-Einstein-Allee 11 , 89081 Ulm , Germany
| | - Djawed Nauroozi
- Ulm University , Institute of Inorganic Chemistry I , Albert-Einstein-Allee 11 , 89081 Ulm , Germany
| | - Stefanie Tschierlei
- Ulm University , Institute of Inorganic Chemistry I , Albert-Einstein-Allee 11 , 89081 Ulm , Germany
| | - Sven Rau
- Ulm University , Institute of Inorganic Chemistry I , Albert-Einstein-Allee 11 , 89081 Ulm , Germany
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21
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Queyriaux N, Giannoudis E, Lefebvre J, Artero V, Chavarot‐Kerlidou M. Synthesis of Ruthenium Tris‐Diimine Photosensitizers Substituted by Four Methylphosphonate Anchoring Groups for Dye‐Sensitized Photoelectrochemical Cell Applications. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900151] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
| | | | - Jean‐François Lefebvre
- CNRS, CEA, LCBM Univ. Grenoble Alpes 38000 Grenoble France
- CNRS, DPM Univ. Grenoble Alpes 38000 Grenoble France
| | - Vincent Artero
- CNRS, CEA, LCBM Univ. Grenoble Alpes 38000 Grenoble France
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22
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Zhang Y, Zedler L, Karnahl M, Dietzek B. Excited-state dynamics of heteroleptic copper(i) photosensitizers and their electrochemically reduced forms containing a dipyridophenazine moiety – a spectroelectrochemical transient absorption study. Phys Chem Chem Phys 2019; 21:10716-10725. [DOI: 10.1039/c9cp00412b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Heteroleptic copper(i) dipyridophenazine complexes were investigated by transient absorption spectroelectrochemistry to examine their multi-electron photoaccumulation properties.
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Affiliation(s)
- Ying Zhang
- Institute of Physical Chemistry and Abbe Center of Photonics
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Department Functional Interfaces
| | - Linda Zedler
- Department Functional Interfaces
- Leibniz Institute of Photonic Technology Jena (IPHT)
- 07745 Jena
- Germany
| | - Michael Karnahl
- Institute of Organic Chemistry
- University of Stuttgart
- 70569 Stuttgart
- Germany
| | - Benjamin Dietzek
- Institute of Physical Chemistry and Abbe Center of Photonics
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Department Functional Interfaces
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23
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Schindler J, Traber P, Zedler L, Zhang Y, Lefebvre JF, Kupfer S, Gräfe S, Demeunynck M, Chavarot-Kerlidou M, Dietzek B. Photophysics of a Ruthenium Complex with a π-Extended Dipyridophenazine Ligand for DNA Quadruplex Labeling. J Phys Chem A 2018; 122:6558-6569. [DOI: 10.1021/acs.jpca.8b05274] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Julian Schindler
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
- Department Functional Interfaces, Leibniz Institute of Photonic Technology Jena (IPHT), Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Philipp Traber
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - Linda Zedler
- Department Functional Interfaces, Leibniz Institute of Photonic Technology Jena (IPHT), Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Ying Zhang
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
- Department Functional Interfaces, Leibniz Institute of Photonic Technology Jena (IPHT), Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Jean-François Lefebvre
- Univ. Grenoble Alpes, CNRS, DPM, 38000 Grenoble, France
- Laboratoire de Chimie et Biologie des Métaux, Univ. Grenoble Alpes, CNRS, CEA, 38000 Grenoble, France
| | - Stephan Kupfer
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - Stefanie Gräfe
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
| | | | | | - Benjamin Dietzek
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
- Department Functional Interfaces, Leibniz Institute of Photonic Technology Jena (IPHT), Albert-Einstein-Straße 9, 07745 Jena, Germany
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24
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Lefebvre JF, Schindler J, Traber P, Zhang Y, Kupfer S, Gräfe S, Baussanne I, Demeunynck M, Mouesca JM, Gambarelli S, Artero V, Dietzek B, Chavarot-Kerlidou M. An artificial photosynthetic system for photoaccumulation of two electrons on a fused dipyridophenazine (dppz)-pyridoquinolinone ligand. Chem Sci 2018; 9:4152-4159. [PMID: 29780545 PMCID: PMC5941200 DOI: 10.1039/c7sc04348a] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Accepted: 03/31/2018] [Indexed: 01/14/2023] Open
Abstract
Increasing the efficiency of molecular artificial photosynthetic systems is mandatory for the construction of functional devices for solar fuel production. Decoupling the light-induced charge separation steps from the catalytic process is a promising strategy, which can be achieved thanks to the introduction of suitable electron relay units performing charge accumulation. We report here on a novel ruthenium tris-diimine complex able to temporarily store two electrons on a fused dipyridophenazine-pyridoquinolinone π-extended ligand upon visible-light irradiation in the presence of a sacrificial electron donor. Full characterization of this compound and of its singly and doubly reduced derivatives thanks to resonance Raman, EPR and (TD)DFT studies allowed us to localize the two electron-storage sites and to relate charge photoaccumulation with proton-coupled electron transfer processes.
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Affiliation(s)
- Jean-François Lefebvre
- Laboratoire de Chimie et Biologie des Métaux , Univ. Grenoble Alpes , CNRS , CEA , 38000 Grenoble , France .
- Univ. Grenoble Alpes , CNRS , DPM , 38000 Grenoble , France
| | - Julian Schindler
- Institute of Physical Chemistry , Abbe Center of Photonics , Friedrich Schiller University Jena , Helmholtzweg 4 , 07743 Jena , Germany
- Department Functional Interfaces , Leibniz Institute of Photonic Technology Jena (IPHT) , Albert-Einstein-Straße 9 , 07745 Jena , Germany .
| | - Philipp Traber
- Institute of Physical Chemistry , Abbe Center of Photonics , Friedrich Schiller University Jena , Helmholtzweg 4 , 07743 Jena , Germany
| | - Ying Zhang
- Institute of Physical Chemistry , Abbe Center of Photonics , Friedrich Schiller University Jena , Helmholtzweg 4 , 07743 Jena , Germany
- Department Functional Interfaces , Leibniz Institute of Photonic Technology Jena (IPHT) , Albert-Einstein-Straße 9 , 07745 Jena , Germany .
| | - Stephan Kupfer
- Institute of Physical Chemistry , Abbe Center of Photonics , Friedrich Schiller University Jena , Helmholtzweg 4 , 07743 Jena , Germany
| | - Stefanie Gräfe
- Institute of Physical Chemistry , Abbe Center of Photonics , Friedrich Schiller University Jena , Helmholtzweg 4 , 07743 Jena , Germany
| | | | | | - Jean-Marie Mouesca
- Univ. Grenoble Alpes , CEA , CNRS , INAC-SyMMES , 38000 Grenoble , France
| | - Serge Gambarelli
- Univ. Grenoble Alpes , CEA , CNRS , INAC-SyMMES , 38000 Grenoble , France
| | - Vincent Artero
- Laboratoire de Chimie et Biologie des Métaux , Univ. Grenoble Alpes , CNRS , CEA , 38000 Grenoble , France .
| | - Benjamin Dietzek
- Institute of Physical Chemistry , Abbe Center of Photonics , Friedrich Schiller University Jena , Helmholtzweg 4 , 07743 Jena , Germany
- Department Functional Interfaces , Leibniz Institute of Photonic Technology Jena (IPHT) , Albert-Einstein-Straße 9 , 07745 Jena , Germany .
- Center for Energy and Environmental Chemistry , Friedrich Schiller University Jena , Philosophenweg 8 , 07743 Jena , Germany
| | - Murielle Chavarot-Kerlidou
- Laboratoire de Chimie et Biologie des Métaux , Univ. Grenoble Alpes , CNRS , CEA , 38000 Grenoble , France .
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25
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Zhang Y, Traber P, Zedler L, Kupfer S, Gräfe S, Schulz M, Frey W, Karnahl M, Dietzek B. Cu(i) vs. Ru(ii) photosensitizers: elucidation of electron transfer processes within a series of structurally related complexes containing an extended π-system. Phys Chem Chem Phys 2018; 20:24843-24857. [DOI: 10.1039/c8cp04595j] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The charge transfer behavior of heteroleptic Cu(i) photosensitizers was investigated by spectroelectrochemistry and compared to their structurally related Ru(ii) complexes.
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Affiliation(s)
- Ying Zhang
- Institute of Physical Chemistry and Abbe Center of Photonics
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Department Functional Interfaces
| | - Philipp Traber
- Institute of Physical Chemistry and Abbe Center of Photonics
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
| | - Linda Zedler
- Department Functional Interfaces
- Leibniz Institute of Photonic Technology Jena (IPHT)
- 07745 Jena
- Germany
| | - Stephan Kupfer
- Institute of Physical Chemistry and Abbe Center of Photonics
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
| | - Stefanie Gräfe
- Institute of Physical Chemistry and Abbe Center of Photonics
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
| | - Martin Schulz
- Institute of Physical Chemistry and Abbe Center of Photonics
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
| | - Wolfgang Frey
- Institute of Organic Chemistry
- University of Stuttgart
- 70569 Stuttgart
- Germany
| | - Michael Karnahl
- Institute of Organic Chemistry
- University of Stuttgart
- 70569 Stuttgart
- Germany
| | - Benjamin Dietzek
- Institute of Physical Chemistry and Abbe Center of Photonics
- Friedrich Schiller University Jena
- 07743 Jena
- Germany
- Department Functional Interfaces
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26
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Kumar P, Dasari S, Patra AK. Ruthenium(II) complexes of saccharin with dipyridoquinoxaline and dipyridophenazine: Structures, biological interactions and photoinduced DNA damage activity. Eur J Med Chem 2017; 136:52-62. [DOI: 10.1016/j.ejmech.2017.04.076] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/28/2017] [Accepted: 04/29/2017] [Indexed: 11/30/2022]
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27
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Queyriaux N, Wahyuono RA, Fize J, Gablin C, Wächtler M, Martinez E, Léonard D, Dietzek B, Artero V, Chavarot-Kerlidou M. Aqueous Photocurrent Measurements Correlated to Ultrafast Electron Transfer Dynamics at Ruthenium Tris Diimine-Sensitized NiO Photocathodes. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2017; 121:5891-5904. [PMID: 28676835 PMCID: PMC5493983 DOI: 10.1021/acs.jpcc.6b12536] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Understanding the structural and electronic factors governing the efficiency of dye-sensitized NiO photocathodes is essential to optimize solar fuel production in photoelectrochemical cells (PECs). For these purpose, three different ruthenium dyes, bearing either two or four methylphosphonate anchoring groups and either a bipyridine or a dipyridophenazine ancillary ligand, were synthesized and grafted onto NiO films. These photoelectrodes were fully characterized by XPS, ToF-SIMS, UV-vis absorption, time-resolved emission and femtosecond transient absorption spectroscopies. Increasing the number of anchoring groups from two to four proved beneficial for the grafting efficiency. No significant modification of the electronic properties compared to the parent photosensitizer was observed, in accordance with the non-conjugated nature of the grafted linker. The photoelectrochemical activity of the dye-sensitized NiO electrodes was assessed in fully aqueous medium in the presence of an irreversible electron acceptor and photocurrents reaching 190 μA.cm-2 were recorded. The transient absorption study revealed the presence of two charge recombination pathways for each of the sensitizers and evidenced a stabilized charge separated state in the dppz derivative, supporting its superior photoelectrochemical activity.
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Affiliation(s)
- Nicolas Queyriaux
- Laboratoire de Chimie et Biologie des Métaux, UMR 5249 University Grenoble Alpes, CNRS, CEA, 17 rue des Martyrs, 38000 Grenoble, France
| | - Ruri A. Wahyuono
- Leibniz Institute of Photonic Technology (IPHT) Jena e. V., Albert-Einstein-Strasse 9, Jena 07745, Germany
- Institute for Physical Chemistry and Center for Energy and Environmental Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany
| | - Jennifer Fize
- Laboratoire de Chimie et Biologie des Métaux, UMR 5249 University Grenoble Alpes, CNRS, CEA, 17 rue des Martyrs, 38000 Grenoble, France
| | - Corinne Gablin
- Institut des Sciences Analytiques, UMR 5280 (Université Claude Bernard Lyon 1 /CNRS / ENS de Lyon), 5 rue de la Doua, 69100 Villeurbanne, France
| | - Maria Wächtler
- Leibniz Institute of Photonic Technology (IPHT) Jena e. V., Albert-Einstein-Strasse 9, Jena 07745, Germany
- Institute for Physical Chemistry and Center for Energy and Environmental Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany
| | - Eugénie Martinez
- CEA, Leti, MINATEC Campus, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France
| | - Didier Léonard
- Institut des Sciences Analytiques, UMR 5280 (Université Claude Bernard Lyon 1 /CNRS / ENS de Lyon), 5 rue de la Doua, 69100 Villeurbanne, France
| | - Benjamin Dietzek
- Leibniz Institute of Photonic Technology (IPHT) Jena e. V., Albert-Einstein-Strasse 9, Jena 07745, Germany
- Institute for Physical Chemistry and Center for Energy and Environmental Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany
| | - Vincent Artero
- Laboratoire de Chimie et Biologie des Métaux, UMR 5249 University Grenoble Alpes, CNRS, CEA, 17 rue des Martyrs, 38000 Grenoble, France
| | - Murielle Chavarot-Kerlidou
- Laboratoire de Chimie et Biologie des Métaux, UMR 5249 University Grenoble Alpes, CNRS, CEA, 17 rue des Martyrs, 38000 Grenoble, France
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28
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Probing the use of long lived intra-ligand π–π* excited states for photocatalytic systems: A study of the photophysics and photochemistry of [ReCl(CO)3(dppz-(CH3)2)]. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Quadruple electron storage using visible light with nitrogen-heterocycles under metal-free conditions. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.06.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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30
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Löw I, Bubrin M, Paretzki A, Fiedler J, Záliš S, Kaim W. The BIAN ligand 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene: An electron sponge or a “normal” α-diimine ligand? Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.05.054] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Heberle M, Tschierlei S, Rockstroh N, Ringenberg M, Frey W, Junge H, Beller M, Lochbrunner S, Karnahl M. Heteroleptic Copper Photosensitizers: Why an Extended π-System Does Not Automatically Lead to Enhanced Hydrogen Production. Chemistry 2016; 23:312-319. [DOI: 10.1002/chem.201604005] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Martin Heberle
- Institute of Organic Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Stefanie Tschierlei
- Institute of Organic Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
- Institute of Physics; University of Rostock; Albert-Einstein-Str. 23 18059 Rostock Germany
| | - Nils Rockstroh
- Leibniz-Institute for Catalysis at the; University of Rostock (LIKAT); Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Mark Ringenberg
- Institute of Inorganic Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Institute of Organic Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Henrik Junge
- Leibniz-Institute for Catalysis at the; University of Rostock (LIKAT); Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Matthias Beller
- Leibniz-Institute for Catalysis at the; University of Rostock (LIKAT); Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Stefan Lochbrunner
- Institute of Physics; University of Rostock; Albert-Einstein-Str. 23 18059 Rostock Germany
| | - Michael Karnahl
- Institute of Organic Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
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32
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Horvath R, Huff GS, Gordon KC, George MW. Probing the excited state nature of coordination complexes with blended organic and inorganic chromophores using vibrational spectroscopy. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.04.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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33
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Mengele AK, Kaufhold S, Streb C, Rau S. Generation of a stable supramolecular hydrogen evolving photocatalyst by alteration of the catalytic center. Dalton Trans 2016; 45:6612-8. [DOI: 10.1039/c6dt00130k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The change of the catalytic center from MX2 to RhCp*Cl leads to a stability boost in [(tbbpy)2Ru(tpphz)] based supramolecular photocatalysts.
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Affiliation(s)
- Alexander K. Mengele
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
| | - Simon Kaufhold
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
| | - Carsten Streb
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
| | - Sven Rau
- University of Ulm
- Institute of Inorganic Chemistry Materials and Catalysis
- 89081 Ulm
- Germany
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34
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Coogan MP, Platts JA. Blue rhenium tricarbonyl DPPZ complexes – low energy charge-transfer absorption at tissue-penetrating wavelengths. Chem Commun (Camb) 2016; 52:12498-12501. [DOI: 10.1039/c6cc07125b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Re and Mn DPPZ amido complexes show absorption bands with potential for light harvesting and photodynamic therapy.
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Affiliation(s)
- M. P. Coogan
- Chemistry Department
- Lancaster University
- Lancaster
- UK
| | - J. A. Platts
- Cardiff School of Chemistry
- Cardiff University
- Cardiff
- UK
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35
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Aslan JM, Boston DJ, MacDonnell FM. Photodriven Multi-electron Storage in Disubstituted RuIIDppz Analogues. Chemistry 2015; 21:17314-23. [DOI: 10.1002/chem.201502607] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Indexed: 11/06/2022]
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36
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White TA, Witt SE, Li Z, Dunbar KR, Turro C. New Rh2(II,II) Architecture for the Catalytic Reduction of H+. Inorg Chem 2015; 54:10042-8. [DOI: 10.1021/acs.inorgchem.5b01823] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Travis A. White
- Department of Chemistry
and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Suzanne E. Witt
- Department of Chemistry
and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Zhanyong Li
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Kim R. Dunbar
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Claudia Turro
- Department of Chemistry
and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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37
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van der Salm H, Elliott AB, Gordon KC. Substituent effects on the electronic properties of complexes with dipyridophenazine and triazole ligands: Electronically connected and disconnected ligands. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.05.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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38
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Monczak K, Peuntinger K, Sorsche D, Heinemann FW, Guldi DM, Rau S. Synthesis and Characterization of a Trisheteroleptic RuII-Based Molecular Switch. Chemistry 2014; 20:15426-33. [DOI: 10.1002/chem.201403418] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Indexed: 11/07/2022]
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39
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Meyer-Ilse J, Bauroth S, Bräutigam M, Schmitt M, Popp J, Beckert R, Rockstroh N, Pilz TD, Monczak K, Heinemann FW, Rau S, Dietzek B. Modified bibenzimidazole ligands as spectator ligands in photoactive molecular functional Ru-polypyridine units? Implications from spectroscopy. Dalton Trans 2014; 43:17659-65. [DOI: 10.1039/c4dt01399a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Mondal P, Agarwala H, Jana RD, Plebst S, Grupp A, Ehret F, Mobin SM, Kaim W, Lahiri GK. Sensitivity of a Strained C–C Single Bond to Charge Transfer: Redox Activity in Mononuclear and Dinuclear Ruthenium Complexes of Bis(arylimino)acenaphthene (BIAN) Ligands. Inorg Chem 2014; 53:7389-403. [DOI: 10.1021/ic500730m] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Prasenjit Mondal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Hemlata Agarwala
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Rahul Dev Jana
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sebastian Plebst
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70550 Stuttgart, Germany
| | - Anita Grupp
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70550 Stuttgart, Germany
| | - Fabian Ehret
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70550 Stuttgart, Germany
| | - Shaikh M. Mobin
- Discipline of Chemistry, School of Basic
Sciences, Indian Institute of Technology Indore, Indore 452017, India
| | - Wolfgang Kaim
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70550 Stuttgart, Germany
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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41
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Boston DJ, Pachón YMF, Lezna RO, de Tacconi NR, MacDonnell FM. Electrocatalytic and photocatalytic conversion of CO(2) to methanol using ruthenium complexes with internal pyridyl cocatalysts. Inorg Chem 2014; 53:6544-53. [PMID: 24909055 DOI: 10.1021/ic500051m] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The ruthenium complexes [Ru(phen)2(ptpbα)](2+) (Ruα) and [Ru(phen)2(ptpbβ)](2+) (Ruβ), where phen =1,10-phenanthroline ; ptpbα = pyrido[2',3':5,6]pyrazino[2,3-f][1,10]phenanthroline; ptpbβ = pyrido[3',4':5,6]pyrazino[2,3-f][1,10]phenanthroline, are shown as electrocatalysts and photocatalysts for CO2 reduction to formate, formaldehyde, and methanol. Photochemical activity of both complexes is lost in water but is retained in 1 M H2O in DMF. Controlled current electrolysis of a solution of Ruβ in CO2 saturated DMF:H2O (1 M) yields predominantly methanol over a 6 h period at ∼ -0.60 V versus Ag/AgCl, with traces of formaldehyde. After this time, the potential jumped to -1.15 V producing both methanol and CO as products. Irradiation of Ruβ in a solution of DMF:H2O (1 M) containing 0.2 M TEA (as the sacrificial reductant) yields methanol, formaldehyde, and formate. Identifications of all of the relevant redox and protonated states of the respective complexes were obtained by a combination of voltammetry and differential reflectance measurements. Spectroelectrochemistry was particularly useful to probe the photochemical and electrochemical reduction mechanisms of both complexes as well as the complexes speciation in the absence and presence of CO2.
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Affiliation(s)
- David J Boston
- Department of Chemistry and Biochemistry, The University of Texas at Arlington , Arlington, Texas 76019-0065, United States
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42
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van der Salm H, Fraser MG, Horvath R, Cameron SA, Barnsley JE, Sun XZ, George MW, Gordon KC. Re(I) Complexes of Substituted dppz: A Computational and Spectroscopic Study. Inorg Chem 2014; 53:3126-40. [DOI: 10.1021/ic403056g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Holly van der Salm
- Department
of Chemistry, University of Otago, Union Place, 9016 Dunedin, New Zealand
| | - Michael G. Fraser
- Department
of Chemistry, University of Otago, Union Place, 9016 Dunedin, New Zealand
| | - Raphael Horvath
- School
of Chemistry, University of Nottingham, Nottingham NG7 2NR, United Kingdom
| | - Scott A. Cameron
- Department
of Chemistry, University of Otago, Union Place, 9016 Dunedin, New Zealand
| | - Jonathan E. Barnsley
- Department
of Chemistry, University of Otago, Union Place, 9016 Dunedin, New Zealand
| | - Xue-Zhong Sun
- School
of Chemistry, University of Nottingham, Nottingham NG7 2NR, United Kingdom
| | - Michael W. George
- School
of Chemistry, University of Nottingham, Nottingham NG7 2NR, United Kingdom
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43
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Larsen CB, van der Salm H, Clark CA, Elliott ABS, Fraser MG, Horvath R, Lucas NT, Sun XZ, George MW, Gordon KC. Intraligand Charge-Transfer Excited States in Re(I) Complexes with Donor-Substituted Dipyridophenazine Ligands. Inorg Chem 2014; 53:1339-54. [DOI: 10.1021/ic402082m] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Christopher B. Larsen
- MacDiarmid
Institute for Advanced Materials and Nanotechnology, Department of
Chemistry, University of Otago, Union Place, Dunedin 9001, New Zealand
| | - Holly van der Salm
- MacDiarmid
Institute for Advanced Materials and Nanotechnology, Department of
Chemistry, University of Otago, Union Place, Dunedin 9001, New Zealand
| | - Charlotte A. Clark
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Anastasia B. S. Elliott
- MacDiarmid
Institute for Advanced Materials and Nanotechnology, Department of
Chemistry, University of Otago, Union Place, Dunedin 9001, New Zealand
| | - Michael G. Fraser
- MacDiarmid
Institute for Advanced Materials and Nanotechnology, Department of
Chemistry, University of Otago, Union Place, Dunedin 9001, New Zealand
| | - Raphael Horvath
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Nigel T. Lucas
- MacDiarmid
Institute for Advanced Materials and Nanotechnology, Department of
Chemistry, University of Otago, Union Place, Dunedin 9001, New Zealand
| | - Xue-Zhong Sun
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Michael W. George
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Keith C. Gordon
- MacDiarmid
Institute for Advanced Materials and Nanotechnology, Department of
Chemistry, University of Otago, Union Place, Dunedin 9001, New Zealand
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44
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Experimental and theoretical characterisation of phosphorescence from rhenium polypyridyl tricarbonyl complexes. Polyhedron 2014. [DOI: 10.1016/j.poly.2013.09.033] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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45
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Grupp A, Bubrin M, Ehret F, Zeng Q, Hartl F, Kvapilová H, Záliš S, Kaim W. RuII(α-diimine) or RuIII(α-diimine·-)? Structural, Spectroscopic, and Theoretical Evidence for the Stabilization of a Prominent Metal-to-Ligand Charge-Transfer Excited-State Configuration in the Ground State. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201301206] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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46
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Majewski MB, de Tacconi NR, MacDonnell FM, Wolf MO. Long-lived, directional photoinduced charge separation in RuII complexes bearing laminate polypyridyl ligands. Chemistry 2013; 19:8331-41. [PMID: 23613232 DOI: 10.1002/chem.201203786] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Revised: 03/19/2013] [Indexed: 11/11/2022]
Abstract
RuII complexes incorporating both amide-linked bithiophene donor ancillary ligands and laminate acceptor ligands; dipyrido[3,2-a:2',3'-c]phenazine (dppz), tetrapyrido[3,2-a:2',3'-c:3'',2''-h:2''',3'''-j]phenazine (tpphz), and 9,11,20,22-tetraazatetrapyrido[3,2-a:2',3'-c:3'',2''-l:2''',3''']-pentacene (tatpp) exhibit long-lived charge separated (CS) states, which have been analyzed using time-resolved transient absorption (TA), fluorescence, and electronic absorption spectroscopy in addition to ground state electrochemical and spectroelectrochemical measurements. These complexes possess two electronically relevant ³MLCT states related to electron occupation of MOs localized predominantly on the proximal "bpy-like" portion and central (or distal) "phenazine-like" portion of the acceptor ligand as well as energetically similar ³LC and ³ILCT states. The unusually long excited state lifetimes (τ up to 7 μs) observed in these complexes reflect an equilibration of the ³MLCTprox or ³MLCTdist states with additional triplet states, including a ³LC state and a ³ILCT state that formally localizes a hole on the bithiophene moiety and an electron on the laminate acceptor ligand. Coordination of a ZnII ion to the open coordination site of the laminate acceptor ligand is observed to significantly lower the energy of the ³MLCTdist state by decreasing the magnitude of the excited state dipole and resulting in much shorter excited state lifetimes. The presence of the bithiophene donor group is reported to substantially extend the lifetime of these Zn adducts via formation of a ³ILCT state that can equilibrate with the ³MLCTdist state. In tpphz complexes, ZnII coordination can reorder the energy of the ³MLCTprox and ³MLCTdist states such that there is a distinct switch from one state to the other. The net result is a series of complexes that are capable of forming CS states with electron-hole spatial separation of up to 14 Å and possess exceptionally long lifetimes by equilibration with other triplet states.
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Affiliation(s)
- Marek B Majewski
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
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47
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Shuster V, Gambarotta S, Nikiforov GB, Budzelaar PHM. Heterometallic Aluminum–Chromium Phenazine and Thiophenazine Complexes. Formation of a Tetranuclear Chromium(I) Sandwich Complex. Organometallics 2013. [DOI: 10.1021/om3012097] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vladimir Shuster
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
| | - Sandro Gambarotta
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
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48
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Structural, electronic and computational studies of heteroleptic Cu(I) complexes of 6,6′-dimesityl-2,2′-bipyridine with sulfur-substituted dipyridophenazine ligands. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.08.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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49
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Anderson CB, Elliott ABS, McAdam CJ, Gordon KC, Crowley JD. fac-Re(CO)3Cl Complexes of [2-(4-R-1H-1,2,3-Triazol-1-yl)methyl]pyridine Inverse “Click” Ligands: A Systematic Synthetic, Spectroscopic, and Computational Study. Organometallics 2013. [DOI: 10.1021/om300868k] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Christopher B. Anderson
- Department of Chemistry and ‡MacDiarmid
Institute for Advanced
Materials and Nanotechnology, University of Otago, P.O. Box 56, Dunedin, New Zealand
| | - Anastasia B. S. Elliott
- Department of Chemistry and ‡MacDiarmid
Institute for Advanced
Materials and Nanotechnology, University of Otago, P.O. Box 56, Dunedin, New Zealand
| | - C. John McAdam
- Department of Chemistry and ‡MacDiarmid
Institute for Advanced
Materials and Nanotechnology, University of Otago, P.O. Box 56, Dunedin, New Zealand
| | - Keith C. Gordon
- Department of Chemistry and ‡MacDiarmid
Institute for Advanced
Materials and Nanotechnology, University of Otago, P.O. Box 56, Dunedin, New Zealand
| | - James D. Crowley
- Department of Chemistry and ‡MacDiarmid
Institute for Advanced
Materials and Nanotechnology, University of Otago, P.O. Box 56, Dunedin, New Zealand
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50
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Olaprath W, McGuire ME. Comparison of the electrochemical reductions of Ru(II) complexes of dipyrido[3,2-a:2′,3′-c]phenazine and 10,12-dimethylpteridino[6,7-f][1,10]phenanthroline-11,13(10H,12H)-dione (an alloxazine analog) in aprotic and mixed aprotic/aqueous media. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.10.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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