1
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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2
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McGarry RJ, Varvarezos L, Pryce MT, Long C. Excited-State Dynamics Leading Either to Triplet Formation or Coordinative Expansion following Photolysis of Cu(II)-Porphyrins: A DFT, TD-DFT, Luminescence and Femtosecond Time-Resolved Absorbance Study. Molecules 2023; 28:6310. [PMID: 37687139 PMCID: PMC10488807 DOI: 10.3390/molecules28176310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
The photophysical properties of Cu(II) complexes with 5,10,15,20-meso-tetrakis(phenyl)porphyrin and 5,10,15,20-meso-tetrakis(N-methylpyridium-4-yl)porphyrin are examined via the luminescence and femtosecond time-resolved absorbance methods, respectively. These studies are supported by DFT and TD-DFT calculations, which highlight the important role played by ligand-to-metal charge-transfer states in directing the system toward either intersystem crossing to the triplet hypersurface or coordinative expansion to a five-coordinate quasi-stable intermediate. The latter processes occur when the porphyrin is photolyzed in the presence of suitably located Lewis bases. Femtosecond time-resolved absorbance measurements of Cu(II)-5,10,15,20-meso-tetrakis(N-methylpyridium-4-yl)porphyrin confirm that the coordinative expansion in water occurs in approximately 700 fs, while crossing to the triplet hypersurface takes approximately 140 fs in the same solvent. These processes are mutually exclusive, although both can occur simultaneously depending on the environment of the porphyrin. The ratio of the two processes depends on the relative orientation of the Lewis base with respect to the copper atom at the time of excitation. As a consequence, copper porphyrins such as these are excellent probes in the environment of the porphyrin and can be used to identify the location of the porphyrin when interacting with DNA fragments.
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Affiliation(s)
- Ross J. McGarry
- School of Chemical Sciences, Dublin City University, D09 V209 Dublin, Ireland; (R.J.M.); (M.T.P.)
| | - Lazaros Varvarezos
- School of Physical Sciences, Dublin City University, D09 V209 Dublin, Ireland;
| | - Mary T. Pryce
- School of Chemical Sciences, Dublin City University, D09 V209 Dublin, Ireland; (R.J.M.); (M.T.P.)
| | - Conor Long
- School of Chemical Sciences, Dublin City University, D09 V209 Dublin, Ireland; (R.J.M.); (M.T.P.)
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3
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Kearney L, Brandon MP, Coleman A, Chippindale AM, Hartl F, Lalrempuia R, Pižl M, Pryce MT. Ligand-Structure Effects on N-Heterocyclic Carbene Rhenium Photo- and Electrocatalysts of CO 2 Reduction. Molecules 2023; 28:molecules28104149. [PMID: 37241890 DOI: 10.3390/molecules28104149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/20/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023] Open
Abstract
Three novel rhenium N-heterocyclic carbene complexes, [Re]-NHC-1-3 ([Re] = fac-Re(CO)3Br), were synthesized and characterized using a range of spectroscopic techniques. Photophysical, electrochemical and spectroelectrochemical studies were carried out to probe the properties of these organometallic compounds. Re-NHC-1 and Re-NHC-2 bear a phenanthrene backbone on an imidazole (NHC) ring, coordinating to Re by both the carbene C and a pyridyl group attached to one of the imidazole nitrogen atoms. Re-NHC-2 differs from Re-NHC-1 by replacing N-H with an N-benzyl group as the second substituent on imidazole. The replacement of the phenanthrene backbone in Re-NHC-2 with the larger pyrene gives Re-NHC-3. The two-electron electrochemical reductions of Re-NHC-2 and Re-NHC-3 result in the formation of the five-coordinate anions that are capable of electrocatalytic CO2 reduction. These catalysts are formed first at the initial cathodic wave R1, and then, ultimately, via the reduction of Re-Re bound dimer intermediates at the second cathodic wave R2. All three Re-NHC-1-3 complexes are active photocatalysts for the transformation of CO2 to CO, with the most photostable complex, Re-NHC-3, being the most effective for this conversion. Re-NHC-1 and Re-NHC-2 afforded modest CO turnover numbers (TONs), following irradiation at 355 nm, but were inactive at the longer irradiation wavelength of 470 nm. In contrast, Re-NHC-3, when photoexcited at 470 nm, yielded the highest TON in this study, but remained inactive at 355 nm. The luminescence spectrum of Re-NHC-3 is red-shifted compared to those of Re-NHC-1 and Re-NHC-2, and previously reported similar [Re]-NHC complexes. This observation, together with TD-DFT calculations, suggests that the nature of the lowest-energy optical excitation for Re-NHC-3 has π→π*(NHC-pyrene) and dπ(Re)→π*(pyridine) (IL/MLCT) character. The stability and superior photocatalytic performance of Re-NHC-3 are attributed to the extended conjugation of the π-electron system, leading to the beneficial modulation of the strongly electron-donating tendency of the NHC group.
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Affiliation(s)
- Lauren Kearney
- School of Chemical Sciences, Dublin City University, D09 K20V Dublin, Ireland
| | - Michael P Brandon
- School of Chemical Sciences, Dublin City University, D09 K20V Dublin, Ireland
| | - Andrew Coleman
- School of Chemical Sciences, Dublin City University, D09 K20V Dublin, Ireland
| | - Ann M Chippindale
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6DX, UK
| | - František Hartl
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6DX, UK
| | - Ralte Lalrempuia
- School of Chemical Sciences, Dublin City University, D09 K20V Dublin, Ireland
- Department of Chemistry, School of Physical Sciences, Mizoram University, Aizawl 796004, India
| | - Martin Pižl
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic
| | - Mary T Pryce
- School of Chemical Sciences, Dublin City University, D09 K20V Dublin, Ireland
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4
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Turzańska K, Adesanya O, Rajagopal A, Pryce MT, Fitzgerald Hughes D. Improving the Management and Treatment of Diabetic Foot Infection: Challenges and Research Opportunities. Int J Mol Sci 2023; 24:ijms24043913. [PMID: 36835330 PMCID: PMC9959562 DOI: 10.3390/ijms24043913] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/03/2023] [Accepted: 02/08/2023] [Indexed: 02/17/2023] Open
Abstract
Diabetic foot infection (DFI) management requires complex multidisciplinary care pathways with off-loading, debridement and targeted antibiotic treatment central to positive clinical outcomes. Local administration of topical treatments and advanced wound dressings are often used for more superficial infections, and in combination with systemic antibiotics for more advanced infections. In practice, the choice of such topical approaches, whether alone or as adjuncts, is rarely evidence-based, and there does not appear to be a single market leader. There are several reasons for this, including a lack of clear evidence-based guidelines on their efficacy and a paucity of robust clinical trials. Nonetheless, with a growing number of people living with diabetes, preventing the progression of chronic foot infections to amputation is critical. Topical agents may increasingly play a role, especially as they have potential to limit the use of systemic antibiotics in an environment of increasing antibiotic resistance. While a number of advanced dressings are currently marketed for DFI, here we review the literature describing promising future-focused approaches for topical treatment of DFI that may overcome some of the current hurdles. Specifically, we focus on antibiotic-impregnated biomaterials, novel antimicrobial peptides and photodynamic therapy.
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Affiliation(s)
- Kaja Turzańska
- Department of Clinical Microbiology, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Education and Research Centre, Beaumont Hospital, D09 YD60 Dublin, Ireland
| | - Oluwafolajimi Adesanya
- School of Molecular and Cellular Biology, University of Illinois Urbana-Champaign, Champaign, IL 61801, USA
| | - Ashwene Rajagopal
- Department of Clinical Microbiology, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Education and Research Centre, Beaumont Hospital, D09 YD60 Dublin, Ireland
| | - Mary T. Pryce
- School of Chemical Sciences, Dublin City University, D09 V209 Dublin, Ireland
| | - Deirdre Fitzgerald Hughes
- Department of Clinical Microbiology, Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Education and Research Centre, Beaumont Hospital, D09 YD60 Dublin, Ireland
- Correspondence: ; Tel.: +353-1-8093711
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5
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Neill JS, Boyle NM, Marques Passo T, Heintz K, Browne WR, Quilty B, Pryce MT. Photophysical and electrochemical properties of meso-tetrathien-2’-yl porphyrins compared to meso-tetraphenylporphyrin. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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6
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O'Neill JS, Kearney L, Brandon MP, Pryce MT. Design components of porphyrin-based photocatalytic hydrogen evolution systems: A review. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214599] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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7
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Seddon AA, Karlsson JKG, Gibson EA, O’Reilly L, Kaufmann M, Vos JG, Pryce MT. Photoelectrochemical Hydrogen Evolution Using Dye-Sensitised Nickel Oxide : Environmental effects and photocatalyst design considerations. Johnson Matthey Technology Review 2022. [DOI: 10.1595/205651322x16269403109779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Photoelectrocatalysis offers a way to generate hydrogen and oxygen from water under ambient light. Here, a series of hydrogen evolving photocatalysts based on a ruthenium(II) bipyridyl sensitiser covalently linked to platinum or palladium catalytic centres were adsorbed onto mesoporous
nickel oxide and tested for hydrogen evolution in a photoelectrochemical half-cell. The electrolyte buffer was varied and certain catalysts performed better at pH 7 than pH 3 (for example, PC3 with photocurrent density = 8 μA cm‐2), which is encouraging for coupling with
an oxygen evolving photoanode in tandem water splitting devices. The molecular catalysts were surprisingly robust when integrated into devices, but the overall performance appears to be limited by rapid recombination at the photocatalyst|NiO interface. Our findings provide further insight
towards basic design principles for hydrogen evolving photoelectrochemical systems and guidelines for further development.
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Affiliation(s)
- Abigail A. Seddon
- Chemistry, School of Natural and Environmental Sciences, Newcastle University NE1 7RU UK
| | - Joshua K. G. Karlsson
- Chemistry, School of Natural and Environmental Sciences, Newcastle University NE1 7RU UK
| | - Elizabeth A. Gibson
- Chemistry, School of Natural and Environmental Sciences, Newcastle University NE1 7RU UK
| | - Laura O’Reilly
- School of Chemical Sciences, Dublin City University Dublin 9 Ireland
| | - Martin Kaufmann
- School of Chemical Sciences, Dublin City University Dublin 9 Ireland
| | - Johannes G. Vos
- School of Chemical Sciences, Dublin City University Dublin 9 Ireland
| | - Mary T. Pryce
- School of Chemical Sciences, Dublin City University Dublin 9 Ireland
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8
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Cerpentier FJR, Karlsson J, Lalrempuia R, Brandon MP, Sazanovich IV, Greetham GM, Gibson EA, Pryce MT. Ruthenium Assemblies for CO 2 Reduction and H 2 Generation: Time Resolved Infrared Spectroscopy, Spectroelectrochemistry and a Photocatalysis Study in Solution and on NiO. Front Chem 2022; 9:795877. [PMID: 35004612 PMCID: PMC8738169 DOI: 10.3389/fchem.2021.795877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 11/29/2021] [Indexed: 11/13/2022] Open
Abstract
Two novel supramolecular complexes RuRe ([Ru(dceb)2(bpt)Re(CO)3Cl](PF6)) and RuPt ([Ru(dceb)2(bpt)PtI(H2O)](PF6)2) [dceb = diethyl(2,2′-bipyridine)-4,4′-dicarboxylate, bpt = 3,5-di(pyridine-2-yl)-1,2,4-triazolate] were synthesized as new catalysts for photocatalytic CO2 reduction and H2 evolution, respectively. The influence of the catalytic metal for successful catalysis in solution and on a NiO semiconductor was examined. IR-active handles in the form of carbonyl groups on the peripheral ligand on the photosensitiser were used to study the excited states populated, as well as the one-electron reduced intermediate species using infrared and UV-Vis spectroelectrochemistry, and time resolved infrared spectroscopy. Inclusion of ethyl-ester moieties led to a reduction in the LUMO energies on the peripheral bipyridine ligand, resulting in localization of the 3MLCT excited state on these peripheral ligands following excitation. RuPt generated hydrogen in solution and when immobilized on NiO in a photoelectrochemical (PEC) cell. RuRe was inactive as a CO2 reduction catalyst in solution, and produced only trace amounts of CO when the photocatalyst was immobilized on NiO in a PEC cell saturated with CO2.
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Affiliation(s)
| | - Joshua Karlsson
- Energy Materials Laboratory, Department of Chemistry, School of Natural and Environmental Science, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Ralte Lalrempuia
- School of Chemical Sciences, Dublin City University, Dublin, Ireland.,Department of Chemistry, School of Physical Sciences, Mizoram University, Aizawl, India
| | - Michael P Brandon
- School of Chemical Sciences, Dublin City University, Dublin, Ireland
| | - Igor V Sazanovich
- Central Laser Facility, Science and Technology Facilities Council, Research Complex at Harwell, Rutherford Appleton Laboratory, Oxford, United Kingdom
| | - Gregory M Greetham
- Central Laser Facility, Science and Technology Facilities Council, Research Complex at Harwell, Rutherford Appleton Laboratory, Oxford, United Kingdom
| | - Elizabeth A Gibson
- Energy Materials Laboratory, Department of Chemistry, School of Natural and Environmental Science, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Mary T Pryce
- School of Chemical Sciences, Dublin City University, Dublin, Ireland
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9
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Rajagopal A, Biddulph J, Tabrizi L, Fitzgerald-Hughes D, Pryce MT. Photoactive organometallic compounds as antimicrobial agents. Advances in Inorganic Chemistry 2022. [DOI: 10.1016/bs.adioch.2022.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Cullen A, Rajagopal A, Heintz K, Heise A, Murphy R, Sazanovich IV, Greetham GM, Towrie M, Long C, Fitzgerald-Hughes D, Pryce MT. Exploiting a Neutral BODIPY Copolymer as an Effective Agent for Photodynamic Antimicrobial Inactivation. J Phys Chem B 2021; 125:1550-1557. [PMID: 33538173 PMCID: PMC8279490 DOI: 10.1021/acs.jpcb.0c09634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 01/15/2021] [Indexed: 12/24/2022]
Abstract
We report the synthesis and photophysical properties of a neutral BODIPY photosensitizing copolymer (poly-8-(4-hydroxymethylphenyl)-4,4-difluoro-2,6-diethynyl-4-bora-3a,4a-diaza-s-indacene) containing ethynylbenzene links between the BODIPY units. The copolymer absorbs further towards the red in the UV-vis spectrum compared to the BODIPY precursor. Photolysis of the polymer produces a singlet excited state which crosses to the triplet surface in less than 300 ps. This triplet state was used to form singlet oxygen with a quantum yield of 0.34. The steps leading to population of the triplet state were studied using time-resolved spectroscopic techniques spanning the pico- to nanosecond timescales. The ability of the BODIPY polymer to generate a biocidal species for bactericidal activity in both solution- and coating-based studies was assessed. When the BODIPY copolymer was dropcast onto a surface, 4 log and 6 log reductions in colony forming units/ml representative of Gram-positive and Gram-negative bacteria, respectively, under illumination at 525 nm were observed. The potent broad-spectrum antimicrobial activity of a neutral metal-free copolymer when exposed to visible light conditions may have potential clinical applications in infection management.
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Affiliation(s)
- Aoibhín
A. Cullen
- School
of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Ashwene Rajagopal
- School
of Chemical Sciences, Dublin City University, Dublin 9, Ireland
- Department
of Clinical Microbiology, RCSI Education and Research, Royal College of Surgeons in Ireland, Beaumont Hospital, Beaumont, Dublin 9, Ireland
| | - Katharina Heintz
- School
of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Andreas Heise
- Department
of Chemistry, Science Foundation Ireland (SFI) Centre for Research
in Medical Devices (CURAM), The Science Foundation Ireland (SFI) Advanced
Materials and Bioengineering Research Centre (AMBER), RCSI University of Medicine and Health Science, 123 St. Stephen’s Green, Dublin 2, Ireland
| | - Robert Murphy
- Department
of Chemistry, Science Foundation Ireland (SFI) Centre for Research
in Medical Devices (CURAM), The Science Foundation Ireland (SFI) Advanced
Materials and Bioengineering Research Centre (AMBER), RCSI University of Medicine and Health Science, 123 St. Stephen’s Green, Dublin 2, Ireland
| | - Igor V. Sazanovich
- Central
Laser Facility, Science & Technology Facilities Council, Research
Complex at Harwell, Rutherford Appleton
Laboratory, Didcot OX11 0QX, U.K.
| | - Gregory M. Greetham
- Central
Laser Facility, Science & Technology Facilities Council, Research
Complex at Harwell, Rutherford Appleton
Laboratory, Didcot OX11 0QX, U.K.
| | - Michael Towrie
- Central
Laser Facility, Science & Technology Facilities Council, Research
Complex at Harwell, Rutherford Appleton
Laboratory, Didcot OX11 0QX, U.K.
| | - Conor Long
- School
of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Deirdre Fitzgerald-Hughes
- Department
of Clinical Microbiology, RCSI Education and Research, Royal College of Surgeons in Ireland, Beaumont Hospital, Beaumont, Dublin 9, Ireland
| | - Mary T. Pryce
- School
of Chemical Sciences, Dublin City University, Dublin 9, Ireland
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11
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Kaufmann M, Müller C, Cullen AA, Brandon MP, Dietzek B, Pryce MT. Photophysics of Ruthenium(II) Complexes with Thiazole π-Extended Dipyridophenazine Ligands. Inorg Chem 2020; 60:760-773. [PMID: 33356204 DOI: 10.1021/acs.inorgchem.0c02765] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Transition-metal-based donor-acceptor systems can produce long-lived excited charge-transfer states by visible-light irradiation. The novel ruthenium(II) polypyridyl type complexes Ru1 and Ru2 based on the dipyridophenazine ligand (L0) directly linked to 4-hydroxythiazoles of different donor strengths were synthesized and photophysically characterized. The excited-state dynamics were investigated by femtosecond-to-nanosecond transient absorption and nanosecond emission spectroscopy complemented by time-dependent density functional theory calculations. These results indicate that photoexcitation in the visible region leads to the population of both metal-to-ligand charge-transfer (1MLCT) and thiazole (tz)-induced intraligand charge-transfer (1ILCT) states. Thus, the excited-state dynamics is described by two excited-state branches, namely, the population of (i) a comparably short-lived phenazine-centered 3MLCT state (τ ≈ 150-400 ps) and (ii) a long-lived 3ILCT state (τ ≈ 40-300 ns) with excess charge density localized on the phenazine and tz moieties. Notably, the ruthenium(II) complexes feature long-lived dual emission with lifetimes in the ranges τEm,1 ≈ 40-300 ns and τEm,2 ≈ 100-200 ns, which are attributed to emission from the 3ILCT and 3MLCT manifolds, respectively.
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Affiliation(s)
- Martin Kaufmann
- School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
| | - Carolin Müller
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany.,Research Department Functional Interfaces, Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, Jena 07745, Germany
| | - Aoibhin A Cullen
- School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
| | - Michael P Brandon
- School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
| | - Benjamin Dietzek
- Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany.,Research Department Functional Interfaces, Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, Jena 07745, Germany.,Center for Energy and Environmental Chemistry Jena, Friedrich Schiller University Jena, Lessingstraße 8, Jena 07743, Germany
| | - Mary T Pryce
- School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
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12
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Cullen AA, Heintz K, O'Reilly L, Long C, Heise A, Murphy R, Karlsson J, Gibson E, Greetham GM, Towrie M, Pryce MT. A Time-Resolved Spectroscopic Investigation of a Novel BODIPY Copolymer and Its Potential Use as a Photosensitiser for Hydrogen Evolution. Front Chem 2020; 8:584060. [PMID: 33195076 PMCID: PMC7604388 DOI: 10.3389/fchem.2020.584060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 09/15/2020] [Indexed: 11/13/2022] Open
Abstract
A novel 4,4-difuoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) copolymer with diethynylbenzene has been synthesised, and its ability to act as a photosensitiser for the photocatalytic generation of hydrogen was investigated by time-resolved spectroscopic techniques spanning the ps- to ns-timescales. Both transient absorption and time-resolved infrared spectroscopy were used to probe the excited state dynamics of this photosensitising unit in a variety of solvents. These studies indicated how environmental factors can influence the photophysics of the BODIPY polymer. A homogeneous photocatalytic hydrogen evolution system has been developed using the BODIPY copolymer and cobaloxime which provides hydrogen evolution rates of 319 μmol h−1 g−1 after 24 h of visible irradiation.
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Affiliation(s)
- Aoibhín A Cullen
- School of Chemical Sciences, Dublin City University, Dublin, Ireland
| | - Katharina Heintz
- School of Chemical Sciences, Dublin City University, Dublin, Ireland
| | - Laura O'Reilly
- School of Chemical Sciences, Dublin City University, Dublin, Ireland
| | - Conor Long
- School of Chemical Sciences, Dublin City University, Dublin, Ireland
| | - Andreas Heise
- Department of Chemistry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Robert Murphy
- Department of Chemistry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Joshua Karlsson
- Energy Materials Laboratory, Department of Chemistry, School of Natural and Environmental Science, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Elizabeth Gibson
- Energy Materials Laboratory, Department of Chemistry, School of Natural and Environmental Science, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Gregory M Greetham
- Central Laser Facility, Science & Technology Facilities Council, Research Complex at Harwell, Rutherford Appleton Laboratory, Oxford, United Kingdom
| | - Michael Towrie
- Central Laser Facility, Science & Technology Facilities Council, Research Complex at Harwell, Rutherford Appleton Laboratory, Oxford, United Kingdom
| | - Mary T Pryce
- School of Chemical Sciences, Dublin City University, Dublin, Ireland
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13
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McMahon S, Rajagopal A, Amirjalayer S, Halpin Y, Fitzgerald-Hughes D, Buma WJ, Woutersen S, Long C, Pryce MT. Photo-activated CO-release in the amino tungsten Fischer carbene complex, [(CO) 5WC(NC 4H 8)Me], picosecond time resolved infrared spectroscopy, time-dependent density functional theory, and an antimicrobial study. J Inorg Biochem 2020; 208:111071. [PMID: 32434119 DOI: 10.1016/j.jinorgbio.2020.111071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 03/19/2020] [Accepted: 03/19/2020] [Indexed: 01/18/2023]
Abstract
Picosecond time-resolved infrared spectroscopy was used to probe the photo-induced early state dynamics preceding CO loss in the Fischer carbene complex, [(CO)5WC(NC4H8)CH3]. Time-dependent density functional theory calculations were employed to help in understanding the photochemical and photophysical processes leading to CO-loss. Electrochemical initiated CO release was quantified using gas chromatography. The potential of [(CO)5WC(NC4H8)CH3], as an antimicrobial agent under irradiation conditions was studied using a Staphylococcus aureus strain.
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Affiliation(s)
- Suzanne McMahon
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Ashwene Rajagopal
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland; Clinical Microbiology, Royal College of Surgeons in Ireland, RCSI Education and Research, Beaumont Hospital, Beaumont, Dublin 9, Ireland
| | - Saeed Amirjalayer
- Physikalisches Institut, Center for Nanotechnology (CeNTech) and Center for Multiscale Theory & Computation (CMTC), Westfälische Wilhelms-Universität Münster, Heisenbergstrasse 11, 48149 Münster, Germany
| | - Yvonne Halpin
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Deirdre Fitzgerald-Hughes
- Clinical Microbiology, Royal College of Surgeons in Ireland, RCSI Education and Research, Beaumont Hospital, Beaumont, Dublin 9, Ireland
| | - Wybren Jan Buma
- University of Amsterdam, Van't Hoff Institute for Molecular Sciences, Science Park 904, 1098 XH, Amsterdam, P.O. Box 94157, 1090 GD Amsterdam, The Netherlands
| | - Sander Woutersen
- University of Amsterdam, Van't Hoff Institute for Molecular Sciences, Science Park 904, 1098 XH, Amsterdam, P.O. Box 94157, 1090 GD Amsterdam, The Netherlands
| | - Conor Long
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Mary T Pryce
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
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14
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Põldme N, O'Reilly L, Fletcher I, Portoles J, Sazanovich IV, Towrie M, Long C, Vos JG, Pryce MT, Gibson EA. Photoelectrocatalytic H 2 evolution from integrated photocatalysts adsorbed on NiO. Chem Sci 2019; 10:99-112. [PMID: 30713622 PMCID: PMC6333170 DOI: 10.1039/c8sc02575d] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 10/03/2018] [Indexed: 01/09/2023] Open
Abstract
A new approach to increasing the faradaic efficiency of dye-sensitised photocathodes for H2 evolution from water, using integrated photocatalysts, furnished with ester groups on the peripheral ligands, [Ru(decb)2(bpt)PdCl(H2O)](PF6)2 (1) and [Ru(decb)2(2,5-bpp)PtI(CH3CN)](PF6)2 (2), (decb = 4,4'-diethylcarboxy-2,2'-bipyridine, bpp = 2,2':5',2''-terpyridine, bpt = 3,5-bis(2-pyridyl)-1,2,4-triazole) is described. Overall, 1|NiO is superior to previously reported photocathodes, producing photocurrent densities of 30-35 μA cm-2 at an applied bias of -0.2 V vs. Ag/AgCl over 1 hour of continuous white light irradiation, resulting in the generation of 0.41 μmol h-1 cm-2 of H2 with faradaic efficiencies of up to 90%. Furthermore, surface analysis of the photocathodes before and after photoelectrocatalysis revealed that the ruthenium bipyridyl chromophore and Pd catalytic centre (1) were photochemically stable, highlighting the benefits of the approach towards robust, hybrid solar-to-fuel devices.
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Affiliation(s)
- Nils Põldme
- School of Natural and Environmental Science , Newcastle University , Newcastle upon Tyne , NE1 7RU , UK .
| | - Laura O'Reilly
- School of Chemical Sciences , Dublin City University , Dublin 9 , Ireland .
| | - Ian Fletcher
- NEXUS XPS Laboratory , Newcastle University , Stephenson Building , Newcastle upon Tyne , NE1 7RU , UK .
| | - Jose Portoles
- NEXUS XPS Laboratory , Newcastle University , Stephenson Building , Newcastle upon Tyne , NE1 7RU , UK .
| | - Igor V Sazanovich
- Central Laser Facility , Research Complex at Harwell , STFC Rutherford Appleton Laboratory , Harwell Campus , Didcot , Oxfordshire OX11 0QX , UK .
| | - Michael Towrie
- Central Laser Facility , Research Complex at Harwell , STFC Rutherford Appleton Laboratory , Harwell Campus , Didcot , Oxfordshire OX11 0QX , UK .
| | - Conor Long
- School of Chemical Sciences , Dublin City University , Dublin 9 , Ireland .
| | - Johannes G Vos
- School of Chemical Sciences , Dublin City University , Dublin 9 , Ireland .
| | - Mary T Pryce
- School of Chemical Sciences , Dublin City University , Dublin 9 , Ireland .
| | - Elizabeth A Gibson
- School of Natural and Environmental Science , Newcastle University , Newcastle upon Tyne , NE1 7RU , UK .
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15
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Manton JC, Cerpentier FJR, Harvey EC, Clark IP, Greetham GM, Long C, Pryce MT. Photochemical or electrochemical bond breaking – exploring the chemistry of (μ 2-alkyne)Co 2(CO) 6 complexes using time-resolved infrared spectroscopy, spectro-electrochemical and density functional methods. Dalton Trans 2019; 48:14642-14652. [DOI: 10.1039/c9dt03006a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photoassisted Pauson–Khand reaction involves the formation of a high-spin diradical species and not CO loss as previously thought.
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Affiliation(s)
| | | | - Emma C. Harvey
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Ian P. Clark
- Central Laser Facility
- Science & Technology Facilities Council
- Research Complex at Harwell
- Rutherford Appleton Laboratory
- Didcot
| | - Gregory M. Greetham
- Central Laser Facility
- Science & Technology Facilities Council
- Research Complex at Harwell
- Rutherford Appleton Laboratory
- Didcot
| | - Conor Long
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Mary T. Pryce
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
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16
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O'Reilly L, Pan Q, Das N, Wenderich K, Korterik JP, Vos JG, Pryce MT, Huijser A. Hydrogen-Generating Ru/Pt Bimetallic Photocatalysts Based on Phenyl-Phenanthroline Peripheral Ligands. Chemphyschem 2018; 19:3084-3091. [PMID: 30221834 DOI: 10.1002/cphc.201800658] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Indexed: 12/13/2022]
Abstract
Recent studies on hydrogen-generating supramolecular bimetallic photocatalysts indicate a more important role of the peripheral ligands than expected, motivating us to design a Ru/Pt complex with 4,7-diphenyl-1,10-phenanthroline peripheral ligands. Photoinduced intra- and inter-ligand internal conversion processes have been investigated using transient absorption spectroscopy, spanning the femto- to nanosecond timescale. After photoexcitation and ultrafast intersystem crossing, triplet states localised on either the peripheral ligands or on the bridging ligand/catalytic unit are populated in a non-equilibrated way. Time-resolved photoluminescence demonstrates that the lifetime for the Ru/Pt dinuclear species (795±8 ns) is significantly less than that of the mononuclear analogue (1375±20 ns). The photocatalytic studies show modest hydrogen turnover numbers, which is possibly caused by the absence of an excited state equilibrium. Finally, we identify challenges that must be overcome to further develop this class of photocatalysts and propose directions for future research.
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Affiliation(s)
- Laura O'Reilly
- SRC for Solar Energy Conversion, School of Chemical Sciences, Dublin City University Glasnevin, Dublin 9, Ireland
| | - Qing Pan
- Photocatalytic Synthesis and Optical Sciences groups, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - Nivedita Das
- SRC for Solar Energy Conversion, School of Chemical Sciences, Dublin City University Glasnevin, Dublin 9, Ireland
| | - Kasper Wenderich
- Photocatalytic Synthesis and Optical Sciences groups, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - Jeroen P Korterik
- Photocatalytic Synthesis and Optical Sciences groups, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - Johannes G Vos
- SRC for Solar Energy Conversion, School of Chemical Sciences, Dublin City University Glasnevin, Dublin 9, Ireland
| | - Mary T Pryce
- SRC for Solar Energy Conversion, School of Chemical Sciences, Dublin City University Glasnevin, Dublin 9, Ireland
| | - Annemarie Huijser
- Photocatalytic Synthesis and Optical Sciences groups, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
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17
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Frayne L, Das N, Paul A, Amirjalayer S, Buma WJ, Woutersen S, Long C, Vos JG, Pryce MT. Photo- and Electrochemical Properties of a CO2
Reducing Ruthenium-Rhenium Quaterpyridine-Based Catalyst. CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201700197] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Liam Frayne
- School of Chemical Sciences; Dublin City University; Glasnevin, Dublin 9 Ireland
| | - Nivedita Das
- School of Chemical Sciences; Dublin City University; Glasnevin, Dublin 9 Ireland
| | - Avishek Paul
- School of Chemical Sciences; Dublin City University; Glasnevin, Dublin 9 Ireland
| | - Saeed Amirjalayer
- Physikalisches Institut; Westfälische Wilhelms-Universität Münster; Willhelm-Klemm-Strasse 10 48149 Münster Germany
- Center for Nanotechnology (CeNTech); Heisenbergstrasse 11 48149 Münster Germany
| | - Wybren J. Buma
- Van't Hoff Institute for Molecular Sciences; University of Amsterdam; Science Park 904, 1098 XH, Amsterdam 1090 GD Amsterdam The Netherlands
| | - Sander Woutersen
- Van't Hoff Institute for Molecular Sciences; University of Amsterdam; Science Park 904, 1098 XH, Amsterdam 1090 GD Amsterdam The Netherlands
| | - Conor Long
- School of Chemical Sciences; Dublin City University; Glasnevin, Dublin 9 Ireland
| | - Johannes G. Vos
- School of Chemical Sciences; Dublin City University; Glasnevin, Dublin 9 Ireland
| | - Mary T. Pryce
- School of Chemical Sciences; Dublin City University; Glasnevin, Dublin 9 Ireland
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18
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Soman S, Younis HM, Browne WR, Vos JG, Pryce MT. Synthesis and Isotope Effects on the Excited State Properties of N^
N Bound [Ir(polypyridyl)2
Cl2
]PF6
Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700924] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Suraj Soman
- SRC for Solar Energy Conversion; School of Chemical Sciences; Dublin City University; 9 Dublin Ireland
| | - Hamid M. Younis
- SRC for Solar Energy Conversion; School of Chemical Sciences; Dublin City University; 9 Dublin Ireland
| | - Wesley R. Browne
- Molecular Inorganic Chemistry, Stratingh Institute for chemistry; Faculty of Science and Engineering; University of Groningen; Nijenborgh 4 9747AG Groningen The Netherlands
| | - Johannes G. Vos
- SRC for Solar Energy Conversion; School of Chemical Sciences; Dublin City University; 9 Dublin Ireland
| | - Mary T. Pryce
- SRC for Solar Energy Conversion; School of Chemical Sciences; Dublin City University; 9 Dublin Ireland
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19
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Das N, Bindra GS, Paul A, Vos JG, Schulz M, Pryce MT. Enhancing Photocatalytic Hydrogen Generation: the Impact of the Peripheral Ligands in Ru/Pd and Ru/Pt Complexes. Chemistry 2017; 23:5330-5337. [DOI: 10.1002/chem.201605980] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Nivedita Das
- Strategic Research Cluster for Solar Energy Conversion, School of Chemical Sciences; Dublin City University; Dublin 9 Ireland
| | - Gurmeet Singh Bindra
- Strategic Research Cluster for Solar Energy Conversion, School of Chemical Sciences; Dublin City University; Dublin 9 Ireland
- Current address: Exigence Technologies, Inc.; 200-135 Innovation Drive Winnipeg Manitoba R3T 6A8 Canada
| | - Avishek Paul
- Strategic Research Cluster for Solar Energy Conversion, School of Chemical Sciences; Dublin City University; Dublin 9 Ireland
| | - Johannes G. Vos
- Strategic Research Cluster for Solar Energy Conversion, School of Chemical Sciences; Dublin City University; Dublin 9 Ireland
| | - Martin Schulz
- Friedrich Schiller University Jena; Institute of Physical Chemistry; Helmholtzweg 4 07743 Jena Germany
- Leibniz Institute of Photonic Technology (IPHT); Albert-Einstein-Strasse 9 07745 Jena Germany
| | - Mary T. Pryce
- Strategic Research Cluster for Solar Energy Conversion, School of Chemical Sciences; Dublin City University; Dublin 9 Ireland
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20
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Kowacs T, O'Reilly L, Pan Q, Huijser A, Lang P, Rau S, Browne WR, Pryce MT, Vos JG. Subtle Changes to Peripheral Ligands Enable High Turnover Numbers for Photocatalytic Hydrogen Generation with Supramolecular Photocatalysts. Inorg Chem 2016; 55:2685-90. [PMID: 26925834 DOI: 10.1021/acs.inorgchem.5b01752] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The photocatalytic generation of hydrogen (H2) from protons by two cyclometalated ruthenium-platinum polypyridyl complexes, [Ru(bpy)2(2,5-bpp)PtIS](2+) (1) and [Ru(dceb)2(2,5-bpp)PtIS](2+) (2) [where bpy = 2,2'-bipyridine, 2,5-bpp = 2,2',5',2″-terpyridine, dceb = 4,4'-di(carboxyethyl)bipyridine, and S = solvent], is reported. Turnover numbers (TONs) for H2 generation were increased by nearly an order of magnitude by the introduction of carboxyethyl ester units, i.e., from 80 for 1P to 650 for 2P after 6 h of irradiation, with an early turnover frequency (TOF) increasing from 15 to 200 h(-1). The TON and TOF values for 2P are among the highest reported to date for supramolecular photocatalysts. The increase correlates with stabilization of the excited states localized on the peripheral ligands of the light-harvesting Ru(II) center.
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Affiliation(s)
- Tanja Kowacs
- Institut für Anorganische Chemie I, Universität Ulm , Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Laura O'Reilly
- SRC for Solar Energy Conversion, School of Chemical Sciences, Dublin City University , Dublin 9, Ireland
| | - Qing Pan
- Optical Sciences group, MESA + Institute for Nanotechnology, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Annemarie Huijser
- Optical Sciences group, MESA + Institute for Nanotechnology, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Philipp Lang
- Institut für Anorganische Chemie I, Universität Ulm , Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Sven Rau
- Institut für Anorganische Chemie I, Universität Ulm , Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Wesley R Browne
- Stratingh Institute for Chemistry, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Mary T Pryce
- SRC for Solar Energy Conversion, School of Chemical Sciences, Dublin City University , Dublin 9, Ireland
| | - Johannes G Vos
- SRC for Solar Energy Conversion, School of Chemical Sciences, Dublin City University , Dublin 9, Ireland
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21
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Pan Q, Freitag L, Kowacs T, Falgenhauer JC, Korterik JP, Schlettwein D, Browne WR, Pryce MT, Rau S, González L, Vos JG, Huijser A. Peripheral ligands as electron storage reservoirs and their role in enhancement of photocatalytic hydrogen generation. Chem Commun (Camb) 2016; 52:9371-4. [DOI: 10.1039/c6cc05222c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The contrasting early-time photodynamics of two related Ru/Pt photocatalysts are reported.
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22
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McMahon S, Amirjalayer S, Buma WJ, Halpin Y, Long C, Rooney AD, Woutersen S, Pryce MT. An investigation into the photochemistry of, and the electrochemically induced CO-loss from, [(CO)5MC(OMe)Me](M = Cr or W) using low-temperature matrix isolation, picosecond infrared spectroscopy, cyclic voltammetry, and time-dependent density functional theory. Dalton Trans 2015; 44:15424-34. [PMID: 26089130 DOI: 10.1039/c5dt01568e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photophysics and photochemistry of [(CO)5MC(OMe)Me] (M = Cr or W) were investigated using picosecond time-resolved infrared spectroscopy (M = Cr or W), low-temperature matrix isolation techniques (M = Cr), and time-dependent density functional calculations (M = Cr or W). These studies provide unambiguous evidence for the photochemical formation of a long-lived, 18-electron metallaketene species capable of acting as a synthetically useful intermediate. For the Cr complex, an intermediate metallacyclopropanone singlet excited state was detected on the reaction path to the metallaketene species. This metallacyclopropanone excited state species has a lifetime of less than 100 ps and a characteristic bridging carbonyl band at 1770 cm(-1). The tungsten ketene species was also detected but in contrast to the chromium system, this forms directly from a low-lying triplet excited state. The electrochemical release of CO showed a greater efficiency for the chromium complex when compared to the tungsten.
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Affiliation(s)
- Suzanne McMahon
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
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23
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Abstract
The covalent coupling of (5,10,15,20-tetrabromothien-2-ylporphyrinato)zinc(II) (TBrThP) molecules on the Ag(111) surface has been investigated under ultra-high-vacuum conditions, using scanning tunnelling microscopy and x-ray photoelectron spectroscopy. The findings provide atomic-level insight into surface-confined Ullmann coupling of thiophene substituted porphyrins, analyzing the progression of organometallic intermediate to final coupled state. Adsorption of the TBrThP molecules on the Ag(111) surface at room temperature is found to result in the reductive dehalogenation of the bromothienyl substituents and the subsequent formation of single strand and crosslinked coordination networks. The coordinated substrate atoms bridge the proximal thienyl groups of the organometallic intermediate, while the cleaved bromine atoms are bound on the adjacent Ag(111) surface. The intermediate complex displays a thermal lability at ∼423 K that results in the dissociation of the proximal thienyl groups with the concomitant loss of the surface bound bromine. At the thermally induced dissociation of the intermediate complex the resultant thienylporphyrin derivatives covalently couple, leading to the formation of a polymeric network of thiophene linked and meso-meso fused porphyrins.
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Affiliation(s)
- J P Beggan
- School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
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24
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Paul A, Das N, Halpin Y, Vos JG, Pryce MT. Carboxy derivatised Ir(iii) complexes: synthesis, electrochemistry, photophysical properties and photocatalytic hydrogen generation. Dalton Trans 2015; 44:10423-30. [DOI: 10.1039/c5dt00324e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this contribution the synthesis and characterisation of a series of novel mixed ligand iridium(iii) complexes, functionalised with a carboxy ester or phosphonate groups are reported.
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Affiliation(s)
- Avishek Paul
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Nivedita Das
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Yvonne Halpin
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Johannes G. Vos
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Mary T. Pryce
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
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25
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Kowacs T, Pan Q, Lang P, O'Reilly L, Rau S, Browne WR, Pryce MT, Huijser A, Vos JG. Supramolecular bimetallic assemblies for photocatalytic hydrogen generation from water. Faraday Discuss 2015; 185:143-70. [DOI: 10.1039/c5fd00068h] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of supramolecular assemblies of the type [Ru(L-L)2(L′-L)MX2)]n+ are reported where L-L is 2,2′-bipyridine (bipy), 4,4′-di-tetra-butyl-bipyridine (tbbipy) or 4,4′-diethoxycarbonyl-2,2′-bipyridine (dceb), L-L′ is tetrapyrido[3,2-a:2′,3′-c:3′′,2′′-h:2′′′,3′′′-j]phenazine (tpphz), 2,2′:5′,2′′-terpyridine (2,5-bpp), 2,2′:6′,2′′-terpyridine, (2,6-bpp), 2,5-di(pyridine-2-yl)pyrazine (2,5-dpp) or 2,3-di(pyridine-2-yl)pyrazine (2,3-dpp), and MX2 is PdCl2, PtCl2 or PtI2. The photocatalytic behaviour with respect to hydrogen generation of these compounds and their ultrafast photophysical properties are discussed as a function of the nature of the peripheral ligands, the bridging ligands and the catalytic centre. The results obtained show how differences in the chemical composition of the photocatalysts can affect intramolecular photoinduced electron transfer processes and the overall photocatalytic efficiency.
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Affiliation(s)
- Tanja Kowacs
- Institut für Anorganische Chemie I
- Universität Ulm
- 89081 Ulm
- Germany
| | - Qing Pan
- Optical Sciences group
- MESA+ Institute for Nanotechnology
- University of Twente
- Enschede
- The Netherlands
| | - Philipp Lang
- Institut für Anorganische Chemie I
- Universität Ulm
- 89081 Ulm
- Germany
| | - Laura O'Reilly
- SRC for Solar Energy Conversion
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Sven Rau
- Institut für Anorganische Chemie I
- Universität Ulm
- 89081 Ulm
- Germany
| | - Wesley R. Browne
- Stratingh Institute for Chemistry
- Faculty of Mathematics and Natural Sciences
- University of Groningen
- Groningen
- The Netherlands
| | - Mary T. Pryce
- SRC for Solar Energy Conversion
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Annemarie Huijser
- Optical Sciences group
- MESA+ Institute for Nanotechnology
- University of Twente
- Enschede
- The Netherlands
| | - Johannes G. Vos
- SRC for Solar Energy Conversion
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
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26
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Manton JC, Amirjalayer S, Coleman AC, McMahon S, Harvey EC, Greetham GM, Clark IP, Buma WJ, Woutersen S, Pryce MT, Long C. Excited state evolution towards ligand loss and ligand chelation at group 6 metal carbonyl centres. Dalton Trans 2014; 43:17797-805. [PMID: 25093429 DOI: 10.1039/c4dt01544d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photochemistry and photophysics of three model "half-sandwich" complexes (η(6)-benzophenone)Cr(CO)3, (η(6)-styrene)Cr(CO)3, and (η(6)-allylbenzene)Cr(CO)3 were investigated using pico-second time-resolved infrared spectroscopy and time-dependent density functional theory methods. The (η(6)-benzophenone)Cr(CO)3 complex was studied using two excitation wavelengths (470 and 320 nm) while the remaining complexes were irradiated using 400 nm light. Two independent excited states were detected spectroscopically for each complex, one an unreactive excited state of metal-to-arene charge-transfer character and the other with metal-to-carbonyl charge transfer character. This second excited state leads to an arrested release of CO on the pico-second time-scale. Low-energy excitation (470 nm) of (η(6)-benzophenone)Cr(CO)3 populated only the unreactive excited state which simply relaxes to the parent complex. Higher energy irradiation (320 nm) induced CO-loss. Irradiation of (η(6)-styrene)Cr(CO)3, or (η(6)-allylbenzene)Cr(CO)3 at 400 nm provided evidence for the simultaneous population of both the reactive and unreactive excited states. The efficiency at which the unreactive excited state is populated depends on the degree of conjugation of the substituent with the arene π-system and this affects the efficiency of the CO-loss process. The quantum yield of CO-loss is 0.50 for (η(6)-allylbenzene)Cr(CO)3 and 0.43 for (η(6)-styrene)Cr(CO)3. These studies provide evidence for the existence of two photophysical routes to CO loss, a minor ultrafast route and an arrested mechanism involving the intermediate population of a reactive excited state. This reactive excited state either relaxes to reform the parent species or eject CO. Thus the quantum yield of the CO-loss is strongly dependent on the excitation wavelength. Time-dependent density functional theory calculations confirm that the state responsible for ultrafast CO-loss has significant metal-centred character while the reactive state responsible for the arrested CO-loss has significant metal-to-carbonyl charge-transfer character. The CO-loss product (η(6)-allylbenzene)Cr(CO)2 formed following irradiation of (η(6)-allylbenzene)Cr(CO)3 reacts further with the pendent alkenyl group to form the chelate product (η(6),η(2)-allylbenzene)Cr(CO)2.
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Affiliation(s)
- Jennifer C Manton
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
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27
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Harry AG, Butler WE, Manton JC, Pryce MT, O'Donovan N, Crown J, Rai DK, Kenny PT. The synthesis, structural characterization and in vitro anticancer activity of novel 1-alkyl-1′-N-meta-(ferrocenyl) benzoyl dipeptide esters and novel 1-alkyl-1′-N-ortho-(ferrocenyl) benzoyl dipeptide esters. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.04.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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McMahon S, Rochford J, Halpin Y, Manton JC, Harvey EC, Greetham GM, Clark IP, Rooney AD, Long C, Pryce MT. Controlled CO release using photochemical, thermal and electrochemical approaches from the amino carbene complex [(CO)5CrC(NC4H8)CH3]. Phys Chem Chem Phys 2014; 16:21230-3. [DOI: 10.1039/c4cp03758h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Harvey EC, Areephong J, Cafolla AA, Long C, Browne WR, Feringa BL, Pryce MT. Incorporating Cobalt Carbonyl Moieties onto Ethynylthiophene-Based Dithienylcyclopentene Switches. 2. Electro- and Spectroelectrochemical Properties. Organometallics 2014. [DOI: 10.1021/om4005719] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Jetsuda Areephong
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | | | | | - Wesley R. Browne
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Ben L. Feringa
- Stratingh
Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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30
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Soman S, Manton JC, Inglis JL, Halpin Y, Twamley B, Otten E, Browne WR, De Cola L, Vos JG, Pryce MT. New synthetic pathways to the preparation of near-blue emitting heteroleptic Ir(III)N6 coordinated compounds with microsecond lifetimes. Chem Commun (Camb) 2014; 50:6461-3. [PMID: 24809470 DOI: 10.1039/c4cc02249a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A high yield synthetic route for the preparation of N6 coordinated heteroleptic Ir(III) complexes using bidentate polypyridyl type ligands is described. The complexes are near-blue emitters and show microsecond emission lifetimes, high emission quantum yields and have two quasi-reversible reduction processes between -1.0 and -1.3 V vs. Ag/AgCl.
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Affiliation(s)
- Suraj Soman
- SRC for Solar Energy Conversion, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
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31
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Harry AG, Butler WE, Manton JC, Pryce MT, O'Donovan N, Crown J, Rai DK, Kenny PT. The synthesis, structural characterization and in vitro anti-cancer activity of novel 1-alkyl-1′-N-para-(ferrocenyl) benzoyl dipeptide esters. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.01.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Harvey EC, Areephong J, Cafolla AA, Long C, Browne WR, Feringa BL, Pryce MT. Incorporating Cobalt Carbonyl Moieties onto Ethynylthiophene-Based Dithienylcyclopentene Switches. 1. Photochemistry. Organometallics 2014. [DOI: 10.1021/om400570c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Emma C. Harvey
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Jetsuda Areephong
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
| | | | - Conor Long
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Wesley R. Browne
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
| | - Ben L. Feringa
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
| | - Mary T. Pryce
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
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33
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Manton JC, Long C, Vos JG, Pryce MT. Porphyrin–cobaloxime complexes for hydrogen production, a photo- and electrochemical study, coupled with quantum chemical calculations. Dalton Trans 2014; 43:3576-83. [DOI: 10.1039/c3dt53166j] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Manton JC, Long C, Vos JG, Pryce MT. A photo- and electrochemical investigation of BODIPY–cobaloxime complexes for hydrogen production, coupled with quantum chemical calculations. Phys Chem Chem Phys 2014; 16:5229-36. [DOI: 10.1039/c3cp55347g] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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35
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Harry AG, Murphy J, Butler WE, Tiedt R, Mooney Á, Manton JC, Pryce MT, O'Donovan N, Walsh N, Crown J, Rai DK, Kenny PT. The synthesis, structural characterization and in vitro anti-cancer activity of novel N-{6-(ferrocenyl) ethynyl-2-naphthoyl} amino acid and dipeptide ethyl esters. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2012.11.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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36
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Leigh V, Ghattas W, Lalrempuia R, Müller-Bunz H, Pryce MT, Albrecht M. Synthesis, Photo-, and Electrochemistry of Ruthenium Bis(bipyridine) Complexes Comprising a N-heterocyclic Carbene Ligand. Inorg Chem 2013; 52:5395-402. [DOI: 10.1021/ic400347r] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Vivienne Leigh
- School of Chemistry & Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Wadih Ghattas
- School of Chemistry & Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Ralte Lalrempuia
- School of Chemistry & Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Helge Müller-Bunz
- School of Chemistry & Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Mary T. Pryce
- School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Martin Albrecht
- School of Chemistry & Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
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37
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Bindra GS, Schulz M, Paul A, Groarke R, Soman S, Inglis JL, Browne WR, Pfeffer MG, Rau S, MacLean BJ, Pryce MT, Vos JG. The role of bridging ligand in hydrogen generation by photocatalytic Ru/Pd assemblies. Dalton Trans 2013; 41:13050-9. [PMID: 23014910 DOI: 10.1039/c2dt30948c] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The synthesis and characterisation of two terpyridine based ruthenium/palladium heteronuclear compounds are presented. The photocatalytic behaviour of the Ru/Pd complex containing the linear 2,2':5',2''-terpyridine bridge (1a) and its analogue the non-linear 2,2':6',2''-terpyridine bridge (2a) are compared together with the respective mononuclear complexes 1 and 2. Irradiation of 1a with visible light (e.g., 470 nm) results in the photocatalytic generation of dihydrogen gas. Photocatalysis was not observed with complex 2a by contrast. A comparison with the photocatalytic behaviour of the precursors 1 and 2 indicates, that while for 1a the photocatalysis is an intramolecular process, for the mononuclear precursors it is intermolecular. The photophysical and electrochemical properties of the mono- and heterobinuclear compounds are compared. Raman spectroscopy and DFT calculations indicate that there are substantial differences in the nature of the lowest energy (3)MLCT states of 1a and 2a, from which the contrasting photocatalytic activities of the complexes can be understood.
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Affiliation(s)
- Gurmeet Singh Bindra
- SRC for Solar Energy Conversion, School of Chemical Sciences, Dublin City University, Glasnevin, Dublin, Ireland
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38
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Brennan C, Draksharapu A, Browne WR, McGarvey JJ, Vos JG, Pryce MT. Unexpected reversible pyrazine based methylation in a Ru(ii) complex bearing a pyrazin-2′-yl-1,2,4-triazolato ligand and its effect on acid/base and photophysical properties. Dalton Trans 2013; 42:2546-55. [DOI: 10.1039/c2dt31589k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Gibson EA, Awais M, Dini D, Dowling DP, Pryce MT, Vos JG, Boschloo G, Hagfeldt A. Dye sensitised solar cells with nickel oxide photocathodes prepared via scalable microwave sintering. Phys Chem Chem Phys 2013; 15:2411-20. [DOI: 10.1039/c2cp43592f] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Halpin Y, Pryce MT, Rau S, Dini D, Vos JG. Recent progress in the development of bimetallic photocatalysts for hydrogen generation. Dalton Trans 2013; 42:16243-54. [DOI: 10.1039/c3dt52319e] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Paul A, Connolly D, Schulz M, Pryce MT, Vos JG. Effect of Water during the Quantitation of Formate in Photocatalytic Studies on CO2 Reduction in Dimethylformamide. Inorg Chem 2012; 51:1977-9. [DOI: 10.1021/ic202121s] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Avishek Paul
- SRC for
Solar Energy Conversion and ‡Irish Separation Science Cluster, School
of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Damian Connolly
- SRC for
Solar Energy Conversion and ‡Irish Separation Science Cluster, School
of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Martin Schulz
- SRC for
Solar Energy Conversion and ‡Irish Separation Science Cluster, School
of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Mary T. Pryce
- SRC for
Solar Energy Conversion and ‡Irish Separation Science Cluster, School
of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Johannes G. Vos
- SRC for
Solar Energy Conversion and ‡Irish Separation Science Cluster, School
of Chemical Sciences, Dublin City University, Dublin 9, Ireland
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42
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Clark IP, George MW, Greetham GM, Harvey EC, Long C, Manton JC, McArdle H, Pryce MT. Photochemistry of (η6-Anisole)Cr(CO)3 and (η6-Thioanisole)Cr(CO)3: Evidence for a Photoinduced Haptotropic Shift of the Thioanisole Ligand, a Picosecond Time-Resolved Infrared Spectroscopy and Density Functional Theory Investigation. J Phys Chem A 2012; 116:962-9. [DOI: 10.1021/jp211726j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Ian P. Clark
- Central Laser Facility, Science & Technology Facilities Council, Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot, OX11 0QX, United Kingdom
| | - Michael W. George
- School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Gregory M. Greetham
- Central Laser Facility, Science & Technology Facilities Council, Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot, OX11 0QX, United Kingdom
| | - Emma C. Harvey
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Conor Long
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | | | - Hazel McArdle
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Mary T. Pryce
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
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43
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Soman S, Singh Bindra G, Paul A, Groarke R, Manton JC, Connaughton FM, Schulz M, Dini D, Long C, Pryce MT, Vos JG. Wavelength dependent photocatalytic H2 generation using iridium–Pt/Pd complexes. Dalton Trans 2012; 41:12678-80. [DOI: 10.1039/c2dt32028b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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George MW, Long C, Pryce MT, Sun XZ, Vuong KQ. A Combined Theoretical and Experimental Study on the Wavelength-Dependent Photophysics of (η6-benzene)Mo(CO)3. Organometallics 2011. [DOI: 10.1021/om200861q] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Michael W. George
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Conor Long
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Mary T. Pryce
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Xue-Zhong Sun
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Khuong Q. Vuong
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
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45
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Clark IP, George MW, Greetham GM, Harvey EC, Long C, Manton JC, Pryce MT. Photochemistry of (η6-Arene)Cr(CO)3 (Arene = Methylbenzoate, Naphthalene, or Phenanthrene) in n-Heptane Solution: Population of Two Excited States Following 400 nm Excitation As Detected by Picosecond Time-Resolved Infrared Spectroscopy. J Phys Chem A 2011; 115:2985-93. [DOI: 10.1021/jp112168u] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Ian P. Clark
- Central Laser Facility, Science & Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX, United Kingdom
| | - Michael W. George
- School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Gregory M. Greetham
- Central Laser Facility, Science & Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX, United Kingdom
| | - Emma C. Harvey
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Conor Long
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | | | - Mary T. Pryce
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
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46
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Atkin AJ, Lynam JM, Moulton BE, Sawle P, Motterlini R, Boyle NM, Pryce MT, Fairlamb IJS. Modification of the deoxy-myoglobin/carbonmonoxy-myoglobin UV-vis assay for reliable determination of CO-release rates from organometallic carbonyl complexes. Dalton Trans 2011; 40:5755-61. [DOI: 10.1039/c0dt01809k] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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47
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Singh Bindra G, Schulz M, Paul A, Soman S, Groarke R, Inglis J, Pryce MT, Browne WR, Rau S, Maclean BJ, Vos JG. The effect of peripheral bipyridine ligands on the photocatalytic hydrogen production activity of Ru/Pd catalysts. Dalton Trans 2011; 40:10812-4. [DOI: 10.1039/c1dt11241d] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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49
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Boyle NM, Coleman AC, Long C, Ronayne KL, Browne WR, Feringa BL, Pryce MT. Evidence for Cobalt−Cobalt Bond Homolysis and Wavelength-Dependent CO Loss in (μ2-Alkyne)Co2(CO)6 Complexes. Inorg Chem 2010; 49:10214-6. [DOI: 10.1021/ic101321u] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicola M. Boyle
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | | | - Conor Long
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Kate L. Ronayne
- Lasers for Science Facility, The Rutherford Appelton Laboratories, Didcot, Oxfordshire, U.K
| | - Wesley R. Browne
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Ben L. Feringa
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Mary T. Pryce
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
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50
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Clark IP, George MW, Greetham GM, Harvey EC, Long C, Manton JC, Pryce MT. Excited State Dynamics and Activation Parameters of Remarkably Slow Photoinduced CO Loss from (η6-Benzene)Cr(CO)3 in n-Heptane Solution: A DFT and Picosecond-Time-Resolved Infrared Study. J Phys Chem A 2010; 114:11425-31. [DOI: 10.1021/jp106290j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ian P. Clark
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland, Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX, United Kingdom, and School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Michael W. George
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland, Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX, United Kingdom, and School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Gregory M. Greetham
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland, Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX, United Kingdom, and School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Emma C. Harvey
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland, Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX, United Kingdom, and School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Conor Long
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland, Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX, United Kingdom, and School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Jennifer C. Manton
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland, Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX, United Kingdom, and School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Mary T. Pryce
- School of Chemical Sciences, Dublin City University, Dublin 9, Ireland, Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX, United Kingdom, and School of Chemistry, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
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