1
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Zhou X, Powell BJ. Quantitative calculations of the non-radiative rate of phosphorescent Ir(III) complexes. Phys Chem Chem Phys 2020; 22:27348-27356. [PMID: 33231236 DOI: 10.1039/d0cp04709k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
It has recently been proposed that the dominant non-radiative decay mechanism in blue Ir(iii) phosphors at room temperature is due to the low-lying non-radiative metal-centred triplet states. These are populated thermally via an activated transition from the highly radiative metal-to-ligand-charge-transfer states that are initially populated due to intersystem crossing following the radiative or electronic excitation of the phosphor. We apply transition state theory to quantitatively calculate the non-radiative decay rate of a family of Ir(iii) complexes containing N-heterocyclic carbene (NHC) ligands. We compare the, computationally inexpensive, one-dimensional theory with the, more accurate, multi-dimensional theory. Both methods find a non-radiative rate with an Arrhenius form (knr = kae-ΔE/kBT). The pre-exponential factors, ka, and activation energies, ΔE, are evaluated via density functional theory (DFT). The multi-dimensional theory shows that there is an order of magnitude variation in ka within this family of materials (between 3 × 1011 s-1 and 3 × 1012 s-1). This is not captured by the one-dimensional theory, which predicts very uniform rate constants in the middle of this range (∼1012 s-1). Nevertheless, the activated process involved, and the linear relationship between ka and knr, mean that ka plays a subtle role in determining knr. Consistent with this we find that both methods capture the trend observed experimentally in the non-radiative rates. Furthermore, the magnitude of the calculated knr is similar in both methods and in good agreement with experimental values [except for one complex with a very shallow activation barrier (<0.1 eV)]. It has previously been demonstrated that radiative decay rates can be accurately calculated from DFT. Combined with our results for the non-radiative rates, this implies that DFT methods can accurately predict the emission efficiency in Ir(iii) phosphors. Therefore, DFT calculations are both fast and accurate enough to play a significant role in the design of new deep blue Ir(iii) phosphors with high emission efficiency. Even the one-dimensional theory provides reasonable agreement with experiment. This suggests that a funneling approach - where only the best performing molecules, according to the one-dimensional theory, are studied in the more laborious multi-dimensional framework - could be a powerful strategy for designing active materials for phosphorescent organic light-emitting diodes (PHOLEDs) from first principles.
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Affiliation(s)
- Xiuwen Zhou
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia.
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2
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Bezzubov SI, Zharinova IS, Khusyainova AA, Kiselev YM, Taydakov IV, Varaksina EA, Metlin MT, Tobohova AS, Korshunov VM, Kozyukhin SA, Dolzhenko VD. Aromatic β‐Diketone as a Novel Anchoring Ligand in Iridium(III) Complexes for Dye‐Sensitized Solar Cells. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000372] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Stanislav I. Bezzubov
- Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences Leninskii pr. 31 119991 Moscow Russia
| | - Irina S. Zharinova
- Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences Leninskii pr. 31 119991 Moscow Russia
- Department of Chemistry Lomonosov Moscow State University Lenin's hills 1 119991 Moscow Russia
| | - Alfiya A. Khusyainova
- Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences Leninskii pr. 31 119991 Moscow Russia
- Department of Chemistry Lomonosov Moscow State University Lenin's hills 1 119991 Moscow Russia
| | - Yuri M. Kiselev
- Department of Chemistry Lomonosov Moscow State University Lenin's hills 1 119991 Moscow Russia
| | - Ilya V. Taydakov
- P.N. Lebedev Physical Institute Russian Academy of Sciences 53 Leninsky Prospect 119991 Moscow Russia
| | - Evgenia A. Varaksina
- P.N. Lebedev Physical Institute Russian Academy of Sciences 53 Leninsky Prospect 119991 Moscow Russia
| | - Mikhail T. Metlin
- P.N. Lebedev Physical Institute Russian Academy of Sciences 53 Leninsky Prospect 119991 Moscow Russia
| | - Aiyyna S. Tobohova
- P.N. Lebedev Physical Institute Russian Academy of Sciences 53 Leninsky Prospect 119991 Moscow Russia
- Moscow Institute of Physics and Technology State University Institutsky per. 9 141700 Dolgoprudny Moscow Region Russia
| | - Vladislav M. Korshunov
- P.N. Lebedev Physical Institute Russian Academy of Sciences 53 Leninsky Prospect 119991 Moscow Russia
- Bauman Moscow State Technical University 2‐ya Baumanskaya Str. 5/1 105005 Moscow Russia
| | - Sergei A. Kozyukhin
- Kurnakov Institute of General and Inorganic Chemistry Russian Academy of Sciences Leninskii pr. 31 119991 Moscow Russia
| | - Vladimir D. Dolzhenko
- Department of Chemistry Lomonosov Moscow State University Lenin's hills 1 119991 Moscow Russia
- N.D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky pr. 47 119991 Moscow Russia
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3
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Giménez N, Lalinde E, Lara R, Moreno MT. Design of Luminescent, Heteroleptic, Cyclometalated Pt
II
and Pt
IV
Complexes: Photophysics and Effects of the Cyclometalated Ligands. Chemistry 2019; 25:5514-5526. [DOI: 10.1002/chem.201806240] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Indexed: 01/31/2023]
Affiliation(s)
- Nora Giménez
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ)Universidad de La Rioja 26006 Logroño Spain
| | - Elena Lalinde
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ)Universidad de La Rioja 26006 Logroño Spain
| | - Rebeca Lara
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ)Universidad de La Rioja 26006 Logroño Spain
| | - M. Teresa Moreno
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ)Universidad de La Rioja 26006 Logroño Spain
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4
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Zhou X, Powell BJ. Nonradiative Decay and Stability of N-Heterocyclic Carbene Iridium(III) Complexes. Inorg Chem 2018; 57:8881-8889. [DOI: 10.1021/acs.inorgchem.8b00800] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiuwen Zhou
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Benjamin J. Powell
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
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5
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Burn PL, Powell BJ. Effect of n-propyl substituents on the emission properties of blue phosphorescent iridium(iii) complexes. J Chem Phys 2017; 146:174305. [DOI: 10.1063/1.4981797] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Affiliation(s)
- Paul L. Burn
- Centre for Organic Photonics and Electronics, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Benjamin J. Powell
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
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6
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Giménez N, Lara R, Moreno MT, Lalinde E. Facile Approaches to Phosphorescent Bis(cyclometalated) Pentafluorophenyl PtIVComplexes: Photophysics and Computational Studies. Chemistry 2017; 23:5758-5771. [DOI: 10.1002/chem.201605809] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Indexed: 01/06/2023]
Affiliation(s)
- Nora Giménez
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ); Universidad de La Rioja; 26006 Logroño Spain
| | - Rebeca Lara
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ); Universidad de La Rioja; 26006 Logroño Spain
| | - M. Teresa Moreno
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ); Universidad de La Rioja; 26006 Logroño Spain
| | - Elena Lalinde
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ); Universidad de La Rioja; 26006 Logroño Spain
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7
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Zhou X, Burn PL, Powell BJ. Bond Fission and Non-Radiative Decay in Iridium(III) Complexes. Inorg Chem 2016; 55:5266-73. [DOI: 10.1021/acs.inorgchem.6b00219] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiuwen Zhou
- School of Mathematics and Physics and ‡School of Chemistry and Molecular Biosciences, Centre for Organic Photonics & Electronics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Paul L. Burn
- School of Mathematics and Physics and ‡School of Chemistry and Molecular Biosciences, Centre for Organic Photonics & Electronics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Benjamin J. Powell
- School of Mathematics and Physics and ‡School of Chemistry and Molecular Biosciences, Centre for Organic Photonics & Electronics, The University of Queensland, Brisbane, Queensland 4072, Australia
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8
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Escribano A, Steenbock T, Herrmann C, Heck J. Limits of Molecular Dithienylethene Switches Caused by Ferrocenyl Substitution. Chemphyschem 2016; 17:1881-94. [DOI: 10.1002/cphc.201600085] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Alejandra Escribano
- Institut für Anorganische und Angewandte Chemie; Universität Hamburg; Martin-Luther-King-Platz 6 20146 Hamburg Germany
| | - Torben Steenbock
- Institut für Anorganische und Angewandte Chemie; Universität Hamburg; Martin-Luther-King-Platz 6 20146 Hamburg Germany
| | - Carmen Herrmann
- Institut für Anorganische und Angewandte Chemie; Universität Hamburg; Martin-Luther-King-Platz 6 20146 Hamburg Germany
| | - Jürgen Heck
- Institut für Anorganische und Angewandte Chemie; Universität Hamburg; Martin-Luther-King-Platz 6 20146 Hamburg Germany
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9
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Sacarescu L, Cojocaru C, Ardeleanu R, Fortuna M, Sacarescu G, Simionescu M. Dual-emissive polydiphenylsilane nanocomposite: effect of N
,N
′-bis(4-hydroxysalicylidene)-1,2-phenylenediamine-Zn complex. POLYM ADVAN TECHNOL 2015. [DOI: 10.1002/pat.3608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Liviu Sacarescu
- “Petru Poni” Institute of Macromolecular Chemistry; Romanian Academy; Aleea Grigore Ghica Voda 41 A 700487 Iasi Romania
| | - Corneliu Cojocaru
- “Petru Poni” Institute of Macromolecular Chemistry; Romanian Academy; Aleea Grigore Ghica Voda 41 A 700487 Iasi Romania
| | - Rodinel Ardeleanu
- “Petru Poni” Institute of Macromolecular Chemistry; Romanian Academy; Aleea Grigore Ghica Voda 41 A 700487 Iasi Romania
| | - Maria Fortuna
- “Petru Poni” Institute of Macromolecular Chemistry; Romanian Academy; Aleea Grigore Ghica Voda 41 A 700487 Iasi Romania
| | - Gabriela Sacarescu
- “Petru Poni” Institute of Macromolecular Chemistry; Romanian Academy; Aleea Grigore Ghica Voda 41 A 700487 Iasi Romania
| | - Mihaela Simionescu
- “Petru Poni” Institute of Macromolecular Chemistry; Romanian Academy; Aleea Grigore Ghica Voda 41 A 700487 Iasi Romania
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10
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Powell B. Theories of phosphorescence in organo-transition metal complexes – From relativistic effects to simple models and design principles for organic light-emitting diodes. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.02.008] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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11
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Powell BJ. Conservation laws, radiative decay rates, and excited state localization in organometallic complexes with strong spin-orbit coupling. Sci Rep 2015; 5:10815. [PMID: 26123864 PMCID: PMC4485171 DOI: 10.1038/srep10815] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 04/28/2015] [Indexed: 01/26/2023] Open
Abstract
There is longstanding fundamental interest in 6-fold coordinated d(6) (t(2g)(6)) transition metal complexes such as [Ru(bpy)3](2+) and Ir(ppy)3, particularly their phosphorescence. This interest has increased with the growing realisation that many of these complexes have potential uses in applications including photovoltaics, imaging, sensing, and light-emitting diodes. In order to design new complexes with properties tailored for specific applications a detailed understanding of the low-energy excited states, particularly the lowest energy triplet state, T1, is required. Here we describe a model of pseudo-octahedral complexes based on a pseudo-angular momentum representation and show that the predictions of this model are in excellent agreement with experiment - even when the deviations from octahedral symmetry are large. This model gives a natural explanation of zero-field splitting of T1 and of the relative radiative rates of the three sublevels in terms of the conservation of time-reversal parity and total angular momentum modulo two. We show that the broad parameter regime consistent with the experimental data implies significant localization of the excited state.
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Affiliation(s)
- B J Powell
- Centre for Organic Photonics and Electronics, School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland, 4072, Australia
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12
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Vecchi A, Erickson NR, Sabin JR, Floris B, Conte V, Venanzi M, Galloni P, Nemykin VN. Electronic Properties of Mono-Substituted Tetraferrocenyl Porphyrins in Solution and on a Gold Surface: Assessment of the Influencing Factors for Photoelectrochemical Applications. Chemistry 2014; 21:269-79. [DOI: 10.1002/chem.201404457] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Indexed: 01/05/2023]
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13
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Leitl MJ, Küchle FR, Mayer HA, Wesemann L, Yersin H. Brightly blue and green emitting Cu(I) dimers for singlet harvesting in OLEDs. J Phys Chem A 2013; 117:11823-36. [PMID: 23967801 DOI: 10.1021/jp402975d] [Citation(s) in RCA: 160] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
With the chelating aminophosphane ligands Ph2P-(o-C6H4)-N(CH3)2 (PNMe2) and Ph2P-(o-C6H4)-NC4H8 (PNpy), the four halide (Cl, Br, I)-bridged copper coordination compounds [Cu(μ-Cl)(PNMe2)]2 (1), [Cu(μ-Br)(PNMe2)]2 (2), [Cu(μ-I)(PNMe2)]2 (3), and [Cu(μ-I)(PNpy)]2 (4) were synthesized and structurally characterized. Their photophysical properties were studied in detail. The complexes exhibit strong blue (λmax = 464 (3) and 465 nm (4)) and green (λmax = 506 (1) and 490 nm (2)) luminescence as powders with quantum yields of up to 65% at decay times as short as 4.1 μs. An investigation of the emission decay behavior between 1.3 and 300 K gives insight into the nature of the emitting states. At temperatures below T ≈ 60 K, the decay times of the studied compounds are several hundred microseconds long, which indicates that the emission originates from a triplet state (T1 state). DFT calculations show that this state is of (metal+halide)-to-ligand charge transfer (3)(M+X)LCT character. Investigations at 1.3 K allow us to gain insight into the three triplet substates, in particular, to determine the individual substate decay times being as long as a few milliseconds. The zero-field splittings are smaller than 1 or 2 cm(-1). With an analysis of these data, conclusions about the effectiveness of spin-orbit coupling (SOC) can be drawn. Interestingly, the large differences of SOC constants of the halides are not obviously displayed in the triplet state properties. With a temperature increase from T ≈ 60 to 300 K, a significant decrease of the emission decay time by almost 2 orders of magnitude is observed, and at ambient temperature, the decay times amount only to ∼4-7 μs without a significant reduction of the emission quantum yields. This drastic decrease of the (radiative) decay time is a result of the thermal population of a short-lived singlet state (S1 state) that lies energetically only a few hundred wavenumbers (460-630 cm(-1)) higher than the T1 state. Such an emission mechanism corresponds to a thermally activated delayed fluorescence (TADF). At ambient temperature, almost only a delayed fluorescence (∼98%) is observed. Compounds showing this mechanism are highly attractive for applications in OLEDs or LEECs as, in principle, it is possible to harvest all singlet and triplet excitons for the generation of light in the lowest excited singlet state. This effect represents the singlet harvesting mechanism.
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Affiliation(s)
- Markus J Leitl
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg , Universitätsstraße 31, D-93053 Regensburg, Germany
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14
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Dammer SJ, Solntsev PV, Sabin JR, Nemykin VN. Synthesis, Characterization, and Electron-Transfer Processes in Indium Ferrocenyl-Containing Porphyrins and Their Fullerene Adducts. Inorg Chem 2013; 52:9496-510. [DOI: 10.1021/ic401163y] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Samantha J. Dammer
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, 1039 University Drive,
Duluth, Minnesota 55812, United States
| | - Pavlo V. Solntsev
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, 1039 University Drive,
Duluth, Minnesota 55812, United States
| | - Jared R. Sabin
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, 1039 University Drive,
Duluth, Minnesota 55812, United States
| | - Victor N. Nemykin
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, 1039 University Drive,
Duluth, Minnesota 55812, United States
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15
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Smith ARG, Riley MJ, Burn PL, Gentle IR, Lo SC, Powell BJ. Effects of Fluorination on Iridium(III) Complex Phosphorescence: Magnetic Circular Dichroism and Relativistic Time-Dependent Density Functional Theory. Inorg Chem 2012; 51:2821-31. [DOI: 10.1021/ic201899z] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- A. R. G. Smith
- Centre for Organic Photonics & Electronics, ‡School of Chemistry & Molecular Biosciences, and §School of Mathematics & Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - M. J. Riley
- Centre for Organic Photonics & Electronics, ‡School of Chemistry & Molecular Biosciences, and §School of Mathematics & Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - P. L. Burn
- Centre for Organic Photonics & Electronics, ‡School of Chemistry & Molecular Biosciences, and §School of Mathematics & Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - I. R. Gentle
- Centre for Organic Photonics & Electronics, ‡School of Chemistry & Molecular Biosciences, and §School of Mathematics & Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - S.-C. Lo
- Centre for Organic Photonics & Electronics, ‡School of Chemistry & Molecular Biosciences, and §School of Mathematics & Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - B. J. Powell
- Centre for Organic Photonics & Electronics, ‡School of Chemistry & Molecular Biosciences, and §School of Mathematics & Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
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16
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Robson KCD, Bomben PG, Berlinguette CP. Cycloruthenated sensitizers: improving the dye-sensitized solar cell with classical inorganic chemistry principles. Dalton Trans 2012; 41:7814-29. [DOI: 10.1039/c2dt30825h] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Cooper TM, Krein DM, Burke AR, McLean DG, Haley JE, Slagle J, Monahan J, Fratini A. Spectroscopic Structure–Property Relationships of a Series of Polyaromatic Platinum Acetylides. J Phys Chem A 2011; 116:139-49. [DOI: 10.1021/jp203616c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Thomas M Cooper
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright−Patterson Air Force Base, Ohio 45433, United States
| | - Douglas M. Krein
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright−Patterson Air Force Base, Ohio 45433, United States
- General Dynamics Information Technology, Dayton, Ohio 45431, United States
| | - Aaron R. Burke
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright−Patterson Air Force Base, Ohio 45433, United States
- General Dynamics Information Technology, Dayton, Ohio 45431, United States
| | - Daniel G. McLean
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright−Patterson Air Force Base, Ohio 45433, United States
- Science Applications International Corporation, Dayton, Ohio 45434, United States
| | - Joy E. Haley
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright−Patterson Air Force Base, Ohio 45433, United States
| | - Jonathan Slagle
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright−Patterson Air Force Base, Ohio 45433, United States
- Science Applications International Corporation, Dayton, Ohio 45434, United States
| | - Jennifer Monahan
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright−Patterson Air Force Base, Ohio 45433, United States
- SOCHE Student Research Program, Dayton, Ohio 45420, United States
| | - Albert Fratini
- Department of Chemistry, University of Dayton, Dayton, Ohio 45469, United States
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18
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Muise SSR, Severin HA, Koivisto BD, Robson KCD, Schott E, Berlinguette CP. Regioselective C–H Activation of Cyclometalated Bis-Tridentate Ruthenium Complexes. Organometallics 2011. [DOI: 10.1021/om200784j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stacy S. R. Muise
- Department of Chemistry, The
Institute for Sustainable Energy, Environment and Economy, and Centre
for Advanced Solar Materials, University of Calgary, 2500 University Drive N.W., Calgary, Canada T2N 1N4
| | - Holly A. Severin
- Department of Chemistry, The
Institute for Sustainable Energy, Environment and Economy, and Centre
for Advanced Solar Materials, University of Calgary, 2500 University Drive N.W., Calgary, Canada T2N 1N4
| | - Bryan D. Koivisto
- Department of Chemistry, The
Institute for Sustainable Energy, Environment and Economy, and Centre
for Advanced Solar Materials, University of Calgary, 2500 University Drive N.W., Calgary, Canada T2N 1N4
| | - Kiyoshi C. D. Robson
- Department of Chemistry, The
Institute for Sustainable Energy, Environment and Economy, and Centre
for Advanced Solar Materials, University of Calgary, 2500 University Drive N.W., Calgary, Canada T2N 1N4
| | - Eduardo Schott
- Department of Chemistry, The
Institute for Sustainable Energy, Environment and Economy, and Centre
for Advanced Solar Materials, University of Calgary, 2500 University Drive N.W., Calgary, Canada T2N 1N4
- Departamento de Ciencias Químicas, Universidad Andres Bello, República 275, Santiago,
Chile
| | - Curtis P. Berlinguette
- Department of Chemistry, The
Institute for Sustainable Energy, Environment and Economy, and Centre
for Advanced Solar Materials, University of Calgary, 2500 University Drive N.W., Calgary, Canada T2N 1N4
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19
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Smith ARG, Burn PL, Powell BJ. Spin-Orbit Coupling in Phosphorescent Iridium(III) Complexes. Chemphyschem 2011; 12:2429-38. [DOI: 10.1002/cphc.201100397] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Indexed: 11/08/2022]
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20
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Robson KCD, Sporinova B, Koivisto BD, Schott E, Brown DG, Berlinguette CP. Systematic Modulation of a Bichromic Cyclometalated Ruthenium(II) Scaffold Bearing a Redox-Active Triphenylamine Constituent. Inorg Chem 2011; 50:6019-28. [DOI: 10.1021/ic1025679] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kiyoshi C. D. Robson
- Department of Chemistry and Institute for Sustainable Energy, Environment and Economy, University of Calgary, 2500 University Drive NW, Calgary, Canada T2N 1N4
| | - Barbora Sporinova
- Department of Chemistry and Institute for Sustainable Energy, Environment and Economy, University of Calgary, 2500 University Drive NW, Calgary, Canada T2N 1N4
| | - Bryan D. Koivisto
- Department of Chemistry and Institute for Sustainable Energy, Environment and Economy, University of Calgary, 2500 University Drive NW, Calgary, Canada T2N 1N4
| | - Eduardo Schott
- Departamento de Ciencias Químicas, Universidad Andres Bello, República 275, Santiago, Chile
| | - Douglas G. Brown
- Department of Chemistry and Institute for Sustainable Energy, Environment and Economy, University of Calgary, 2500 University Drive NW, Calgary, Canada T2N 1N4
| | - Curtis P. Berlinguette
- Department of Chemistry and Institute for Sustainable Energy, Environment and Economy, University of Calgary, 2500 University Drive NW, Calgary, Canada T2N 1N4
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21
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Robson KCD, Koivisto BD, Yella A, Sporinova B, Nazeeruddin MK, Baumgartner T, Grätzel M, Berlinguette CP. Design and Development of Functionalized Cyclometalated Ruthenium Chromophores for Light-Harvesting Applications. Inorg Chem 2011; 50:5494-508. [DOI: 10.1021/ic200011m] [Citation(s) in RCA: 171] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Kiyoshi C. D. Robson
- Department of Chemistry and The Institute for Sustainable Energy, Environment and Economy, University of Calgary, 2500 University Drive N.W., Calgary T2N-1N4, Canada
| | - Bryan D. Koivisto
- Department of Chemistry and The Institute for Sustainable Energy, Environment and Economy, University of Calgary, 2500 University Drive N.W., Calgary T2N-1N4, Canada
| | - Aswani Yella
- Laboratory of Photonics and Interfaces (LPI), Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology (EPFL), Station 6, Lausanne CH CH-1015, Switzerland
| | - Barbora Sporinova
- Department of Chemistry and The Institute for Sustainable Energy, Environment and Economy, University of Calgary, 2500 University Drive N.W., Calgary T2N-1N4, Canada
| | - Mohammad K. Nazeeruddin
- Laboratory of Photonics and Interfaces (LPI), Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology (EPFL), Station 6, Lausanne CH CH-1015, Switzerland
| | - Thomas Baumgartner
- Department of Chemistry and The Institute for Sustainable Energy, Environment and Economy, University of Calgary, 2500 University Drive N.W., Calgary T2N-1N4, Canada
| | - Michael Grätzel
- Laboratory of Photonics and Interfaces (LPI), Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology (EPFL), Station 6, Lausanne CH CH-1015, Switzerland
| | - Curtis P. Berlinguette
- Department of Chemistry and The Institute for Sustainable Energy, Environment and Economy, University of Calgary, 2500 University Drive N.W., Calgary T2N-1N4, Canada
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Jacko AC, Powell BJ, McKenzie RH. Sensitivity of the photophysical properties of organometallic complexes to small chemical changes. J Chem Phys 2011; 133:124314. [PMID: 20886939 DOI: 10.1063/1.3480981] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
We investigate an effective model Hamiltonian for organometallic complexes that are widely used in optoelectronic devices. The two most important parameters in the model are J, the effective exchange interaction between the π and π* orbitals of the ligands, and ε*, the renormalized energy gap between the highest occupied orbitals on the metal and on the ligand. We find that the degree of metal-to-ligand charge transfer character of the lowest triplet state is strongly dependent on the ratio ε*/J. ε* is purely a property of the complex and can be changed significantly by even small variations in the complex's chemistry, such as replacing substituents on the ligands. We find that small changes in ε*/J can cause large changes in the properties of the complex, including the lifetime of the triplet state and the probability of injected charges (electrons and holes) forming triplet excitations. These results give some insight into the observed large changes in the photophysical properties of organometallic complexes caused by small changes in the ligands.
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Affiliation(s)
- A C Jacko
- Centre for Organic Photonics and Electronics, School of Mathematics and Physics, The University of Queensland, Brisbane QLD 4072, Australia.
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