1
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Riesebeck T, Tronnier A, Strassner T. Cyclometalated C^C* Platinum(IV) NHC Complexes. Inorg Chem 2024. [PMID: 39250523 DOI: 10.1021/acs.inorgchem.4c01608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/11/2024]
Abstract
We present a previously unknown series of cyclometalated platinum(IV) NHC complexes, obtained by oxidative addition of iodine, iodomethane, and different benzyl bromides to platinum(II) complexes with cyclometalated C^C* dibenzofuran, dibenzothiophene, and phenylimidazole ligands together with an acetylacetonate ligand. All compounds were characterized by standard techniques (1H, 13C, and 195Pt NMR and elemental analysis), and for three complexes, solid-state structures could be obtained. DFT calculations (B3LYP(d3)/def2-TZVPP including dispersion interactions in dichloromethane and acetone) were performed to investigate the mechanism of the oxidation and explain the exclusive formation of the observed trans products.
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Affiliation(s)
- Tim Riesebeck
- Fakultät Chemie und Lebensmittelchemie, Professur für Physikalische Organische Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
| | - Alexander Tronnier
- Fakultät Chemie und Lebensmittelchemie, Professur für Physikalische Organische Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
| | - Thomas Strassner
- Fakultät Chemie und Lebensmittelchemie, Professur für Physikalische Organische Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
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2
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Lam TL, Li H, Tan K, Chen Z, Tang YK, Yang J, Cheng G, Dai L, Che CM. Sterically Hindered Tetradentate [Pt(O^N^C^N)] Emitters with Radiative Decay Rates up to 5.3 × 10 5 s -1 for Phosphorescent Organic Light-Emitting Diodes with LT 95 Lifetime over 9200 h at 1000 cd m -2. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307393. [PMID: 37897146 DOI: 10.1002/smll.202307393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/07/2023] [Indexed: 10/29/2023]
Abstract
Described here are sterically hindered tetradentate [Pt(O^N^C^N)] emitters (Pt-1, Pt-2, and Pt-3) developed for stable and high-performance green phosphorescent organic light-emitting diodes (OLEDs). These Pt(II) emitters exhibit strong saturated green phosphorescence (λmax = 517-531 nm) in toluene and mCP thin films with emission quantum yields as high as 0.97, radiative rate constants (kr) as high as 4.4-5.3 × 105 s-1 and reduced excimer emission, and with a preferential horizontally oriented transition dipole ratio of up to 84%. Theoretical calculations show that p-(hetero)arene substituents at the periphery of the ligand scaffolds in Pt-1, Pt-2, and Pt-3 can i) enhance the spin-orbit coupling (SOC) between the lower singlet excited states and the T1 state, and S0→Sn (n = 1 or 2) transition dipole moment, and ii) introducing additional SOC activity and the bright 1ILCT[π(carbazole)→π*(N^C^N)] excited state (Pt-2 and Pt-3), which are the main contributors to the increased kr values. Utilizing these tetradentate Pt(II) emitters, green phosphorescent OLEDs are fabricated with narrow-band electroluminescence (FWHM down to 36 nm), high external quantum efficiency, current efficiency up to 27.6% and 98.7 cd A-1, and an unprecedented device lifetime (LT95) of up to 9270 h at 1000 cd m-2 under laboratory conditions.
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Affiliation(s)
- Tsz-Lung Lam
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
- Hong Kong Quantum AI Lab Limited, Units 909-915, Building 17 W, 17 Science Park West Avenue, Hong Kong Science Park, Pak Shek Kok, Hong Kong
| | - Huiyang Li
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
- Guangdong Aglaia Optoelectronic Materials Co., Ltd, Foshan, 528300, China
| | - Kaixin Tan
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Ziyong Chen
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Yu-Kan Tang
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Jun Yang
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
- Hong Kong Quantum AI Lab Limited, Units 909-915, Building 17 W, 17 Science Park West Avenue, Hong Kong Science Park, Pak Shek Kok, Hong Kong
| | - Gang Cheng
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
- Hong Kong Quantum AI Lab Limited, Units 909-915, Building 17 W, 17 Science Park West Avenue, Hong Kong Science Park, Pak Shek Kok, Hong Kong
- HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong, 518057, P. R. China
| | - Lei Dai
- Guangdong Aglaia Optoelectronic Materials Co., Ltd, Foshan, 528300, China
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
- Hong Kong Quantum AI Lab Limited, Units 909-915, Building 17 W, 17 Science Park West Avenue, Hong Kong Science Park, Pak Shek Kok, Hong Kong
- HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong, 518057, P. R. China
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3
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Ogawa T, Wenger OS. Nickel(II) Analogues of Phosphorescent Platinum(II) Complexes with Picosecond Excited-State Decay. Angew Chem Int Ed Engl 2023; 62:e202312851. [PMID: 37732725 DOI: 10.1002/anie.202312851] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 09/22/2023]
Abstract
Square-planar NiII complexes are interesting as cheaper and more sustainable alternatives to PtII luminophores widely used in lighting and photocatalysis. We investigated the excited-state behavior of two NiII complexes, which are isostructural with two luminescent PtII complexes. The initially excited singlet metal-to-ligand charge transfer (1 MLCT) excited states in the NiII complexes decay to metal-centered (3 MC) excited states within less than 1 picosecond, followed by non-radiative relaxation of the 3 MC states to the electronic ground state within 9-21 ps. This contrasts with the population of an emissive triplet ligand-centered (3 LC) excited state upon excitation of the PtII analogues. Structural distortions of the NiII complexes are responsible for this discrepant behavior and lead to dark 3 MC states far lower in energy than the luminescent 3 LC states of PtII compounds. Our findings suggest that if these structural distortions could be restricted by more rigid coordination environments and stronger ligand fields, the excited-state relaxation in four-coordinate NiII complexes could be decelerated such that luminescent 3 LC or 3 MLCT excited states become accessible. These insights are relevant to make NiII fit for photophysical and photochemical applications that relied on PtII until now.
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Affiliation(s)
- Tomohiro Ogawa
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
- Graduate School of Science and Engineering, University of Toyama, Toyama, 930-8555, Japan
| | - Oliver S Wenger
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
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4
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Gómez de Segura D, Giménez N, Rincón-Montón D, Moreno MT, Pichel JG, López IP, Lalinde E. A new family of luminescent [Pt(pbt) 2(C 6F 5)L] n+ ( n = 1, 0) complexes: synthesis, optical and cytotoxic studies. Dalton Trans 2023; 52:12390-12403. [PMID: 37594064 DOI: 10.1039/d3dt01759a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Given the widely recognized bioactivity of 2-arylbenzothiazoles against tumor cells, we have designed a new family of luminescent heteroleptic pentafluorophenyl-bis(2-phenylbenzothiazolyl) PtIV derivatives, fac-[Pt(pbt)2(C6F5)L]n+ (n = 1, 0) [L = 4-Mepy 1, 4-pyridylbenzothiazole (pybt) 2, 4,4'-bipyridine (4,4'-bpy) 3, 1,2-bis-(4-pyridyl)ethylene (bpe) 4 (E/Z ratio: 90/10), 1,4-bis-(pyridyl)butadiyne (bpyb) 5, trifluoroacetate (-OCOCF3) 6] and a dinuclear complex [{Pt(pbt)2(C6F5)}2(μ-bpyb)](PF6)27, in which the trans ligand to the metalated C-(pbt) was varied to modify the optical properties and lipophilicity. Their photophysical properties were systematically studied through experimental and theoretical investigations, which were strongly dependent on the identity of the N-bonded ligand. Thus, complexes 1, 3 and 6 display, in different media, emission from the triplet excited states of primarily intraligand 3ILCT nature localized on the pbt ligand, while the emissions of 2, 5 and 7 were ascribed to a mixture of close 3IL'(N donor)/3ILCT(pbt) excited states, as supported by lifetime measurements and theoretical calculations. Irradiation of the initial E/Z mixture of 4 (15 min) led to a steady state composed of roughly 1 : 1.15 (E : Z) and this complex was not emissive at room temperature due to an enhanced intramolecular E to Z isomerization process of the 1,2-bis-(4-pyridyl)ethylene ligand. Complexes 1-3 and 6 showed excellent quantum yields for the generation of singlet oxygen in aerated MeCN solution with the values of ϕ(1O2) ranging from 0.66 to 0.86 using phenalenone as a reference. Cationic complexes 1-3 exhibited remarkable efficacy in the nanomolar range against A549 (lung carcinoma) and HeLa (cervix carcinoma) cell lines with notable selectivity relative to the non-tumorigenic BEAS-2B (bronchial epithelium) cells. In the A549 cell line, the neutral complex 6 showed low cytotoxicity (IC50: 29.40 μM) and high photocytotoxicity (IC50: 5.75) when cells were irradiated with blue light for 15 min. These complexes do not show evidence of DNA interaction.
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Affiliation(s)
- David Gómez de Segura
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ), Universidad de La Rioja, 26006, Logroño, Spain.
| | - Nora Giménez
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ), Universidad de La Rioja, 26006, Logroño, Spain.
| | - David Rincón-Montón
- 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.
| | - José G Pichel
- Lung Cancer and Respiratory Diseases Unit (CIBIR), Fundación Rioja Salud, 26006, Logroño, Spain.
- Spanish Biomedical Research Networking Centre in Respiratory Diseases (CIBERES), ISCIII, E-28029, Madrid, Spain
| | - Icíar P López
- Lung Cancer and Respiratory Diseases Unit (CIBIR), Fundación Rioja Salud, 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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5
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Sikora P, Naumann R, Förster C, Heinze K. Excited state energy landscape of phosphorescent group 14 complexes. Chem Sci 2023; 14:2489-2500. [PMID: 36908954 PMCID: PMC9993841 DOI: 10.1039/d2sc06984a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 01/27/2023] [Indexed: 01/31/2023] Open
Abstract
Great progress has been achieved on phosphorescent or photoactive complexes of the Earth-abundant transition metals, while examples for phosphorescent heavy main group element complexes are rare, in particular for group 14 complexes in the oxidation state +II. The known compounds often show only weak phosphorescence with fast non-radiative deactivation. The underlying photophysical processes and the nature of the phosphorescent electronic states have remained essentially unexplored. The present combined photophysical and theoretical study on tin(ii) and lead(ii) complexes E(bpep) with the dianionic tridentate ligand bpep2- (E = Sn, Pb; H2bpep = 2-[1,1-bis(1H-pyrrol-2-yl)ethyl]pyridine) provides unprecedented insight in the excited state energy landscape of tetrel(ii) complexes. The tin complex shows green intraligand charge transfer (ILCT) phosphorescence both in solution and in the solid state. In spite of its larger heavy-atom effect, the lead complex only shows very weak red phosphorescence from a strongly distorted ligand-to-metal charge transfer (LMCT) state at low temperatures in the solid state. Detailed (TD-)DFT calculations explain these observations and delineate the major path of non-radiative deactivation via distorted LMCT states. These novel insights provide rational design principles for tetrel(ii) complexes with long-lived phosphorescence.
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Affiliation(s)
- Philipp Sikora
- Johannes Gutenberg University Mainz Duesbergweg 10-14 55128 Mainz Germany
| | - Robert Naumann
- Johannes Gutenberg University Mainz Duesbergweg 10-14 55128 Mainz Germany
| | - Christoph Förster
- Johannes Gutenberg University Mainz Duesbergweg 10-14 55128 Mainz Germany
| | - Katja Heinze
- Johannes Gutenberg University Mainz Duesbergweg 10-14 55128 Mainz Germany
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6
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De Soricellis G, Fagnani F, Colombo A, Dragonetti C, Roberto D. Exploring the potential of N^C^N cyclometalated Pt(II) complexes bearing 1,3-di(2-pyridyl)benzene derivatives for imaging and photodynamic therapy. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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7
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Emami M, Shahroosvand H, Bikas R, Lis T, Daneluik C, Pilkington M. Synthesis, Study, and Application of Pd(II) Hydrazone Complexes as the Emissive Components of Single-Layer Light-Emitting Electrochemical Cells. Inorg Chem 2021; 60:982-994. [PMID: 33404233 DOI: 10.1021/acs.inorgchem.0c03102] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
For the first time, square planar Pd(II) complexes of hydrazone ligands have been investigated as the emissive components of light-emitting electrochemical cells (LECs). The neutral transition metal complex, [Pd(L1)2]·2CH3OH (1), (HL1 = (E)-N'-(phenyl(pyridin-2-yl)methylene)isonicotinhydrazide), was prepared and structurally characterized. Complex 1 displays quasireversible redox properties and is emissive at room temperature in solution with a λmax of 590 nm. As a result, it was subsequently employed as the emissive material of a single-layer LEC with configuration FTO/1/Ga/In, where studies reveal that it has a yellow color with CIE(x, y) = (0.33, 0.55), a luminance of 134 cd cm-2, and a turn-on voltage of 3.5 V. Protonation of the pendant pyridine nitrogen atoms of L1 afforded a second ionic complex [Pd(L1H)2](ClO4)2 (2) which is also emissive at room temperature with a λmax of 611 nm, resulting in an orange LEC with CIE(x, y) = (0.43, 0.53). The presence of mobile anions and cations in the second inorganic transition metal complex resulted in more efficient charge injection and transport which significantly improved the luminance and turn-on voltage of the device to 188.6 cd cm-2 and 3 V, respectively. This study establishes Pd(II) hydrazone complexes as a new class of materials whose emissive properties can be chemically tuned and provides proof-of-concept for their use in LECs, opening up exciting new avenues for potential applications in the field of solid state lighting.
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Affiliation(s)
- Marzieh Emami
- Group for Molecular Engineering of Advanced Functional Materials (GMA), Chemistry Department, University of Zanjan, 45371-38791 Zanjan, Iran
| | - Hashem Shahroosvand
- Group for Molecular Engineering of Advanced Functional Materials (GMA), Chemistry Department, University of Zanjan, 45371-38791 Zanjan, Iran
| | - Rahman Bikas
- Department of Chemistry, Faculty of Science, Imam Khomeini International University, 34148-96818 Qazvin, Iran
| | - Tadeusz Lis
- Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, Wroclaw 50-383, Poland
| | - Cody Daneluik
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S3A1, Canada
| | - Melanie Pilkington
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S3A1, Canada
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8
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Expósito JE, Aullón G, Bardají M, Miguel JA, Espinet P. Fluorescent perylenylpyridine complexes: an experimental and theoretical study. Dalton Trans 2020; 49:13326-13338. [PMID: 32944721 DOI: 10.1039/d0dt02494e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The perylene derivative 2-(3-perylenyl)-4-methylpyridine (HPerPy) was prepared and used to synthesize [Ag(HPerPy)(PPh3)(OClO3)], with the perylene ligand bonded to the metal centre only by the pyridine nitrogen. The treatment of HPerPy with [Pd(OAc)2] in methanol or acetic acid led to acetate bridged dimers (μ-OOCCH3)2[Pd(PerPy)]2, six-membered or five-membered cycled at the perylenyl fragment. Substitution reactions afforded mononuclear compounds [Pd(PerPy)(acac)] (six-member or five-member cycled) and [Pd(PerPy)(S2COMe)] (six-member or five-member cycled). The reaction of HPerPy with a platinum(ii) fragment led to a five-membered cyclometallated Pt(ii) complex [Pt(PerPy)(acac)]. The oxidative addition with MeI gave the corresponding cyclometallated Pt(iv) compound [Pt(PerPy)(acac)MeI]. X-ray single crystal studies of compounds [Ag(HPerPy)(PPh3)(OClO3)], (μ-OOCCH3)2[Pd(PerPy)]2-five-membered, [Pd(PerPy)(acac)]-six-membered, [Pd(PerPy)(S2COMe)]-five-membered, [Pt(PerPy)(acac)]-five-membered, and [Pt(PerPy)(acac)MeI]-five-membered confirmed the proposed structures. The UV-Vis spectra show one intense absorption with vibronic coupling in the visible region with maxima in the range of 448-519 nm. DFT calculations were carried out for the absorption spectra of the HPerPy molecule and representative complexes [M(PerPy)(acac)] (M: Pd, Pt; five and six-membered isomers) and [Pt(PerPy)(acac)MeI], showing that the lowest energy most intense transition in the complexes corresponds to the HOMO → LUMO transition in the perylene moiety, although affected by the metallacycle size and the metal nature. All the compounds are fluorescent in solution, due to the perylene fragment. The emission spectra display maxima in the range of 468-549 nm, with quantum yields from 1.1 to 82%. The attenuation of the intensity of fluorescence by the presence of heavy atoms and the formation of metallacycles has been experimentally determined and sequenced.
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Affiliation(s)
- J Emilio Expósito
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain.
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9
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Yam VWW, Chan AKW, Hong EYH. Charge-transfer processes in metal complexes enable luminescence and memory functions. Nat Rev Chem 2020. [DOI: 10.1038/s41570-020-0199-7] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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10
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Shillito GE, Preston D, Traber P, Steinmetzer J, McAdam CJ, Crowley JD, Wagner P, Kupfer S, Gordon KC. Excited-State Switching Frustrates the Tuning of Properties in Triphenylamine-Donor-Ligand Rhenium(I) and Platinum(II) Complexes. Inorg Chem 2020; 59:6736-6746. [PMID: 32338504 DOI: 10.1021/acs.inorgchem.9b03691] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The photophysical properties of a series of rhenium(I) tricarbonyl and platinum(II) bis(acetylide) complexes containing a triphenylamine (TPA)-substituted 1,10-phenanthroline ligand have been examined. The complexes possess both metal-to-ligand charge-transfer (MLCT) and intraligand charge-transfer (ILCT) transitions that absorb in the visible region. The relative energies and ordering of the absorbing CT states have been successfully controlled by changing the metal center and modulating the donating ability of the TPA group through the addition of electron-donating methoxy and electron-withdrawing cyano groups. The ground-state properties behave in a predictable manner as a function of the TPA substituent and are characterized with a suite of techniques including electronic absorption spectroscopy, resonance Raman spectroscopy, electrochemistry, and time-dependent density functional theory calculations. However, systematic control over the ground-state properties of the complexes does not extend to their excited-state behavior. Unexpectedly, despite variation of both the MLCT and ILCT state energies, all of the luminescent complexes displayed near-isoenergetic emission at 298 K, yet the emissive lifetimes of the complexes vary from 290 ns to 3.9 μs. Excited-state techniques including transient absorption and transient resonance Raman, combined with a suite of quantum-chemical calculations, including scalar relativistic effects to elucidate competitive excited-state relaxation pathways, have been utilized to aid in assignment of the long-lived state in the complexes, which was shown to possess differing 3MLCT and 3ILCT contributions across the series.
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Affiliation(s)
- Georgina E Shillito
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, New Zealand
| | - Dan Preston
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, New Zealand
| | - Philipp Traber
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany
| | - Johannes Steinmetzer
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany
| | - C John McAdam
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, New Zealand
| | - James D Crowley
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, New Zealand
| | - Pawel Wagner
- University of Wollongong, Wollongong New South Wales 2522, Australia
| | - Stephan Kupfer
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, Jena 07743, Germany
| | - Keith C Gordon
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, New Zealand
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12
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Phosphorescence properties of anionic cyclometalated platinum(II) complexes with fluorine-substituted tridentate diphenylpyridine in the solid state. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2019.137024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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13
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Wei F, Lai SL, Zhao S, Ng M, Chan MY, Yam VWW, Wong KMC. Ligand Mediated Luminescence Enhancement in Cyclometalated Rhodium(III) Complexes and Their Applications in Efficient Organic Light-Emitting Devices. J Am Chem Soc 2019; 141:12863-12871. [PMID: 31310721 DOI: 10.1021/jacs.9b06308] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A series of luminescent cyclometalated rhodium(III) complexes have been designed and prepared. The improved luminescence property is realized by the judicious choice of a strong σ-donor cyclometalating ligand with a lower-lying intraligand (IL) state that would raise the d-d excited state and introduction of a lower-lying emissive IL excited state. These complexes exhibit high thermal stability and considerable luminescence quantum yields as high as up to 0.65 in thin film, offering themselves as promising light-emitting materials in OLEDs. Respectable external quantum efficiencies of up to 12.2% and operational half-lifetimes of over 3000 h at 100 cd m-2 have been achieved. This work demonstrates a breakthrough as the first example of an efficient rhodium(III) emitter for OLED application and opens up a new avenue for diversifying the development of OLED materials with rhodium metal being utilized as phosphors.
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Affiliation(s)
- Fangfang Wei
- Department of Chemistry , Southern University of Science and Technology , 1088 Xueyuan Blvd. , Shenzhen 518055 , PR China
| | - Shiu-Lun Lai
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee, Hong Kong) and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , PR China
| | - Shunan Zhao
- Department of Chemistry , Southern University of Science and Technology , 1088 Xueyuan Blvd. , Shenzhen 518055 , PR China
| | - Maggie Ng
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee, Hong Kong) and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , PR China
| | - Mei-Yee Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee, Hong Kong) and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , PR China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee, Hong Kong) and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , PR China
| | - Keith Man-Chung Wong
- Department of Chemistry , Southern University of Science and Technology , 1088 Xueyuan Blvd. , Shenzhen 518055 , PR China
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14
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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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15
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Kamecka A, Suwińska K, Kapturkiewicz A. Heteroleptic [Os(Cl)(CO)(P^P)(pbi)] complexes bearing bidentate phosphine and 2-(2-pyridyl)benzimidazolate ligands: impact of isomerism on their luminescence properties. Phys Chem Chem Phys 2019; 21:17746-17759. [DOI: 10.1039/c9cp03416a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two isomeric series of osmium(ii) complexes exhibit significant differences in their luminescence properties.
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Affiliation(s)
- Anna Kamecka
- Institute of Chemistry
- Faculty of Sciences
- University of Natural Sciences and Humanities in Siedlce
- 08-110 Siedlce
- Poland
| | - Kinga Suwińska
- Faculty of Mathematics and Natural Sciences
- Cardinal Stefan Wyszynski University in Warsaw
- 01-938 Warszawa
- Poland
| | - Andrzej Kapturkiewicz
- Institute of Chemistry
- Faculty of Sciences
- University of Natural Sciences and Humanities in Siedlce
- 08-110 Siedlce
- Poland
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16
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Vivancos Á, Poveda D, Muñoz A, Moreno J, Bautista D, González-Herrero P. Selective synthesis, reactivity and luminescence of unsymmetrical bis-cyclometalated Pt(iv) complexes. Dalton Trans 2019; 48:14367-14382. [DOI: 10.1039/c9dt02431j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The degree of MLCT admixture into the 3LC emitting state of unsymmetrical Pt(iv) complexes bearing two different cyclometalated ligands depends on the coordination position of the chromophoric ligand.
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Affiliation(s)
- Ángela Vivancos
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad de Murcia
- 30071 Murcia
- Spain
| | - Dionisio Poveda
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad de Murcia
- 30071 Murcia
- Spain
| | - Alonso Muñoz
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad de Murcia
- 30071 Murcia
- Spain
| | - Julia Moreno
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad de Murcia
- 30071 Murcia
- Spain
| | | | - Pablo González-Herrero
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad de Murcia
- 30071 Murcia
- Spain
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17
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Ogawa T, Sameera WMC, Saito D, Yoshida M, Kobayashi A, Kato M. Phosphorescence Properties of Discrete Platinum(II) Complex Anions Bearing N-Heterocyclic Carbenes in the Solid State. Inorg Chem 2018; 57:14086-14096. [PMID: 30354093 DOI: 10.1021/acs.inorgchem.8b01654] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Tomohiro Ogawa
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - W. M. C. Sameera
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Daisuke Saito
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Masaki Yoshida
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Atsushi Kobayashi
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Masako Kato
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
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18
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Majumder M, Paul S, Misra A. Ligand-induced symmetry breaking and concomitant blueshift in the emission wavelength of an octahedral chromium complex. J Mol Model 2018; 24:230. [DOI: 10.1007/s00894-018-3768-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 07/27/2018] [Indexed: 10/28/2022]
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19
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Berenguer JR, Lalinde E, Moreno MT. Luminescent cyclometalated-pentafluorophenyl Pt II , Pt IV and heteropolynuclear complexes. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.04.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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20
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Suter D, van Summeren LTCG, Blacque O, Venkatesan K. Highly Stable and Strongly Emitting N-Heterocyclic Carbene Platinum(II) Biaryl Complexes. Inorg Chem 2018; 57:8160-8168. [DOI: 10.1021/acs.inorgchem.8b00564] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dominik Suter
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland
| | - Luuk T. C. G. van Summeren
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland
- Department of Molecular Materials, Radboud University, Nijmegen, 6525 AJ, Netherlands
| | - Olivier Blacque
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland
| | - Koushik Venkatesan
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland
- Department of Molecular Sciences, Macquarie University,
North Ryde, NSW 2109, Australia
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21
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Yarnell JE, De La Torre P, Castellano FN. Efficient Phosphorescence from Naphthalenebenzimidizole‐Coordinated Iridium(III) Chromophores. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700669] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- James E. Yarnell
- Department of Chemistry North Carolina State University 27695‐8204 Raleigh North Carolina USA
| | - Patricia De La Torre
- Department of Chemistry North Carolina State University 27695‐8204 Raleigh North Carolina USA
| | - Felix N. Castellano
- Department of Chemistry North Carolina State University 27695‐8204 Raleigh North Carolina USA
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22
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Ionescu A, Godbert N, Ricciardi L, La Deda M, Aiello I, Ghedini M, Rimoldi I, Cesarotti E, Facchetti G, Mazzeo G, Longhi G, Abbate S, Fusè M. Luminescent water-soluble cycloplatinated complexes: Structural, photophysical, electrochemical and chiroptical properties. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.02.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Katlenok EA, Zolotarev AA, Smirnov AY, Ivanov SN, Baichurin RI, Makarenko SV, Balashev KP. Structures and optical and electrochemical properties of the Pt(II) and Pd(II) complexes with cyclometallated 2-phenylbenzothiazole and 1,4,7-trithiocyclononane. RUSS J COORD CHEM+ 2017. [DOI: 10.1134/s1070328417040029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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24
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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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25
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Moussa J, Loch A, Chamoreau LM, Degli Esposti A, Bandini E, Barbieri A, Amouri H. Luminescent Cyclometalated Platinum Complexes with π-Bonded Catecholate Organometallic Ligands. Inorg Chem 2017; 56:2050-2059. [PMID: 28182410 DOI: 10.1021/acs.inorgchem.6b02731] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of cyclometalated platinum(II) complexes of the type [(ppy)Pt(LM)]n+ (n = 0, 1) with π-bonded catecholates acting as organometallic ligands (LM) have been prepared and characterized by analytical techniques. In addition, the structures of two complexes of the series were determined by single-crystal X-ray diffraction. The packing shows the formation of a 1D supramolecular assembly generated by dPt-πCp* interactions among individual units. All complexes are luminescent in the solid state and in solution media. The results of photophysics have been rationalized by means of density functional theory (DFT) and time-dependent DFT investigations.
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Affiliation(s)
- Jamal Moussa
- Sorbonne Universités, UPMC Universités Paris 06, and CNRS, IPCM, UMR 8232 , 4 place Jussieu, 75252 Paris Cedex 05, France
| | - Aruny Loch
- Sorbonne Universités, UPMC Universités Paris 06, and CNRS, IPCM, UMR 8232 , 4 place Jussieu, 75252 Paris Cedex 05, France
| | - Lise-Marie Chamoreau
- Sorbonne Universités, UPMC Universités Paris 06, and CNRS, IPCM, UMR 8232 , 4 place Jussieu, 75252 Paris Cedex 05, France
| | - Alessandra Degli Esposti
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR) , Via Gobetti 101, 40129 Bologna, Italy
| | - Elisa Bandini
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR) , Via Gobetti 101, 40129 Bologna, Italy
| | - Andrea Barbieri
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR) , Via Gobetti 101, 40129 Bologna, Italy
| | - Hani Amouri
- Sorbonne Universités, UPMC Universités Paris 06, and CNRS, IPCM, UMR 8232 , 4 place Jussieu, 75252 Paris Cedex 05, France
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Seth SK, Mandal S, Srikanth K, Purkayastha P, Gupta P. Electronic Description of the Photophysics of Homo- and Heterodinuclear Cyclometallated Iridium and Rhodium Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601258] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sourav Kanti Seth
- Department of Chemical Science; Indian Institute of Science Education and Research (IISER) Kolkata; 741246, WB Mohanpur India
| | - Soumik Mandal
- Department of Chemical Science; Indian Institute of Science Education and Research (IISER) Kolkata; 741246, WB Mohanpur India
| | - K. Srikanth
- Department of Chemical Science; Indian Institute of Science Education and Research (IISER) Kolkata; 741246, WB Mohanpur India
| | - Pradipta Purkayastha
- Department of Chemical Science; Indian Institute of Science Education and Research (IISER) Kolkata; 741246, WB Mohanpur India
| | - Parna Gupta
- Department of Chemical Science; Indian Institute of Science Education and Research (IISER) Kolkata; 741246, WB Mohanpur India
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27
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Ricciardi L, La Deda M, Ionescu A, Godbert N, Aiello I, Ghedini M. Anionic cyclometallated Pt(ii) square-planar complexes: new sets of highly luminescent compounds. Dalton Trans 2017; 46:12625-12635. [DOI: 10.1039/c7dt02267k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Novel anionic Pt(ii) complexes were synthesized, displaying an outstanding enhancement of the emission efficiency in the solid state.
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Affiliation(s)
- Loredana Ricciardi
- CNR NANOTEC-Istituto di Nanotecnologia U.O.S. Cosenza
- 87036 Arcavacata di Rende
- Italy
| | - Massimo La Deda
- CNR NANOTEC-Istituto di Nanotecnologia U.O.S. Cosenza
- 87036 Arcavacata di Rende
- Italy
- MAT_INLAB (Laboratorio di Materiali Molecolari Inorganici)
- Centro di Eccellenza CEMIF.CAL
| | - Andreea Ionescu
- MAT_INLAB (Laboratorio di Materiali Molecolari Inorganici)
- Centro di Eccellenza CEMIF.CAL
- LASCAMM CR-INSTM
- Unità INSTM della Calabria
- Dipartimento di Chimica e Tecnologie Chimiche
| | - Nicolas Godbert
- CNR NANOTEC-Istituto di Nanotecnologia U.O.S. Cosenza
- 87036 Arcavacata di Rende
- Italy
- MAT_INLAB (Laboratorio di Materiali Molecolari Inorganici)
- Centro di Eccellenza CEMIF.CAL
| | - Iolinda Aiello
- CNR NANOTEC-Istituto di Nanotecnologia U.O.S. Cosenza
- 87036 Arcavacata di Rende
- Italy
- MAT_INLAB (Laboratorio di Materiali Molecolari Inorganici)
- Centro di Eccellenza CEMIF.CAL
| | - Mauro Ghedini
- CNR NANOTEC-Istituto di Nanotecnologia U.O.S. Cosenza
- 87036 Arcavacata di Rende
- Italy
- MAT_INLAB (Laboratorio di Materiali Molecolari Inorganici)
- Centro di Eccellenza CEMIF.CAL
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28
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Tang MC, Chan AKW, Chan MY, Yam VWW. Platinum and Gold Complexes for OLEDs. Top Curr Chem (Cham) 2016; 374:46. [PMID: 27573398 DOI: 10.1007/s41061-016-0046-y] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 06/14/2016] [Indexed: 12/20/2022]
Abstract
Encouraging efforts on the design of high-performance organic materials and smart architecture during the past two decades have made organic light-emitting device (OLED) technology an important competitor for the existing liquid crystal displays. Particularly, the development of phosphorescent materials based on transition metals plays a crucial role for this success. Apart from the extensively studied iridium(III) complexes with d(6) electronic configuration and octahedral geometry, the coordination-unsaturated nature of d(8) transition metal complexes with square-planar structures has been found to provide intriguing spectroscopic and luminescence properties. This article briefly summarizes the development of d(8) platinum(II) and gold(III) complexes and their application studies in the fabrication of phosphorescent OLEDs. An in-depth understanding of the nature of the excited states has offered a great opportunity to fine-tune the emission colors covering the entire visible spectrum as well as to improve their photophysical properties. With good device engineering, high performance vacuum-deposited OLEDs with external quantum efficiencies (EQEs) of up to 30 % and solution-processable OLEDs with EQEs of up to 10 % have been realized by modifying the cyclometalated or pincer ligands of these metal complexes. These impressive demonstrations reveal that d(8) metal complexes are promising candidates as phosphorescent materials for OLED applications in displays as well as in solid-state lighting in the future.
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Affiliation(s)
- Man-Chung Tang
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Alan Kwun-Wa Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Mei-Yee Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
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Soellner J, Tenne M, Wagenblast G, Strassner T. Phosphorescent Platinum(II) Complexes with Mesoionic 1H
-1,2,3-Triazolylidene Ligands. Chemistry 2016; 22:9914-8. [DOI: 10.1002/chem.201601060] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Johannes Soellner
- Physikalische Organische Chemie; Technische Universität Dresden; 01069 Dresden Germany
| | - Mario Tenne
- Physikalische Organische Chemie; Technische Universität Dresden; 01069 Dresden Germany
| | | | - Thomas Strassner
- Physikalische Organische Chemie; Technische Universität Dresden; 01069 Dresden Germany
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30
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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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Poirier S, Czympiel L, Bélanger-Desmarais N, Mathur S, Reber C. Temperature and pressure variations of d-d luminescence band maxima of bis(pyridylalkenolato)palladium(II) complexes with different ligand substituents: opposite-signed trends. Dalton Trans 2016; 45:6574-81. [PMID: 26961410 DOI: 10.1039/c5dt05068e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Luminescence spectra of two d(8)-configured bis(pyridylalkenolato)palladium(ii) complexes, [Pd{PyCHC(C3F7)O}2] and [Pd{PyCHC(CH3)O}2], are presented at variable temperature and pressure. Bands are assigned as d-d transitions. The heptafluoropropyl and methyl substituents on the ligands have different steric demands, influencing luminescence spectra. Broad bands with maxima at approximately 12 700 cm(-1) (790 nm) for ligands with heptafluoropropyl substituents and 12,100 cm(-1) (830 nm) for ligands with methyl substituents and widths of approximately 2100 cm(-1) for both complexes are observed at 80 K. Quenching of the luminescence is observed as temperature increases. The maxima of [Pd{PyCHC(C3F7)O}2] show a shift of -0.9 ± 0.1 cm(-1) K(-1) due to broadening of the spectra to lower energy. The luminescence maxima of [Pd{PyCHC(CH3)O}2] shift in the opposite direction by +7.2 ± 0.7 cm(-1) K(-1). Shifts with different signs are also obtained from variable-pressure luminescence spectra, with values of +13 ± 2 cm(-1) kbar(-1) and -15 ± 7 cm(-1) kbar(-1) for [Pd{PyCHC(C3F7)O}2] and [Pd{PyCHC(CH3)O}2], respectively. The pressure-induced decrease is unusual and likely caused by intermolecular interactions involving the palladium(ii) center and a vinylic proton of a neighboring complex.
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Affiliation(s)
- Stéphanie Poirier
- Département de chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
| | - Lisa Czympiel
- Institute of Inorganic Chemistry, University of Cologne, D-50939 Cologne, Germany
| | | | - Sanjay Mathur
- Institute of Inorganic Chemistry, University of Cologne, D-50939 Cologne, Germany
| | - Christian Reber
- Département de chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
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32
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Kreitner C, Heinze K. Excited state decay of cyclometalated polypyridine ruthenium complexes: insight from theory and experiment. Dalton Trans 2016; 45:13631-47. [DOI: 10.1039/c6dt01989g] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This perspective article tackles the open question why cyclometalated polypyridine ruthenium(ii) complexes typically only emit very weakly at room temperature and delivers answers beyond the standard schemes involving 3MC and tunneling decay channels.
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Affiliation(s)
- Christoph Kreitner
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg University
- D-55128 Mainz
- Germany
- Graduate School Materials Science in Mainz
| | - Katja Heinze
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg University
- D-55128 Mainz
- Germany
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33
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Expósito JE, Álvarez-Paíno M, Aullón G, Miguel JA, Espinet P. Higher fluorescence in platinum(iv) orthometallated complexes of perylene imine compared with their platinum(ii) or palladium(ii) analogues. Dalton Trans 2015; 44:16164-76. [PMID: 26299307 DOI: 10.1039/c5dt02572a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of 3-perylenylmethylen-4'-ethylaniline () with [Pt2Me4(μ-SMe2)2] (and subsequent addition of PPh3) or with [Pt2(η(3)-C4H7)2(μ-Cl)2] produced cyclometallated Pt(II) complexes [Pt(C^N)Me(PPh3)] () and, respectively, [Pt2(C^N)2(μ-Cl)2] () (HC^N = 3-C20H11CH[double bond, length as m-dash]NC6H4-p-C2H5), with Pt bound to the ortho site of the perylenyl fragment. From the mononuclear complexes [Pt(C^N)L2] (L2 = acac (); S2COMe (); S2CNEt2 () are easily formed. Oxidative addition of methyl iodide to the square-planar Pt(II) complexes , , and gave the corresponding cyclometallated Pt(IV) compounds [Pt(C^N)L2MeI] , and . The X-ray structures of , , and show that the perylenyl fragment remains essentially flat in and and slightly twisted in . Comparison of the optical properties of these Pt(II) complexes with those reported for similar Pd(II) derivatives reveals that the change of metal exerts a notable influence on the UV-vis spectra. In solution at room temperature, all the Pt complexes exhibit fluorescence associated with the perylene fragment with low emission quantum yields for the Pt(II) complexes (<1%) and remarkably higher emission values for the Pt(IV) complexes: up to 29%, with emission lifetimes of 1-5 ns. Time-dependent density functional theory (TD-DFT) calculations were performed on the perylene imine and on representative complexes [M(C^N)(acac)] (M = Pd, Pt) and [Pt(C^N)(acac)MeI] to analyse the absorption spectra. These calculations support a perylene-dominated intraligand π-π*emissive state based on the HOMO and LUMO orbitals of the perylene chromophore, and a ligand-to-ligand charge-transfer (more intense for the Pt(II) complex) that explains the observed influence of the metal on the absorption properties.
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Affiliation(s)
- J Emilio Expósito
- IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain.
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Yam VWW, Au VKM, Leung SYL. Light-Emitting Self-Assembled Materials Based on d8 and d10 Transition Metal Complexes. Chem Rev 2015; 115:7589-728. [DOI: 10.1021/acs.chemrev.5b00074] [Citation(s) in RCA: 1065] [Impact Index Per Article: 118.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vivian Wing-Wah Yam
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Vonika Ka-Man Au
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Sammual Yu-Lut Leung
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
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35
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Ko SB, Park HJ, Gong S, Wang X, Lu ZH, Wang S. Blue phosphorescent N-heterocyclic carbene chelated Pt(ii) complexes with an α-duryl-β-diketonato ancillary ligand. Dalton Trans 2015; 44:8433-43. [DOI: 10.1039/c4dt03085k] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Blue phosphorescent Pt(ii) complexes that display bright blue emission in the solid state have been obtained employing NHC-based C∧C*-chelate ligands and an α-duryl-β-diketonato ancillary ligand that provides steric blocking to minimize intermolecular interactions.
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Affiliation(s)
- Soo-Byung Ko
- Department of Chemistry
- Queen's University
- Kingston
- Canada
| | - Hee-Jun Park
- Department of Chemistry
- Queen's University
- Kingston
- Canada
| | - Shaolong Gong
- Department of Materials Science and Engineering
- University of Toronto
- Toronto
- Canada
| | - Xiang Wang
- Department of Chemistry
- Queen's University
- Kingston
- Canada
| | - Zheng-Hong Lu
- Department of Materials Science and Engineering
- University of Toronto
- Toronto
- Canada
| | - Suning Wang
- Department of Chemistry
- Queen's University
- Kingston
- Canada
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36
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Zhang S, Pattacini R, Braunstein P, De Cola L, Plummer E, Mauro M, Gourlaouen C, Daniel C. Synthesis, structure, and optical properties of Pt(II) and Pd(II) complexes with oxazolyl- and pyridyl-functionalized DPPM-type ligands: a combined experimental and theoretical study. Inorg Chem 2014; 53:12739-56. [PMID: 25420195 DOI: 10.1021/ic501566u] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
New square-planar complexes [Pt(1(-H))2] (2a) [1(-H) = (oxazolin-2-yl)bis(diphenylphosphino)methanide] and [Pd(1(-H))2] (2b), of general formula [M{(Ph2P)2C---C---NCH2CH2O}2] (M = Pt, 2a; M = Pd, 2b), result from deprotonation of 2-{bis(diphenylphosphino)methyl}oxazoline (1) at the PCHP site. The new, functionalized dppm-type ligand 4-{bis(diphenylphosphino)methyl}pyridine, (Ph2P)2CH(4-C5H4N) (4), was prepared by double lithiation and phosphorylation of 4-picoline. In the presence of NEt3, the reactions of 2 equiv of 4 with [PtCl2(NCPh)2] and [Pd(acac)2] (acac = acetylacetonate) afforded [Pt(4(-H))2] (5a) [4(-H) = bis(diphenylphosphino)(pyridin-4-yl)methanide] and [Pd(4(-H))2] (5b), of general formula [M{(Ph2P)2C(4-C5H4N)}2] (M = Pt, 5a; M = Pd, 5b), respectively. In the absence of base, the reactions of 2 equiv of 4 with [PtCl2(NCPh)2] and [PdCl2(NCPh)2] afforded (5a·2HCl) (6a) and (5b·2HCl) (6b), respectively, in which the PCHP proton of 4 has migrated from carbon to nitrogen to give a pyridinium derivative of general formula [M{(Ph2P)2C(4-C5H4NH)}2]Cl2 (M = Pt, 6a; M = Pd, 6b). The complexes 3a, 5a·2MeOH, and 6b·4CH2Cl2 have been structurally characterized by X-ray diffraction. The absorption/emission properties of the Pt(II) complexes 2a and 5a and the Pd(II) complexes 2b and 5b have been investigated by UV-vis spectroscopy and theoretical analysis based on density functional theory. The UV-vis absorption spectra of the neutral complexes recorded in dilute N,N'-dimethylformamide solutions are dominated by intense spin-allowed intraligand transitions in the region below 350 nm. The complexes exhibit charge-transfer bands between 350 and 500 nm. The experimental and theoretical absorption spectra agree qualitatively and point to two low-lying ligand-to-metal charge transfer states that contribute to the bands observed between 350 and 500 nm. The complexes are emissive in frozen solutions at 77 K, in the pure solid state, and when doped into films of poly(methyl methacrylate) but are nonemissive in solution. A red shift is observed when Pt(II) is replaced by Pd(II).
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Affiliation(s)
- Shuanming Zhang
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS/UdS), Université de Strasbourg , 4 rue Blaise Pascal, F-67081 Strasbourg, France
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37
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Juliá F, Aullón G, Bautista D, González-Herrero P. Exploring excited-state tunability in luminescent tris-cyclometalated platinum(IV) complexes: synthesis of heteroleptic derivatives and computational calculations. Chemistry 2014; 20:17346-59. [PMID: 25353375 DOI: 10.1002/chem.201404583] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Indexed: 11/11/2022]
Abstract
The synthesis, structure, electrochemistry, and photophysical properties of a series of heteroleptic tris- cyclometalated Pt(IV) complexes are reported. The complexes mer-[Pt(C^N)2 (C'^N')]OTf, with C^N=C-deprotonated 2-(2,4-difluorophenyl)pyridine (dfppy) or 2-phenylpyridine (ppy), and C'^N'=C-deprotonated 2-(2-thienyl)pyridine (thpy) or 1-phenylisoquinoline (piq), were obtained by reacting bis- cyclometalated precursors [Pt(C^N)2 Cl2] with AgOTf (2 equiv) and an excess of the N'^C'H pro-ligand. The complex mer-[Pt(dfppy)2 (ppy)]OTf was obtained analogously and photoisomerized to its fac counterpart. The new complexes display long-lived luminescence at room temperature in the blue to orange color range. The emitting states involve electronic transitions almost exclusively localized on the ligand with the lowest π-π* energy gap and have very little metal character. DFT and time-dependent DFT (TD-DFT) calculations on mer-[Pt(ppy)2 (C'^N')](+) (C'^N'=thpy, piq) and mer/fac-[Pt(ppy)3](+) support this assignment and provide a basis for the understanding of the luminescence of tris-cyclometalated Pt(IV) complexes. Excited states of LMCT character may become thermally accessible from the emitting state in the mer isomers containing dfppy or ppy as chromophoric ligands, leading to strong nonradiative deactivation. This effect does not operate in the fac isomers or the mer complexes containing thpy or piq, for which nonradiative deactivation originates mainly from vibrational coupling to the ground state.
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Affiliation(s)
- Fabio Juliá
- Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Apdo. 4021, 30071 Murcia (Spain), Fax: (+34) 868-884148
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38
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Steffen A, Costuas K, Boucekkine A, Thibault MH, Beeby A, Batsanov AS, Charaf-Eddin A, Jacquemin D, Halet JF, Marder TB. Fluorescence in Rhoda- and Iridacyclopentadienes Neglecting the Spin–Orbit Coupling of the Heavy Atom: The Ligand Dominates. Inorg Chem 2014; 53:7055-69. [DOI: 10.1021/ic501115k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Andreas Steffen
- Institut
für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Karine Costuas
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS - Université de Rennes 1, 35042 Rennes Cedex, France
| | - Abdou Boucekkine
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS - Université de Rennes 1, 35042 Rennes Cedex, France
| | | | - Andrew Beeby
- Department
of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Andrei S. Batsanov
- Department
of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Azzam Charaf-Eddin
- CEISAM, UMR CNRS 6230, Université de Nantes, 2 rue de la
Houssinière, 44322 Nantes Cedex 3, France
| | - Denis Jacquemin
- CEISAM, UMR CNRS 6230, Université de Nantes, 2 rue de la
Houssinière, 44322 Nantes Cedex 3, France
- Institut Universitaire de France, 103 bd Saint-Michel, 75005 Paris Cedex 05, France
| | - Jean-François Halet
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS - Université de Rennes 1, 35042 Rennes Cedex, France
| | - Todd B. Marder
- Institut
für Anorganische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- Department
of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
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39
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López-Banet L, Santana MD, Piernas MJ, García G, Cerezo J, Requena A, Zúñiga J, Pérez J, García L. Structure and Spectroscopic Properties of Nickel Benzazolate Complexes with Hydrotris(pyrazolyl)borate Ligand. Inorg Chem 2014; 53:5502-14. [DOI: 10.1021/ic5001655] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Luisa López-Banet
- Departamento
de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - M. Dolores Santana
- Departamento
de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - María José Piernas
- Departamento
de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - Gabriel García
- Departamento
de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - Javier Cerezo
- Departamento de
Química Física, Universidad de Murcia, E-30071 Murcia, Spain
| | - Alberto Requena
- Departamento de
Química Física, Universidad de Murcia, E-30071 Murcia, Spain
| | - José Zúñiga
- Departamento de
Química Física, Universidad de Murcia, E-30071 Murcia, Spain
| | - José Pérez
- Departamento de Ingeniería
Minera, Geológica y Cartográfica, Área de Química
Inorgánica, Universidad Politécnica de Cartagena, E-30203 Cartagena, Spain
| | - Luís García
- Departamento de Ingeniería
Minera, Geológica y Cartográfica, Área de Química
Inorgánica, Universidad Politécnica de Cartagena, E-30203 Cartagena, Spain
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40
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Katlenok EA, Balashev KP. Complexes of Rh(III), Ir(III), and Pt(IV) with metallated 2-(n-tolyl)pyridine, ethylendiamine, acetate, and diethyldithiocarbamate ligands. RUSS J GEN CHEM+ 2014. [DOI: 10.1134/s1070363214050247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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41
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Steffen A, Ward RM, Tay MG, Edkins RM, Seeler F, van Leeuwen M, Pålsson LO, Beeby A, Batsanov AS, Howard JAK, Marder TB. Regiospecific Formation and Unusual Optical Properties of 2,5-Bis(arylethynyl)rhodacyclopentadienes: A New Class of Luminescent Organometallics. Chemistry 2014; 20:3652-66. [DOI: 10.1002/chem.201304068] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Indexed: 11/11/2022]
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42
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Juliá F, Bautista D, Fernández-Hernández JM, González-Herrero P. Homoleptic tris-cyclometalated platinum(iv) complexes: a new class of long-lived, highly efficient 3LC emitters. Chem Sci 2014. [DOI: 10.1039/c3sc53187b] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Tris-cyclometalated Pt(IV) complexes are reported for the first time. The facial isomers exhibit long-lived 3LC emissions with quantum yields up to 0.49, the highest ever found for Pt(IV) complexes, combined with a strong oxidizing character in the excited state.
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Affiliation(s)
- Fabio Juliá
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad de Murcia
- 30071 Murcia, Spain
| | | | | | - Pablo González-Herrero
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad de Murcia
- 30071 Murcia, Spain
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43
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Gourlaouen C, Daniel C. Spin–orbit effects in square-planar Pt(ii) complexes with bidentate and terdentate ligands: theoretical absorption/emission spectroscopy. Dalton Trans 2014; 43:17806-19. [DOI: 10.1039/c4dt01822b] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Theoretical “spin-free” (in black) and “spin–orbit” (in red) absorption spectra of [Pt(tpy)Cl]+ and electronic densities characterizing the main intense bands MLCT/XLCT at 384 nm, and MLCT/LC at 326 nm and 250 nm (the experimental spectrum is shown in the inset).
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Affiliation(s)
- Christophe Gourlaouen
- Laboratoire de Chimie Quantique UMR-7177 CNRS-UdS
- Université de Strasbourg
- F-67008 Strasbourg, France
| | - Chantal Daniel
- Laboratoire de Chimie Quantique UMR-7177 CNRS-UdS
- Université de Strasbourg
- F-67008 Strasbourg, France
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44
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Tronnier A, Nischan N, Metz S, Wagenblast G, Münster I, Strassner T. Phosphorescent C∧C* Cyclometalated PtIIDibenzofuranyl-NHC Complexes - An Auxiliary Ligand Study. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201301398] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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45
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López‐Banet L, Santana MD, García G, Piernas MJ, García L, Pérez J, Calderón‐Casado A, Barandika G. Crystal Structures and Spectroscopic and Theoretical Properties of Pentacoordinate Nickel(II) Complexes Containing Tris(pyrazolyl)borate and Quinolinate Ligands. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300339] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Luisa López‐Banet
- Universidad de Murcia, Regional Campus of International Excellence “Campus Mare Nostrum” Dpto. Química Inorgánica, 30071 Murcia, Spain, Fax: +34‐868‐887458, http://www.um.es/
| | - M. Dolores Santana
- Universidad de Murcia, Regional Campus of International Excellence “Campus Mare Nostrum” Dpto. Química Inorgánica, 30071 Murcia, Spain, Fax: +34‐868‐887458, http://www.um.es/
| | - Gabriel García
- Universidad de Murcia, Regional Campus of International Excellence “Campus Mare Nostrum” Dpto. Química Inorgánica, 30071 Murcia, Spain, Fax: +34‐868‐887458, http://www.um.es/
| | - M. José Piernas
- Universidad de Murcia, Regional Campus of International Excellence “Campus Mare Nostrum” Dpto. Química Inorgánica, 30071 Murcia, Spain, Fax: +34‐868‐887458, http://www.um.es/
| | - Luis García
- Universidad Politécnica de Cartagena, Dpto. Ingeniería Minera, Geológica y Cartográfica (Área de Química Inorgánica), 30203 Cartagena (Murcia), Spain, http://www.upct.es/
| | - José Pérez
- Universidad Politécnica de Cartagena, Dpto. Ingeniería Minera, Geológica y Cartográfica (Área de Química Inorgánica), 30203 Cartagena (Murcia), Spain, http://www.upct.es/
| | - Ainhoa Calderón‐Casado
- Departamento de Mineralogía y Petrología, Facultad de Ciencia y Tecnología, Apdo. 644, 48080 Bilbao, Spain, http://www.ehu.es/p200‐home/es
| | - Gotzone Barandika
- Departamento de Química Inorgánica, Facultad de Farmacia, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria‐Gasteiz, Spain, http://www.ehu.es/p200‐home/es
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46
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Gildea LF, Batsanov AS, Williams JAG. Bright orange/red-emitting rhodium(III) and iridium(III) complexes: tridentate N^C^N-cyclometallating ligands lead to high luminescence efficiencies. Dalton Trans 2013; 42:10388-93. [PMID: 23770817 DOI: 10.1039/c3dt51211h] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rhodium(III) complexes rarely display strong phosphorescence, in contrast to well-known iridium(III) complexes with cyclometallating ligands. This study shows how 1,3-bis(1-isoquinolyl)benzene cyclometallates to Rh(III) through N^C^N-coordination to give complexes with unprecedented phosphorescence quantum yields at room temperature. Their highly emissive Ir(III) analogues are also described.
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Affiliation(s)
- Louise F Gildea
- Department of Chemistry, University of Durham, Durham, DH1 3LE, UK
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Schmidbauer S, Hohenleutner A, König B. Chemical degradation in organic light-emitting devices: mechanisms and implications for the design of new materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:2114-29. [PMID: 23450816 DOI: 10.1002/adma.201205022] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Indexed: 05/26/2023]
Abstract
Degradation of the materials in organic light-emitting devices (OLEDs) is the major impediment for the development of economically feasible, highly efficient and durable devices for commercial applications. Even though this chemical degradation is complex and the least understood of the different degradation modes in OLEDs, scientists were successful in providing insight into some of the responsible processes. In this progress report we will review recent advances in the elucidation of chemical degradation mechanisms: First possible reasons for defect formation and the most common and important methods to investigate those processes are covered before discussing the reactions and their products for the different types of materials present in a device. We summarize commonalities in the occurring mechanisms, and identify structural features and moieties that can be detrimental to operational stability. Some of the resulting implications on the development of new materials are presented and backed by concrete examples from literature.
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Affiliation(s)
- Susanna Schmidbauer
- Institut für Organische Chemie, Universität Regensburg, Universitätsstraße 31, D-93053 Regensburg, Germany
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48
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Organometallic Complexes of Pyridines Together with Diverse Heterocycles as Ligands. ADVANCES IN HETEROCYCLIC CHEMISTRY 2013. [DOI: 10.1016/b978-0-12-407777-5.00002-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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49
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Katlenok EA, Balashev KP. Cyclometalated rhodium complexes of phenyl- and diphenyl-substituted oxazole and thiazole luminophores. RUSS J GEN CHEM+ 2012. [DOI: 10.1134/s107036321210012x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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50
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Baggaley E, Weinstein JA, Williams JG. Lighting the way to see inside the live cell with luminescent transition metal complexes. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.03.018] [Citation(s) in RCA: 311] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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