1
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Kiseleva MA, Churakov AV, Taydakov IV, Metlin MT, Kozyukhin SA, Bezzubov SI. Aggregation-induced emission of cyclometalated rhodium(III) and iridium(III) phenylpyridine complexes with ancillary 1,3-diketones. Dalton Trans 2023; 52:17861-17872. [PMID: 37975537 DOI: 10.1039/d3dt02651e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
A joint structural and spectroscopic study of simple bis-cyclometataled rhodium(III) and iridium(III) complexes with 2-phenylpyridine and aromatic β-diketones (dibenzoylmethane, benzoylacetone, benzoyltrifluoroacetone, and 2-thenoyltrifluoroacetone) reveals an interplay between the solid-state emission efficiency and crystal packing peculiarities of the complexes. Although the prepared rhodium(III) cyclometalates are isostructural with iridium(III) analogues, different types of π-π interactions are responsible for the aggregation-induced emission (AIE) of the complexes depending on the metal ion. For iridium(III) complexes, pyridyl-pyridyl contacts are essential for AIE because they lower the energy of the emissive metal-to-ligand charge transfer state below that of the non-emissive state located at the ancillary ligand. Enabled by phenyl-pyridyl interactions partially blocking the population of non-emissive d-d states, solid-state phosphorescence enhancement is successfully achieved in a rhodium(III) complex with ancillary benzoyltrifluoroacetone, which is the first example of a rhodium complex exhibiting AIE.
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Affiliation(s)
- Marina A Kiseleva
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia.
- Department of Chemistry, Lomonosov Moscow State University, Lenin's Hills 1, Moscow, 119991, Russia
| | - Andrei V Churakov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia.
| | - Ilya V Taydakov
- P.N. Lebedev Physical Institute, Russian Academy of Sciences, 53 Leninsky Prospect, Moscow 119991, Russia
| | - Mikhail T Metlin
- P.N. Lebedev Physical Institute, Russian Academy of Sciences, 53 Leninsky Prospect, Moscow 119991, Russia
- Bauman Moscow State Technical University, 2-ya Baumanskaya Str. 5/1, Moscow, 105005, Russia
| | - Sergey A Kozyukhin
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia.
| | - Stanislav I Bezzubov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia.
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2
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Kanbe A, Yokoi K, Yamada Y, Tsurui M, Kitagawa Y, Hasegawa Y, Ogata D, Yuasa J, Aoki S. Optical Resolution of Carboxylic Acid Derivatives of Homoleptic Cyclometalated Iridium(III) Complexes via Diastereomers Formed with Chiral Auxiliaries. Inorg Chem 2023; 62:11325-11341. [PMID: 37432912 PMCID: PMC10369494 DOI: 10.1021/acs.inorgchem.3c00685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Indexed: 07/13/2023]
Abstract
We report on a facile method for the optical resolution of cyclometalated iridium(III) (Ir(III)) complexes via diastereomers formed with chiral auxiliaries. The racemic carboxylic acids of Ir(III) complexes (fac-4 (fac-Ir(ppyCO2H)3 (ppy: 2-phenylpyridine)), fac-6 (fac-Ir(tpyCO2H)3 (tpy: 2-(4'-tolyl)pyridine)), and fac-13 (fac-Ir(mpiqCO2H)3 (mpiq: 1-(4'-methylphenyl)isoquinoline))) were converted into the diastereomers, Δ- and Λ-forms of fac-9 (from fac-6), fac-10 (from fac-4), fac-11 (from fac-6), and fac-14 (from fac-13), respectively, by the condensation with (1R,2R)-1,2-diaminocyclohexane or (1R,2R)-2-aminocyclohexanol. The resulting diastereomers were separated by HPLC (with a nonchiral column) or silica gel column chromatography, and their absolute stereochemistry was determined by X-ray single-crystal structure analysis and CD (circular dichroism) spectra. Spectra of all diastereomers of the Ir(III) complexes are reported. Hydrolysis of the ester moieties of Δ- and Λ-forms of fac-10, fac-11, and fac-14 gave both enantiomers of the corresponding carboxylic acid derivatives in the optically pure forms, Δ-fac and Λ-fac-4, -6, and -13, respectively.
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Affiliation(s)
- Azusa Kanbe
- Faculty
of Pharmaceutical Science, Tokyo University
of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Kenta Yokoi
- Faculty
of Pharmaceutical Science, Tokyo University
of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Yasuyuki Yamada
- Department
of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
- Research
Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
- JST,
PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Makoto Tsurui
- Graduate
School of Chemical Sciences and Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
| | - Yuichi Kitagawa
- Faculty of
Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-Ku, Sapporo, Hokkaido 060-8628, Japan
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita-21, Nishi-10, Kita-Ku, Sapporo, Hokkaido 001-0021, Japan
| | - Yasuchika Hasegawa
- Faculty of
Engineering, Hokkaido University, Kita-13, Nishi-8, Kita-Ku, Sapporo, Hokkaido 060-8628, Japan
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita-21, Nishi-10, Kita-Ku, Sapporo, Hokkaido 001-0021, Japan
| | - Daiji Ogata
- Faculty
of Science, Tokyo University of Science, 1-3 Kagurazaka,
Shinjuku-ku, Tokyo 162-8601, Japan
| | - Junpei Yuasa
- Faculty
of Science, Tokyo University of Science, 1-3 Kagurazaka,
Shinjuku-ku, Tokyo 162-8601, Japan
| | - Shin Aoki
- Faculty
of Pharmaceutical Science, Tokyo University
of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Research
Institute for Science and Technology (RIST), Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Research
Institute for Biomedical Science (RIBS), Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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3
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Peng M, Lin J, Lu W, Roisnel T, Guerchais V, Doucet H, Soulé JF. Palladium-Catalyzed C-H Bond Arylation of Cyclometalated Difluorinated 2-Arylisoquinolinyl Iridium(III) Complexes. Chemistry 2021; 27:12552-12557. [PMID: 34236719 DOI: 10.1002/chem.202102006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Indexed: 11/09/2022]
Abstract
The utility of C-H bond functionalization of metalated ligands for the elaboration of aryl-functionalized difluorinated-1-arylisoquinolinyl Ir(III) complexes has been explored. Bis[(3,5-difluorophenyl)isoquinolinyl](2,2,6,6-tetramethyl-3,5-heptanedionato) iridium(III) undergoes Pd-catalyzed C-H bond arylation with aryl bromides. The reaction regioselectively occurred at the C-H bond flanked by the two fluorine atoms of the difluoroaryl unit, and on both cyclometalated ligands. This post-functionalization gives a straightforward access to modified complexes in only one manipulation and allows to introduce thermally sensitive functional groups, such as trifluoromethyl, nitrile, benzoyl, or ester. The X-ray crystallography, photophysical, and electrochemical properties of the diarylated complexes were investigated. Whatever the nature of the incorporated substituted aryl groups is, all obtained complexes emit red phosphorescence (622-632 nm) with similar lifetimes (1.9-2 μs).
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Affiliation(s)
- Marie Peng
- Univ Rennes, CNRS, UMR6226, 3500, Rennes, France
| | - Jinqiang Lin
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, P. R. China
| | - Wei Lu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, P. R. China
| | | | | | - Henri Doucet
- Univ Rennes, CNRS, UMR6226, 3500, Rennes, France
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4
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Kuznetsov KM, Kritchenkov IS, Shakirova JR, Gurzhiy VV, Pavlovskiy VV, Porsev VV, Sokolov VV, Tunik SP. Red‐to‐NIR Iridium(III) Emitters: Synthesis, Photophysical and Computational Study, the Effects of Cyclometallating and β‐Diketonate Ligands. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100189] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Kirill M. Kuznetsov
- Institute of Chemistry St. Petersburg State University Universitetskii pr. 26 198504 St. Petersburg Russia
| | - Ilya S. Kritchenkov
- Institute of Chemistry St. Petersburg State University Universitetskii pr. 26 198504 St. Petersburg Russia
| | - Julia R. Shakirova
- Institute of Chemistry St. Petersburg State University Universitetskii pr. 26 198504 St. Petersburg Russia
| | - Vladislav V. Gurzhiy
- Institute of Earth Sciences St. Petersburg State University University emb. 7/9 199034 St. Petersburg Russia
| | - Vladimir V. Pavlovskiy
- Institute of Chemistry St. Petersburg State University Universitetskii pr. 26 198504 St. Petersburg Russia
| | - Vitaly V. Porsev
- Institute of Chemistry St. Petersburg State University Universitetskii pr. 26 198504 St. Petersburg Russia
| | - Viktor V. Sokolov
- Institute of Chemistry St. Petersburg State University Universitetskii pr. 26 198504 St. Petersburg Russia
| | - Sergey P. Tunik
- Institute of Chemistry St. Petersburg State University Universitetskii pr. 26 198504 St. Petersburg Russia
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5
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Abstract
Metal-catalyzed activations of inert sp3C–H bonds have recently brought a revolution in the synthesis of useful molecules and molecular materials, due to the interest of the formed sp3C–SiR3 silanes, stable organometallic species, and for further functionalizations that sp3C–H bonds cannot reach directly.
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Affiliation(s)
- Bin Li
- School of Biotechnology and Health Sciences
- Wuyi University
- Jiangmen 529020
- P. R. China
| | - Pierre H. Dixneuf
- Univ. Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226
- F-35000 Rennes
- France
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6
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Huang HY, Benzai A, Shi X, Doucet H. Effective Tools for the Metal-Catalyzed Regiodivergent Direct Arylations of (Hetero)arenes. CHEM REC 2020; 21:343-356. [PMID: 33332755 DOI: 10.1002/tcr.202000145] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/27/2020] [Accepted: 11/27/2020] [Indexed: 12/13/2022]
Abstract
The direct functionalization of two different C-H bonds of the same organic molecule using different procedures - also called regiodivergent C-H bond functionalization - currently represents an important research topic in organic chemistry, as it demonstrates the versatility of C-H bond functionalization methodology. Over the last decade, the number of tools to control such regiodivergent C-H bond functionalizations has increased significantly. In this account, we will present the various tools that allowed us to arylate different positions of various (hetero)arenes, via a C-H bond functionalization, using palladium or ruthenium catalysis.
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Affiliation(s)
- Hai-Yun Huang
- CNRS, ISCR-UMR 6226, Univ Rennes, F-35000, Rennes, France
| | - Amal Benzai
- CNRS, ISCR-UMR 6226, Univ Rennes, F-35000, Rennes, France
| | - Xinzhe Shi
- CNRS, ISCR-UMR 6226, Univ Rennes, F-35000, Rennes, France
| | - Henri Doucet
- CNRS, ISCR-UMR 6226, Univ Rennes, F-35000, Rennes, France
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7
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Ryu CH, Kim M, Sohn C, Hong JH, Im S, Kim SY, Lee KM. Monodentate Benzo[
d
]imidazole‐Based Iridium(III) Complexes and Their Dual Fluorescent and Phosphorescent Emissions. B KOREAN CHEM SOC 2020. [DOI: 10.1002/bkcs.11949] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chan Hee Ryu
- Department of ChemistryInstitute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Mingi Kim
- Department of ChemistryInstitute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Changho Sohn
- Department of ChemistryInstitute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Ju Hyun Hong
- Department of ChemistryDivision of Chemistry and Biochemistry, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Sehee Im
- Department of ChemistryDivision of Chemistry and Biochemistry, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - So Yeon Kim
- Department of ChemistryDivision of Chemistry and Biochemistry, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Kang Mun Lee
- Department of ChemistryInstitute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
- Department of ChemistryDivision of Chemistry and Biochemistry, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
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8
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Kataoka Y, Okuno K, Yano N, Ueda H, Kawamoto T, Handa M. New luminescent cyclometalated iridium complexes prepared by the post-synthetic modification. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.09.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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9
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Penconi M, Cazzaniga M, Kesarkar S, Baldoli C, Mussini PR, Ceresoli D, Bossi A. β-Diketonate ancillary ligands in heteroleptic iridium complexes: a balance between synthetic advantages and photophysical troubles. Photochem Photobiol Sci 2018; 17:1169-1178. [DOI: 10.1039/c8pp00052b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
How the triplet energy of β-diketonate ancillary ligands in Ir(iii) complexes affects the phosphorescence emission: photochemical and electrochemical investigations and DFT calculations shed light on the dark triplet excited states.
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Affiliation(s)
- Marta Penconi
- Istituto di Scienze e Tecnologie Molecolari ISTM – CNR and SmartMatLab Centre
- 20138 Milano
- Italy
| | - Marco Cazzaniga
- Istituto di Scienze e Tecnologie Molecolari ISTM – CNR and SmartMatLab Centre
- 20138 Milano
- Italy
| | - Sagar Kesarkar
- Istituto di Scienze e Tecnologie Molecolari ISTM – CNR and SmartMatLab Centre
- 20138 Milano
- Italy
| | - Clara Baldoli
- Istituto di Scienze e Tecnologie Molecolari ISTM – CNR and SmartMatLab Centre
- 20138 Milano
- Italy
| | - Patrizia R. Mussini
- Dipartimento di Chimica
- Università degli Studi di Milano and SmartMatLab Centre
- 20133 Milano
- Italy
| | - Davide Ceresoli
- Istituto di Scienze e Tecnologie Molecolari ISTM – CNR and SmartMatLab Centre
- 20138 Milano
- Italy
| | - Alberto Bossi
- Istituto di Scienze e Tecnologie Molecolari ISTM – CNR and SmartMatLab Centre
- 20138 Milano
- Italy
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10
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Zhang Z, Dixneuf PH, Soulé JF. Late stage modifications of P-containing ligands using transition-metal-catalysed C–H bond functionalisation. Chem Commun (Camb) 2018; 54:7265-7280. [DOI: 10.1039/c8cc02821d] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Recent advances in C–H bond functionalisation of phosphorus derivatives are presented, with a special attention to preparation of phosphine ligands.
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Affiliation(s)
- Zhuan Zhang
- Univ Rennes
- CNRS
- ISCR UMR 6226
- F-35000 Rennes
- France
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11
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Mukhopadhyay S, Mitra K, Paitandi RP, Singh RS, Singh S, Ray B, Pandey DS. Polymerization of 1-(2-Propynyl)-3-methylimidazolium Bromide using Cyclometalated Pd(II) Catalysts and Study of the Interaction of Ensuing Oligomer with BSA. ChemistrySelect 2017. [DOI: 10.1002/slct.201700555] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sujay Mukhopadhyay
- Department of Chemistry; Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Kheyanath Mitra
- Department of Chemistry; Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | | | - Roop Shikha Singh
- Department of Chemistry; Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Shikha Singh
- Department of Chemistry; Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Biswajit Ray
- Department of Chemistry; Institute of Science; Banaras Hindu University; Varanasi- 221005 India
| | - Daya Shankar Pandey
- Department of Chemistry; Institute of Science; Banaras Hindu University; Varanasi- 221005 India
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12
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Davidson R, Hsu YT, Bhagani C, Yufit D, Beeby A. Exploring the Chemistry and Photophysics of Substituted Picolinates Positional Isomers in Iridium(III) Bisphenylpyridine Complexes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00179] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ross Davidson
- Department of Chemistry, Durham University, South Road, Durham DH1
3LE, United Kingdom
| | - Yu-Ting Hsu
- Department of Chemistry, Durham University, South Road, Durham DH1
3LE, United Kingdom
| | - Chandni Bhagani
- Department of Chemistry, Durham University, South Road, Durham DH1
3LE, United Kingdom
| | - Dmitry Yufit
- Department of Chemistry, Durham University, South Road, Durham DH1
3LE, United Kingdom
| | - Andrew Beeby
- Department of Chemistry, Durham University, South Road, Durham DH1
3LE, United Kingdom
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13
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Daniels RE, Culham S, Hunter M, Durrant MC, Probert MR, Clegg W, Williams JAG, Kozhevnikov VN. When two are better than one: bright phosphorescence from non-stereogenic dinuclear iridium(III) complexes. Dalton Trans 2016; 45:6949-62. [PMID: 26983757 DOI: 10.1039/c6dt00881j] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of eight dinuclear iridium(iii) complexes has been prepared, featuring 4,6-diarylpyrimidines L(y) as bis-N^C-coordinating bridging ligands. The metal ions are also coordinated by a terminal N^C^N-cyclometallating ligand L(X) based on 1,3-di(2-pyridyl)benzene, and by a monodentate chloride or cyanide. The general formula of the compounds is {IrL(X)Z}2L(y) (Z = Cl or CN). The family comprises examples with three different L(X) ligands and five different diarylpyrimidines L(y), of which four are diphenylpyrimidines and one is a dithienylpyrimidine. The requisite proligands have been synthesised via standard cross-coupling methodology. The synthesis of the complexes involves a two-step procedure, in which L(X)H is reacted with IrCl3·3H2O to form dinuclear complexes of the form [IrL(X)Cl(μ-Cl)]2, followed by treatment with the diarylpyrimidine L(y)H2. Crucially, each complex is formed as a single compound only: the strong trans influence of the metallated rings dictates the relative disposition of the ligands, whilst the use of symmetrically substituted tridentate ligands eliminates the possibility of Λ and Δ enantiomers that are obtained when bis-bidentate units are linked through bridging ligands. The crystal structure of one member of the family has been obtained using a synchrotron X-ray source. All of the complexes are very brightly luminescent, with emission maxima in solution varying over the range 517-572 nm, according to the identity of the ligands. The highest-energy emitter is the cyanide derivative whilst the lowest is the complex with the dithienylpyrimidine. The trends in both the absorption and emission energies as a function of ligand substituent have been rationalised accurately with the aid of TD-DFT calculations. The lowest-excited singlet and triplet levels correlate with the trend in the HOMO-LUMO gap. All the complexes have quantum yields that are close to unity and phosphorescence lifetimes - of the order of 500 ns - that are unusually short for complexes of such brightness. These impressive properties stem from an unusually high rate of radiative decay, possibly due to spin-orbit coupling pathways being facilitated by the second metal ion, and to low non-radiative decay rates that may be related to the rigidity of the dinuclear scaffold.
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Affiliation(s)
- Ruth E Daniels
- Department of Applied Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK.
| | - Stacey Culham
- Department of Applied Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK.
| | - Michael Hunter
- Department of Applied Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK.
| | - Marcus C Durrant
- Department of Applied Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK.
| | - Michael R Probert
- School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - William Clegg
- School of Chemistry, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | | | - Valery N Kozhevnikov
- Department of Applied Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK.
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14
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Kang GJ, Ren XF, He QQ. Theoretical study on effect of thiophene substitution on the structure and phosphorescence quantum yields of red-emitting iridium(III) emitters in OLEDs. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2015.12.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Kesarkar S, Mróz W, Penconi M, Pasini M, Destri S, Cazzaniga M, Ceresoli D, Mussini PR, Baldoli C, Giovanella U, Bossi A. Near-IR Emitting Iridium(III) Complexes with Heteroaromatic β-Diketonate Ancillary Ligands for Efficient Solution-Processed OLEDs: Structure-Property Correlations. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201509798] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sagar Kesarkar
- Istituto di Scienze e Tecnologie Molecolari-; CNR and SmartMatLab Center; Via C. Golgi 19 20133 Milano Italy
| | - Wojciech Mróz
- Istituto per lo Studio delle Macromolecole-; CNR; Via E. Bassini 15 20133 Milano Italy
| | - Marta Penconi
- Istituto di Scienze e Tecnologie Molecolari-; CNR and SmartMatLab Center; Via C. Golgi 19 20133 Milano Italy
| | - Mariacecilia Pasini
- Istituto per lo Studio delle Macromolecole-; CNR; Via E. Bassini 15 20133 Milano Italy
| | - Silvia Destri
- Istituto per lo Studio delle Macromolecole-; CNR; Via E. Bassini 15 20133 Milano Italy
| | - Marco Cazzaniga
- Istituto di Scienze e Tecnologie Molecolari-; CNR and SmartMatLab Center; Via C. Golgi 19 20133 Milano Italy
| | - Davide Ceresoli
- Istituto di Scienze e Tecnologie Molecolari-; CNR and SmartMatLab Center; Via C. Golgi 19 20133 Milano Italy
| | - Patrizia R. Mussini
- Dipartimento di Chimica; Università degli Studi di Milano; Via Golgi 19 20133 Milano Italy
| | - Clara Baldoli
- Istituto di Scienze e Tecnologie Molecolari-; CNR and SmartMatLab Center; Via C. Golgi 19 20133 Milano Italy
| | - Umberto Giovanella
- Istituto per lo Studio delle Macromolecole-; CNR; Via E. Bassini 15 20133 Milano Italy
| | - Alberto Bossi
- Istituto di Scienze e Tecnologie Molecolari-; CNR and SmartMatLab Center; Via C. Golgi 19 20133 Milano Italy
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16
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Kesarkar S, Mróz W, Penconi M, Pasini M, Destri S, Cazzaniga M, Ceresoli D, Mussini PR, Baldoli C, Giovanella U, Bossi A. Near-IR Emitting Iridium(III) Complexes with Heteroaromatic β-Diketonate Ancillary Ligands for Efficient Solution-Processed OLEDs: Structure-Property Correlations. Angew Chem Int Ed Engl 2016; 55:2714-8. [PMID: 26804423 DOI: 10.1002/anie.201509798] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/16/2015] [Indexed: 01/08/2023]
Abstract
Three NIR-emitting neutral Ir(III) complexes [Ir(iqbt)2 (dpm)] (1), [Ir(iqbt)2 (tta)] (2), and [Ir(iqbt)2 (dtdk)] (3) based on the 1-(benzo[b]thiophen-2-yl)-isoquinolinate (iqtb) were synthesized and characterized (dpm=2,2,6,6-tetramethyl-3,5-heptanedionate; tta=2-thienoyltrifluoroacetonate; dtdk=1,3-di(thiophen-2-yl)propane-1,3-dionate). The compounds emit between λ=680 and 850 nm with high luminescence quantum yields (up to 16 %). By combining electrochemistry, photophysical measurements, and computational modelling, the relationship between the structure, energy levels, and properties were investigated. NIR-emitting, solution-processed phosphorescent organic light-emitting devices (PHOLEDs) were fabricated using the complexes. The devices show remarkable external quantum efficiencies (above 3 % with 1) with negligible efficiency roll-off values, exceeding the highest reported values for solution-processible NIR emitters.
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Affiliation(s)
- Sagar Kesarkar
- Istituto di Scienze e Tecnologie Molecolari-, CNR and SmartMatLab Center, Via C. Golgi 19, 20133, Milano, Italy
| | - Wojciech Mróz
- Istituto per lo Studio delle Macromolecole-, CNR, Via E. Bassini 15, 20133, Milano, Italy
| | - Marta Penconi
- Istituto di Scienze e Tecnologie Molecolari-, CNR and SmartMatLab Center, Via C. Golgi 19, 20133, Milano, Italy
| | - Mariacecilia Pasini
- Istituto per lo Studio delle Macromolecole-, CNR, Via E. Bassini 15, 20133, Milano, Italy
| | - Silvia Destri
- Istituto per lo Studio delle Macromolecole-, CNR, Via E. Bassini 15, 20133, Milano, Italy
| | - Marco Cazzaniga
- Istituto di Scienze e Tecnologie Molecolari-, CNR and SmartMatLab Center, Via C. Golgi 19, 20133, Milano, Italy
| | - Davide Ceresoli
- Istituto di Scienze e Tecnologie Molecolari-, CNR and SmartMatLab Center, Via C. Golgi 19, 20133, Milano, Italy
| | - Patrizia R Mussini
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milano, Italy
| | - Clara Baldoli
- Istituto di Scienze e Tecnologie Molecolari-, CNR and SmartMatLab Center, Via C. Golgi 19, 20133, Milano, Italy
| | - Umberto Giovanella
- Istituto per lo Studio delle Macromolecole-, CNR, Via E. Bassini 15, 20133, Milano, Italy.
| | - Alberto Bossi
- Istituto di Scienze e Tecnologie Molecolari-, CNR and SmartMatLab Center, Via C. Golgi 19, 20133, Milano, Italy.
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Juliá F, Bautista D, González-Herrero P. Developing strongly luminescent platinum(IV) complexes: facile synthesis of bis-cyclometalated neutral emitters. Chem Commun (Camb) 2015; 52:1657-60. [PMID: 26659999 DOI: 10.1039/c5cc09566b] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A straightforward, one-pot procedure has been developed for the synthesis of bis-cyclometalated chloro(methyl)platinum(IV) complexes with a wide variety of heteroaromatic ligands of the 2-arylpyridine type. The new compounds exhibit phosphorescent emissions in the blue to orange colour range and represent the most efficient Pt(IV) emitters reported to date, with quantum yields up to 0.81 in fluid solutions at room temperature.
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Affiliation(s)
- Fabio Juliá
- Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Apdo. 4021, 30071 Murcia, Spain.
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Howarth AJ, Majewski MB, Brown CM, Lelj F, Wolf MO, Patrick BO. Emissive Ir(III) complexes bearing thienylamido groups on a 1,10-phenanthroline scaffold. Dalton Trans 2015; 44:16272-9. [PMID: 26278384 DOI: 10.1039/c5dt02691a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis, structures and photophysical properties of a series of bis-cyclometallated Ir(iii) complexes bearing phenylpyrazole (ppz) cyclometallating ligands and phenanthroline-based ancillary ligands containing thienyl- and bithienylamido groups are reported. All complexes are emissive in solution, while in PMMA films strong emission is observed from the thienylamido substituted complex with no emission from the bithienylamido complex. The bithienylamido substituted complex has an excited state lifetime which is significantly longer than the emission lifetime, attributed to the population of non-equilibrated (3)MLCT and (3)LC states in this complex. This represents a rare example of this unusual excited state behaviour. DFT calculations show that the emitting (3)MLCT state and the dark (3)LC state on bithiophene are close in energy and that a large change in the triplet state geometry occurs upon excitation that effectively lowers the energy of the (3)MLCT state below that of the dark (3)LC state. The low quantum yield of the bithienylamido complex is attributed to a structural rearrangement upon relaxation back to the ground state, opening a non-radiative decay pathway.
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Affiliation(s)
- Ashlee J Howarth
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6 T 1Z1, Canada.
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Dang TT, Bonneau M, Gareth Williams JA, Le Bozec H, Doucet H, Guerchais V. Pd-Catalyzed Functionalization of the Thenoyltrifluoroacetone Coligands by Aromatic Dyes in Bis(cyclometallated) IrIIIComplexes: From Phosphorescence to Fluorescence? Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500227] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Paul A, Das N, Halpin Y, Vos JG, Pryce MT. Carboxy derivatised Ir(iii) complexes: synthesis, electrochemistry, photophysical properties and photocatalytic hydrogen generation. Dalton Trans 2015; 44:10423-30. [DOI: 10.1039/c5dt00324e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this contribution the synthesis and characterisation of a series of novel mixed ligand iridium(iii) complexes, functionalised with a carboxy ester or phosphonate groups are reported.
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Affiliation(s)
- Avishek Paul
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Nivedita Das
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Yvonne Halpin
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Johannes G. Vos
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Mary T. Pryce
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
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Lee YH, Park J, Jo SJ, Kim M, Lee J, Lee SU, Lee MH. Manipulation of Phosphorescence Efficiency of Cyclometalated Iridium Complexes by Substitutedo-Carboranes. Chemistry 2014; 21:2052-61. [DOI: 10.1002/chem.201405433] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Indexed: 11/06/2022]
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Bondarchuk SV, Minaev BF. Electronic descriptors for analytical use of the benzidine-based compounds and the mechanism of oxidative coupling of anilines. J PHYS ORG CHEM 2014. [DOI: 10.1002/poc.3311] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sergey V. Bondarchuk
- Department of Organic Chemistry; Bogdan Khmelnitsky Cherkasy National University; Blvd. Shevchenko 81 18031 Cherkasy Ukraine
| | - Boris F. Minaev
- Department of Organic Chemistry; Bogdan Khmelnitsky Cherkasy National University; Blvd. Shevchenko 81 18031 Cherkasy Ukraine
- Department of Physics; Tomsk State University; Pr. Lenina, 36 634050 Tomsk Russia
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