1
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Olumba ME, O'Donnell RM, Rohrabaugh TN, Teets TS. Triplet-Triplet Energy Transfer in Bis-Cyclometalated Iridium Complexes with Pyrene-Substituted Isocyanides. Inorg Chem 2023; 62:13702-13711. [PMID: 37579498 DOI: 10.1021/acs.inorgchem.3c00457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
Nonlinear optical (NLO) materials are able to modulate responses of electromagnetic radiation, leading to phenomena critical to modern telecommunications technologies. The last two decades have seen significant advances in the area of molecular nonlinear chromophores, particularly with respect to reverse-saturable absorption (RSA). Here, we introduce a strategy for intense excited-state absorption (ESA) that involves bis-cyclometalated iridium complexes with isocyanide ancillary ligands decorated with pyrene triplet acceptors. Upon excitation, the complexes undergo rapid triplet-triplet energy transfer (TTET) to the acceptor excited states. This report describes five bis-cyclometalated iridium complexes using two different pyrene-substituted isocyanides with the general formula [Ir(C^N)2(CNAr)2]PF6 (C^N = cyclometalating ligand, CNAr = isocyanide ancillary ligand: CNArpyr = 2,6-dimethyl-4-(1-pyrenyl)phenyl isocyanide, CNpyr = 1-pyrenyl isocyanide). The synthesized complexes were thoroughly characterized via 1H and 13C{1H} NMR spectroscopy, Fourier-transform Infrared spectroscopy, and electrospray ionization mass spectrometry. The excited states were evaluated with UV-vis absorption, steady-state and time-resolved photoluminescence, and transient absorption spectroscopy. Phosphorescence is completely quenched at room temperature, but in the solvent glass matrix at 77 K, there is luminescence originating from a π → π* triplet state on the pyrene moiety, abbreviated herein as 3pyrene. All five complexes display intense and long-lived ESA originating from the 3pyrene state. The localization of the ground-state absorption on the cyclometalating ligands and the excited-state absorption on the pyrene moiety allows for independent tuning of ground-state absorption (GSA) and ESA to optimize RSA and other NLO attributes.
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Affiliation(s)
- Morris E Olumba
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Room 112, Houston, Texas 77204-5003, United States
| | - Ryan M O'Donnell
- U.S. Army Combat Capabilities Development Command, Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, United States
| | - Thomas N Rohrabaugh
- U.S. Army Combat Capabilities Development Command, Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, United States
| | - Thomas S Teets
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Room 112, Houston, Texas 77204-5003, United States
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2
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Jiang C, Cañada LM, Nguyen NB, Halamicek MDS, Nguyen SH, Teets TS. Substituent-Dependent Azide Addition to Isocyanides Generates Strongly Luminescent Iridium Complexes. J Am Chem Soc 2023; 145:1227-1235. [PMID: 36603163 DOI: 10.1021/jacs.2c11062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Ligand-centered functionalization reactions offer diverse strategies to prepare luminescent organometallic compounds. These compounds can have unique structures that are not accessible via traditional coordination chemistry and can possess enhanced or unusual photophysical properties. Here we show that bis-cyclometalated iridium bis-isocyanide complexes (1) react with azide (N3-) to form novel luminescent structures. The fate of the reaction with azide is determined primarily by the substituent on the aryl isocyanide. Those with electron-withdrawing substituents (CF3 or NO2) react with 1 equiv of azide followed by N2 extrusion, forming aryl cyanamido products (2). With electron-donating groups on the aryl isocyanide the reactivity is more diverse, and three outcomes are possible. In two cases, the isocyanide and azide undergo a [3 + 2] cycloaddition to form a C-bound tetrazolato structure (3). In three other cases, 2 equiv of azide are involved in the formation of a previously unobserved structure, where a tetrazolato and aryl cyanamido couple and rearrange to form a chelating ligand comprised of an N-bound tetrazolato and an acyclic diaminocarbene (4). Finally, a bimetallic aryl cyanamido complex (5) is isolated in one case. All compounds are luminescent, some with exceptional photoluminescence quantum yields as high as 0.81 in solution for sky-blue emission, and 0.87 for yellow emission and 0.65 for orange-red emission in polymer films.
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Affiliation(s)
- Chenggang Jiang
- Department of Chemistry, University of Houston, 3585 Cullen Blvd. Room 112, Houston, Texas 77204-5003, United States
| | - Louise M Cañada
- Department of Chemistry, University of Houston, 3585 Cullen Blvd. Room 112, Houston, Texas 77204-5003, United States
| | - Ngoc Bao Nguyen
- Department of Chemistry, University of Houston, 3585 Cullen Blvd. Room 112, Houston, Texas 77204-5003, United States
| | - Michael D S Halamicek
- Department of Chemistry, University of Houston, 3585 Cullen Blvd. Room 112, Houston, Texas 77204-5003, United States
| | - Sami H Nguyen
- Department of Chemistry, University of Houston, 3585 Cullen Blvd. Room 112, Houston, Texas 77204-5003, United States
| | - Thomas S Teets
- Department of Chemistry, University of Houston, 3585 Cullen Blvd. Room 112, Houston, Texas 77204-5003, United States
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3
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Olumba ME, O’Donnell RM, Rohrabaugh TN, Teets TS. Panchromatic Excited-State Absorption in Bis-Cyclometalated Iridium Isocyanide Complexes. Inorg Chem 2022; 61:19344-19353. [DOI: 10.1021/acs.inorgchem.2c03136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Morris E. Olumba
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Room 112, Houston, Texas77204-5003, United States
| | - Ryan M. O’Donnell
- U.S. Army Combat Capabilities Development Command, Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland20783, United States
| | - Thomas N. Rohrabaugh
- U.S. Army Combat Capabilities Development Command, Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland20783, United States
| | - Thomas S. Teets
- Department of Chemistry, University of Houston, 3585 Cullen Blvd., Room 112, Houston, Texas77204-5003, United States
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4
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Echevarría I, Vaquero M, Manzano BR, Jalón FA, Quesada R, Espino G. Photocatalytic Aerobic Dehydrogenation of N-Heterocycles with Ir(III) Photosensitizers Bearing the 2(2'-Pyridyl)benzimidazole Scaffold. Inorg Chem 2022; 61:6193-6208. [PMID: 35394766 PMCID: PMC9044454 DOI: 10.1021/acs.inorgchem.2c00358] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Photoredox catalysis constitutes a very powerful tool in organic synthesis, due to its versatility, efficiency, and the mild conditions required by photoinduced transformations. In this paper, we present an efficient and selective photocatalytic procedure for the aerobic oxidative dehydrogenation of partially saturated N-heterocycles to afford the respective N-heteroarenes (indoles, quinolines, acridines, and quinoxalines). The protocol involves the use of new Ir(III) biscyclometalated photocatalysts of the general formula [Ir(C^N)2(N^N')]Cl, where the C^N ligand is 2-(2,4-difluorophenyl)pyridinate, and N^N' are different ligands based on the 2-(2'-pyridyl)benzimidazole scaffold. In-depth electrochemical and photophysical studies as well as DFT calculations have allowed us to establish structure-activity relationships, which provide insights for the rational design of efficient metal-based dyes in photocatalytic oxidation reactions. In addition, we have formulated a dual mechanism, mediated by the radical anion superoxide, for the above-mentioned transformations.
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Affiliation(s)
- Igor Echevarría
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Mónica Vaquero
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Blanca R Manzano
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Avda. Camilo J. Cela 10, 13071 Ciudad Real, Spain
| | - Félix A Jalón
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Avda. Camilo J. Cela 10, 13071 Ciudad Real, Spain
| | - Roberto Quesada
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Gustavo Espino
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
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5
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Kinzhalov MA, Luzyanin KV. Synthesis and Contemporary Applications of Platinum Group Metals Complexes with Acyclic Diaminocarbene Ligands (Review). RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622010065] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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6
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Sutton GD, Olumba ME, Nguyen YH, Teets TS. The diverse functions of isocyanides in phosphorescent metal complexes. Dalton Trans 2021; 50:17851-17863. [PMID: 34787613 DOI: 10.1039/d1dt03312c] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this Perspective, we highlight many examples of photoluminescent metal complexes supported by isocyanides, with an emphasis on recent developments including several from our own group. Work in this field has shown that the isocyanide can play important structural roles, both as a terminal ligand and as a bridging ligand for polynuclear structures, and can influence the excited-state character and excited-state dynamics. In addition, there are many examples of isocyanide-supported complexes where the isocyanide serves as a chromophoric ligand, meaning the low-energy excited states that are important in the photochemistry are partially or completely localized on the isocyanide. Finally, an emerging trend in the design of luminescent compounds is to use the isocyanide as an electrophilic precursor, converted to an acyclic carbene by nucleophilic addition which imparts certain photophysical advantages. This Perspective aims to show the diverse roles played by isocyanides in the design of luminescent compounds, showcasing the recent developments that have led to a substantial growth in fundamental knowledge, function, and applications related to photoluminescence.
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Affiliation(s)
- Gregory D Sutton
- University of Houston, Department of Chemistry, 3585 Cullen Blvd., Room 112, Houston, TX 77204-5003, USA.
| | - Morris E Olumba
- University of Houston, Department of Chemistry, 3585 Cullen Blvd., Room 112, Houston, TX 77204-5003, USA.
| | - Yennie H Nguyen
- University of Houston, Department of Chemistry, 3585 Cullen Blvd., Room 112, Houston, TX 77204-5003, USA.
| | - Thomas S Teets
- University of Houston, Department of Chemistry, 3585 Cullen Blvd., Room 112, Houston, TX 77204-5003, USA.
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7
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Ilic S, Cairnie DR, Bridgewater CM, Morris AJ. Investigation into dual emission of a cyclometalated iridium complex: The role of ion-pairing. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2021. [DOI: 10.1016/j.jpap.2021.100084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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8
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Cañada LM, Kölling J, Wen Z, Wu JIC, Teets TS. Cyano-Isocyanide Iridium(III) Complexes with Pure Blue Phosphorescence. Inorg Chem 2021; 60:6391-6402. [PMID: 33844525 DOI: 10.1021/acs.inorgchem.1c00103] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
In this paper, we report a series of six neutral, blue-phosphorescent cyclometalated iridium complexes of the type Ir(C^Y)2(CNAr)(CN). The cyclometalating ligands in these compounds (C^Y) are either aryl-substituted 1,2,4-triazole or NHC ligands, known to produce complexes with blue phosphorescence. These cyclometalating ligands are paired with π-acidic, strongly σ-donating cyano and aryl isocyanide (CNAr) ancillary ligands, the hypothesis being that these ancillary ligands would destabilize the higher-lying ligand-field (d-d) excited states, allowing efficient blue photoluminescence. The compounds are prepared by substituting the cyanide ancillary ligand onto a chloride precursor and are characterized by NMR, mass spectrometry, infrared spectroscopy, and, for five of the compounds, by X-ray crystallography. Cyclic voltammetry establishes that these compounds have large HOMO-LUMO gaps. The mixed cyano-isocyanide compounds are weakly luminescent in solution, but they phosphoresce with moderate to good efficiency when doped into poly(methyl methacrylate) films, with Commission Internationale de L'Eclairage coordinates that indicate deep blue emission for five of the six compounds. The photophysical studies show that the photoluminescence quantum yields are greatly enhanced in the cyano complexes relative to the chloride precursors, affirming the benefit of strong-field ancillary ligands in the design of blue-phosphorescent complexes. Density functional theory calculations confirm that this enhancement arises from a significant destabilization of the higher-energy ligand-field states in the cyanide complexes relative to the chloride precursors.
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Affiliation(s)
- Louise M Cañada
- Department of Chemistry, University of Houston, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
| | - Johanna Kölling
- Department of Chemistry, University of Houston, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
| | - Zhili Wen
- Department of Chemistry, University of Houston, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
| | - Judy I-Chia Wu
- Department of Chemistry, University of Houston, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
| | - Thomas S Teets
- Department of Chemistry, University of Houston, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
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9
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Olumba ME, Na H, Friedman AE, Teets TS. Coordination-Driven Self-Assembly of Cyclometalated Iridium Squares Using Linear Aromatic Diisocyanides. Inorg Chem 2021; 60:5898-5907. [PMID: 33784459 DOI: 10.1021/acs.inorgchem.1c00312] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Here, we demonstrate facile [4 + 4] coordination-driven self-assembly of cyclometalated iridium(III) using linear aryldiisocyanide bridging ligands (BLs). A family of nine new [Ir(C^N)2(μ-BL)]44+ coordination cages is described, where C^N is the cyclometalating ligand-2-phenylpyridine (ppy), 2-phenylbenzothiazole (bt), or 1-phenylisoquinoline (piq)-and BL is the diisocyanide BL, with varying spacer lengths between the isocyanide binding sites. These supramolecular coordination compounds are prepared via a one-pot synthesis, with isolated yields of 40-83%. 1H NMR spectroscopy confirms the selective isolation of a single product, which is affirmed to be the M4L4 square by high-resolution mass spectrometry. Detailed photophysical studies were carried out to reveal the nature of the luminescent triplet states in these complexes. In most cases, phosphorescence arises from the [Ir(C^N)2]+ nodes, with the emission color determined by the cyclometalating ligand. However, in two cases, the lowest-energy triplet state resides on the aromatic core of the BL, and weak phosphorescence from that state is observed. This work shows that aromatic diisocyanide ligands enable coordination-driven assembly of inert iridium(III) nodes under mild conditions, producing supramolecular coordination complexes with desirable photophysical properties.
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Affiliation(s)
- Morris E Olumba
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| | - Hanah Na
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| | - Alan E Friedman
- Department of Materials, Design, and Innovation, University at Buffalo, The State University of New York, Buffalo, New York 14260, United States
| | - Thomas S Teets
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
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10
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Favale JM, Hauke CE, Danilov EO, Yarnell JE, Castellano FN. Ligand-triplet migration in iridium(iii) cyclometalates featuring π-conjugated isocyanide ligands. Dalton Trans 2020; 49:9995-10002. [PMID: 32643713 DOI: 10.1039/d0dt02100h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The manipulation of the triplet excited state manifold leads to large differences in the photophysical properties within a given class of metal-organic chromophores. By the appropriate choice of ancillary ligand, large changes can be made both to the order and nature of the lowest excited states and therefore to the resulting photophysical properties. Herein, a series of four bis-2-phenylpyridine (ppy) cyclometalated Ir(iii) compounds bearing two arylisocyanide ligands were synthesized and photophysically characterized to understand the effects of using ancillary ligands featuring systematic changes in π-conjugation. By varying the arylisocyanide ligands, the photoluminescence quantum yield ranged from 5% to 49% and the excited state lifetime ranged between 24 μs and 2 ms. These variations in photophysical response are consistent with lowering the triplet ligand-centered (3LC) state of the arylisocyanide ligand as the π system was extended, confirmed by 77 K photoluminescence emission spectra and ultrafast transient absorption experiments. The latter analysis gleaned detailed insight into the importance of the interplay of the 3LC state of the phenylpyridine and arylisocyanide ligands in these polychromophic Ir(iii) molecules.
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Affiliation(s)
- Joseph M Favale
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA.
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11
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Blue-phosphorescent bis-cyclometalated iridium complexes with aryl isocyanide ancillary ligands. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114332] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Eremina AA, Kinzhalov MA, Katlenok EA, Smirnov AS, Andrusenko EV, Pidko EA, Suslonov VV, Luzyanin KV. Phosphorescent Iridium(III) Complexes with Acyclic Diaminocarbene Ligands as Chemosensors for Mercury. Inorg Chem 2020; 59:2209-2222. [DOI: 10.1021/acs.inorgchem.9b02833] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Anzhelika A. Eremina
- Saint Petersburg State University, 7/9 Universitetskaya Nab., St. Petersburg 199034, Russian Federation
| | - Mikhail A. Kinzhalov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., St. Petersburg 199034, Russian Federation
| | - Evgene A. Katlenok
- Saint Petersburg State University, 7/9 Universitetskaya Nab., St. Petersburg 199034, Russian Federation
| | - Andrey S. Smirnov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., St. Petersburg 199034, Russian Federation
| | - Elena V. Andrusenko
- TheoMAT Group, ITMO University, Lomonosova 9, St. Petersburg 191002, Russian Federation
| | - Evgeny A. Pidko
- TheoMAT Group, ITMO University, Lomonosova 9, St. Petersburg 191002, Russian Federation
- Inorganic Systems Engineering Group, Department of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Vitalii V. Suslonov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., St. Petersburg 199034, Russian Federation
| | - Konstantin V. Luzyanin
- Saint Petersburg State University, 7/9 Universitetskaya Nab., St. Petersburg 199034, Russian Federation
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom
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13
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Yan X, Zhang H, Cai W, Zhao A, Wang J, Shen W. Effects of intramolecular hydrogen bonds on phosphorescence emission: A theoretical perspective. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5527] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xi Yan
- School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Huize Zhang
- School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Wanlin Cai
- School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Ancong Zhao
- School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Jian Wang
- School of Elementary Education, Chongqing Normal University Chongqing 400715 China
| | - Wei Shen
- School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
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14
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Favale JM, Danilov EO, Yarnell JE, Castellano FN. Photophysical Processes in Rhenium(I) Diiminetricarbonyl Arylisocyanides Featuring Three Interacting Triplet Excited States. Inorg Chem 2019; 58:8750-8762. [DOI: 10.1021/acs.inorgchem.9b01155] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Joseph M. Favale
- Department of Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695-8204, United States
| | - Evgeny O. Danilov
- Department of Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695-8204, United States
| | - James E. Yarnell
- Department of Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695-8204, United States
| | - Felix N. Castellano
- Department of Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695-8204, United States
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15
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Choung KS, Marroquin K, Teets TS. Cyclometalated iridium-BODIPY ratiometric O 2 sensors. Chem Sci 2019; 10:5124-5132. [PMID: 31183064 PMCID: PMC6524664 DOI: 10.1039/c9sc00696f] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 04/12/2019] [Indexed: 01/05/2023] Open
Abstract
Here we introduce a new class of ratiometric O2 sensors for hypoxic environments. Two-component structures composed of phosphorescent cyclometalated Ir(iii) complexes and the well-known organic fluorophore BODIPY have been prepared by the 1 : 1 reaction of bis-cyclometalated iridium synthons with pyridyl-substituted BODIPY compounds. Two different cyclometalating ligands are used, which determine the relative energies of the iridium-centered and BODIPY-centered excited states, and the nature of the linker between iridium and BODIPY also has a small influence on the photoluminescence. Some of the conjugates exhibit dual emission, with significant phosphorescence from the iridium site and fluorescence from the BODIPY, and thus function as ratiometric oxygen sensors. Oxygen quenching experiments demonstrate that as O2 is added the phosphorescence is quenched while the fluorescence is unaffected, with dynamic ranges that are well suited for hypoxic sensing (pO2 < 160 mmHg).
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Affiliation(s)
- Ku Sun Choung
- University of Houston , Department of Chemistry , 3585 Cullen Blvd., Room 112 , Houston , TX 77204-5003 , USA .
| | - Karen Marroquin
- University of Houston , Department of Chemistry , 3585 Cullen Blvd., Room 112 , Houston , TX 77204-5003 , USA .
| | - Thomas S Teets
- University of Houston , Department of Chemistry , 3585 Cullen Blvd., Room 112 , Houston , TX 77204-5003 , USA .
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16
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Na H, Song M, Teets TS. Facile Synthesis of Luminescent Ir–Pt–Ir Trimetallic Complexes. Chemistry 2019; 25:4833-4842. [DOI: 10.1002/chem.201900167] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Indexed: 01/25/2023]
Affiliation(s)
- Hanah Na
- Department of ChemistryUniversity of Houston 3585 Cullen Blvd., Room 112 Houston TX 77204-5003 USA
| | - Mina Song
- Department of ChemistryUniversity of Houston 3585 Cullen Blvd., Room 112 Houston TX 77204-5003 USA
| | - Thomas S. Teets
- Department of ChemistryUniversity of Houston 3585 Cullen Blvd., Room 112 Houston TX 77204-5003 USA
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17
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Kinzhalov MA, Eremina AA, Smirnov AS, Suslonov VV, Kukushkin VY, Luzyanin KV. Cleavage of acyclic diaminocarbene ligands at an iridium(iii) center. Recognition of a new reactivity mode for carbene ligands. Dalton Trans 2019; 48:7571-7582. [DOI: 10.1039/c9dt01138b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new reactivity mode for acyclic diaminocarbene ligands, viz. competitive cleavage of either C–NH2 or C–NHR bonds in the aminocarbene fragment, is recognized.
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Affiliation(s)
| | | | | | | | | | - Konstantin V. Luzyanin
- Saint Petersburg State University
- Saint Petersburg
- Russian Federation
- Department of Chemistry
- University of Liverpool
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18
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Sebata S, Takizawa SY, Ikuta N, Murata S. Photofunctions of iridium(iii) complexes in vesicles: long-lived excited states and visible-light sensitization for hydrogen evolution in aqueous solution. Dalton Trans 2019; 48:14914-14925. [DOI: 10.1039/c9dt03144h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Utilization of DPPC vesicles allows water-insoluble photoactive Ir(iii) complexes to be dispersed in bulk aqueous solution.
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Affiliation(s)
- Shinogu Sebata
- Department of Basic Science
- Graduate School of Arts and Sciences
- The University of Tokyo
- Tokyo 153-8902
- Japan
| | - Shin-ya Takizawa
- Department of Basic Science
- Graduate School of Arts and Sciences
- The University of Tokyo
- Tokyo 153-8902
- Japan
| | - Naoya Ikuta
- Department of Basic Science
- Graduate School of Arts and Sciences
- The University of Tokyo
- Tokyo 153-8902
- Japan
| | - Shigeru Murata
- Department of Basic Science
- Graduate School of Arts and Sciences
- The University of Tokyo
- Tokyo 153-8902
- Japan
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19
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Deaton JC, Taliaferro CM, Pitman CL, Czerwieniec R, Jakubikova E, Miller AJM, Castellano FN. Excited-State Switching between Ligand-Centered and Charge Transfer Modulated by Metal-Carbon Bonds in Cyclopentadienyl Iridium Complexes. Inorg Chem 2018; 57:15445-15461. [PMID: 30516977 DOI: 10.1021/acs.inorgchem.8b02753] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Three series of pentamethylcyclopentadienyl (Cp*) Ir(III) complexes with different bidentate ligands were synthesized and structurally characterized, [Cp*Ir(tpy)L] n+ (tpy = 2-tolylpyridinato; n = 0 or 1), [Cp*Ir(piq)L] n+ (piq = 1-phenylisoquinolinato; n = 0 or 1), and [Cp*Ir(bpy)L] m+ (bpy = 2,2'-bipyridine; m = 1 or 2), featuring a range of monodentate carbon-donor ligands within each series [L = 2,6-dimethylphenylisocyanide; 3,5-dimethylimidazol-2-ylidene (NHC); methyl)]. The spectroscopic and photophysical properties of these molecules and those of the photocatalyst [Cp*Ir(bpy)H]+ were examined to establish electronic structure-photophysical property relationships that engender productive photochemical reactivity of this hydride and its methyl analogue. The Ir(III) chromophores containing ancillary CNAr ligands exhibited features anticipated for predominantly ligand-centered (LC) excited states, and analogues bearing the NHC ancillary exhibited properties consistent with LC excited states containing a small admixture of metal-to-ligand charge-transfer (MLCT) character. However, the molecules featuring anionic and strongly σ-donating methyl or hydride ligands exhibited photophysical properties consistent with a high degree of CT character. Density functional theory calculations suggest that the lowest energy triplet states in these complexes are composed of a mixture of MLCT and ligand-to-ligand CT originating from both the Cp* and methyl or hydride ancillary ligands. The high degree of CT character in the triplet excited states of methyliridium complexes bearing C^N-cyclometalated ligands offer a striking contrast to the photophysical properties of pseudo-octahedral structures fac-Ir(C^N)3 or Ir(C^N)2(acac) that have lowest-energy triplet excited states characterized as primarily LC character with a more moderate MLCT admixture.
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Affiliation(s)
- Joseph C Deaton
- Department of Chemistry , North Carolina State University , Raleigh , North Carolina 27695-8204 , United States
| | - Chelsea M Taliaferro
- Department of Chemistry , North Carolina State University , Raleigh , North Carolina 27695-8204 , United States
| | - Catherine L Pitman
- Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599-3290 , United States
| | - Rafał Czerwieniec
- Institut für Physikalische und Theoretische Chemie , Universität Regensburg , Universitätstrasse 31 , D-93040 Regensburg , Germany
| | - Elena Jakubikova
- Department of Chemistry , North Carolina State University , Raleigh , North Carolina 27695-8204 , United States
| | - Alexander J M Miller
- Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599-3290 , United States
| | - Felix N Castellano
- Department of Chemistry , North Carolina State University , Raleigh , North Carolina 27695-8204 , United States
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20
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Martínez-Alonso M, Busto N, Aguirre LD, Berlanga L, Carrión MC, Cuevas JV, Rodríguez AM, Carbayo A, Manzano BR, Ortí E, Jalón FA, García B, Espino G. Strong Influence of the Ancillary Ligand over the Photodynamic Anticancer Properties of Neutral Biscyclometalated Ir III Complexes Bearing 2-Benzoazole-Phenolates. Chemistry 2018; 24:17523-17537. [PMID: 30176086 DOI: 10.1002/chem.201803784] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Indexed: 12/12/2022]
Abstract
In this paper, the synthesis, comprehensive characterization and biological and photocatalytic properties of two series of neutral IrIII biscyclometalated complexes of general formula [Ir(C^N)2 (N^O)], where the N^O ligands are 2-(benzimidazolyl)phenolate-N,O (L1, series a) and 2-(benzothiazolyl)phenolate-N,O (L2, series b), and the C^N ligands are 2-(phenyl)pyridinate or its derivatives, are described,. Complexes of types a and b exhibit dissimilar photophysical and biological properties. In vitro cytotoxicity tests conclusively prove that derivatives of series a are harmless in the dark against SW480 cancer cells (colon adenocarcinoma), but express enhanced cytotoxicity versus the same cells after stimulation with UV or blue light. In contrast, complexes of type b show a very high cytotoxic activity in the dark, but low photosensitizing ability. Thus, the ancillary N^O ligand is the main factor in terms of cytotoxic activity both in the dark and upon irradiation. However, the C^N ligands play a key role regarding cellular uptake. In particular, the complex of formula [Ir(dfppy)2 (L1)] (dfppy=2-(4,6-difluorophenyl)pyridinate) [3 a] has been identified as both an efficient photosensitizer for 1 O2 generation and a potential agent for photodynamic therapy. These capabilities are probably related to a combination of its notable cellular internalization, remarkable photostability, high photoluminescence quantum yield, and long triplet excited-state lifetime. Both types of complexes exhibit notable catalytic activity in the photooxidation of thioanisole and S-containing aminoacids with full selectivity.
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Affiliation(s)
- Marta Martínez-Alonso
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Natalia Busto
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Larry Danilo Aguirre
- Facultad de Ingeniería EléctricayElectrónica, Universidad Nacional de Ingeniería, Av. Túpac Amaru 210, PE-LIMA, 025, Lima, Perú
| | - Leticia Berlanga
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - M Carmen Carrión
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Universidad de Castilla-La Mancha, Avda. Camilo J. Cela 10, 13071, Ciudad Real, Spain
| | - José V Cuevas
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Ana M Rodríguez
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Universidad de Castilla-La Mancha, Avda. Camilo J. Cela 10, 13071, Ciudad Real, Spain
| | - Arancha Carbayo
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Blanca R Manzano
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Universidad de Castilla-La Mancha, Avda. Camilo J. Cela 10, 13071, Ciudad Real, Spain
| | - Enrique Ortí
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Félix A Jalón
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Universidad de Castilla-La Mancha, Avda. Camilo J. Cela 10, 13071, Ciudad Real, Spain
| | - Begoña García
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Gustavo Espino
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
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21
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Na H, Lai P, Cañada LM, Teets TS. Photoluminescence of Cyclometalated Iridium Complexes in Poly(methyl methacrylate) Films. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00446] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hanah Na
- Department of Chemistry, University of Houston, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
| | - Po−Ni Lai
- Department of Chemistry, University of Houston, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
| | - Louise M. Cañada
- Department of Chemistry, University of Houston, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
| | - Thomas S. Teets
- Department of Chemistry, University of Houston, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
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22
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Thiabendazole-based Rh(III) and Ir(III) biscyclometallated complexes with mitochondria-targeted anticancer activity and metal-sensitive photodynamic activity. Eur J Med Chem 2018; 157:279-293. [DOI: 10.1016/j.ejmech.2018.07.065] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 07/26/2018] [Accepted: 07/28/2018] [Indexed: 11/20/2022]
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23
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Castellano FN. Editorial for the ACS Select Virtual Issue on Emerging Investigators in Inorganic Photochemistry and Photophysics. Inorg Chem 2018; 55:12483-12487. [PMID: 27989181 DOI: 10.1021/acs.inorgchem.6b02830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Felix N Castellano
- Department of Chemistry, North Carolina State University , Raleigh, North Carolina 27695-8204, United States
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24
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Vaquero M, Ruiz-Riaguas A, Martínez-Alonso M, Jalón FA, Manzano BR, Rodríguez AM, García-Herbosa G, Carbayo A, García B, Espino G. Selective Photooxidation of Sulfides Catalyzed by Bis-cyclometalated IrIII
Photosensitizers Bearing 2,2′-Dipyridylamine-Based Ligands. Chemistry 2018; 24:10662-10671. [DOI: 10.1002/chem.201801173] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/16/2018] [Indexed: 01/10/2023]
Affiliation(s)
- Mónica Vaquero
- Departamento de Química; Facultad de Ciencias; Universidad de Burgos; Plaza Misael Bañuelos s/n 09001 Burgos Spain
| | - Alba Ruiz-Riaguas
- Departamento de Química; Facultad de Ciencias; Universidad de Burgos; Plaza Misael Bañuelos s/n 09001 Burgos Spain
| | - Marta Martínez-Alonso
- Departamento de Química; Facultad de Ciencias; Universidad de Burgos; Plaza Misael Bañuelos s/n 09001 Burgos Spain
| | - Félix A. Jalón
- Departamento de Química Inorgánica, Orgánica y Bioquímica; Facultad de Químicas; Universidad de Castilla-La Mancha; Avda. Camilo J. Cela 10 13071 Ciudad Real Spain
| | - Blanca R. Manzano
- Departamento de Química Inorgánica, Orgánica y Bioquímica; Facultad de Químicas; Universidad de Castilla-La Mancha; Avda. Camilo J. Cela 10 13071 Ciudad Real Spain
| | - Ana M. Rodríguez
- Departamento de Química Inorgánica, Orgánica y Bioquímica; Facultad de Químicas; Universidad de Castilla-La Mancha; Avda. Camilo J. Cela 10 13071 Ciudad Real Spain
| | - Gabriel García-Herbosa
- Departamento de Química; Facultad de Ciencias; Universidad de Burgos; Plaza Misael Bañuelos s/n 09001 Burgos Spain
| | - Arancha Carbayo
- Departamento de Química; Facultad de Ciencias; Universidad de Burgos; Plaza Misael Bañuelos s/n 09001 Burgos Spain
| | - Begoña García
- Departamento de Química; Facultad de Ciencias; Universidad de Burgos; Plaza Misael Bañuelos s/n 09001 Burgos Spain
| | - Gustavo Espino
- Departamento de Química; Facultad de Ciencias; Universidad de Burgos; Plaza Misael Bañuelos s/n 09001 Burgos Spain
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25
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Kinzhalov MA, Popova EA, Petrov ML, Khoroshilova OV, Mahmudov KT, Pombeiro AJ. Pnicogen and chalcogen bonds in cyclometalated iridium(III) complexes. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.02.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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26
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Kinzhalov MA, Eremina AA, Ivanov DM, Novikov AS, Katlenok EA, Balashev KP, Suslonov VV. Halogen and chalcogen bonding in dichloromethane solvate of cyclometalated iridium(III) isocyanide complex. Z KRIST-CRYST MATER 2017. [DOI: 10.1515/zkri-2017-2065] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
AbstractSolvent-rich dichloromethane solvate of
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27
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Li LP, Ye BH. Discrimination and Enantiomeric Excess Determination of Chiral Primary Amines Based on a Chiral-at-Metal Ir(III) Complex Using NMR Spectroscopy. Inorg Chem 2017; 56:10717-10723. [DOI: 10.1021/acs.inorgchem.7b01681] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Li-Ping Li
- MOE Key Laboratory of Bioinorganic and
Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Bao-Hui Ye
- MOE Key Laboratory of Bioinorganic and
Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
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28
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Na H, Maity A, Morshed R, Teets TS. Bis-Cyclometalated Iridium Complexes with Chelating Dicarbene Ancillary Ligands. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00428] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Hanah Na
- University of Houston, Department of Chemistry, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
| | - Ayan Maity
- University of Houston, Department of Chemistry, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
| | - Rakib Morshed
- University of Houston, Department of Chemistry, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
| | - Thomas S. Teets
- University of Houston, Department of Chemistry, 3585 Cullen Boulevard, Room 112, Houston, Texas 77204-5003, United States
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29
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Wang X, Yang H, Wen Y, Wang L, Li J, Zhang J. Comprehension of the Effect of a Hydroxyl Group in Ancillary Ligand on Phosphorescent Property for Heteroleptic Ir(III) Complexes: A Computational Study Using Quantitative Prediction. Inorg Chem 2017; 56:8986-8995. [PMID: 28708408 DOI: 10.1021/acs.inorgchem.7b00946] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new Ir(III) complex (dfpypya)2Ir(pic-OH) (2) is theoretically designed by introduction of a simple hydroxyl group into the ancillary ligand on the basis of (dfpypya)2Ir(pic) (1) with the aim to get the high-efficiency and stable blue-emitting phosphors, where dfpypya is 3-methyl-6-(2',4'-difluoro-pyridinato)pyridazine, pic is picolinate, and pic-OH is 3-hydroxypicolinic acid. The other configuration (dfpypya)2Ir(pic-OH)' (3) is also investigated to compare with 2. The difference between 2 and 3 is whether the intramolecular hydrogen bond is formed in the (dfpypya)2Ir(pic-OH). The quantum yield is determined by three different methods including the semiquantitative and quantitative methods. To quantitatively determine the quantum yield is still not an easy task to be completed. This work would provide some useful advices to select the suitable method to reliably evaluate the quantum yield. Complex 2 has larger quantum yield and more stability as compared with 1 and 3. The formation of intramolecular hydrogen bond would become a new method to design new phosphor with the desired properties.
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Affiliation(s)
| | | | | | - Li Wang
- College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan 475004, P. R. China
| | - Junfeng Li
- Division of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology , SE-106 91 Stockholm, Sweden
| | - Jinglai Zhang
- College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan 475004, P. R. China
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30
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Islamova RM, Dobrynin MV, Vlasov AV, Eremina AA, Kinzhalov MA, Kolesnikov IE, Zolotarev AA, Masloborodova EA, Luzyanin KV. Iridium(iii)-catalysed cross-linking of polysiloxanes leading to the thermally resistant luminescent silicone rubbers. Catal Sci Technol 2017. [DOI: 10.1039/c7cy02013a] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iridium(iii) cross-linking catalysts for silicones show a unique temperature-curing profile and lead to thermally resistant and luminescent silicone rubbers.
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Affiliation(s)
- Regina M. Islamova
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Mikhail V. Dobrynin
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Andrey V. Vlasov
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Anzhelika A. Eremina
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Mikhail A. Kinzhalov
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Ilya E. Kolesnikov
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | - Andrey A. Zolotarev
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
| | | | - Konstantin V. Luzyanin
- Saint Petersburg State University, 7/9
- Universitetskaya nab
- Saint Petersburg
- 199034 Russia
- Department of Chemistry
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31
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Maity A, Kölsch JC, Na H, Teets TS. Room temperature transmetallation from tris(pentafluorophenyl)borane to cyclometallated iridium(iii). Dalton Trans 2017; 46:11757-11767. [DOI: 10.1039/c7dt02540h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transmetallation with tris(pentafluorophenyl)borane produces bis-cyclometallated iridium complexes with a perfluorophenyl ancillary ligand.
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Affiliation(s)
- Ayan Maity
- Department of Chemistry
- University of Houston
- Houston
- USA
| | | | - Hanah Na
- Department of Chemistry
- University of Houston
- Houston
- USA
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32
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Na H, Maity A, Teets TS. Bis-cyclometalated iridium complexes with electronically modified aryl isocyanide ancillary ligands. Dalton Trans 2017; 46:5008-5016. [DOI: 10.1039/c7dt00694b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Bis-cyclometalated iridium complexes with electronically modified aryl isocyanide ligands are described, and the effects on the photophysical properties are noted.
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Affiliation(s)
- Hanah Na
- Department of Chemistry
- University of Houston
- Houston
- USA
| | - Ayan Maity
- Department of Chemistry
- University of Houston
- Houston
- USA
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33
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Urinda S, Das G, Pramanik A, Sarkar P. Quantum chemical investigation on the Ir(iii) complexes with an isomeric triazine-based imidazolium carbene ligand for efficient blue OLEDs. Phys Chem Chem Phys 2017; 19:29629-29640. [DOI: 10.1039/c7cp03299d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ir(iii) complexes of isomeric triazine-based imidazolium carbene with phenylpyridine or bipyridine as an ancillary ligand show blue phosphorescence with high quantum efficiency.
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Affiliation(s)
- Sharmistha Urinda
- Department of Chemistry
- Visva-Bharati University
- Santiniketan-731235
- India
| | - Goutam Das
- G.S.S.S.T
- Indian Institute of Technology
- Kharagpur
- India
| | - Anup Pramanik
- Department of Chemistry
- Visva-Bharati University
- Santiniketan-731235
- India
| | - Pranab Sarkar
- Department of Chemistry
- Visva-Bharati University
- Santiniketan-731235
- India
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34
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Shahsavari HR, Babadi Aghakhanpour R, Hossein-Abadi M, Golbon Haghighi M, Notash B, Fereidoonnezhad M. A new approach to the effects of isocyanide (CN-R) ligands on the luminescence properties of cycloplatinated(ii) complexes. NEW J CHEM 2017. [DOI: 10.1039/c7nj03110f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cycloplatinated complexes bearing isocyanides were prepared and characterized. The complexes exhibited strong luminescence while the nature of R substituents in isocyanides affected the luminescence characteristics.
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Affiliation(s)
- Hamid R. Shahsavari
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Reza Babadi Aghakhanpour
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Mojdeh Hossein-Abadi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | | | - Behrouz Notash
- Department of Chemistry
- Shahid Beheshti University
- Tehran 19839-69411
- Iran
| | - Masood Fereidoonnezhad
- Department of Medicinal Chemistry
- School of Pharmacy; Cancer
- Environmental and Petroleum Pollutants Research Center
- Ahvaz Jundishapur University of Medical Sciences
- Ahvaz
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35
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Axtell JC, Kirlikovali KO, Djurovich PI, Jung D, Nguyen VT, Munekiyo B, Royappa AT, Rheingold AL, Spokoyny AM. Blue Phosphorescent Zwitterionic Iridium(III) Complexes Featuring Weakly Coordinating nido-Carborane-Based Ligands. J Am Chem Soc 2016; 138:15758-15765. [PMID: 27934013 DOI: 10.1021/jacs.6b10232] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We report the development of a new class of phosphorescent zwitterionic bis(heteroleptic) Ir(III) compounds containing pyridyl ligands with weakly coordinating nido-carboranyl substituents. Treatment of phenylpyridine-based Ir(III) precursors with C-substituted ortho-carboranylpyridines in 2-ethoxyethanol results in a facile carborane deboronation and the formation of robust and highly luminescent metal complexes. The resulting nido-carboranyl fragments associate with the cationic Ir(III) center through primarily electrostatic interactions. These compounds phosphoresce at blue wavelengths (450-470 nm) both in a poly(methyl methacrylate) (PMMA) matrix and in solution at 77 K. These complexes display structural stability at temperatures beyond 300 °C and quantum yields greater than 40%. Importantly, the observed quantum yields correspond to a dramatic 10-fold enhancement over the previously reported Ir(III) congeners featuring carboranyl-containing ligands in which the boron cluster is covalently attached to the metal. Ultimately, this work suggests that the use of a ligand framework containing a weakly coordinating anionic component can provide a new avenue for designing efficient Ir(III)-based phosphorescent emitters.
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Affiliation(s)
- Jonathan C Axtell
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Kent O Kirlikovali
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Peter I Djurovich
- Department of Chemistry, University of Southern California , Los Angeles, California 90089, United States
| | - Dahee Jung
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Vinh T Nguyen
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Brian Munekiyo
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - A Timothy Royappa
- Department of Chemistry, University of California, San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States.,Department of Chemistry, University of West Florida , 11000 University Parkway, Pensacola, Florida 32514, United States
| | - Arnold L Rheingold
- Department of Chemistry, University of California, San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Alexander M Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States.,California NanoSystems Institute (CNSI), University of California, Los Angeles , 570 Westwood Plaza, Los Angeles, California 90095, United States
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Aghazada S, Huckaba AJ, Pertegas A, Babaei A, Grancini G, Zimmermann I, Bolink H, Nazeeruddin MK. Molecular Engineering of Iridium Blue Emitters Using Aryl N-Heterocyclic Carbene Ligands. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600971] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sadig Aghazada
- Group for Molecular Engineering of Functional Materials; Ecole Polytechnique Federale de Lausanne Valais Wallis; Rue de l'Indutrie 17 1950 Sion Valais Switzerland
| | - Aron J. Huckaba
- Group for Molecular Engineering of Functional Materials; Ecole Polytechnique Federale de Lausanne Valais Wallis; Rue de l'Indutrie 17 1950 Sion Valais Switzerland
| | - Antonio Pertegas
- Instituto de Ciencia Molecular; Universidad de Valencia; c/Catedrático J. Beltrán 2 46980 Paterna Spain
| | - Azin Babaei
- Instituto de Ciencia Molecular; Universidad de Valencia; c/Catedrático J. Beltrán 2 46980 Paterna Spain
| | - Giulia Grancini
- Instituto de Ciencia Molecular; Universidad de Valencia; c/Catedrático J. Beltrán 2 46980 Paterna Spain
| | - Iwan Zimmermann
- Group for Molecular Engineering of Functional Materials; Ecole Polytechnique Federale de Lausanne Valais Wallis; Rue de l'Indutrie 17 1950 Sion Valais Switzerland
| | - Henk Bolink
- Instituto de Ciencia Molecular; Universidad de Valencia; c/Catedrático J. Beltrán 2 46980 Paterna Spain
| | - Mohammad Khaja Nazeeruddin
- Group for Molecular Engineering of Functional Materials; Ecole Polytechnique Federale de Lausanne Valais Wallis; Rue de l'Indutrie 17 1950 Sion Valais Switzerland
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Huckaba AJ, Nazeeruddin MK. Strategies for Tuning Emission Energy in Phosphorescent Ir(III) Complexes. COMMENT INORG CHEM 2016. [DOI: 10.1080/02603594.2016.1207064] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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