1
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Li J, Wang YH, Han SD, Wen YX, Hu JX, Li JH, Yang GY. Photochromism and Photomagnetism in Two Ni(II) Complexes Based on a Photoactive 2,4,6-Tris-2-Pyridyl-1,3,5-Triazine Ligand. Inorg Chem 2024; 63:1142-1150. [PMID: 38175800 DOI: 10.1021/acs.inorgchem.3c03499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
It is still challenging to construct novel photochromic and photomagnetic materials in the field of molecular materials. Herein, the 2,4,6-tris-2-pyridyl-1,3,5-triazine (TPTz) molecule was found to display photochromic properties under room temperature light irradiation. Two mononuclear structures, [Ni(H2O)(TPTz)(C2O4)]·2H2O (1; C2O42- = oxalate) [Ni(H2O)(TPTz)(C2O4)]·0.5H2O (2), and one chain compound [Ni(TPTz)(H2-HEDP)]·2H2O (3; HEDP = hydroxyethylidene diphosphonate) were obtained by assembling TPTz with polydentate O-ligands (oxalate and phosphonate) and the paramagnetic Ni2+ ions. The electron-transfer (ET)-dominated photochromism was observable in 1 and 2 after light irradiation with the photogeneration of relatively stable radicals, and the resultant photochromism was demonstrated via UV-vis, photoluminescence, X-ray photoelectron spectra, electron paramagnetic resonance spectra, and molecular orbital calculations. Due to the denser stacking interactions between the adjacent organic molecules, 2 exhibited a faster photochromic rate than 1. Compared with 1 and 2, compound 3 did not show photochromic behavior, which was deciphered by the theoretical calculations for all of the compounds. Importantly, the magnetic couplings appeared between photogenerated radicals and paramagnetic Ni2+ ions, resulting in a scarcely photomagnetic phenomenon of 1 and 2 in the Ni-based electron transfer photochromic materials. This work enriches the available kind of ligands for the design of ET photochromic materials, putting forward a method to tune the electron transfer photochromic efficiency in the molecular materials.
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Affiliation(s)
- Jie Li
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong 266071, PR China
| | - Yu-Han Wang
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong 266071, PR China
| | - Song-De Han
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong 266071, PR China
| | - Yu-Xuan Wen
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong 266071, PR China
| | - Ji-Xiang Hu
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong 266071, PR China
| | - Jin-Hua Li
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong 266071, PR China
| | - Guo-Yu Yang
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong 266071, PR China
- MOE Key Laboratory of Cluster Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, PR China
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2
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Redrado M, Miñana M, Coogan MP, Concepción Gimeno M, Fernández‐Moreira V. Tunable Emissive Ir(III) Benzimidazole-quinoline Hybrids as Promising Theranostic Lead Compounds. ChemMedChem 2022; 17:e202200244. [PMID: 35767349 PMCID: PMC9796238 DOI: 10.1002/cmdc.202200244] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/28/2022] [Indexed: 01/01/2023]
Abstract
Bioactive and luminescent cyclometallated Ir(III) complexes [Ir(ppy)2 L1]Cl (1) and [Ir(ppy)2 L2]Cl (2) containing a benzimidazole derivative (L1/L2) as auxiliary mimic of a nucleotide have been synthesised. The emissive properties of both complexes are conditioned by the nature of L1 and L2, rendering an orange and a green emitter respectively. Both are highly emissive with quantum yield increasing in absence of oxygen up to 0.26 (1) and 0.36 (2), suggesting their phosphorescent character. Antiproliferative activity against lung cancer A549 cells increased up to 15 times upon irradiation conditions, reaching IC50 values in the nanomolar range (0.3±0.09 μM (1) and 0.26±0.14 μM (2)) and pointing them as good PSs candidates for photodynamic therapy via 1 O2 generation. Cellular biodistribution analysis by fluorescence microscopy suggest the lysosomes as the preferential accumulation organelle. Time-resolved studies showed a greatly increased cellular emission lifetime compared to the solution values, indicating binding to macromolecules or cellular structures and restriction of collision and vibrational quenching.
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Affiliation(s)
- Marta Redrado
- Departamento de Química InorgánicaInstituto de Síntesis Química y Catálisis Homogénea (ISQCH)CSIC-Universidad de ZaragozaPedro Cerbuna 1250009ZaragozaSpain
| | - Miriam Miñana
- Departamento de Química InorgánicaInstituto de Síntesis Química y Catálisis Homogénea (ISQCH)CSIC-Universidad de ZaragozaPedro Cerbuna 1250009ZaragozaSpain
| | | | - M. Concepción Gimeno
- Departamento de Química InorgánicaInstituto de Síntesis Química y Catálisis Homogénea (ISQCH)CSIC-Universidad de ZaragozaPedro Cerbuna 1250009ZaragozaSpain
| | - Vanesa Fernández‐Moreira
- Departamento de Química InorgánicaInstituto de Síntesis Química y Catálisis Homogénea (ISQCH)CSIC-Universidad de ZaragozaPedro Cerbuna 1250009ZaragozaSpain
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3
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Lu Y, Tsegaw YA, Wodyński A, Li L, Beckers H, Kaupp M, Riedel S. Investigation of Molecular Iridium Fluorides IrF
n
(
n
=1–6): A Combined Matrix‐Isolation and Quantum‐Chemical Study. Chemistry 2022; 28:e202104005. [PMID: 35181951 PMCID: PMC9310635 DOI: 10.1002/chem.202104005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Indexed: 12/03/2022]
Abstract
The photo‐initiated defluorination of iridium hexafluoride (IrF6) was investigated in neon and argon matrices at 6 K, and their photoproducts are characterized by IR and UV‐vis spectroscopies as well as quantum‐chemical calculations. The primary photoproducts obtained after irradiation with λ=365 nm are iridium pentafluoride (IrF5) and iridium trifluoride (IrF3), while longer irradiation of the same matrix with λ=278 nm produced iridium tetrafluoride (IrF4) and iridium difluoride (IrF2) by Ir−F bond cleavage or F2 elimination. In addition, IrF5 can be reversed to IrF6 by adding a F atom when exposed to blue‐light (λ=470 nm) irradiation. Laser irradiation (λ=266 nm) of IrF4 also generated IrF6, IrF5, IrF3 and IrF2. Alternatively, molecular binary iridium fluorides IrFn (n=1–6) were produced by co‐deposition of laser‐ablated iridium atoms with elemental fluorine in excess neon and argon matrices under cryogenic conditions. Computational studies up to scalar relativistic CCSD(T)/triple‐ζ level and two‐component quasirelativistic DFT computations including spin‐orbit coupling effects supported the formation of these products and provided detailed insights into their molecular structures by their characteristic Ir−F stretching bands. Compared to the Jahn‐Teller effect, the influence of spin‐orbit coupling dominates in IrF5, leading to a triplet ground state with C4v symmetry, which was spectroscopically detected in solid argon and neon matrices.
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Affiliation(s)
- Yan Lu
- Freie Universität Berlin Institut für Chemie und Biochemie-Anorganische Chemie Fabeckstrasse 34/36 14195 Berlin Germany
| | - Yetsedaw A. Tsegaw
- Freie Universität Berlin Institut für Chemie und Biochemie-Anorganische Chemie Fabeckstrasse 34/36 14195 Berlin Germany
| | - Artur Wodyński
- Technische Universität Berlin Institut für Chemie Theoretische Chemie/Quantenchemie Sekr. C7 Strasse des 17. Juni 135 10623 Berlin Germany
| | - Lin Li
- Freie Universität Berlin Institut für Chemie und Biochemie-Anorganische Chemie Fabeckstrasse 34/36 14195 Berlin Germany
| | - Helmut Beckers
- Freie Universität Berlin Institut für Chemie und Biochemie-Anorganische Chemie Fabeckstrasse 34/36 14195 Berlin Germany
| | - Martin Kaupp
- Technische Universität Berlin Institut für Chemie Theoretische Chemie/Quantenchemie Sekr. C7 Strasse des 17. Juni 135 10623 Berlin Germany
| | - Sebastian Riedel
- Freie Universität Berlin Institut für Chemie und Biochemie-Anorganische Chemie Fabeckstrasse 34/36 14195 Berlin Germany
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4
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Wang X, Kuang J, Wu P, Zong Z, Li Z, Wang H, Li J, Dai P, Zhang KY, Liu S, Huang W, Zhao Q. Manipulating Electroluminochromism Behavior of Viologen-Substituted Iridium(III) Complexes through Ligand Engineering for Information Display and Encryption. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2107013. [PMID: 34741357 DOI: 10.1002/adma.202107013] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 10/15/2021] [Indexed: 06/13/2023]
Abstract
Electrically controlling photoluminescence has attracted great research interest and offers many opportunities for technological developments. Electroluminochromic materials undergo redox reactions under low-voltage stimuli to achieve reversible luminescence switching. Till now, photoluminescence switching of a single molecule caused by electrical stimuli is restricted to intensity response because the redox-active moieties are good electron donors or acceptors and electrical stimuli can regulate the photoinduced electron-transfer and affect the luminescence intensity. In this work, the manipulation of the electroluminochromism behavior of a series of viologen-substituted iridium(III) complexes through the regulation of ligand orbital energy levels and electronic communication between the viologen pendants and the iridium(III) complex core is reported. Electrochemical redox reactions reversibly modulate either the luminescence quenching effect or the push-pull electronic effect of the viologen substituents, achieving multicolor "on-off" luminescence response toward electrical stimuli and luminescence manipulation between two emissive states with different wavelengths and lifetimes. To illustrate the promising applications of these electroluminochromic materials, recording and displaying luminescence information under electrical stimuli are demonstrated. Information encryption is realized by letting the electroluminochromism occur in the near-infrared region or in the time domain. Near-infrared camera or time-resolved luminescence analysis can be used to help read the invisible information.
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Affiliation(s)
- Xuecheng Wang
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Jianru Kuang
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Pengcheng Wu
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Zheng Zong
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Zixian Li
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Hao Wang
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Jinlu Li
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Peiling Dai
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Kenneth Yin Zhang
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Shujuan Liu
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Wei Huang
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
- Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Qiang Zhao
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China
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5
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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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6
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Carrod AJ, Graglia F, Male L, Le Duff C, Simpson P, Elsherif M, Ahmed Z, Butt H, Xu GX, Kam-Wing Lo K, Bertoncello P, Pikramenou Z. Photo- and Electrochemical Dual-Responsive Iridium Probe for Saccharide Detection. Chemistry 2021; 28:e202103541. [PMID: 34811834 PMCID: PMC9299874 DOI: 10.1002/chem.202103541] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Indexed: 11/19/2022]
Abstract
Dual detection systems are of interest for rapid, accurate data collection in sensing systems and in vitro testing. We introduce an IrIII complex with a boronic acid receptor site attached to the 2‐phenylpyridine ligand as an ideal probe with photo‐ and electrochemical signals that is sensitive to monosaccharide binding in aqueous solution. The complex displays orange luminescence at 618 nm, which is reduced by 70 and 40 % upon binding of fructose and glucose, respectively. The electro‐chemiluminescent signal of the complex also shows a direct response to monosaccharide binding. The IrIII complex shows the same response upon incorporation into hydrogel matrices as in solution, thus demonstrating the potential of its integration into a device, as a nontoxic, simple‐to‐use tool to observe sugar binding over physiologically relevant pH ranges and saccharide concentrations. Moreover, the complex's luminescence is responsive to monosaccharide presence in cancer cells.
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Affiliation(s)
- Andrew J Carrod
- School of Chemistry, University of Birmingham Edgbaston, Birmingham, B15 2TT, UK
| | | | - Louise Male
- School of Chemistry, University of Birmingham Edgbaston, Birmingham, B15 2TT, UK
| | - Cécile Le Duff
- School of Chemistry, University of Birmingham Edgbaston, Birmingham, B15 2TT, UK
| | - Peter Simpson
- School of Engineering, University of Birmingham Edgbaston, Birmingham, B15 2TT, UK
| | - Mohamed Elsherif
- School of Engineering, University of Birmingham Edgbaston, Birmingham, B15 2TT, UK
| | - Zubair Ahmed
- College of Medical and Dental Sciences, University of Birmingham Edgbaston, Birmingham, B15 2TT, UK
| | - Haider Butt
- School of Engineering, University of Birmingham Edgbaston, Birmingham, B15 2TT, UK
| | - Guang-Xi Xu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Hong Kong, China
| | - Kenneth Kam-Wing Lo
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Hong Kong, China
| | | | - Zoe Pikramenou
- School of Chemistry, University of Birmingham Edgbaston, Birmingham, B15 2TT, UK
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7
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Kampes R, Tepper R, Görls H, Bellstedt P, Jäger M, Schubert US. Facile and Reliable Emission-Based Nanomolar Anion Sensing by Luminescent Iridium Receptors Featuring Chelating Halogen-Bonding Sites. Chemistry 2020; 26:14679-14687. [PMID: 32686111 PMCID: PMC7756348 DOI: 10.1002/chem.202002738] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Indexed: 12/21/2022]
Abstract
An anion sensor is presented that combines a bidentate hydrogen‐ (HB) or halogen‐bonding (XB) site with a luminescent monocationic Ir fragment for strong binding of common anions (Ka up to 6×104
m−1) with diagnostic emission changes. A new emission‐based protocol for fast and reliable detection was derived on the basis of correction for systematic but unspecific background effects. Such a simple correction routine circumvents the hitherto practical limitations of systematic emission‐based analysis of anion binding with validated open‐source software (BindFit). The anticipated order of Ka values was obeyed according to size and basicity of the anions (Cl>Br=OAc) as well as the donor atom of the receptor (XB: 6×104
m−1 > HB: 5×103
m−1), and led to submicromolar limits of detection within minutes. The results were further validated by advanced NMR techniques, and corroborated by X‐ray crystallographic data and DFT analysis, which reproduced the structural and electronic features in excellent agreement. The results suggest that corrected emission‐based sensing may become a complementary, reliable, and fast tool to promote the use of XB in various application fields, due to the simple and fast optical determination at high dilution.
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Affiliation(s)
- Robin Kampes
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743, Jena, Germany.,Jena Center of Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
| | - Ronny Tepper
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743, Jena, Germany.,Jena Center of Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany.,Current address: Intelligent fluids GmbH, Karl-Heine-Strasse 99, 04229, Leipzig, Germany
| | - Helmar Görls
- Laboratory of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743, Jena, Germany
| | - Peter Bellstedt
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743, Jena, Germany.,Laboratory of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743, Jena, Germany
| | - Michael Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743, Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743, Jena, Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743, Jena, Germany.,Jena Center of Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany.,Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743, Jena, Germany
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8
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Cyclometalated Iridium (III) complexes: Recent advances in phosphorescence bioimaging and sensing applications. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5413] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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9
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Jin H, Jin Q, Liang Z, Liu Y, Qu X, Sun Q. Quantum Dot Based Fluorescent Traffic Light Nanoprobe for Specific Imaging of Avidin-Type Biotin Receptor and Differentiation of Cancer Cells. Anal Chem 2019; 91:8958-8965. [PMID: 31251580 DOI: 10.1021/acs.analchem.9b00924] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Sensitive and specific visualization of cell surface biotin receptors (BRs) a class of clinically important biomarkers, remains a challenge. In this work, a dual-emission ratiometric fluorescent nanoprobe is developed for specific imaging of cell surface avidin, a subtype of BRs. The nanoprobe comprises a dual-emission quantum dot nanohybrid, wherein a silica-encapsulated red-emitting QD (rQD@SiO2) is used as the "core" and green-emitting QDs (gQDs) are used as "satellites", which are further decorated with a new "love-hate"-type BR ligand, a phenanthroline-biotin conjugate with an amino linker. The nanoprobe shows intense rQD emission but quenched gQD emission by the BR ligand. Upon imaging, the rQD emission stays constant and the gQD emission is restored as cell surface avidin accrues. Accordingly, the overlaid fluorescence color collected from red and green emission changes from red to yellow and then to green. We refer to such a color change as a traffic light pattern and the nanoprobe as a fluorescent traffic light nanoprobe. We demonstrate the application of our fluorescent traffic light nanoprobe to characterize cancer cells. By the traffic light pattern, cervical carcinoma and normal cells, as well as different-type cancer cells including BR-negative colon cancer cells, BR-positive hepatoma carcinoma cells, breast cancer cells, and their subtypes, have been visually differentiated. We further demonstrate a use of our nanoprobe to distinguish the G2 phase from other stages in a cell cycle. These applications provide new insights into visualizing cell surface biomarkers with remarkable imaging resolution and accuracy.
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Affiliation(s)
- Haojun Jin
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering , Southeast University , Nanjing 210096 , People's Republic of China
| | - Qian Jin
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering , Southeast University , Nanjing 210096 , People's Republic of China
| | - Zhenghui Liang
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering , Southeast University , Nanjing 210096 , People's Republic of China
| | - Yuqian Liu
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering , Southeast University , Nanjing 210096 , People's Republic of China
| | - Xiaojun Qu
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering , Southeast University , Nanjing 210096 , People's Republic of China
| | - Qingjiang Sun
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering , Southeast University , Nanjing 210096 , People's Republic of China
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10
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Meng X, Shi Y, Chen Z, Song L, Zhao M, Zou L, Liu S, Huang W, Zhao Q. Extending Hypochlorite Sensing from Cells to Elesclomol-Treated Tumors in Vivo by Using a Near-Infrared Dual-Phosphorescent Nanoprobe. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35838-35846. [PMID: 30260621 DOI: 10.1021/acsami.8b14717] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Reactive oxygen species (ROS), when beyond the threshold, can exhaust the capacity of cellular antioxidants and ultimately trigger cell apoptosis in tumor biology. However, the roles of hypochlorite (ClO-) in this process are much less clear compared with those of ROS, and its detection is easily obstructed by tissue penetration and endogenous fluorophores. Herein, we first synthesized a near-infrared (NIR) ratiometric ClO- probe (Ir NP) composed of two kinds of phosphorescent iridium(III) complexes (Ir1 and Ir2) encapsulated with amphiphilic DSPE-mPEG5000. Ir NPs are dual-emissive and show obvious changes in phosphorescence intensity ratios and lifetimes of two emission bands upon exposure to ClO-. During the ClO- detection, ratiometric photoluminescence imaging is much more reliable over the intensity-based one for its self-calibration, while time-resolved photoluminescence imaging (TRPI) could distinguish the phosphorescence with long lifetime of Ir NPs from short-lived autofluorescence of tissues, resulting in the high accuracy of ClO- determination. With NIR emission, a long phosphorescence lifetime, fast response, and excellent biocompatibility, Ir NPs were applied to the detection of ClO- in vitro and in vivo by means of ratiometric phosphorescence imaging and TRPI with high signal-to noise-ratios (SNR). Importantly, we demonstrated the elevated ClO- in elesclomol-stimulated tumors in living mice for the first time, which holds great potential for the visualization of the boost of ClO- in anti-carcinogen-treated tumors and the further investigation of ROS-related oncotherapeutics.
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Affiliation(s)
- Xiangchun Meng
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) , Nanjing University of Posts and Telecommunications (NUPT) , Nanjing 210023 , PR China
| | - Yuxiang Shi
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) , Nanjing University of Posts and Telecommunications (NUPT) , Nanjing 210023 , PR China
| | - Zejing Chen
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) , Nanjing University of Posts and Telecommunications (NUPT) , Nanjing 210023 , PR China
| | - Linna Song
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) , Nanjing University of Posts and Telecommunications (NUPT) , Nanjing 210023 , PR China
| | - Menglong Zhao
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) , Nanjing University of Posts and Telecommunications (NUPT) , Nanjing 210023 , PR China
| | - Liang Zou
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) , Nanjing University of Posts and Telecommunications (NUPT) , Nanjing 210023 , PR China
| | - Shujuan Liu
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) , Nanjing University of Posts and Telecommunications (NUPT) , Nanjing 210023 , PR China
| | - Wei Huang
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) , Nanjing University of Posts and Telecommunications (NUPT) , Nanjing 210023 , PR China
- Shaanxi Institute of Flexible Electronics (SIFE) , Northwestern Polytechnical University (NPU) , Xi'an 710072 , Shaanxi , China
| | - Qiang Zhao
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) , Nanjing University of Posts and Telecommunications (NUPT) , Nanjing 210023 , PR China
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11
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Lee LC, Cheung HM, Liu H, Lo KK. Exploitation of Environment‐Sensitive Luminophores in the Design of Sydnone‐Based Bioorthogonal Imaging Reagents. Chemistry 2018; 24:14064-14068. [DOI: 10.1002/chem.201803452] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 07/10/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Lawrence Cho‐Cheung Lee
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue Kowloon, Hong Kong P. R. China
| | - Hugo Man‐Hin Cheung
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue Kowloon, Hong Kong P. R. China
| | - Hua‐Wei Liu
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue Kowloon, Hong Kong P. R. China
| | - Kenneth Kam‐Wing Lo
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue Kowloon, Hong Kong P. R. China
- State Key Laboratory of Millimeter WavesCity University of Hong Kong Tat Chee Avenue Kowloon, Hong Kong P. R. China
- Center of Functional PhotonicsCity University of Hong Kong Tat Chee Avenue Kowloon, Hong Kong P. R. China
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12
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Keller SG, Pannwitz A, Mallin H, Wenger OS, Ward TR. Streptavidin as a Scaffold for Light-Induced Long-Lived Charge Separation. Chemistry 2017; 23:18019-18024. [PMID: 29024136 DOI: 10.1002/chem.201703885] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Indexed: 01/03/2023]
Abstract
Long-lived photo-driven charge separation is demonstrated by assembling a triad on a protein scaffold. For this purpose, a biotinylated triarylamine was added to a RuII -streptavidin conjugate bearing a methyl viologen electron acceptor covalently linked to the N-terminus of streptavidin. To improve the rate and lifetime of the electron transfer, a negative patch consisting of up to three additional negatively charged amino acids was engineered through mutagenesis close to the biotin-binding pocket of streptavidin. Time-resolved laser spectroscopy revealed that the covalent attachment and the negative patch were beneficial for charge separation within the streptavidin hosted triad; the charge separated state was generated within the duration of the excitation laser pulse, and lifetimes up to 3120 ns could be achieved with the optimized supramolecular triad.
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Affiliation(s)
- Sascha G Keller
- Department of Chemistry, University of Basel, Mattenstrasse 24a, CH-4002, Basel, Switzerland
| | - Andrea Pannwitz
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056, Basel, Switzerland
| | - Hendrik Mallin
- Department of Chemistry, University of Basel, Mattenstrasse 24a, CH-4002, Basel, Switzerland
| | - Oliver S Wenger
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056, Basel, Switzerland
| | - Thomas R Ward
- Department of Chemistry, University of Basel, Mattenstrasse 24a, CH-4002, Basel, Switzerland
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13
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Yarnell JE, De La Torre P, Castellano FN. Efficient Phosphorescence from Naphthalenebenzimidizole‐Coordinated Iridium(III) Chromophores. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700669] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- James E. Yarnell
- Department of Chemistry North Carolina State University 27695‐8204 Raleigh North Carolina USA
| | - Patricia De La Torre
- Department of Chemistry North Carolina State University 27695‐8204 Raleigh North Carolina USA
| | - Felix N. Castellano
- Department of Chemistry North Carolina State University 27695‐8204 Raleigh North Carolina USA
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14
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Otto S, Scholz N, Behnke T, Resch-Genger U, Heinze K. Thermo-Chromium: A Contactless Optical Molecular Thermometer. Chemistry 2017; 23:12131-12135. [DOI: 10.1002/chem.201701726] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Indexed: 01/06/2023]
Affiliation(s)
- Sven Otto
- Institute of Inorganic Chemistry and Analytical Chemistry; Johannes Gutenberg-University of Mainz; Duesbergweg 10-14 55128 Mainz Germany
- Graduate School Materials Science in Mainz; Staudingerweg 9 55128 Mainz Germany
| | - Norman Scholz
- Division 1.10; Federal Institute for Materials Research and Testing (BAM); Richard-Willstätter-Strasse 11 12489 Berlin Germany
| | - Thomas Behnke
- Division 1.10; Federal Institute for Materials Research and Testing (BAM); Richard-Willstätter-Strasse 11 12489 Berlin Germany
| | - Ute Resch-Genger
- Division 1.10; Federal Institute for Materials Research and Testing (BAM); Richard-Willstätter-Strasse 11 12489 Berlin Germany
| | - Katja Heinze
- Institute of Inorganic Chemistry and Analytical Chemistry; Johannes Gutenberg-University of Mainz; Duesbergweg 10-14 55128 Mainz Germany
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15
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Mukhopadhyay S, Singh RS, Biswas A, Maiti B, Pandey DS. Molecular and Nanoaggregation in Cyclometalated Iridium(III) Complexes through Structural Modification. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600563] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sujay Mukhopadhyay
- Department of Chemistry; Institute of Science; Banaras Hindu University; 221005 Varanasi U.P. India
| | - Roop Shikha Singh
- Department of Chemistry; Institute of Science; Banaras Hindu University; 221005 Varanasi U.P. India
| | - Arnab Biswas
- Department of Chemistry; Institute of Science; Banaras Hindu University; 221005 Varanasi U.P. India
| | - Biswajit Maiti
- Department of Chemistry; Institute of Science; Banaras Hindu University; 221005 Varanasi U.P. India
| | - Daya Shankar Pandey
- Department of Chemistry; Institute of Science; Banaras Hindu University; 221005 Varanasi U.P. India
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16
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Li R, Zheng FK, Xiao Y, Zhao YP, Xu JG, Yan Y, Guo GC. Tunable dual-emissive photoluminescence of a zinc(II) coordination polymer based on tetrazolate-carboxylatate acid and 4,4′-bipyridine mixed organic chromophores. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.06.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Mao Z, Wang M, Liu J, Liu LJ, Lee SMY, Leung CH, Ma DL. A long lifetime switch-on iridium(iii) chemosensor for the visualization of cysteine in live zebrafish. Chem Commun (Camb) 2016; 52:4450-3. [DOI: 10.1039/c6cc01008c] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A long lifetime iridium(iii) complex chemosensor1for cysteine detection has been synthesized.
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Affiliation(s)
- Zhifeng Mao
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Modi Wang
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Jinbiao Liu
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Li-Juan Liu
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- Macao
- China
| | - Simon Ming-Yuen Lee
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- Macao
- China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- Macao
- China
| | - Dik-Lung Ma
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
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18
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Manikandamathavan VM, Duraipandy N, Kiran MS, Vaidyanathan VG, Nair BU. A new platinum(ii) complex for bioimaging applications. RSC Adv 2015. [DOI: 10.1039/c5ra00002e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
A new Pt(ii) complex bearing terpyridine derivative exhibit specificity towards nuclear DNA. The staining ability has been explored in cell imaging as well as in gel electrophoresis an alternative to highly mutagenic ethidium bromide.
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Affiliation(s)
| | - Natarajan Duraipandy
- Biomaterials Laboratory
- CSIR-Central Leather Research Institute
- Chennai 600020
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Manikantan S. Kiran
- Biomaterials Laboratory
- CSIR-Central Leather Research Institute
- Chennai 600020
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Vaidyanathan G. Vaidyanathan
- Biophysics Laboratory
- CSIR-Central Leather Research Institute
- Chennai 600020
- India
- Academy of Scientific and Innovative Research (AcSIR)
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19
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Clède S, Policar C. Metal-carbonyl units for vibrational and luminescence imaging: towards multimodality. Chemistry 2014; 21:942-58. [PMID: 25376740 DOI: 10.1002/chem.201404600] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Metal-carbonyl complexes are attractive structures for bio-imaging. In addition to unique vibrational properties due to the CO moieties enabling IR and Raman cell imaging, the appropriate choice of ancillary ligands opens up the opportunity for luminescence detection. Through a classification by techniques, past and recent developments in the application of metal-carbonyl complexes for vibrational and luminescence bio-imaging are reviewed. Finally, their potential as bimodal IR and luminescent probes is addressed.
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Affiliation(s)
- Sylvain Clède
- Ecole Normale Supérieure, PSL Research University, Département de Chimie, Sorbonne Universités-UPMC Univ Paris 06, CNRS-ENS-UPMC, Laboratoire des Biomolécules, UMR7203, 24, rue Lhomond, 75005 Paris (France), Fax: (+33) 1-4432-3389
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20
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He L, Tan CP, Ye RR, Zhao YZ, Liu YH, Zhao Q, Ji LN, Mao ZW. Theranostic Iridium(III) Complexes as One- and Two-Photon Phosphorescent Trackers to Monitor Autophagic Lysosomes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407468] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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21
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He L, Tan CP, Ye RR, Zhao YZ, Liu YH, Zhao Q, Ji LN, Mao ZW. Theranostic Iridium(III) Complexes as One- and Two-Photon Phosphorescent Trackers to Monitor Autophagic Lysosomes. Angew Chem Int Ed Engl 2014; 53:12137-41. [DOI: 10.1002/anie.201407468] [Citation(s) in RCA: 150] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 08/19/2014] [Indexed: 01/07/2023]
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22
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Choi AWT, Yim VMW, Liu HW, Lo KKW. Rhenium(I) Polypyridine Diamine Complexes as Intracellular Phosphorogenic Sensors: Synthesis, Characterization, Emissive Behavior, Biological Properties, and Nitric Oxide Sensing. Chemistry 2014; 20:9633-42. [DOI: 10.1002/chem.201402502] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Indexed: 11/09/2022]
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23
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Giridhar T, Han TH, Cho W, Saravanan C, Lee TW, Jin SH. An Easy Route to Red Emitting Homoleptic IrIIIComplex for Highly Efficient Solution-Processed Phosphorescent Organic Light-Emitting Diodes. Chemistry 2014; 20:8260-4. [DOI: 10.1002/chem.201400243] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Indexed: 11/09/2022]
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24
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Law WHT, Leung KK, Lee LCC, Poon CS, Liu HW, Lo KKW. Cyclometalated Iridium(III) Bipyridyl-Phenylenediamine Complexes with Multicolor Phosphorescence: Synthesis, Electrochemistry, Photophysics, and Intracellular Nitric Oxide Sensing. ChemMedChem 2014; 9:1316-29. [DOI: 10.1002/cmdc.201400040] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Indexed: 11/08/2022]
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25
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Maity A, Choi JS, Teets TS, Deligonul N, Berdis AJ, Gray TG. Cyclometalated Iridium(III) Complexes with Deoxyribose Substituents. Chemistry 2013; 19:15924-32. [DOI: 10.1002/chem.201301776] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Indexed: 02/06/2023]
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26
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Zhou Y, Jia J, Li W, Fei H, Zhou M. Luminescent biscarbene iridium(iii) complexes as living cell imaging reagents. Chem Commun (Camb) 2013; 49:3230-2. [DOI: 10.1039/c3cc40845k] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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27
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A Luminescent Cyclometalated Iridium(III) Complex Accumulates in Mitochondria and Induces Mitochondrial Shortening by Conjugation to Specific Protein Targets. Chembiochem 2012; 13:2729-37. [DOI: 10.1002/cbic.201200517] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2012] [Indexed: 01/05/2023]
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28
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Marchi E, Sinisi R, Bergamini G, Tragni M, Monari M, Bandini M, Ceroni P. Easy separation of Δ and Λ isomers of highly luminescent [Ir(III)]-cyclometalated complexes based on chiral phenol-oxazoline ancillary ligands. Chemistry 2012; 18:8765-73. [PMID: 22689328 DOI: 10.1002/chem.201200709] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Indexed: 11/06/2022]
Abstract
A new class of neutral cyclometalated iridium(III) complexes with enantiomerically pure C(1)-symmetric phenol-oxazolines (3a,b) have been synthetized in high yields and fully characterized. Resolution of the corresponding Δ(R) and Λ(R) or Δ(S) and Λ(S) isomers was easily achieved by conventional flash chromatography. The corresponding Δ and Λ helicities have been confirmed by CD spectroscopy and X-ray crystallography. Regarding the absorption and luminescence properties with unpolarized light, no significant difference between Δ and Λ isomers has been observed. A strong blue luminescence is observed for deaerated solutions of complexes 5a and 5b in CH(3)CN.
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Affiliation(s)
- Enrico Marchi
- Dipartimento di Chimica G. Ciamician, Alma Mater Studiorum, Università di Bologna via Selmi 2, 40126 Bologna 40126, Italy
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Morimoto T, Ito M, Koike K, Kojima T, Ozeki T, Ishitani O. Dual Emission from Rhenium(I) Complexes Induced by an Interligand Aromatic Interaction. Chemistry 2012; 18:3292-304. [DOI: 10.1002/chem.201102698] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Indexed: 11/10/2022]
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30
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Li SY, Liu HW, Zhang K, Lo KW. Modification of Luminescent Iridium(III) Polypyridine Complexes with Discrete Poly(ethylene glycol) (PEG) Pendants: Synthesis, Emissive Behavior, Intracellular Uptake, and PEGylation Properties. Chemistry 2010; 16:8329-39. [DOI: 10.1002/chem.201000474] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Cationic heteroleptic cyclometalated iridium(III) complexes containing phenyl-triazole and triazole-pyridine clicked ligands. Molecules 2010; 15:2039-59. [PMID: 20336031 PMCID: PMC6257372 DOI: 10.3390/molecules15032039] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Revised: 03/08/2010] [Accepted: 03/18/2010] [Indexed: 11/17/2022] Open
Abstract
Novel heteroleptic iridium complexes containing the 1-substituted-4-phenyl-1H-1,2,3-triazole (phtl) cyclometalating ligand have been synthesized. The 3+2 Huisgen dipolar cycloaddition method (‘click’ chemistry) was utilized to prepare a class of bidentate ligands (phtl) bearing different substituents on the triazole moiety. By using various ligands (phtl-R1 and pytl-R2) (R1=adamantane, methyl and R2=adamantane, methyl, β-cyclodextrin, ursodeoxycholic acid), we prepared a small library of new luminescent ionic iridium complexes [Ir(phtr-R1)2(pytl-R2)]Cl and report on their photophysical properties. The flexibility of the clicking approach allows a straightforward control on the chemical-physical properties of the complexes by varying the nature of the substituent on the ligand.
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Koo CK, So LY, Wong KL, Ho YM, Lam YW, Lam MW, Cheah KW, Cheng CW, Kwok WM. A Triphenylphosphonium-Functionalised Cyclometalated Platinum(II) Complex as a Nucleolus-Specific Two-Photon Molecular Dye. Chemistry 2010; 16:3942-50. [DOI: 10.1002/chem.200902919] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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33
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Hudson ZM, Zhao SB, Wang RY, Wang S. Switchable ambient-temperature singlet-triplet dual emission in nonconjugated donor-acceptor triarylboron-Pt(II) complexes. Chemistry 2009; 15:6131-7. [PMID: 19472234 DOI: 10.1002/chem.200900641] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A triarylboron compound Si-BNPA (1) containing a BMes(2) acceptor and an N-(2'-pyridyl)-7-azaindolyl (NPA) donor linked by a tetrahedral silane group has been synthesised. This molecule displays unusual white singlet-triplet dual emission at 77 K, with an exceptionally long phosphorescent decay time (2.2 s). Fluoride titration experiments established that the singlet and triplet emission peaks are due to acceptor-based Mes-->B charge transfer and donor-based 3pi-->pi* transitions, respectively. This dual emission was found to be persistent and observable at ambient temperature in its Pt(II) complex [Pt(N,N-Si-BNPA)Ph2] (2a). Furthermore, 2a was found to undergo intramolecular "roll-over" C-H activation to produce the N,C-chelate complex [Pt(N,C-Si-BNPA)(SMe2)Ph] (2b). This compound also displays ambient temperature singlet-triplet dual emission, but with a much greater phosphorescent efficiency than 2a due to the formation of a more stable chelate ring. Addition of fluoride was found to have little impact on the phosphorescent emission of 2a, but resulted in a large enhancement of the phosphorescent emission intensity of 2b. To establish the impact of donor-acceptor geometry on this singlet-triplet dual emission, the properties of linearly conjugated donor-acceptor complexes [Pt(N,N-BNPA)Ph2] (3a) and [Pt(N,C-BNPA)Ph2] (3b) were also examined. Consistent with 2a and 2b, the N,C-chelate complex 3b has a much higher phosphorescent efficiency than the N,N-chelate 3a. Although 3a and 3b show bright and fluoride-switchable phosphorescence at ambient temperature, they are not dual emissive and show only metal-to-ligand chage-transfer-based phosphorescence. The non-conjugated donor-acceptor geometry and the overlap of the donor and acceptor singlet and triplet excitation bands in Si-BNPA and its Pt(II) complexes may thus be the key for achieving singlet-triplet dual emission on two separated chromophores in a single molecule.
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Affiliation(s)
- Zachary M Hudson
- Department of Chemistry, Queen's University, Kingston, Ontario, K7 L 3N6, Canada
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