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McCarthy JS, McCormick MJ, Zimmerman JH, Hambrick HR, Thomas WM, McMillen CD, Wagenknecht PS. Role of the Trifluoropropynyl Ligand in Blue-Shifting Charge-Transfer States in Emissive Pt Diimine Complexes and an Investigation into the PMMA-Imposed Rigidoluminescence and Rigidochromism. Inorg Chem 2022; 61:11366-11376. [PMID: 35820113 DOI: 10.1021/acs.inorgchem.2c01564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Square-planar PtII complexes are of interest as dopants for the emissive layer of organic light-emitting diodes. Herein, the photophysics of three Pt bipyridyl complexes with the strongly e- withdrawing, high-field, 3,3,3-trifluoropropynyl ligand has been investigated. One complex, (phbpy)PtC2CF3 (phbpy = 6-phenyl-2,2'-dipyridyl), has also been characterized by single-crystal X-ray diffraction. All complexes reported are emissive in both RT CH2Cl2 solution (ΦPL = 0.007 to 0.027) and PMMA film (ΦPL = 0.25 to 0.42). The trifluoropropynyl ligand elevates the energy of the MLCT and LL'CT states above that of the IL π-π* state, resulting in IL emission in all cases. The emission energies of the trifluoropropynyl compounds are also blue-shifted relative to the analogous pentafluorophenylethynyl compounds, suggesting that the trifluoropropynyl ligand is one of the most electron-withdrawing alkynyl ligands. Rate constants for radiative and nonradiative deactivation were determined from experimentally determined values of ΦPL and excited-state lifetimes in both solution and PMMA films. The increase in ΦPL upon incorporation into PMMA film (rigidoluminescence) results from a decrease in the rate constant for non-radiative relaxation. Experimental activation energies for excited-state decay in combination with TDDFT are consistent with the rigidoluminescence resulting from an increase in the energy of the non-emissive triplet metal-centered state. Two of the complexes investigated, (Ph2bpy)Pt(C2CF3)2 and (t-Bu2bpy)Pt(C2CF3)2, where t-Bu2bpy = 4,4'-di-tert-butyl-2,2'-dipyridyl and Ph2bpy = 4,4'-diphenyl-2,2'-dipyridyl, exhibit concentration-dependent excimer emission (orange) along with monomer emission (blue), enabling fine-tuning of the emission color. However, excimer emission was absent in cured PMMA films up to the solubility limit for solution processing of (Ph2bpy)Pt(C2CF3)2 in CH2Cl2, demonstrating the diffusional nature of excimer formation.
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Affiliation(s)
- Jackson S McCarthy
- Department of Chemistry, Furman University, Greenville, South Carolina 29609, United States
| | - Mary Jo McCormick
- Department of Chemistry, Furman University, Greenville, South Carolina 29609, United States
| | - John H Zimmerman
- Department of Chemistry, Furman University, Greenville, South Carolina 29609, United States
| | - H Rhodes Hambrick
- Department of Chemistry, Furman University, Greenville, South Carolina 29609, United States
| | - Wilson M Thomas
- Department of Chemistry, Furman University, Greenville, South Carolina 29609, United States
| | - Colin D McMillen
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634, United States
| | - Paul S Wagenknecht
- Department of Chemistry, Furman University, Greenville, South Carolina 29609, United States
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2
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Martìnez-Vollbert E, Ciambrone C, Lafargue-Dit-Hauret W, Latouche C, Loiseau F, Lanoë PH. Bis-Heteroleptic Cationic Iridium(III) Complexes Featuring Cyclometalating 2-Phenylbenzimidazole Ligands: A Combined Experimental and Theoretical Study. Inorg Chem 2022; 61:3033-3049. [PMID: 35143722 DOI: 10.1021/acs.inorgchem.1c02968] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this report, we investigate a new family of cationic iridium(III) complexes featuring the cyclometalating ligand 2-phenylbenzimidazole and ancillary ligand 4,4'-dimethyl-2,2'-bipyridine. Our benchmark complex IrL12 (L1 = 2-phenylbenzimidazole) displays emission properties similar to those of the archetypical complex 2,2'-dipyridylbis(2',4'-phenylpyridine)iridium(III) in deaerated CH3CN (Φ = 0.20, λem = 584 nm and Φ = 0.14, λem = 585 nm, respectively) but exhibits a higher photoluminescence quantum yield in deaerated CH2Cl2 (Φ = 0.32, λem = 566 nm and Φ = 0.20, λem = 595 nm, respectively) and especially a lower nonradiative constant (knr = 6.6 × 105 s-1 vs knr = 1.4 × 106 s-1, respectively). As a primary investigation, we explored the influence of the introduction of electron-donating and electron-withdrawing groups on the benzimidazole moiety and the synergetic effect of the substitution of the cyclometalating phenyl moiety at the para position with the same substituents. The emission energy displays very good correlation with the Hammett constants of the introduced substituents as well as with ΔEredox values, which allow us to ascribe the phosphorescence of these series to emanate mainly from a mixed metal/ligand to ligand charge transfer triplet excited state (3M/LLCT*). Two complexes (IrL52 and IrL82) display a switch of the lowest triplet excited state from 3M/LLCT* to ligand centered (3LC*), from the less polar CH2Cl2 to the more polar CH3CN. The observed results are supported by (TD)-DFT computations considering the vibrational contributions to the electronic transitions. Chromaticity diagrams based on the maximum emission wavelength of the recorded and simulated phosphorescence spectra demonstrate the strong promise of our complexes as emitting materials, together with the very good agreement between experimental and theoretical results.
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Affiliation(s)
| | | | | | - Camille Latouche
- Université de Nantes, CNRS, Institut des Matériaux Jean Rouxel, IMN, F-44000 Nantes, France
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3
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Chen Z, Wang H, Hu L, Zhu S, Liu R, Zhu H. Pt(II) diimine complexes bearing varied alkyl chains: Synthesis, tunable photophysical properties and aggregation-induced optical power limiting enhancement. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Roy S, Lopez AA, Yarnell JE, Castellano FN. Metal-Metal-to-Ligand Charge Transfer in Pt(II) Dimers Bridged by Pyridyl and Quinoline Thiols. Inorg Chem 2021; 61:121-130. [PMID: 34955020 DOI: 10.1021/acs.inorgchem.1c02469] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The investigation of two distinct species of square planar dinuclear Pt(II) dimers based on anti-[Pt(C∧N)(μ-N∧S)]2, where C∧N is either 2-phenylpyridine (ppy) or benzo(h)quinoline (bzq) and N∧S is pyridine-2-thiol (pyt), 6-methylpyridine-2-thiol (Mpyt), or 2-quinolinethiol (2QT), is presented. Each molecule was thoroughly characterized with electronic structure calculations, static UV-vis and photoluminescence (PL) spectroscopy, and cyclic voltammetry, along with transient absorbance and time-gated PL experiments. These visible absorbing chromophores feature metal-metal-to-ligand charge-transfer (MMLCT) excited states that originate from intramolecular d8-d8 metal-metal σ-interactions and are manifested in the ground- and excited-state properties of these molecules. All five molecules reported (anti-[Pt(ppy)(μ-Mpyt)]2 could not be isolated), three of which are newly conceived here, possess electronic absorptions past 500 nm and high quantum yield PL emission with spectra extending into the far red (λem > 700 nm), originating from the charge-transfer state in each instance. Each chromophore displays excited-state decay kinetics adequately modeled by single exponentials as recorded using dynamic absorption and PL experiments; each technique yields similar decay kinetics. The combined data illustrate that pyridyl and quinoline-thiolates in conjunction with select cyclometalates represent classes of MMLCT chromophores that exhibit excited-state properties suitable for promoting light-energized chemical reactions and provide a molecular platform suitable for evaluating coherence phenomena in transient metal-metal bond-forming photochemistry.
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Affiliation(s)
- Subhangi Roy
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Antonio A Lopez
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - James E Yarnell
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Felix N Castellano
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
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5
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Ai Y, Li Y, Chan MHY, Xiao G, Zou B, Yam VWW. Realization of Distinct Mechano- and Piezochromic Behaviors via Alkoxy Chain Length-Modulated Phosphorescent Properties and Multidimensional Self-Assembly Structures of Dinuclear Platinum(II) Complexes. J Am Chem Soc 2021; 143:10659-10667. [PMID: 34232026 DOI: 10.1021/jacs.1c04200] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this work, through the introduction of different lengths of alkoxy chains to the dinuclear cyclometalated platinum(II) complexes, the apparent color, solubility, luminescence properties, and self-assembly behaviors have been remarkably modulated. In the solid state, the luminescence properties have been found to arise from emission origins that switch between the 3MMLCT excited state in the red solids and the 3IL excited state in the yellow state, depending on the alkoxy chain lengths. The luminescence of the yellow solids is found to show obvious bathochromic shifts under mechanical grinding and decreased intensity under controllable hydrostatic pressure. However, the emission of the red solids exhibits both a bathochromic shift and reduced intensity due to the isotropic compression-induced shortening of the Pt···Pt and π-π distances. By combining the data obtained from X-ray diffraction (XRD), infrared (IR), and X-ray single crystal structure, a better understanding of the relationship between molecular aggregation and photophysical properties has been realized, suggesting that the length of the alkoxy chains plays an important role in governing the supramolecular assemblies.
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Affiliation(s)
- Yeye Ai
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China.,Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Hong Kong, P. R. China
| | - Yongguang Li
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Michael Ho-Yeung Chan
- Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Hong Kong, P. R. China
| | - Guanjun Xiao
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Bo Zou
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Vivian Wing-Wah Yam
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China.,Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Hong Kong, P. R. China
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6
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Yang W, Sukhanov AA, Lim JH, Li X, Meng Y, Zhao J, Sun H, Lee JY, Gurzadyan GG, Voronkova VK. N^N Pt(II) Bisacetylide Complexes with Oxoverdazyl Radical Ligands: Preparation, Photophysical Properties, and Magnetic Exchange Interaction between the Two Radical Ligands. Inorg Chem 2020; 59:12471-12485. [PMID: 32786395 DOI: 10.1021/acs.inorgchem.0c01575] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
To study the effect of a stable radical on the photophysical properties of a phosphorescent Pt(II) coordination framework and the intramolecular magnetic interaction between radical ligands in the N^N Pt(II) bisacetylide complexes, we prepared a series of N^N Pt(II) bis(acetylide) complexes with oxoverdazyl radical acetylide ligands. The linker between the Pt(II) center and the spin carrier was systematically varied, to probe the effect on the sign and magnitude of the spin exchange interactions between the radical ligands and photophysical properties. The complexes were studied with steady-state and femtosecond/nanosecond transient absorption spectroscopy, continuous-wave electron paramagnetic resonance (EPR) spectroscopy, and density functional theory (DFT) computations. The transient absorption spectral studies show that the doublet excited state of the radicals are short-lived (τD ≈ 2 ps) and nonfluorescent. Moreover, the intrinsic long-lived triplet excited state (τT = 1.2 μs) of the Pt(II) coordination center was efficiently quenched by the radical (τT = 6.9 ps for one representative radical Pt(II) complex). The intramolecular magnetic interaction between the radical ligands through the diamagnetic Pt(II) atom was studied with temperature-dependent EPR spectroscopy; antiferromagnetic exchange interaction (-J S1S2, J = -5.4 ± 0.1 cm-1) for the complex with the shortest radical-radical distance through bridge fragments was observed. DFT computations give similar results for the sign and magnitude of the J values. For complexes with larger inter-radical distance, however, very weak coupling between the radical ligands was observed (|J| < 0.7 cm-1). Our results are useful for the study of the effect of a radical on the photophysical properties of the phosphorescent transition-metal complexes.
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Affiliation(s)
- Wenbo Yang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian 116024, P. R. China
| | - Andrei A Sukhanov
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan 420029, Russia
| | - Jong Hyeon Lim
- Department of Chemistry, Sungkyunkwan University, 2066 Seobu-Ro, Jangan-Gu, Suwon 16419, South Korea
| | - Xiaoxin Li
- Institute of Artificial Photosynthesis, State Key Laboratory of Fine Chemicals, Dalian University of Technology, F-209 West Campus, 2 Ling Gong Road, Dalian 116024, P. R. China
| | - Yinshan Meng
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian 116024, P. R. China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian 116024, P. R. China
| | - Haoling Sun
- Department of Chemistry and Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing Normal University, Beijing 100875, P. R. China
| | - Jin Yong Lee
- Department of Chemistry, Sungkyunkwan University, 2066 Seobu-Ro, Jangan-Gu, Suwon 16419, South Korea
| | - Gagik G Gurzadyan
- Institute of Artificial Photosynthesis, State Key Laboratory of Fine Chemicals, Dalian University of Technology, F-209 West Campus, 2 Ling Gong Road, Dalian 116024, P. R. China
| | - Violeta K Voronkova
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan 420029, Russia
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7
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Bauer S, Záliš S, Fiedler J, Ringenberg MR, Kaim W. Oxidation State Assignments in the Organoplatinum One‐Electron Redox Series [(N
^
N)PtMes
2
]
n
,
n
= +,0, –,2‐. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000257] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Sonja Bauer
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55 70550 Stuttgart Germany
| | - Stanislav Záliš
- J. Heyrovský Institute of Physical Chemistry The Czech Academy of Sciences Dolejškova 3 18223 Prague Czech Republic
| | - Jan Fiedler
- J. Heyrovský Institute of Physical Chemistry The Czech Academy of Sciences Dolejškova 3 18223 Prague Czech Republic
| | - Mark R. Ringenberg
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55 70550 Stuttgart Germany
| | - Wolfgang Kaim
- Institut für Anorganische Chemie Universität Stuttgart Pfaffenwaldring 55 70550 Stuttgart Germany
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8
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Irmler P, Gogesch FS, Mang A, Bodensteiner M, Larsen CB, Wenger OS, Winter RF. Directing energy transfer in Pt(bodipy)(mercaptopyrene) dyads. Dalton Trans 2019; 48:11690-11705. [PMID: 31265019 DOI: 10.1039/c9dt01737b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We report on the photophysical properties of three dyads that combine a 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (bodipy, BDP) and a mercaptopyrene (SPyr) dye ligand at a Pt(PEt3)2 fragment. σ-Bonding of the dyes to the Pt ion promotes intersystem crossing (ISC) via the external heavy atom effect. The coupling of efficient ISC with charge-transfer from the electron-rich mercaptopyrene to the electron-accepting BDP ligand (PB-CT) gives rise to a multitude of (potentially) emissive states. This culminates in the presence of four different emissions for the mono- and dinuclear complexes BPtSPyr and BPtSPyrSPtB with an unsubstituted BDP ligand and either a terminal 1-mercaptopyrene or a bridging pyrene-1,6-dithiolate ligand. Thus, in fluid solution, near IR emission at 724 nm from the 3PB-CT state is observed with a quantum yield of up to 15%. Excitation into the BDP-based 1ππ* or the pyrene-based 1ππ* band additionally trigger fluorescence and phosphorescence emissions from the BDP-centred 1ππ* and 3ππ* states. In frozen solution, at 77 K, phosphorescence from the pyrene ligand becomes the prominent emission channel, while PB-CT emission is absent. Alkylation of the BDP ligand in KBPtSPyr funnels all excitation energy into fluorescence and phosphorescence emissions from the KBDP ligand. The assignments of the various excited states and the deactivation cascades were probed by absorption and emission spectroscopy, transient absorption spectroscopy, electrochemical and UV/Vis/NIR spectroelectrochemical measurements, and by quantum chemical calculations. Our conclusions are further corroborated with the aid of suitable reference compounds comprising of just one chromophore. All dyads are triplet sensitizers and are able to generate singlet oxygen.
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Affiliation(s)
- Peter Irmler
- Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, D-78457 Konstanz, Germany.
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9
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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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10
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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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11
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Tang M, Zhu S, Liu R, Wang J, Zhang Z, Zhu H. Synthesis, characterization and optical properties of novel Ir(III) complexes bearing N-heterocycle substituents. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2018.11.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Zhong F, Zhao J, Hayvali M, Elmali A, Karatay A. Effect of Molecular Conformation Restriction on the Photophysical Properties of N^N Platinum(II) Bis(ethynylnaphthalimide) Complexes Showing Close-Lying 3MLCT and 3LE Excited States. Inorg Chem 2019; 58:1850-1861. [PMID: 30672269 DOI: 10.1021/acs.inorgchem.8b02558] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Using naphthalimide (NI), complexes (Pt-PhNI and Pt-PhMeNI) based on the N^N platinum(II) bis(phenylacetylide) coordination framework were prepared, in which there are two close-lying triplet states, i.e., the metal-to-ligand-charge-transfer (3MLCT) and the NI localized emissive state (3LE). Pt-PhNI has better electronic communication between the Pt coordination center and the NI moiety, whereas in Pt-PhMeNI, they are more isolated by orthogonal geometry. For Pt-PhMeNI, the S0 → 1MLCT and S0 → 1LE absorption bands are separated by 5655 cm-1, while they are more overlapped in Pt-PhNI. The 3MLCT → S0 and 3LE → S0 dual phosphorescence emissions were observed for both Pt-PhNI (in toluene) and Pt-PhMeNI (in benzonitrile). The molecular conformation tunes the 3MLCT/3LE state population ratio, and the orthogonal geometry makes the 3LE state in Pt-PhMeNI basically a dark state (in toluene). Switching of the relative energy levels of the 3MLCT/3LE states by variation of the solvent polarity and temperature was achieved. For Pt-PhMeNI, the energy level of 3MLCT state is higher in a polar solvent; thus, the 3MLCT emission decreases, while the phosphorescence lifetime is prolonged from 9.5 μs (in toluene) to 58 μs (in benzonitrile) because of the different equilibria with the nonemissive 3LE state. Conversely, increasing the temperature enhances the upward transition from the nonemissive 3LE state to the emissive 3MLCT state; as such, the phosphorescence of Pt-PhMeNI was intensified at higher temperature (which is unusual), and the phosphorescence lifetime decreased from 58 μs (298 K) to ca. 5 μs (348 K). The ultrafast intersystem crossing (ca. 0.5 ps) and intramolecular triplet-triplet energy transfer (3-11 ps) were studied by femtosecond transient absorption spectroscopy. These results are useful for an in-depth understanding of the photophysics of multichromophore transition-metal complexes and for the design of external stimuli-responsive sensing materials, for instance, temperature or microenvironment sensing materials.
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Affiliation(s)
- Fangfang Zhong
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering , Dalian University of Technology , E-208 West Campus, 2 Ling Gong Road , Dalian 116024 , P. R. China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering , Dalian University of Technology , E-208 West Campus, 2 Ling Gong Road , Dalian 116024 , P. R. China
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13
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Yarnell JE, Chakraborty A, Myahkostupov M, Wright KM, Castellano FN. Long-lived triplet excited state in a platinum(ii) perylene monoimide complex. Dalton Trans 2018; 47:15071-15081. [PMID: 30303214 DOI: 10.1039/c8dt02496k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
We report the synthesis and solution based photophysical properties of a new Pt(ii)-terpyridine complex coupled to a perylene monoimide (PMI) chromophoric unit through an acetylene linkage. This structural arrangement resulted in quantitative quenching of the highly fluorescent PMI chromophore by introducing metal character into the lowest energy singlet state, thereby leading to the formation of a long-lived PMI-ligand localized triplet excited state (τ = 8.4 μs). Even though the phosphorescence from this triplet state was not observed, highly efficient quenching of this excited state by dissolved oxygen and the observation of singlet oxygen photoluminescence in the near-IR at 1270 nm initially pointed towards triplet excited state character. Additionally, the coincidence of the excited state absorbance difference spectra from the sensitized PMI ligand using a triplet donor and the Pt-PMI complex provided strong evidence for this triplet state assignment, which was further supported by TD-DFT calculations.
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Affiliation(s)
- James E Yarnell
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, USA.
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14
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Haque A, Al-Balushi RA, Al-Busaidi IJ, Khan MS, Raithby PR. Rise of Conjugated Poly-ynes and Poly(Metalla-ynes): From Design Through Synthesis to Structure-Property Relationships and Applications. Chem Rev 2018; 118:8474-8597. [PMID: 30112905 DOI: 10.1021/acs.chemrev.8b00022] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Conjugated poly-ynes and poly(metalla-ynes) constitute an important class of new materials with potential application in various domains of science. The key factors responsible for the diverse usage of these materials is their intriguing and tunable chemical and photophysical properties. This review highlights fascinating advances made in the field of conjugated organic poly-ynes and poly(metalla-ynes) incorporating group 4-11 metals. This includes several important aspects of conjugated poly-ynes viz. synthetic protocols, bonding, electronic structure, nature of luminescence, structure-property relationships, diverse applications, and concluding remarks. Furthermore, we delineated the future directions and challenges in this particular area of research.
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Affiliation(s)
- Ashanul Haque
- Department of Chemistry , Sultan Qaboos University , P.O. Box 36, Al-Khod 123 , Sultanate of Oman
| | - Rayya A Al-Balushi
- Department of Chemistry , Sultan Qaboos University , P.O. Box 36, Al-Khod 123 , Sultanate of Oman
| | - Idris Juma Al-Busaidi
- Department of Chemistry , Sultan Qaboos University , P.O. Box 36, Al-Khod 123 , Sultanate of Oman
| | - Muhammad S Khan
- Department of Chemistry , Sultan Qaboos University , P.O. Box 36, Al-Khod 123 , Sultanate of Oman
| | - Paul R Raithby
- Department of Chemistry , University of Bath , Claverton Down , Bath BA2 7AY , U.K
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15
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Chakraborty A, Yarnell JE, Sommer RD, Roy S, Castellano FN. Excited-State Processes of Cyclometalated Platinum(II) Charge-Transfer Dimers Bridged by Hydroxypyridines. Inorg Chem 2018; 57:1298-1310. [PMID: 29336558 DOI: 10.1021/acs.inorgchem.7b02736] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of four anti-disposed dinuclear platinum(II) complexes featuring metal-metal-to-ligand charge-transfer (MMLCT) excited states, bridged by either 2-hydroxy-6-methylpyridine or 2-hydroxy-6-phenylpyridine and cyclometalated with 7,8-benzoquinoline or 2-phenylpyridine, are presented. The 2-hydroxypyridine bridging ligands control intramolecular d8-d8 metal-metal σ interactions, affecting the frontier orbitals' electronic structure, resulting in marked changes to the ground- and excited-state properties of these complexes. Three of these molecules possess reversible one-electron oxidations in cyclic voltammetry experiments as a result of strong intramolecular metallophilic interactions. In this series of molecules, X-ray crystallography revealed Pt-Pt distances ranging between 2.815 and 2.878 Å; the former represents the shortest reported metal-metal distance for platinum(II) dimers possessing low-energy MMLCT transitions. All four molecules reported here display visible absorption bands beyond 500 nm and feature MMLCT-based red photoluminescence (PL) above 700 nm at room temperature with high PL quantum yields (up to 4%) and long excited-state lifetimes (up to 341 ns). The latter were recorded using both transient PL and transient absorption experiments that self-consistently yielded quantitatively identical excited-state lifetimes. The energy-gap law was successfully applied to this series of chromophores, documenting this behavior for the first time in molecules possessing MMLCT excited states. The combined data illustrate that entirely new classes of MMLCT chromophores can be envisioned using bridging pyridyl hydroxides in cooperation with various C^N cyclometalates to achieve photophysical properties suitable for excited-state electron- and energy-transfer chemistry.
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Affiliation(s)
- Arnab Chakraborty
- Department of Chemistry, North Carolina State University , Raleigh, North Carolina 27695-8204, United States
| | - James E Yarnell
- Department of Chemistry, North Carolina State University , Raleigh, North Carolina 27695-8204, United States
| | - Roger D Sommer
- Department of Chemistry, North Carolina State University , Raleigh, North Carolina 27695-8204, United States
| | - Subhangi Roy
- Department of Chemistry, North Carolina State University , Raleigh, North Carolina 27695-8204, United States
| | - Felix N Castellano
- Department of Chemistry, North Carolina State University , Raleigh, North Carolina 27695-8204, United States
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16
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Guo H, Zhu L, Dang C, Zhao J, Dick B. Synthesis and photophysical properties of ruthenium(ii) polyimine complexes decorated with flavin. Phys Chem Chem Phys 2018; 20:17504-17516. [DOI: 10.1039/c8cp02358a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Phosphorescent emission from a flavin localized triplet excited state (3IL) is observed for the first time in a flavin decorated tris(dipyridine) Ru(ii) complex with strong visible light absorption.
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Affiliation(s)
- Huimin Guo
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian
- P. R. China
| | - Lijuan Zhu
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian
- P. R. China
| | - Can Dang
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian
- P. R. China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian
- P. R. China
| | - Bernhard Dick
- Institut für Physikalische und Theoretische Chemie
- Universität Regensburg
- Regensburg
- Germany
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17
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Marineau-Plante G, Juvenal F, Langlois A, Fortin D, Soldera A, Harvey PD. Multiply “trapped” 3[trans-Pt(PR3)2(CCC6H4X)2]* conformers in rigid media. Chem Commun (Camb) 2018; 54:976-979. [DOI: 10.1039/c7cc09503a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The triplet emission exhibits multiple well-defined decays depending on the θ1 and θ2 values and environment in the crystal sites.
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Affiliation(s)
| | - Frank Juvenal
- Departement de chimie
- Université de Sherbrooke
- Sherbrooke
- Canada
| | - Adam Langlois
- Departement de chimie
- Université de Sherbrooke
- Sherbrooke
- Canada
| | - Daniel Fortin
- Departement de chimie
- Université de Sherbrooke
- Sherbrooke
- Canada
| | - Armand Soldera
- Departement de chimie
- Université de Sherbrooke
- Sherbrooke
- Canada
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18
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Chan KT, Tong GSM, To WP, Yang C, Du L, Phillips DL, Che CM. The interplay between fluorescence and phosphorescence with luminescent gold(i) and gold(iii) complexes bearing heterocyclic arylacetylide ligands. Chem Sci 2016; 8:2352-2364. [PMID: 28451340 PMCID: PMC5365001 DOI: 10.1039/c6sc03775e] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 12/03/2016] [Indexed: 01/02/2023] Open
Abstract
The photophysical properties of a series of gold(i) [LAu(C 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 1111111111111111111111111111111111 1111111111111111111111111111111111 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 1111111111111111111111111111111111 1111111111111111111111111111111111 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 1111111111111111111111111111111111 1111111111111111111111111111111111 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 0000000000000000000000000000000000 CR)] (L = PCy3 (1a-4a), RNC (5a), NHC (6a)) and gold(iii) complexes [Au(C^N^C)(CCR)] (1b-4b) bearing heterocyclic arylacetylide ligands with narrow band-gap are compared. The luminescence of both series are derived from an intraligand transition localized on the arylacetylide ligand (ππ*(CCR)) but 1a-3a displayed prompt fluorescence (τPF = 2.7-12.0 ns) while 1b-3b showed mainly phosphorescence (τPh = 104-205 μs). The experimentally determined intersystem crossing (ISC) rate constants (kISC) are on the order of 106 to 108 s-1 for the gold(i) series (1a-3a) but 1010 to 1011 s-1 for the gold(iii) analogues (1b-3b). DFT/TDDFT calculations have been performed to help understand the difference in the kISC between the two series of complexes. Owing to the different oxidation states of the gold ion, the Au(i) complexes have linear coordination geometry while the Au(iii) complexes are square planar. It was found from DFT/TDDFT calculations that due to this difference in coordination geometries, the energy gap between the singlet and triplet excited states (ΔEST) with effective spin-orbit coupling (SOC) for Au(i) systems is much larger than that for the Au(iii) counterparts, thus resulting in the poor ISC efficiency for the former. Time-resolved spectroscopies revealed a minor contribution (<2.9%) of a long-lived delayed fluorescence (DF) (τDF = 4.6-12.5 μs) to the total fluorescence in 1a-3a. Attempts have been made to elucidate the mechanism for the origins of the DF: the dependence of the DF intensity with the power of excitation light reveals that triplet-triplet annihilation (TTA) is the most probable mechanism for the DF of 1a while germinate electron-hole pair (GP) recombination accounts for the DF of 2a in 77 K glassy solution (MeOH/EtOH = 4 : 1). Both 4a and 4b contain a BODIPY moiety at the acetylide ligand and display only 1IL(ππ*) fluorescence with negligible phosphorescence being observed. Computational analyses attributed this observation to the lack of low-lying triplet excited states that could have effective SOC with the S1 excited state.
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Affiliation(s)
- Kaai Tung Chan
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China . ;
| | - Glenna So Ming Tong
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China . ;
| | - Wai-Pong To
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China . ;
| | - Chen Yang
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China . ;
| | - Lili Du
- Department of Chemistry , The University of Hong Kong , Hong Kong , China
| | - David Lee Phillips
- Department of Chemistry , The University of Hong Kong , Hong Kong , China
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China . ; .,Department of Chemistry , HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China
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19
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Liu R, Zhu S, Shi H, Hu J, Shu M, Liu J, Zhu H. Synthesis, structural characterization, opto-electrical properties of Ir(III) complexes with imidazolium-based carbene ligands. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.10.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Na H, Maity A, Teets TS. Postsynthetic Systematic Electronic Tuning of Organoplatinum Photosensitizers via Secondary Coordination Sphere Interactions. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00332] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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
| | - Ayan Maity
- 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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21
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Synthesis, characterization, photophysics and electrochemistry of hexanuclear silver(I) alkynyl phosphine complexes. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.02.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Bachmann M, Suter D, Blacque O, Venkatesan K. Tunable and Efficient White Light Phosphorescent Emission Based on Single Component N-Heterocyclic Carbene Platinum(II) Complexes. Inorg Chem 2016; 55:4733-45. [DOI: 10.1021/acs.inorgchem.5b02962] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael Bachmann
- Department of Chemistry, University of Zurich, Winterthurerstrasse
190, CH-8057, Zurich, Switzerland
| | - Dominik Suter
- Department of Chemistry, University of Zurich, Winterthurerstrasse
190, CH-8057, Zurich, Switzerland
| | - Olivier Blacque
- Department of Chemistry, University of Zurich, Winterthurerstrasse
190, CH-8057, Zurich, Switzerland
| | - Koushik Venkatesan
- Department of Chemistry, University of Zurich, Winterthurerstrasse
190, CH-8057, Zurich, Switzerland
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23
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Zhang Y, Cox JM, Friedman AE, Benedict JB, Cook TR. Phosphorescent organoplatinum(II) D2A2 metallacycles: synthesis, self-assembly, and photophysical properties. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1177824] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Yuzhen Zhang
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Jordan M. Cox
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Alan E. Friedman
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Jason B. Benedict
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Timothy R. Cook
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
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24
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Lu T, Wang C, Lystrom L, Pei C, Kilina S, Sun W. Effects of extending the π-conjugation of the acetylide ligand on the photophysics and reverse saturable absorption of Pt(ii) bipyridine bisacetylide complexes. Phys Chem Chem Phys 2016; 18:28674-28687. [DOI: 10.1039/c6cp02628a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Extending the acetylide ligand π-conjugation diminishes the terminal substituent effect on the lowest excited states, but expands the triplet excited-state absorption to the near-IR region.
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Affiliation(s)
- Taotao Lu
- Department of Chemistry and Biochemistry
- North Dakota State University
- Fargo
- USA
| | - Chengzhe Wang
- Department of Chemistry and Biochemistry
- North Dakota State University
- Fargo
- USA
| | - Levi Lystrom
- Department of Chemistry and Biochemistry
- North Dakota State University
- Fargo
- USA
| | - Chengkui Pei
- Department of Chemistry and Biochemistry
- North Dakota State University
- Fargo
- USA
| | - Svetlana Kilina
- Department of Chemistry and Biochemistry
- North Dakota State University
- Fargo
- USA
| | - Wenfang Sun
- Department of Chemistry and Biochemistry
- North Dakota State University
- Fargo
- USA
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25
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Liu R, Dandu N, McCleese C, Li Y, Lu T, Li H, Yost D, Wang C, Kilina S, Burda C, Sun W. Influence of a Naphthaldiimide Substituent at the Diimine Ligand on the Photophysics and Reverse Saturable Absorption of Pt
II
Diimine Complexes and Cationic Ir
III
Complexes. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500882] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Rui Liu
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108‐6050, USA, http://https://www.ndsu.edu/chemistry/people/faculty/sun.html
- Department of Applied Chemistry, College of Sciences, Nanjing Tech University, Nanjing 211816, P.R. China
| | - Naveen Dandu
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108‐6050, USA, http://https://www.ndsu.edu/chemistry/people/faculty/sun.html
| | - Christopher McCleese
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Yuhao Li
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108‐6050, USA, http://https://www.ndsu.edu/chemistry/people/faculty/sun.html
| | - Taotao Lu
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108‐6050, USA, http://https://www.ndsu.edu/chemistry/people/faculty/sun.html
| | - Hui Li
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108‐6050, USA, http://https://www.ndsu.edu/chemistry/people/faculty/sun.html
| | - Dillon Yost
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108‐6050, USA, http://https://www.ndsu.edu/chemistry/people/faculty/sun.html
| | - Chengzhe Wang
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108‐6050, USA, http://https://www.ndsu.edu/chemistry/people/faculty/sun.html
| | - Svetlana Kilina
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108‐6050, USA, http://https://www.ndsu.edu/chemistry/people/faculty/sun.html
| | - Clemens Burda
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Wenfang Sun
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108‐6050, USA, http://https://www.ndsu.edu/chemistry/people/faculty/sun.html
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26
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Fan Y, Zhao D. Triangular platinum(II) metallacycles: syntheses, photophysics, and nonlinear optics. ACS APPLIED MATERIALS & INTERFACES 2015; 7:6162-6171. [PMID: 25738555 DOI: 10.1021/am509074m] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Three triangular platinum(II) diimine metallacycles incorporating large cyclic oligo(phenylene-ethynylene) (OPE) bisacetylide ligands are synthesized, and their photophysical properties are studied. Two types of triplet excited states with ligand/metal-to-ligand charge-transfer and acetylide-ligand-centered characteristics respectively, are exhibited by these complexes depending on the size (conjugation length) and electronic features of the cyclic OPE ligands. When the energy levels of the two excited states are close to each other, the lowest triplet state is found to switch between the two in varied solvents, resulting from their relative energy inversion induced by solvent polarity change. Density functional theory and time-dependent density functional theory calculations provide corroborative evidence for such experimental conclusions. More importantly, the designed metallacycles show impressive two-photon absorption (2PA) and two-photon excitation phosphorescing abilities, and the 2PA cross section reaches 1020 GM at 680 nm and 670 GM at 1040 nm by two different metallacycles. Additionally, pronounced reverse saturable absorptions are observed with these metallacycles by virtue of their strong transient triplet-state absorptions.
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Affiliation(s)
- Yuanpeng Fan
- Beijing National Laboratory for Molecular Sciences, Department of Applied Chemistry, Center for Soft Matter Science and Engineering, the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Dahui Zhao
- Beijing National Laboratory for Molecular Sciences, Department of Applied Chemistry, Center for Soft Matter Science and Engineering, the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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27
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Wang CJ, Mao KL, Qiu GM, Huang S, Shan LH, Zhou XL, Zhang ZB, Wang YY. Ligand-Directed Assembly of Manganese and Zinc Complexes: Syntheses, Crystal Structures, and Bioactivities. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201400387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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28
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Liu R, Li Y, Chang J, Waclawik ER, Sun W. Pt(II) Bipyridyl Complexes Bearing Substituted Fluorenyl Motif on the Bipyridyl and Acetylide Ligands: Synthesis, Photophysics, and Reverse Saturable Absorption. Inorg Chem 2014; 53:9516-30. [DOI: 10.1021/ic500646r] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rui Liu
- Department
of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
| | - Yuhao Li
- Department
of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
| | - Jin Chang
- Science
and Engineering Faculty, Queensland University of Technology, 2 George
Street, Brisbane, Queensland 4000, Australia
| | - Eric R. Waclawik
- Science
and Engineering Faculty, Queensland University of Technology, 2 George
Street, Brisbane, Queensland 4000, Australia
| | - Wenfang Sun
- Department
of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
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29
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Blanco-Rodríguez AM, Kvapilová H, Sýkora J, Towrie M, Nervi C, Volpi G, Záliš S, Vlček A. Photophysics of Singlet and Triplet Intraligand Excited States in [ReCl(CO)3(1-(2-pyridyl)-imidazo[1,5-α]pyridine)] Complexes. J Am Chem Soc 2014; 136:5963-73. [DOI: 10.1021/ja413098m] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Ana María Blanco-Rodríguez
- School
of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
| | - Hana Kvapilová
- J.
Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-182 23 Prague, Czech Republic
| | - Jan Sýkora
- J.
Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-182 23 Prague, Czech Republic
| | - Michael Towrie
- Central
Laser Facility, STFC, , Rutherford Appleton Laboratory, Harwell Oxford
Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - Carlo Nervi
- Department
of Chemistry and NIS, University of Turin, Via P. Giuria 7, I-10125 Torino, Italy
| | - Giorgio Volpi
- Department
of Chemistry and NIS, University of Turin, Via P. Giuria 7, I-10125 Torino, Italy
| | - Stanislav Záliš
- J.
Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-182 23 Prague, Czech Republic
| | - Antonín Vlček
- School
of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
- J.
Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-182 23 Prague, Czech Republic
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30
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Liu XG, Sun W. Synthesis, Photophysics, and Reverse Saturable Absorption of Bipyridyl Platinum(II) Bis(acetylide) Complexes Bearing Aromatic Electron-Withdrawing Substituents on the Acetylide Ligands. J Phys Chem A 2014; 118:10318-25. [DOI: 10.1021/jp500397g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xu-Guang Liu
- Department
of Chemistry and
Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
| | - Wenfang Sun
- Department
of Chemistry and
Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
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31
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Sazanovich IV, Best J, Scattergood PA, Towrie M, Tikhomirov SA, Bouganov OV, Meijer AJHM, Weinstein JA. Ultrafast photoinduced charge transport in Pt(ii) donor–acceptor assembly bearing naphthalimide electron acceptor and phenothiazine electron donor. Phys Chem Chem Phys 2014; 16:25775-88. [DOI: 10.1039/c4cp03995e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Pt(ii)-based molecular triad engages in step-wise photoinduced charge-separation; the charge recombination occurs through-space via two distinct pathways.
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Affiliation(s)
- Igor V. Sazanovich
- Department of Chemistry
- University of Sheffield
- Sheffield, UK
- Central Laser Facility
- Research Complex at Harwell
| | - Jonathan Best
- Department of Chemistry
- University of Sheffield
- Sheffield, UK
| | | | - Michael Towrie
- Central Laser Facility
- Research Complex at Harwell
- STFC Rutherford Appleton Laboratory
- Harwell Science and Innovation Campus
- Chilton, UK
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32
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Liu R, Dandu N, Li Y, Kilina S, Sun W. Synthesis, photophysics and reverse saturable absorption of bipyridyl platinum(II) bis(arylfluorenylacetylide) complexes. Dalton Trans 2013; 42:4398-409. [PMID: 23338679 DOI: 10.1039/c2dt32153j] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of Pt(II) bipyridyl complexes with different aryl substituents (Ar = naphthyl (1a), anthryl (1b), pyrenyl (1c) and phenothiazyl (1d)) on the fluorenylacetylide ligands are synthesized and investigated. The influence of the aryl substituent on the photophysics of these complexes is systematically investigated by spectroscopic methods and simulated by time dependent density functional theory (TD-DFT). All complexes exhibit ligand-centered (1)π,π* transitions significantly admixed with the metal-to-ligand charge transfer ((1)MLCT)/ligand-to-ligand charge transfer ((1)LLCT) transitions in the UV and blue spectral region, and broad, structureless (1)MLCT/(1)LLCT absorption bands in the visible spectral region. All complexes are emissive in solution at room temperature, with the fluorescence originating predominantly from the (1)MLCT/(1)LLCT states. The triplet emitting state is dominated by the (3)π,π* state localized on the fluorenylacetylide motif and mixed with some (3)ML'CT character (metal-to-fluorenylacetylide ligand charge transfer) for 1a, 1b and 1d. For 1c, the phosphorescence predominantly originates from the pyrene localized (3)π,π* state. The variation in the photophysical properties is related to the twisting angle of the aryl substituent from the fluorenyl plane, which defines the conjugation between the substituents and fluorenylacetylide ligands and, consequently, alters the energy and intensity of absorption and emission in these complexes. also exhibit broadband triplet excited-state absorption in the visible spectral region. Therefore, they show strong reverse saturable absorption at 532 nm for nanosecond laser pulses as demonstrated by the nonlinear transmission experiment.
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Affiliation(s)
- Rui Liu
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND 58108-6050, USA
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33
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Li Y, Dandu N, Liu R, Hu L, Kilina S, Sun W. Nonlinear absorbing cationic iridium(III) complexes bearing benzothiazolylfluorene motif on the bipyridine (N∧N) ligand: synthesis, photophysics and reverse saturable absorption. ACS APPLIED MATERIALS & INTERFACES 2013; 5:6556-6570. [PMID: 23763472 DOI: 10.1021/am401133p] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Four new heteroleptic cationic Ir(III) complexes bearing benzothiazolylfluorene motif on the bipyridine (N∧N) (1 and 2) and phenylpyridine (C∧N) (3 and 4) ligands are synthesized and characterized. The influence of the position of the substituent and the extent of π-conjugation on the photophysics of these complexes is systematically investigated by spectroscopic methods and simulated by time-dependent density functional theory (TDDFT). The complexes exhibit ligand-centered (1)π,π* transitions with admixtures of (1)ILCT (π(benzothiazolylfluorene) → π*(bpy)) and (1)MLCT (metal-to-ligand charge transfer) characters below 475 nm, and very weak (1,3)MLCT and (1,3)LLCT (ligand-to-ligand charge transfer) transitions above 475 nm. The emission of these complexes at room temperature in CH2Cl2 solutions is ascribed to be predominantly from the (3)MLCT/(3)LLCT states for 1 and from the (3)π,π* state for 2, while the emitting state of 3 and 4 are assigned to be an admixture of (3)MLCT, (3)LLCT, and (3)π,π* characters. The variations of the photophysical properties of 1-4 are attributed to different degrees of π-conjugation in the bipyridine and phenylpyridine ligands induced by different positions of the benzothiazolylfluorenyl substituents on the bipyridine ligand and different extents of π-conjugation in the phenylpyridine ligands, which alters the energy and lifetime of the lowest singlet and triplet excited states. 1-4 all possess broadband transient absorption (TA) upon nanosecond laser excitation, which extends from the visible to the NIR region. Therefore, 1-4 all exhibit strong reverse saturable absorption (RSA) at 532 nm for ns laser pulses. However, the TA of complexes 1, 2, and 3 are much stronger than that of 4. This feature, combined with the difference in ground-state absorption and triplet excited-state quantum yield, result in the difference in RSA strength, which follows this trend: 1 ≈ 2 ≈ 3 > 4. Therefore, complexes 1-3 are strong reverse saturable absorbers at 532 nm and could potentially be used as broadband nonlinear absorbing materials.
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Affiliation(s)
- Yuhao Li
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
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Chakraborty A, Deaton JC, Haefele A, Castellano FN. Charge-Transfer and Ligand-Localized Photophysics in Luminescent Cyclometalated Pyrazolate-Bridged Dinuclear Platinum(II) Complexes. Organometallics 2013. [DOI: 10.1021/om400276v] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Arnab Chakraborty
- Department of Chemistry
and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United
States
| | - Joseph C. Deaton
- Department of Chemistry
and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United
States
| | - Alexandre Haefele
- Department of Chemistry
and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United
States
| | - Felix N. Castellano
- Department of Chemistry
and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United
States
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35
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Chen JS, Zhao GJ, Cook TR, Han KL, Stang PJ. Photophysical Properties of Self-Assembled Multinuclear Platinum Metallacycles with Different Conformational Geometries. J Am Chem Soc 2013; 135:6694-702. [DOI: 10.1021/ja402421w] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jun-Sheng Chen
- State Key Laboratory of Molecular
Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s
Republic of China
- University of the Chinese Academy of Sciences, Beijing 100049, People’s
Republic of China
| | - Guang-Jiu Zhao
- State Key Laboratory of Molecular
Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s
Republic of China
| | - Timothy R. Cook
- Department
of Chemistry, University of Utah, Salt
Lake City, Utah 84112, United
States
| | - Ke-Li Han
- State Key Laboratory of Molecular
Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s
Republic of China
| | - Peter J. Stang
- Department
of Chemistry, University of Utah, Salt
Lake City, Utah 84112, United
States
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36
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Liu R, Azenkeng A, Zhou D, Li Y, Glusac KD, Sun W. Tuning Photophysical Properties and Improving Nonlinear Absorption of Pt(II) Diimine Complexes with Extended π-Conjugation in the Acetylide Ligands. J Phys Chem A 2013; 117:1907-17. [DOI: 10.1021/jp309841x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Rui Liu
- Department of Chemistry and
Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
| | - Alexander Azenkeng
- Energy and Environmental Research
Center, University of North Dakota, Grand
Forks, North Dakota 58202-9018, United States
| | - Dapeng Zhou
- Department of Chemistry, Bowling Green State University, Bowling Green, Ohio
43403-0001, United States
| | - Yuhao Li
- Department of Chemistry and
Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
| | - Ksenija D. Glusac
- Department of Chemistry, Bowling Green State University, Bowling Green, Ohio
43403-0001, United States
| | - Wenfang Sun
- Department of Chemistry and
Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
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37
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Berenguer JR, Fernández J, Lalinde E, Sánchez S. New Trans-Configured Acetylide–Cyanide Platinum(II) Anions: Spectroscopic and Optical Studies. Organometallics 2013. [DOI: 10.1021/om301134k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jesús R. Berenguer
- Departamento de
Quı́mica−Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, 26006 Logroño, Spain
| | - Julio Fernández
- Departamento de
Quı́mica−Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, 26006 Logroño, Spain
| | - Elena Lalinde
- Departamento de
Quı́mica−Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, 26006 Logroño, Spain
| | - Sergio Sánchez
- Departamento de
Quı́mica−Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, 26006 Logroño, Spain
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38
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Liu R, Chen H, Chang J, Li Y, Zhu H, Sun W. Pt(ii) diimine complexes bearing carbazolyl-capped acetylide ligands: synthesis, tunable photophysics and nonlinear absorption. Dalton Trans 2013; 42:160-71. [DOI: 10.1039/c2dt31869e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Charge-separated excited states in platinum(II) chromophores: Photophysics, formation, stabilization and utilization in solar energy conversion. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.07.010] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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40
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Nonlinear Absorbing Platinum(II) Diimine Complexes: Synthesis, Photophysics, and Reverse Saturable Absorption. Chemistry 2012; 18:11440-8. [DOI: 10.1002/chem.201200254] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Revised: 05/18/2012] [Indexed: 11/07/2022]
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Vapor-controlled linkage isomerization of a vapochromic bis(thiocyanato)platinum(II) complex: new external stimuli to control isomerization behavior. Inorg Chem 2012; 51:7508-19. [PMID: 22734825 DOI: 10.1021/ic202734f] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We synthesized a novel Pt(II)-diimine complex with a typical ambidentate thiocyanato ligand, [Pt(thiocyanato)(2)(H(2)dcbpy)] (1; H(2)dcbpy =4,4'-dicarboxy-2,2'-bipyridine), and found that the complex 1 exhibits unique linkage isomerizations with drastic color and luminescence changes driven by exposure to volatile organic chemical (VOC) vapors in the solid state. Reaction between [PtCl(2)(H(2)dcbpy)] and KSCN in aqueous solution at 0 °C enabled successful isolation of an isomer with the S-coordinated thiocyanato ligand, [Pt(SCN)(2)(H(2)dcbpy)] (1SS·H(2)O), as a nonluminescent orange solid. Interestingly, 1SS·H(2)O was isomerized completely to one isomer with the N-coordinated isothiocyanato ligand, [Pt(NCS)(2)(H(2)dcbpy)] (1NN·3DMF) by exposure to DMF vapor, and this isomerization was accompanied by significant color and luminescence changes from nonluminescent orange to luminescent red. IR spectroscopy and thermogravimetric analysis revealed that adsorption of the DMF vapor and transformation of the hydrogen-bonded structure both played important roles in this vapor-induced linkage isomerization. Another isomer containing both S- and N-coordinated thiocyanato ligands, [Pt(SCN)(NCS)(H(2)dcbpy)] (1SN), was obtained as a nonluminescent yellow solid simply by exposure of 1SS·H(2)O to acetone vapor at room temperature, and about 80% of 1SS·H(2)O was found to be converted to 1SN. In the solution state, each isomer changed gradually to an isomeric mixture, but pure 1SS was regenerated by UV light irradiation (λ(irr.) = 300 nm) of an MeOH solution of the mixture. In the crystal structure of 1SN, the complex molecules were hydrogen-bonded to each other through the carboxyl groups of the H(2)dcbpy ligand and the N site of the thiocyanato ligand, whereas the 1NN molecules in the 1NN·4DMF crystal were hydrogen-bonded to the solvated DMF molecules. Competition of the hydrogen-bonding ability among the carboxyl groups of the H(2)dcbpy ligand, N and S atoms of the thiocyanato ligand, and the vapor molecule was found to be one of the most important factors controlling linkage isomerization behavior in the solid state. This unique linkage isomerization controlled by vapor can provide an outstanding vapochromic system as well as a new molecular switching function driven by vapor molecules.
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42
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Liu Y, Li Q, Zhao J, Guo H. BF2-bound chromophore-containing N⁁NPt(ii) bisacetylide complex and its application as sensitizer for triplet–triplet annihilation based upconversion. RSC Adv 2012. [DOI: 10.1039/c1ra00434d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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43
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Wu W, Guo H, Wu W, Ji S, Zhao J. Long-Lived Room Temperature Deep-Red/Near-IR Emissive Intraligand Triplet Excited State (3IL) of Naphthalimide in Cyclometalated Platinum(II) Complexes and Its Application in Upconversion. Inorg Chem 2011; 50:11446-60. [PMID: 22029396 DOI: 10.1021/ic201254w] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Wenting Wu
- State Key Laboratory of Fine Chemicals, School of Chemical
Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian 116024, China
| | - Huimin Guo
- State Key Laboratory of Fine Chemicals, School of Chemical
Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian 116024, China
| | - Wanhua Wu
- State Key Laboratory of Fine Chemicals, School of Chemical
Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian 116024, China
| | - Shaomin Ji
- State Key Laboratory of Fine Chemicals, School of Chemical
Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian 116024, China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals, School of Chemical
Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling Gong Road, Dalian 116024, China
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44
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Hudson ZM, Wang S. Metal-containing triarylboron compounds for optoelectronic applications. Dalton Trans 2011; 40:7805-16. [PMID: 21603687 DOI: 10.1039/c1dt10292c] [Citation(s) in RCA: 166] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Triarylboranes have recently emerged as a powerful new class of electron acceptors with great potential as optoelectronic materials. The empty p(z) orbital on the boron centre promotes strong charge-transfer transitions, leading to highly luminescent compounds with colors spanning the entire visible spectrum. Due to intense research efforts over the past decade, many examples now exist of organic molecules based on this structural motif. Only recently, however, have transition metal-containing triarylboranes been closely investigated. These compounds are capable of bright luminescence from a triplet excited state, and have been developed as efficient emissive materials for organic light-emitting diodes (OLEDs) as a result. In addition, their long-lived phosphorescence gives these materials potential as highly selective chemical sensors for small anions using time-gated detection, eliminating interference from background fluorescence. The research of the past several years has now led to a better understanding of the impact of the triarylboron group on the photophysical properties of metal complexes, which we expect will provide many opportunities for research into this class of functional phosphorescent materials.
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Affiliation(s)
- Zachary M Hudson
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6
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45
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Hudson ZM, Sun C, Harris KJ, Lucier BEG, Schurko RW, Wang S. Probing the Structural Origins of Vapochromism of a Triarylboron-Functionalized Platinum(II) Acetylide by Optical and Multinuclear Solid-State NMR Spectroscopy. Inorg Chem 2011; 50:3447-57. [DOI: 10.1021/ic102349h] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zachary M. Hudson
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6
| | - Christina Sun
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6
| | - Kristopher J. Harris
- Department of Chemistry & Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, Canada N9B 3P4
| | - Bryan E. G. Lucier
- Department of Chemistry & Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, Canada N9B 3P4
| | - Robert W. Schurko
- Department of Chemistry & Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, Canada N9B 3P4
| | - Suning Wang
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6
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46
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Chan CKM, Tao CH, Li KF, Man-Chung Wong K, Zhu N, Cheah KW, Yam VWW. Synthesis, characterization, luminescence and nonlinear optical (NLO) properties of truxene-containing platinum(II) alkynyl complexes. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.09.044] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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47
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Sun H, Guo H, Wu W, Liu X, Zhao J. Coumarin phosphorescence observed with N⁁N Pt(ii) bisacetylide complex and its applications for luminescent oxygen sensing and triplet–triplet-annihilation based upconversion. Dalton Trans 2011; 40:7834-41. [DOI: 10.1039/c1dt10490j] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Goeb S, Prusakova V, Wang X, Vézinat A, Sallé M, Castellano FN. Phosphorescent self-assembled PtII tetranuclear metallocycles. Chem Commun (Camb) 2011; 47:4397-9. [DOI: 10.1039/c1cc10239g] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Mancilha FS, Barloy L, Rodembusch FS, Dupont J, Pfeffer M. Cyclopalladated complexes of 4-aryl-2,1,3-benzothiadiazoles: new emitters in solution at room temperature. Dalton Trans 2011; 40:10535-44. [DOI: 10.1039/c1dt10666j] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Wu W, Sun J, Ji S, Wu W, Zhao J, Guo H. Tuning the emissive triplet excited states of platinum(ii) Schiff base complexes with pyrene, and application for luminescent oxygen sensing and triplet–triplet-annihilation based upconversions. Dalton Trans 2011; 40:11550-61. [DOI: 10.1039/c1dt11001b] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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