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Gupta R, Negi A, Pal AK. A Bichromophoric Approach to Induce Luminescence - A Blend of Experimental and Theoretical Studies. Chem Asian J 2024; 19:e202400270. [PMID: 38742860 DOI: 10.1002/asia.202400270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2024] [Revised: 05/11/2024] [Accepted: 05/14/2024] [Indexed: 05/16/2024]
Abstract
Two homoleptic terpyridyl complexes of Ru(II), 1 and Fe(II), 2 were synthesized using a ligand L1 that contained a phenyl spacer between an anthracenyl (An) and a terpyridyl (tpy) moiety. An equilibrated-bichromophoric strategy was adopted to induce photoluminescence in 1 and 2. A glimpse into the excited state photophysical properties of 1 and 2 revealed that 1 exhibited NIR emission at ~700 nm with an excited state lifetime components of 1.33 and 6.52 ns. On the other hand, 2 was found to be non-luminescent. The origin of emission in case of 1 was attributed to the effect of phenyl spacer which rendered the 3An state to be nearly isoenergetic to the emissive 3MLCT state of 1 facilitating 3MLCT-3An equilibrium. This fact was supported by experimental (photocurrent generation) and theoretical (potential energy diagram) evidences.
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Affiliation(s)
- Rahat Gupta
- Department of Chemistry, Indian Institute of Technology Jammu, Nagrota Bypass Road, Jammu and Kashmir, 181221, India
| | - Anshul Negi
- Department of Chemistry, Indian Institute of Technology Jammu, Nagrota Bypass Road, Jammu and Kashmir, 181221, India
| | - Amlan K Pal
- Department of Chemistry, Indian Institute of Technology Jammu, Nagrota Bypass Road, Jammu and Kashmir, 181221, India
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2
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Trippmacher S, Demeshko S, Prescimone A, Meyer F, Wenger OS, Wang C. Ferromagnetically Coupled Chromium(III) Dimer Shows Luminescence and Sensitizes Photon Upconversion. Chemistry 2024; 30:e202400856. [PMID: 38523568 DOI: 10.1002/chem.202400856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 03/26/2024]
Abstract
There has been much progress on mononuclear chromium(III) complexes featuring luminescence and photoredox activity, but dinuclear chromium(III) complexes have remained underexplored in these contexts until now. We identified a tridentate chelate ligand able to accommodate both meridional and facial coordination of chromium(III), to either access a mono- or a dinuclear chromium(III) complex depending on reaction conditions. This chelate ligand causes tetragonally distorted primary coordination spheres around chromium(III) in both complexes, entailing comparatively short excited-state lifetimes in the range of 400 to 800 ns in solution at room temperature and making photoluminescence essentially oxygen insensitive. The two chromium(III) ions in the dimer experience ferromagnetic exchange interactions that result in a high spin (S=3) ground state with a coupling constant of +9.3 cm-1. Photoinduced energy transfer from the luminescent ferromagnetically coupled dimer to an anthracene derivative results in sensitized triplet-triplet annihilation upconversion. Based on these proof-of-principle studies, dinuclear chromium(III) complexes seem attractive for the development of fundamentally new types of photophysics and photochemistry enabled by magnetic exchange interactions.
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Affiliation(s)
- Simon Trippmacher
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Serhiy Demeshko
- Institute of Inorganic Chemistry, University of Göttingen, Tammannstraße 4, 37077, Göttingen, Germany
| | - Alessandro Prescimone
- Department of Chemistry, BPR 1096, University of Basel, Mattenstrasse 24a, 4058, Basel, Switzerland
| | - Franc Meyer
- Institute of Inorganic Chemistry, University of Göttingen, Tammannstraße 4, 37077, Göttingen, Germany
| | - Oliver S Wenger
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
| | - Cui Wang
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel, Switzerland
- Department of Biology and Chemistry, Osnabrück University, Barbarastraße 7, 49076, Osnabrück, Germany
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3
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Gupta R, Schott O, Saha A, Shriya, Hanan GS, Pal AK. Pt(II)-bis(quinolinyl) complexes for photocatalytic hydrogen production. Chem Commun (Camb) 2024; 60:2022-2025. [PMID: 38112657 DOI: 10.1039/d3cc04332k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Three Pt(II)-bis(quinolinyl) complexes with varying electron densities were synthesized, structurally characterized and used for photocatalytic hydrogen production under different conditions. All the complexes were found to be active for hydrogen production giving a maximum turnover number (TON) of 1230 surpassing the conventionally used Pt-terpyridyl complexes.
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Affiliation(s)
- Rahat Gupta
- Department of Chemistry, Indian Institute of Technology Jammu, Nagrota Bypass Road, Jammu and Kashmir - 181221, India.
| | - Olivier Schott
- Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Arindam Saha
- Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Shriya
- Department of Chemistry, Indian Institute of Technology Jammu, Nagrota Bypass Road, Jammu and Kashmir - 181221, India.
| | - Garry S Hanan
- Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Amlan K Pal
- Department of Chemistry, Indian Institute of Technology Jammu, Nagrota Bypass Road, Jammu and Kashmir - 181221, India.
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4
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Sun Y, Zhan F, Huang D, Wang X, Dou L, Xu K, Yang YF, Li G, She Y. 8-Phenylquinoline-Based Tetradentate 6/6/6 Platinum(II) Complexes for Near-Infrared Emitters. Inorg Chem 2023; 62:13156-13164. [PMID: 37531143 DOI: 10.1021/acs.inorgchem.3c02356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
A series of novel tetradentate 6/6/6 Pt(II) complexes containing an 8-phenylquinoline-benzo[d]imidazole-carbazole ligand was designed; the Pt(II) complexes could be synthesized by metalizing the corresponding ligand with K2PtCl4 in high isolated yields of 60-90%. Experimental and theoretical studies suggested that the ligand modification of the quinoline moieties of the Pt(II) complexes could tune their electrochemical, photophysical, and excited-state properties. Notably, all the Pt(II) complexes exhibited highly electrochemical stabilities with reversible redox processes except the quasi-reversible reduction of PtYL3. The large π-conjugation of the ligand together with increased metal-to-ligand charge-transfer (3MLCT) characters in T1 states enabled the Pt(II) complexes to show broad Gaussian-type NIR emission spectra with high photoluminescence quantum efficiencies of 1.2-1.5% and short τ of 0.8-1.5 μs in dichloromethane at room temperature. This work should provide a valuable reference for the design and development of monomer NIR emitters.
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Affiliation(s)
- Yulu Sun
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Feng Zhan
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Disheng Huang
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Xia Wang
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Lijie Dou
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Kewei Xu
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Yun-Fang Yang
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Guijie Li
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
| | - Yuanbin She
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China
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Fricker AE, Samolova E, Rheingold AL, Green DB, Brereton KR, Fritsch JM. Synthesis, spectroscopy, and crystallography of magnesium, aluminum, and zinc complexes supported by a tridentate ketoiminate. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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Lozada IB, Williams JAG, Herbert DE. Platinum( ii) complexes of benzannulated N ∧N −∧O-amido ligands: bright orange phosphors with long-lived excited states. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01120k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Benzannulated N∧N−∧O-chelating ligands enable facile formation of remarkably bright orange-emitting Pt(ii) phosphors with very long-lived excited states.
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Affiliation(s)
- Issiah B. Lozada
- Department of Chemistry and the Manitoba Institute for Materials, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba, R3T 2N2, Canada
| | | | - David E. Herbert
- Department of Chemistry and the Manitoba Institute for Materials, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba, R3T 2N2, Canada
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Ortiz RJ, Braun JD, Williams JAG, Herbert DE. Brightly Luminescent Platinum Complexes of N∧C-∧N Ligands Forming Six-Membered Chelate Rings: Offsetting Deleterious Ring Size Effects Using Site-Selective Benzannulation. Inorg Chem 2021; 60:16881-16894. [PMID: 34730936 DOI: 10.1021/acs.inorgchem.1c02551] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Brightly emissive platinum(II) complexes (λemission,max = 607-612 nm) of the type RLPtCl are reported, where RL is a cyclometalated N∧C-∧N-coordinating ligand derived from 1,3-di(2-trifluoromethyl-4-phenanthridinyl)benzene (CF3LH) or 1,3-di(2-tert-butyl-4-phenanthridinyl)benzene (tBuLH). Metathesis of the chlorido ligand can be achieved under mild conditions, enabling isolation of ionic compounds with the formula [CF3LPtL']PF6 where L' = pyridine or (4-dimethylamino)pyridine (DMAP), as well as the charge-neutral species tBuLPt(C≡C─C6H4─tBu) (C≡C─C6H4─tBu = 4-tert-butylphenylacetylido). Compared with N∧N∧N-ligated Pt(II) complexes that form 5-membered chelates, these compounds all contain 6-membered rings. Expanding the chelate ring size from 5 to 6 has been previously demonstrated to enhance emission in some N∧N∧N-coordinated Pt(II) species─for example, in complexes of 2,6-di(8-quinolinyl)pyridine vs those of 2,2':6',2″-terpyridine─but in related N∧C-∧N-coordinated species, luminescence quantum yields are significantly lower for the 6-membered chelate ring complexes. Here, we demonstrate that site-selective benzannulation of the quinolinyl side-arms can offset the deleterious effect of changing the chelate ring-size and boost photophysical properties such as the quantum yield. Density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations suggest that benzannulation counterintuitively destabilizes the emissive triplet states compared to the smaller π-system, with the "imine-bridged biphenyl" form of the phenanthridinyl arm helping to buffer against larger molecular distortions, enhancing photoluminescence quantum yields up to 0.09 ± 0.02. The spontaneous formation under aerated conditions of a Pt(IV) derivative (CF3LPtCl3) is also reported, together with its molecular structure in the solid state.
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Affiliation(s)
- Robert J Ortiz
- Department of Chemistry and the Manitoba Institute for Materials, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
| | - Jason D Braun
- Department of Chemistry and the Manitoba Institute for Materials, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
| | | | - David E Herbert
- Department of Chemistry and the Manitoba Institute for Materials, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
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8
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Synthesis, structures and luminescence properties of N^C^N-coordinated platinum(II) complexes based on an anthracene core: A red shift and a twist. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115401] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Scoditti S, Dabbish E, Russo N, Mazzone G, Sicilia E. Anticancer Activity, DNA Binding, and Photodynamic Properties of a N∧C∧N-Coordinated Pt(II) Complex. Inorg Chem 2021; 60:10350-10360. [PMID: 34170132 DOI: 10.1021/acs.inorgchem.1c00822] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the effort to discover new targets and improve the therapeutic efficacy of metal-containing anticancer compounds, transition metal complexes that can elicit cytotoxicity when irradiated with light of a proper wavelength and, then, candidates as potential photosensitizers for photodynamic therapy are actively being investigated. In this work, the cytotoxicity in the dark and the photophysical properties of the complex Pt(N∧C∧N)Cl, where the N∧C∧N ligand is 2,6-dipyrido-4-methyl-benzene chloride, are investigated in detail by means of a series of theoretical levels, that is density functional theory and its time-dependent extension together with molecular dynamics (MD) simulations. In the dark, cytotoxicity has been explored by simulating the steps of the mechanism of action of classical Pt(II) complexes. The suitability of the investigated complex to act as a photosensitizer has been verified by calculating spectroscopic properties for both the unperturbed complex and its aquated and guanine-bound forms. Furthermore, using MD simulation outcomes as a starting point, the photophysical properties of DNA-intercalated and -bound complexes have been evaluated with the goal of establishing how intercalation and binding affect sensitization activity.
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Affiliation(s)
- Stefano Scoditti
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Eslam Dabbish
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Nino Russo
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Gloria Mazzone
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy
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10
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Galimova MF, Begaliev TA, Zueva EM, Kondrashova SA, Latypov SK, Dobrynin AB, Kolesnikov IE, Musin RR, Musina EI, Karasik AA. Platinum(II) Complexes with 10-(Aryl)phenoxarsines: Synthesis, Cis/Trans Isomerization, and Luminescence. Inorg Chem 2021; 60:6804-6812. [PMID: 33886298 DOI: 10.1021/acs.inorgchem.1c00672] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Synthesis and structural and photophysical characterization of platinum dihalogenide complexes formulated as [PtHal2L2], where Hal = Cl and I, with different 10-(aryl)phenoxarsine ligands such as 10-(p-chlorophenyl)phenoxarsine, 10-(p-tolyl)phenoxarsine, and 10-(phenyl)phenoxarsine are reported. The structures of complexes were determined by NMR spectroscopy, mass spectrometry, and X-ray analysis. Cis/trans isomerism of the complexes in solution was studied by NMR spectroscopy. In the solid state, under UV irradiation, platinum diiodide trans complexes exhibit an intense orange-red emission, which was attributed to a metal halide-centered triplet state. The UV/vis absorption and emission properties were studied and rationalized by density functional theory (DFT) and time-dependent DFT calculations.
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Affiliation(s)
- Milyausha F Galimova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences (RAS), 8 Arbuzov Street, 420088 Kazan, Russian Federation
| | - Temurbek A Begaliev
- Kazan National Research Technological University, 68 K. Marx Street, 420015 Kazan, Russian Federation
| | - Ekaterina M Zueva
- Kazan National Research Technological University, 68 K. Marx Street, 420015 Kazan, Russian Federation
| | - Svetlana A Kondrashova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences (RAS), 8 Arbuzov Street, 420088 Kazan, Russian Federation
| | - Shamil K Latypov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences (RAS), 8 Arbuzov Street, 420088 Kazan, Russian Federation
| | - Alexey B Dobrynin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences (RAS), 8 Arbuzov Street, 420088 Kazan, Russian Federation
| | - Ilya E Kolesnikov
- Center for Optical and Laser Materials Research, Saint Petersburg State University, 5 Ulianovskaya Street, 198504 Saint Petersburg, Russian Federation
| | - Rustem R Musin
- Kazan National Research Technological University, 68 K. Marx Street, 420015 Kazan, Russian Federation
| | - Elvira I Musina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences (RAS), 8 Arbuzov Street, 420088 Kazan, Russian Federation
| | - Andrey A Karasik
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences (RAS), 8 Arbuzov Street, 420088 Kazan, Russian Federation
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11
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Wekesa IM, Jaganyi D. The electronic effect of quinoline moieties on the lability of platinum(II) complexes of tridentate N^N^N and N^C^N ligands: a kinetic, mechanistic and theoretical analysis. TRANSIT METAL CHEM 2021. [DOI: 10.1007/s11243-021-00454-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Puttock EV, Sturala J, Kistemaker JCM, Williams JAG. Platinum(II) Complexes of Tridentate ‐Coordinating Ligands Based on Imides, Amides, and Hydrazides: Synthesis and Luminescence Properties. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Emma V. Puttock
- Department of Chemistry Durham University DH1 3LE, U.K. Durham
| | - Jiri Sturala
- Department of Inorganic Chemistry University of Chemistry and Technology Prague Technicka 5 166 28 Prague 6 Czech Republic
| | - Jos C. M. Kistemaker
- Centre for Organic Photonics and Electronics The School of Chemistry and Molecular Biosciences University of Queensland 4072 Queensland Australia
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13
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Controlling the reactivity of [Pd (II)(N^N^N)Cl] + complexes using 2,6-bis(pyrazol-2-yl)pyridine ligands for biological application: Substitution reactivity, CT-DNA interactions and in vitro cytotoxicity study. J Inorg Biochem 2020; 213:111261. [PMID: 33011625 DOI: 10.1016/j.jinorgbio.2020.111261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 09/09/2020] [Accepted: 09/21/2020] [Indexed: 12/24/2022]
Abstract
Four [(N^N^N)Pd(II)Cl]+ complexes [chloride-(2,2':6',2''-terpyridine)Pd(II)]Cl (PdL1), [chlorido(2,6-bis(N-pyrazol-2-yl)pyridine)Pd(II)]Cl (PdL2), [chlorido(2,6-bis(3,5-dimethyl-N-pyrazol-2-yl)pyridine)Pd(II)]Cl (PdL3) and [chlorido(2,6-bis(3,5-dimethyl-N-pyrazol-2-ylmethyl)pyridine)Pd(II)]BF4 (PdL4) were synthesized and characterized. The rates of substitution of these Pd(II) complexes with thiourea nucleophiles viz; thiourea (Tu), N,N'-dimethylthiourea (Dmtu) and N,N,N',N'-tetramethylthiourea (Tmtu) was investigated under pseudo first-order conditions as a function of nucleophile concentration [Nu] and temperature using the stopped-flow technique. The observed rate constants vary linearly with [Nu]; kobs = k2[Nu] and decreased in the order: PdL1 > PdL2 > PdL3 ≫ PdL4. The lower π-acceptability of the cis-coordinated N-pyrazol-2-yl groups (which coordinates via pyrazollic-N π-donor atoms) of the PdL2-4 significantly decelerates the reactivity relative to PdL1. Furthermore, the six-membered chelates having methylene bridge in PdL4 do not allow π-extension in the ligand and introduces steric hindrance further lowering the reactivity. Trends in DFT calculated data supported the observed reactivity trend. Spectrophotometric titration data of complexes with calf thymus DNA (CT-DNA) and viscosity measurements of the resultant mixtures suggested that associative interactions occur between the complexes and CT-DNA, likely through groove binding with high binding constants (Kb = 104 M-1). In vitro MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] cytotoxic activity data showed that PdL1 was the most potent complex against MCF7 breast cancer cells; its IC50 value is lower than that of cisplatin. The results demonstrate how modification of a spectator ligand can be used to slow down the reactivity of Pd(II) complexes. This is of special importance in controlling drug toxicity in both pharmaceutical and biomedical applications.
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14
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Chen K, Hussain M, Razi SS, Hou Y, Yildiz EA, Zhao J, Yaglioglu HG, Donato MD. Anthryl-Appended Platinum(II) Schiff Base Complexes: Exceptionally Small Stokes Shift, Triplet Excited States Equilibrium, and Application in Triplet-Triplet-Annihilation Upconversion. Inorg Chem 2020; 59:14731-14745. [PMID: 32864961 DOI: 10.1021/acs.inorgchem.0c01932] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Two anthryl platinum(II) N,N'-bis(3,5-di-tert-butylsalicylidene)-1,2-benzenediamine Schiff base complexes were synthesized, with the anthryl attached via its 9 position (Pt-9An) or 2 position (Pt-2An) to the platinum (Pt) Schiff base backbone. The complexes show unusually small Stokes shifts (0.23 eV), representing a very small energy loss for the photoexcitation/intersystem crossing process, which is beneficial for applications as triplet photosensitizers. Phosphorescence of the Pt(II) coordination framework (ΦP = 11.0%) is quenched in the anthryl-containing complexes (ΦP = 4.0%) and shows a biexponential decay (τP = 3.4 μs/87% and 18.2 μs/13%) compared to the single-exponential decay of the native Pt(II) Schiff base complex (τP = 3.7 μs). Femtosecond/nanosecond transient absorption spectroscopy suggests an equilibrium between triplet anthracene (3An) and triplet metal-to-ligand charge-transfer (3MLCT) states, with the dark 3An state slightly lower in energy (1.96 eV for Pt-9An and 1.90 eV for Pt-2An) than the emissive 3MLCT state (1.97 eV for Pt-9An and 1.91 eV for Pt-2An). Intramolecular triplet-triplet energy transfer (TTET) and reverse TTET take 4.8 ps/444 ps for Pt-9An and 55 ps/1.7 ns for Pt-2An, respectively. The triplet-state equilibrium extends the triplet-state lifetime of the complexes to 103 μs (Pt-2An) or 163 μs (Pt-9An), in comparison to the native Pt(II) complex, which shows a lifetime of 4.0 μs. The complexes were used for triplet-triplet-annihilation upconversion with perylene as the triplet acceptor. The upconversion quantum yield is up to 15%, and a large anti-Stokes shift (0.75 eV) is achieved by excitation into the singlet metal-to-ligand charge-transfer absorption band (589 nm) of the complexes (anti-Stokes shift is 0.92 eV with 9,10-diphenylanthracene as the acceptor).
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Affiliation(s)
- Kepeng Chen
- 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
| | - Mushraf Hussain
- 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
| | - Syed S Razi
- 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.,Department of Chemistry, Gaya College, Gaya, Constituent Unit of Magadh University, Bodhgaya, Bihar 823001, India
| | - Yuqi Hou
- 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
| | - Elif Akhuseyin Yildiz
- Department of Engineering Physics, Faculty of Engineering, Ankara University, Bes̨evler, Ankara 06100, Turkey
| | - 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
| | - Halime Gul Yaglioglu
- Department of Engineering Physics, Faculty of Engineering, Ankara University, Bes̨evler, Ankara 06100, Turkey
| | - Mariangela Di Donato
- European Laboratory for Non-Linear Spectroscopy, via North Carrara 1, Sesto Fiorentino, Florence 50019, Italy.,ICCOM-CNR via Madonna del Piano 10, Sesto Fiorentino, Florence 50019, Italy
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15
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Han J, Lu H, Xu Y, Guo S, Zheng X, Tao P, Liu S, Zhang X, Zhao Q. Concentration-dependent circularly polarized luminescence of chiral cyclometalated platinum(II) complexes for electroluminescence. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121240] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Puttock EV, Sil A, Yufit DS, Williams JAG. Mono and dinuclear iridium(iii) complexes featuring bis-tridentate coordination and Schiff-base bridging ligands: the beneficial effect of a second metal ion on luminescence. Dalton Trans 2020; 49:10463-10476. [DOI: 10.1039/d0dt01964j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ditopic bis-N^N^O-coordinating ligands, prepared by Schiff base chemistry, lead to dinuclear iridium complexes that emit much more brightly than their mononuclear counterparts.
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Affiliation(s)
| | - Amit Sil
- Department of Chemistry
- Durham University
- Durham
- UK
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17
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Hsu LY, Liang Q, Wang Z, Kuo HH, Tai WS, Su SJ, Zhou X, Yuan Y, Chi Y. Bis-tridentate Ir III Phosphors Bearing Two Fused Five-Six-Membered Metallacycles: A Strategy to Improved Photostability of Blue Emitters. Chemistry 2019; 25:15375-15386. [PMID: 31573110 DOI: 10.1002/chem.201903707] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/30/2019] [Indexed: 12/19/2022]
Abstract
Iridium complexes bearing chelating cyclometalates are popular choices as dopant emitters in the fabrication of organic light-emitting diodes (OLEDs). In this contribution, we report a series of blue-emitting, bis-tridentate IrIII complexes bearing chelates with two fused five-six-membered metallacycles, which are in sharp contrast to the traditional designs of tridentate chelates that form the alternative, fused five-five metallacycles. Five IrIII complexes, Px-21-23, Cz-4, and Cz-5, have been synthesized that contain a coordinated dicarbene pincer chelate incorporating a methylene spacer and a dianionic chromophoric chelate possessing either a phenoxy or carbazolyl appendage to tune the coordination arrangement. All these tridentate chelates afford peripheral ligand-metal-ligand bite angles of 166-170°, which are larger than the typical bite angle of 153-155° observed for their five-five-coordinated tridentate counterparts, thereby leading to reduced geometrical distortion in the octahedral frameworks. Photophysical measurements and TD-DFT studies verified the inherent transition characteristics that give rise to high emission efficiency, and photodegradation experiments confirmed the improved stability in comparison with the benchmark fac-[Ir(ppy)3 ] in degassed toluene at room temperature. Phosphorescent OLED devices were also fabricated, among which the carbazolyl-functionalized emitter Cz-5 exhibited the best performance among all the studied bis-tridentate phosphors, showing a maximum external quantum efficiency (EQEmax ) of 18.7 % and CIEx,y coordinates of (0.145, 0.218), with a slightly reduced EQE of 13.7 % at 100 cd m-2 due to efficiency roll-off.
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Affiliation(s)
- Ling-Yang Hsu
- Department of Chemistry and Frontier Research Center on, Fundamental and Applied Sciences of Matter, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Qiumin Liang
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, P.R. China
| | - Zhiheng Wang
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, P.R. China
| | - Hsin-Hung Kuo
- Department of Chemistry and Frontier Research Center on, Fundamental and Applied Sciences of Matter, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Wun-Shan Tai
- Department of Chemistry and Frontier Research Center on, Fundamental and Applied Sciences of Matter, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Shi-Jian Su
- State Key Laboratory of Luminescent Materials and Devices, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, P.R. China
| | - Xiuwen Zhou
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland, 4072, Australia
| | - Yi Yuan
- Department of Materials Science and Engineering, and Department of Chemistry, City University of Hong Kong, Hong Kong, SAR
| | - Yun Chi
- Department of Chemistry and Frontier Research Center on, Fundamental and Applied Sciences of Matter, National Tsing Hua University, Hsinchu, 30013, Taiwan.,Department of Materials Science and Engineering, and Department of Chemistry, City University of Hong Kong, Hong Kong, SAR
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18
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Stereoselective C-X and regioselective C-H activation to, and selective C(sp)-C(sp) reductive elimination from, platinum compounds with thiophene-derived ligands. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Puttock EV, Fradgley JD, Yufit DS, Williams JAG. A family of readily synthesised phosphorescent platinum(ii) complexes based on tridentate N^N^O-coordinating Schiff-base ligands. Dalton Trans 2019; 48:15012-15028. [DOI: 10.1039/c9dt03156a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tridentate ligands, easily synthesised by condensation reactions of simple starting materials, can be used to prepare Pt(ii) complexes that are luminescent in solution, emitting in the red or deep-red spectral region, according to the substituents.
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20
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Komiya N, Hosokawa T, Adachi J, Inoue R, Kawamorita S, Naota T. Regiospecific Remote Pt–H Interactions in Oligomethylene‐Vaulted (
N
^
C
^
N
)‐Pincer Pt
II
Complexes. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800927] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Naruyoshi Komiya
- Department of Chemistry Graduate School of Engineering Science Osaka University Machikaneyama 560‐8531 Toyonaka Osaka Japan
- Chemistry Laboratory Graduate School of Engineering Science The Jikei University School of Medicine Kokuryo 182‐8570 Chofu Tokyo Japan
| | - Takashi Hosokawa
- Department of Chemistry Graduate School of Engineering Science Osaka University Machikaneyama 560‐8531 Toyonaka Osaka Japan
| | - Junya Adachi
- Department of Chemistry Graduate School of Engineering Science Osaka University Machikaneyama 560‐8531 Toyonaka Osaka Japan
| | - Ryo Inoue
- Department of Chemistry Graduate School of Engineering Science Osaka University Machikaneyama 560‐8531 Toyonaka Osaka Japan
| | - Soichiro Kawamorita
- Department of Chemistry Graduate School of Engineering Science Osaka University Machikaneyama 560‐8531 Toyonaka Osaka Japan
| | - Takeshi Naota
- Department of Chemistry Graduate School of Engineering Science Osaka University Machikaneyama 560‐8531 Toyonaka Osaka Japan
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21
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Natoli SN, Hight LM, Zeller M, McMillin DR. Photophysical Properties of Pt(II) Polypyridines with Five- versus Six-Membered Chelate Rings: Trade-Offs in Angle Strain. Inorg Chem 2018; 57:6521-6529. [PMID: 29749742 DOI: 10.1021/acs.inorgchem.8b00636] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This report describes the synthesis and characterization of a series of eight [Pt(NNN)X]+ complexes where the tridentate NNN ligand is (2,2'-bipyrid-6-yl)(pyrid-2-yl)sulfide (btp) or methyl(2,2'-bipyrid-6-yl)(pyrid-2-yl)amine (bmap) and X is OMe, Cl, phenylethynyl (C2Ph), or cyclohexylethynyl (C2Cy). The expectation was that inserting a heteroatom into the backbone of 2,2':6',2″-terpyridine (trpy) would expand the overall intraligand bite angle, introduce ILCT character into the excited states, and improve the photophysical properties. Crystal structures of [Pt(bmap)C2Ph]+ and [Pt(btp)Cl]+ reveal that atom insertion into the trpy backbone successfully expands the bite angle of the ligand by 8-10°. However, the impact on the photophysics is minimal. Indeed, of the eight systems investigated, only the [Pt(bmap)C2Ph]+ and [Pt(btp)C2Ph]+ complexes display appreciable emission in fluid solution, and they exhibit shorter emission lifetimes than [Pt(trpy)C2Ph]+. One reason is that the bond angle preferences of platinum and the inserted heteroatom induce the six-membered rings to deviate from planarity and adopt a boat-like conformation, impairing charge delocalization within the ligand. In addition, angle strain induces the donor atoms about platinum to assume a pseudotetrahedral arrangement, which offsets any benefit due to the increase in overall bite angle by promoting deactivation via d-d excited states. The results reveal that, in order to improve the luminescence of a [Pt(NNN)X]+ system, one must take care to avoid trading one kind of angle strain for another.
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Affiliation(s)
- Sean N Natoli
- H.C. Brown Laboratory, Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Lauren M Hight
- H.C. Brown Laboratory, Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Matthias Zeller
- H.C. Brown Laboratory, Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
| | - David R McMillin
- H.C. Brown Laboratory, Department of Chemistry , Purdue University , West Lafayette , Indiana 47907 , United States
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22
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Schulze B, Friebe C, Jäger M, Görls H, Birckner E, Winter A, Schubert US. PtII Phosphors with Click-Derived 1,2,3-Triazole-Containing Tridentate Chelates. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00777] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- B. Schulze
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - C. Friebe
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - M. Jäger
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - H. Görls
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - E. Birckner
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - A. Winter
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - U. S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), ‡Center for Energy
and Environmental Chemistry Jena (CEEC Jena), §Laboratory of Inorganic and Analytical
Chemistry, and ∥Institute of Physical Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
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23
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A rapidly-reversible absorptive and emissive vapochromic Pt(II) pincer-based chemical sensor. Nat Commun 2017; 8:1800. [PMID: 29176716 PMCID: PMC5702612 DOI: 10.1038/s41467-017-01941-2] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 10/26/2017] [Indexed: 11/08/2022] Open
Abstract
Selective, robust and cost-effective chemical sensors for detecting small volatile-organic compounds (VOCs) have widespread applications in industry, healthcare and environmental monitoring. Here we design a Pt(II) pincer-type material with selective absorptive and emissive responses to methanol and water. The yellow anhydrous form converts reversibly on a subsecond timescale to a red hydrate in the presence of parts-per-thousand levels of atmospheric water vapour. Exposure to methanol induces a similarly-rapid and reversible colour change to a blue methanol solvate. Stable smart coatings on glass demonstrate robust switching over 104 cycles, and flexible microporous polymer membranes incorporating microcrystals of the complex show identical vapochromic behaviour. The rapid vapochromic response can be rationalised from the crystal structure, and in combination with quantum-chemical modelling, we provide a complete microscopic picture of the switching mechanism. We discuss how this multiscale design approach can be used to obtain new compounds with tailored VOC selectivity and spectral responses.
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24
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25
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Rees TW, Liao J, Sinopoli A, Male L, Calogero G, Curchod BFE, Baranoff E. Synthesis and Characterization of a Series of Bis-homoleptic Cycloruthenates with Terdentate Ligands as a Family of Panchromatic Dyes. Inorg Chem 2017; 56:9903-9912. [PMID: 28763219 DOI: 10.1021/acs.inorgchem.7b01412] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of six homoleptic bis-cyclometalated ruthenium complexes, Ru(N^N^C)2, is reported where N^N^C is a 6-(2,4-difluoro-3-R3-phenyl)-4-R2-4'-R1-2,2'-bipyridine with R3 = -H or -CF3 and R2 and R1 = -COOEt or -CF3. An effective synthesis of the ligands and the complexes is described. The UV-visible absorption studies demonstrate that these complexes are panchromatic dyes absorbing up to 900 nm. Importantly, the onset of absorption depends only on the substitution on the metalated phenyl, whereas the intensity of absorption throughout the spectra is a function of substituents on both the phenyl and the bipyridine moieties. The same trend is observed in electrochemistry as the redox gap depends only on the substitution on the metalated phenyl, whereas the oxidation and reduction potentials are a function of substituents on both the phenyl and the bipyridine moieties. Preliminary tests as sensitizer for dye-sensitized solar cells demonstrate that the number of anchoring groups on the dye has a major influence on the device efficiency.
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Affiliation(s)
- Thomas W Rees
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K
| | - JinFeng Liao
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K.,Sun Yat-sen University , Guangzhou 510275, P.R. China
| | - Alessandro Sinopoli
- Qatar Environment & Energy Institute (QEERI), Hamad bin Khalifa University (HBKU) , Doha Qatar
| | - Louise Male
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K
| | - Giuseppe Calogero
- CNR-IPCF, Istituto per i Processi Chimico-Fisici , Messina 98158, Italy
| | - Basile F E Curchod
- Centre for Computational Chemistry, School of Chemistry, University of Bristol , Bristol BS8 1TS, U.K
| | - Etienne Baranoff
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, U.K
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26
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Chan AKW, Ng M, Wong YC, Chan MY, Wong WT, Yam VWW. Synthesis and Characterization of Luminescent Cyclometalated Platinum(II) Complexes with Tunable Emissive Colors and Studies of Their Application in Organic Memories and Organic Light-Emitting Devices. J Am Chem Soc 2017; 139:10750-10761. [DOI: 10.1021/jacs.7b04952] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Alan Kwun-Wa Chan
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
| | - Maggie Ng
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
| | - Yi-Chun Wong
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
| | - Mei-Yee Chan
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
| | - Wing-Tak Wong
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
| | - Vivian Wing-Wah Yam
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
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27
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Klimes K, Zhu Z, Huang L, Li J. 50-3: Invited Paper
: Improving Charge Confinement in Blue OLED Devices Through Novel Design of the Emissive Layer Stack. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/sdtp.11732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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28
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Mambanda A, Jaganyi D. Controlling the Lability of Square-Planar Pt(II) Complexes Through Electronic and π-Conjugation: Correlation Between Kinetics and Theoretical Parameters. ADVANCES IN INORGANIC CHEMISTRY 2017. [DOI: 10.1016/bs.adioch.2017.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Synthesis, Structure and Reactivity of Cyclometalated Nickel(II) Complexes: A Review and Perspective. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES INDIA SECTION A-PHYSICAL SCIENCES 2016. [DOI: 10.1007/s40010-016-0289-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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30
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Tang MC, Chan AKW, Chan MY, Yam VWW. Platinum and Gold Complexes for OLEDs. Top Curr Chem (Cham) 2016; 374:46. [PMID: 27573398 DOI: 10.1007/s41061-016-0046-y] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 06/14/2016] [Indexed: 12/20/2022]
Abstract
Encouraging efforts on the design of high-performance organic materials and smart architecture during the past two decades have made organic light-emitting device (OLED) technology an important competitor for the existing liquid crystal displays. Particularly, the development of phosphorescent materials based on transition metals plays a crucial role for this success. Apart from the extensively studied iridium(III) complexes with d(6) electronic configuration and octahedral geometry, the coordination-unsaturated nature of d(8) transition metal complexes with square-planar structures has been found to provide intriguing spectroscopic and luminescence properties. This article briefly summarizes the development of d(8) platinum(II) and gold(III) complexes and their application studies in the fabrication of phosphorescent OLEDs. An in-depth understanding of the nature of the excited states has offered a great opportunity to fine-tune the emission colors covering the entire visible spectrum as well as to improve their photophysical properties. With good device engineering, high performance vacuum-deposited OLEDs with external quantum efficiencies (EQEs) of up to 30 % and solution-processable OLEDs with EQEs of up to 10 % have been realized by modifying the cyclometalated or pincer ligands of these metal complexes. These impressive demonstrations reveal that d(8) metal complexes are promising candidates as phosphorescent materials for OLED applications in displays as well as in solid-state lighting in the future.
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Affiliation(s)
- Man-Chung Tang
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Alan Kwun-Wa Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Mei-Yee Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
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31
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Chan MHY, Wong HL, Yam VWW. Synthesis and Photochromic Studies of Dithienylethene-Containing Cyclometalated Alkynylplatinum(II) 1,3-Bis(N-alkylbenzimidazol-2′-yl)benzene Complexes. Inorg Chem 2016; 55:5570-7. [DOI: 10.1021/acs.inorgchem.6b00619] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Ho-Yeung Chan
- Institute of Molecular Functional Materials (Areas of
Excellence Scheme, University Grants Committee (Hong Kong)) and Department
of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Hok-Lai Wong
- Institute of Molecular Functional Materials (Areas of
Excellence Scheme, University Grants Committee (Hong Kong)) and Department
of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of
Excellence Scheme, University Grants Committee (Hong Kong)) and Department
of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong
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32
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Sesolis H, Dubarle-Offner J, Chan CKM, Puig E, Gontard G, Winter P, Cooksy AL, Yam VWW, Amouri H. Highly Phosphorescent Crystals of Square-Planar Platinum Complexes with Chiral Organometallic Linkers: Homochiral versus Heterochiral Arrangements, Induced Circular Dichroism, and TD-DFT Calculations. Chemistry 2016; 22:8032-7. [DOI: 10.1002/chem.201601161] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Hugo Sesolis
- UPMC Paris 06; Institut Parisien de Chimie Moléculaire (IPCM) UMR CNRS 8232; 4 place Jussieu 75252 Paris cedex 05 France
| | - Julien Dubarle-Offner
- UPMC Paris 06; Institut Parisien de Chimie Moléculaire (IPCM) UMR CNRS 8232; 4 place Jussieu 75252 Paris cedex 05 France
| | - Carmen K. M. Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee, Hong Kong) and Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
| | - Emmanuel Puig
- UPMC Paris 06; Institut Parisien de Chimie Moléculaire (IPCM) UMR CNRS 8232; 4 place Jussieu 75252 Paris cedex 05 France
| | - Geoffrey Gontard
- UPMC Paris 06; Institut Parisien de Chimie Moléculaire (IPCM) UMR CNRS 8232; 4 place Jussieu 75252 Paris cedex 05 France
| | - Pierre Winter
- Department of Chemistry and Biochemistry; San Diego State University; 5500 Campanile Drive San Diego California 92182-1030 USA
| | - Andrew L. Cooksy
- Department of Chemistry and Biochemistry; San Diego State University; 5500 Campanile Drive San Diego California 92182-1030 USA
| | - Vivian W. W. Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee, Hong Kong) and Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
| | - Hani Amouri
- UPMC Paris 06; Institut Parisien de Chimie Moléculaire (IPCM) UMR CNRS 8232; 4 place Jussieu 75252 Paris cedex 05 France
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33
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Nosova EV, Moshkina TN, Kopchuk DS, Lipunova GN, Slepukhin PA, Charushin VN. Cyclometallated PTII complexes of 2-(2-thienyl)-4-(cycloalkylimino)-substituted quinazolines. MENDELEEV COMMUNICATIONS 2016. [DOI: 10.1016/j.mencom.2016.03.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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34
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Wekesa IM, Jaganyi D. The deleterious effect of pyrollic-nitrogen on the substitution reactivity of tridentate N^C^N platinum(II) complexes. A kinetic and mechanistic study. J COORD CHEM 2016. [DOI: 10.1080/00958972.2015.1125892] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Isaac Masika Wekesa
- School of Chemistry and Physics, University of KwaZulu-Natal, Pietermaritzburg, South Africa
| | - Deogratius Jaganyi
- School of Chemistry and Physics, University of KwaZulu-Natal, Pietermaritzburg, South Africa
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35
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Moussa J, Haddouche K, Chamoreau LM, Amouri H, Gareth Williams JA. New N^C^N-coordinated Pd(ii) and Pt(ii) complexes of a tridentate N-heterocyclic carbene ligand featuring a 6-membered central ring: synthesis, structures and luminescence. Dalton Trans 2016; 45:12644-8. [DOI: 10.1039/c6dt02415g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Photoluminescent pincer-like Pd(ii) and Pt(ii) complexes with a rare tridentate N^C^N ligand with a six membered NHC central core are described. Solid-state packing exhibits M(ii)⋯M(ii) and π–π interactions.
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Affiliation(s)
- Jamal Moussa
- UPMC Université Paris 06
- Institut Parisien de Chimie Moléculaire (UMR 8232)
- 75252 Paris Cedex 05
- France
| | - Kamel Haddouche
- UPMC Université Paris 06
- Institut Parisien de Chimie Moléculaire (UMR 8232)
- 75252 Paris Cedex 05
- France
| | - Lise-Marie Chamoreau
- UPMC Université Paris 06
- Institut Parisien de Chimie Moléculaire (UMR 8232)
- 75252 Paris Cedex 05
- France
| | - Hani Amouri
- UPMC Université Paris 06
- Institut Parisien de Chimie Moléculaire (UMR 8232)
- 75252 Paris Cedex 05
- France
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36
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Brodnik H, Požgan F, Štefane B. Synthesis of 8-heteroaryl nitroxoline analogues via one-pot sequential Pd-catalyzed coupling reactions. Org Biomol Chem 2016; 14:1969-81. [DOI: 10.1039/c5ob02364e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of 8-heteroaryl substituted quinolines were prepared, either by direct C–H arylation of five-membered heteroarenes, or Pd-catalyzed coupling of organoboron reagents with bromoquinolines.
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Affiliation(s)
- Helena Brodnik
- Faculty of Chemistry and Chemical Technology
- University of Ljubljana
- SI-1000 Ljubljana
- Slovenia
| | - Franc Požgan
- Faculty of Chemistry and Chemical Technology
- University of Ljubljana
- SI-1000 Ljubljana
- Slovenia
| | - Bogdan Štefane
- Faculty of Chemistry and Chemical Technology
- University of Ljubljana
- SI-1000 Ljubljana
- Slovenia
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37
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Anderson CM, Greenberg MW, Balema TA, Duman LM, Oh N, Hashmi A, Ladner L, Jain K, Yu D, Tanski JM. Regioselective formation of six-membered platinacycles by C–X and C–H oxidative addition. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.121] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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38
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Huo S, Carroll J, Vezzu DAK. Design, Synthesis, and Applications of Highly Phosphorescent Cyclometalated Platinum Complexes. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500246] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shouquan Huo
- Department of Chemistry; East Carolina University; Greenville North Carolina 27858 USA
| | - Jeffrey Carroll
- Department of Chemistry; East Carolina University; Greenville North Carolina 27858 USA
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39
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Hung TQ, Dang TT, Janke J, Villinger A, Langer P. Efficient synthesis of α- and δ-carbolines by sequential Pd-catalyzed site-selective C–C and twofold C–N coupling reactions. Org Biomol Chem 2015; 13:1375-86. [DOI: 10.1039/c4ob02226b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two concise and efficient approaches were developed for the synthesis of α- and δ-carboline derivatives.
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Affiliation(s)
| | - Tuan Thanh Dang
- Institut für Chemie
- Universität Rostock
- 18059 Rostock
- Germany
- Organic Chemistry
| | - Julia Janke
- Institut für Chemie
- Universität Rostock
- 18059 Rostock
- Germany
| | | | - Peter Langer
- Institut für Chemie
- Universität Rostock
- 18059 Rostock
- Germany
- Leibniz Institut für Katalyse an der Universität Rostock e. V. (LIKAT)
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40
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Lipunova GN, Nosova EV, Charushin VN, Chupakhin ON. Structural, Optical Properties, and Biological Activity of Complexes Based on Derivatives of Quinoline, Quinoxaline, and Quinazoline with Metal Centers from Across the Periodic Table. COMMENT INORG CHEM 2014. [DOI: 10.1080/02603594.2014.959116] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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41
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Petersen AR, Taylor RA, Vicente-Hernández I, Mallender PR, Olley H, White AJP, Britovsek GJP. Oxygen Insertion into Metal Carbon Bonds: Formation of Methylperoxo Pd(II) and Pt(II) Complexes via Photogenerated Dinuclear Intermediates. J Am Chem Soc 2014; 136:14089-99. [DOI: 10.1021/ja5055143] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Allan R. Petersen
- Department of Chemistry, Imperial College London, Exhibition
Road, London, SW7 2AZ, U.K
| | - Russell A. Taylor
- Department of Chemistry, Imperial College London, Exhibition
Road, London, SW7 2AZ, U.K
| | | | - Philip R. Mallender
- Department of Chemistry, Imperial College London, Exhibition
Road, London, SW7 2AZ, U.K
| | - Harriet Olley
- Department of Chemistry, Imperial College London, Exhibition
Road, London, SW7 2AZ, U.K
| | - Andrew J. P. White
- Department of Chemistry, Imperial College London, Exhibition
Road, London, SW7 2AZ, U.K
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42
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Gandioso A, Valle-Sistac J, Rodrı́guez L, Crespo M, Font-Bardı́a M. Platinum(II) Compounds Containing Cyclometalated Tridentate Ligands: Synthesis, Luminescence Studies, and a Selective Fluoro for Methoxy Substitution. Organometallics 2014. [DOI: 10.1021/om401111t] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Albert Gandioso
- Departament de Quı́mica
Inorgànica, Facultat de Quı́mica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Jennifer Valle-Sistac
- Departament de Quı́mica
Inorgànica, Facultat de Quı́mica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Laura Rodrı́guez
- Departament de Quı́mica
Inorgànica, Facultat de Quı́mica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Margarita Crespo
- Departament de Quı́mica
Inorgànica, Facultat de Quı́mica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Mercè Font-Bardı́a
- Unitat de Difracció de Raigs-X, Centres Científics
i Tecnològics de la Universitat de Barcelona (CCiTUB), Universitat de Barcelona, Solé i Sabarís, 1-3, 08028 Barcelona, Spain
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43
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Wekesa IM, Jaganyi D. Kinetic and mechanistic studies of 1,3-bis(2-pyridylimino)isoindolate Pt(ii) derivatives. Experimental and new computational approach. Dalton Trans 2014; 43:2549-58. [DOI: 10.1039/c3dt52272e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Qu X, Liu Y, Si Y, Wu X, Wu Z. A theoretical study on supramolecularly-caged positively charged iridium(iii) 2-pyridyl azolate derivatives as blue emitters for light-emitting electrochemical cells. Dalton Trans 2014; 43:1246-60. [DOI: 10.1039/c3dt51888d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Harris CF, Vezzu DAK, Bartolotti L, Boyle PD, Huo S. Synthesis, Structure, Photophysics, and a DFT Study of Phosphorescent C*N∧N- and C∧N∧N-Coordinated Platinum Complexes. Inorg Chem 2013; 52:11711-22. [DOI: 10.1021/ic400732g] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Caleb F. Harris
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
| | - Dileep A. K. Vezzu
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
| | - Libero Bartolotti
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
| | - Paul D. Boyle
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Shouquan Huo
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
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46
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Chan AKW, Lam ESH, Tam AYY, Tsang DPK, Lam WH, Chan MY, Wong WT, Yam VWW. Synthesis and characterization of luminescent cyclometalated platinum(II) complexes of 1,3-bis-hetero-azolylbenzenes with tunable color for applications in organic light-emitting devices through extension of π conjugation by variation of the heteroatom. Chemistry 2013; 19:13910-24. [PMID: 23999951 DOI: 10.1002/chem.201301586] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Indexed: 01/09/2023]
Abstract
A series of luminescent cyclometalated platinum(II) complexes of N^C^N ligands [N^C^N=2,6-bis(benzoxazol-2'-yl)benzene (bzoxb), 2,6-bis(benzothiazol-2'-yl)benzene (bzthb), and 2,6-bis(N-alkylnaphthoimidazol-2'-yl)benzene (naphimb)] has been synthesized and characterized. Two of the platinum(II) complexes have been structurally characterized by X-ray crystallography. Their electrochemical, electronic absorption, and luminescence properties have been investigated. In dichloromethane solution at room temperature, the cyclometalated N^C^N platinum(II) complexes exhibited rich luminescence with well-resolved vibronic-structured emission bands. The emission energies of the complexes are found to be closely related to the electronic properties of the N^C^N ligands. By varying the electronic properties of the cyclometalated ligands, a fine-tuning of the emission energies can be achieved, as supported by computational studies. Multilayer organic light-emitting devices have been prepared by utilizing two of these platinum(II) complexes as phosphorescent dopants, in which a saturated yellow emission with Commission International de I'Eclairage coordinates of (0.50, 0.49) was achieved.
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Affiliation(s)
- Alan Kwun-Wa Chan
- Department of Chemistry, The University of Hong Kong, Pokfulam Road (Hong Kong), Fax: (+852) 2857-1586
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47
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Wen HM, Wang JY, Li B, Zhang LY, Chen CN, Chen ZN. Phosphorescent Square-Planar Platinum(II) Complexes of 1,3-Bis(2-pyridylimino)isoindoline with a Monodentate Strong-Field Ligand. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300622] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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48
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Hoang TNY, Humbert-Droz M, Dutronc T, Guénée L, Besnard C, Piguet C. A Polyaromatic Terdentate Binding Unit with Fused 5,6-Membered Chelates for Complexing s-, p-, d-, and f-Block Cations. Inorg Chem 2013; 52:5570-80. [DOI: 10.1021/ic400526j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Thi Nhu Y Hoang
- Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland.
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49
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Parada GA, Fredin LA, Santoni MP, Jäger M, Lomoth R, Hammarström L, Johansson O, Persson P, Ott S. Tuning the Electronics of Bis(tridentate)ruthenium(II) Complexes with Long-Lived Excited States: Modifications to the Ligand Skeleton beyond Classical Electron Donor or Electron Withdrawing Group Decorations. Inorg Chem 2013; 52:5128-37. [DOI: 10.1021/ic400009m] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Giovanny A. Parada
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
| | - Lisa A. Fredin
- Chemistry Department, Theoretical
Chemistry Division, Lund University, Box
124, SE-22100 Lund, Sweden
| | - Marie-Pierre Santoni
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
| | - Michael Jäger
- Laboratory of Organic and Macromolecular
Chemistry, Friedrich-Schiller-Universität Jena, Humboldtstr. 10, D-07743 Jena, Germany
| | - Reiner Lomoth
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
| | - Leif Hammarström
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
| | - Olof Johansson
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
| | - Petter Persson
- Chemistry Department, Theoretical
Chemistry Division, Lund University, Box
124, SE-22100 Lund, Sweden
| | - Sascha Ott
- Ångström
Laboratory,
Department of Chemistry, Uppsala University, Box 523, SE-75120 Uppsala, Sweden
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50
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