1
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McEllin AJ, Goult CA, Whitwood AC, Lynam JM, Bruce DW. On the mercuration, palladation, transmetalation and direct auration of a C^N^C pincer ligand. Dalton Trans 2023; 52:872-876. [PMID: 36632828 DOI: 10.1039/d2dt04114f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The C^N^C ligand 2,6-bis(2,3-dialkoxyphenyl)pyridine forms dimercury and orthopalladated complexes, both of which may be transmetallated to gold(III) complexes; the gold complexes may also be formed directly in a Rh(III)-catalysed process, hence it is possible to circumvent the use of organomercury intermediates in the synthesis of this important class of compound.
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Affiliation(s)
- Alice Jane McEllin
- Department of Chemistry, University of York, Heslington, YORK YO10 5DD, UK.
| | | | - Adrian C Whitwood
- Department of Chemistry, University of York, Heslington, YORK YO10 5DD, UK.
| | - Jason M Lynam
- Department of Chemistry, University of York, Heslington, YORK YO10 5DD, UK.
| | - Duncan W Bruce
- Department of Chemistry, University of York, Heslington, YORK YO10 5DD, UK.
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2
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Parker R, Stracey RF, McEllin AJ, Chen X, Wang Y, Williams JAG, Lynam JM, Bruce DW. Synthesis, Mesomorphism, Photophysics, and Device Properties of Liquid-Crystalline Pincer Complexes of Gold(III) Containing Semiperfluorinated Chains. ACS OMEGA 2022; 7:24903-24917. [PMID: 35874197 PMCID: PMC9301954 DOI: 10.1021/acsomega.2c03669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Gold(III) complexes of C∧N∧C-coordinating 2,6-diphenylpyridine pincer ligands with arylacetylide co-ligands are known triplet emitters at room temperature. We have reported previously that by functionalizing both the pincer ligand and the phenylacetylene with alkoxy chains, liquid crystallinity may be induced, with the complexes showing columnar mesophases. We now report new derivatives in which the phenylacetylene incorporates one, two, or three 1H,1H,2H,2H-perfluoroalkyl chains. In terms of intermolecular interactions, solution 1H NMR experiments suggest that the semiperfluoroalkyl chains promote a parallel, head-to-head arrangement of neighboring molecules relative to one another, rather than the anti-parallel, head-to-tail orientation found for the all-hydrocarbon materials. In terms of the liquid crystal properties, the complexes show columnar phases, with the addition of the more rigid fluorocarbon chains leading to a stabilization of both the crystal and liquid crystal mesophases. Mesophase temperature ranges were also wider. Interestingly, the amphiphilic nature of these complexes is evident through the observation of a frustrated columnar nematic phase between a Colr and a Colh phase, an observation recently reported in detail for one compound (Liq. Cryst., 2022, doi: 10.1080/02678292.2021.1991017). While calculation shows that, despite the "electronic insulation" provided by the dimethylene spacer group in the semiperfluoroalkyl chains, a small hypsochromic shift in one component of the absorption band is anticipated, experimentally this effect is not observed in the overall absorption envelope. Complexes with substituents in the 3,3',4,4'-positions of the phenyl rings of the pincer ligand once more show higher-luminescence quantum yields than the analogues with substituents in the 4,4'-positions only, associated with the lower-energy-emissive state in the former. However, in contrast to the observations with all-hydrocarbon analogues, the luminescence quantum yield of the complexes with 3,3',4,4'-substitution on the pincer increases as the number of semiperfluoroalkyl chains on the phenylacetylide increases, from 20% (one chain) to 34% (three chains). External quantum efficiencies in fabricated OLED devices are, however, low, attributed to the poor dispersion in the host materials on account of the fluorinated chains.
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Affiliation(s)
- Rachel
R. Parker
- Department
of Chemistry, University of York, Heslington, York YO10
5DD, U.K.
| | - Rachel F. Stracey
- Department
of Chemistry, University of York, Heslington, York YO10
5DD, U.K.
| | - Alice J. McEllin
- Department
of Chemistry, University of York, Heslington, York YO10
5DD, U.K.
| | - Xinrui Chen
- School
of Materials Science & Engineering, Changzhou University, Changzhou 213164, PR China
| | - Yafei Wang
- School
of Materials Science & Engineering, Changzhou University, Changzhou 213164, PR China
| | - J. A. Gareth Williams
- Department
of Chemistry, University Science Laboratories, Durham University, South Road, Durham DH1
3LE, U.K.
| | - Jason M. Lynam
- Department
of Chemistry, University of York, Heslington, York YO10
5DD, U.K.
| | - Duncan W. Bruce
- Department
of Chemistry, University of York, Heslington, York YO10
5DD, U.K.
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3
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Jiang JJ, Chau AKH, Wong MK, Leung FKC. Controlled Supramolecular Assembly of Gold (III) Amphiphiles in Aqueous Media. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jia-Jun Jiang
- The Hong Kong Polytechnic University Department of Applied Biology and Chemical Technology HONG KONG
| | - Anson Kwok-Hei Chau
- The Hong Kong Polytechnic University Department of Applied Biology and Chemical Technology Hong Kong HONG KONG
| | - Man-Kin Wong
- The Hong Kong Polytechnic University Department of Applied Biology and Chemical Technology HONG KONG
| | - Franco King Chi Leung
- The Hong Kong Polytechnic University Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Hung Hom, Kowloon xxx Hong Kong HONG KONG
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4
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Li LK, Leung SYL, Chu A, Yim KC, Cheung WL, Chan MY, Yam VWW. Synthesis of luminescent phosphine-containing rigid-rod dinuclear alkynylgold(I) complexes and their X-Ray structural, photophysical, self-assembly and electroluminescence studies. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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5
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Tang MC, Chan MY, Yam VWW. Molecular Design of Luminescent Gold(III) Emitters as Thermally Evaporable and Solution-Processable Organic Light-Emitting Device (OLED) Materials. Chem Rev 2021; 121:7249-7279. [DOI: 10.1021/acs.chemrev.0c00936] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Man-Chung Tang
- 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
| | - Vivian Wing-Wah Yam
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
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6
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Beucher H, Kumar S, Kumar R, Merino E, Hu WH, Stemmler G, Cuesta-Galisteo S, González JA, Bezinge L, Jagielski J, Shih CJ, Nevado C. Phosphorescent κ 3 -(N^C^C)-Gold(III) Complexes: Synthesis, Photophysics, Computational Studies and Application to Solution-Processable OLEDs. Chemistry 2020; 26:17604-17612. [PMID: 32780903 DOI: 10.1002/chem.202003571] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Indexed: 12/19/2022]
Abstract
Efficient OLED devices have been fabricated using organometallic complexes of platinum group metals. Still, the high material cost and low stability represent central challenges for their application in commercial display technologies. Based on its innate stability, gold(III) complexes are emerging as promising candidates for high-performance OLEDs. Here, a series of alkynyl-, N-heterocyclic carbene (NHC)- and aryl-gold(III) complexes stabilized by a κ3 -(N^C^C) template have been prepared and their photophysical properties have been characterized in detail. These compounds exhibit good photoluminescence quantum efficiency (ηPL ) of up to 33 %. The PL emission can be tuned from sky-blue to yellowish green colors by variations on both the ancillary ligands as well as on the pincer template. Further, solution-processable OLED devices based on some of these complexes display remarkable emissive properties (ηCE 46.6 cd.A-1 and ηext 14.0 %), thus showcasing the potential of these motifs for the low-cost fabrication of display and illumination technologies.
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Affiliation(s)
- Hélène Beucher
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Sudhir Kumar
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Roopender Kumar
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Estíbaliz Merino
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Wei-Hsu Hu
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Gerrit Stemmler
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Sergio Cuesta-Galisteo
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Jorge A González
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Léonard Bezinge
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Jakub Jagielski
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Chih-Jen Shih
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Cristina Nevado
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
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7
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Preparation and self-aggregation properties of a series of pyrene-imidazolylidene complexes of gold (I). J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121284] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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8
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Ghosh G, Ghosh T, Fernández G. Controlled Supramolecular Polymerization of d
8
Metal Complexes through Pathway Complexity and Seeded Growth. Chempluschem 2020; 85:1022-1033. [DOI: 10.1002/cplu.202000210] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/25/2020] [Indexed: 02/06/2023]
Affiliation(s)
- Goutam Ghosh
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität, Münster Correnstraße, 40 48149 Münster Germany
| | - Tanwistha Ghosh
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität, Münster Correnstraße, 40 48149 Münster Germany
| | - Gustavo Fernández
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität, Münster Correnstraße, 40 48149 Münster Germany
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9
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Leung MY, Leung SYL, Yim KC, Chan AKW, Ng M, Yam VWW. Multiresponsive Luminescent Cationic Cyclometalated Gold(III) Amphiphiles and Their Supramolecular Assembly. J Am Chem Soc 2019; 141:19466-19478. [PMID: 31789511 DOI: 10.1021/jacs.9b10607] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A new class of amphiphilic tridentate cyclometalated gold(III) complexes has been designed and synthesized as luminescent supramolecular building blocks. Positively charged trimethylammonium (-CH2NMe3+) containing alkynyl ligands have been incorporated to introduce the electrostatic interactions. The X-ray crystal structures of two of the complexes have been determined, and the existence of π-π interactions between molecules has been observed. Steady-state and time-resolved absorption and emission studies have been carried out to investigate the nature of the excited states. The complexes are found to exhibit self-assembly properties with the assistance of π-π stacking and hydrophobic interactions and possibly weak Au···Au interaction, resulting in notable emergence of low-energy absorption bands and luminescence changes. The presence of a large hydrophobic moiety is found to be crucial for the formation of aggregates, especially in polar media where hydrophobic interactions play an important role. The nature of the counterion has been shown to have a significant effect on the extent of self-assembly in different media. Upon aggregation, nanofibers are formed in polar media, while nanorods are observed in nonpolar media in one of the representative complexes. Interestingly, a small modification on the alkynyl ligand resulted in the formation of nanoribbons instead. Intriguing luminescence mechanochromic properties have also been observed. This orthogonal and rational molecular design strategy has been shown to be effective in the construction of gold(III)-based smart and multiresponsive materials.
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Affiliation(s)
- Ming-Yi Leung
- Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , People's Republic of China
| | - Sammual Yu-Lut Leung
- Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , People's Republic of China
| | - King-Chin Yim
- Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , People's Republic of China
| | - Alan Kwun-Wa Chan
- Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , People's Republic of China
| | - Maggie Ng
- Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , People's Republic of China
| | - Vivian Wing-Wah Yam
- Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , People's Republic of China
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10
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Leung SKM, Chan AKW, Leung SYL, Leung MY, Yam VWW. Supramolecular assembly of bent dinuclear amphiphilic alkynylplatinum(ii) terpyridine complexes: diverse nanostructures through subtle tuning of the mode of molecular stacking. Chem Sci 2019; 11:499-507. [PMID: 32190269 PMCID: PMC7067253 DOI: 10.1039/c9sc04475b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 11/16/2019] [Indexed: 12/24/2022] Open
Abstract
A new class of bent amphiphilic alkynylplatinum(ii) terpyridine complexes was found to adopt different modes of molecular stacking to give diverse nanostructures.
A new class of bent amphiphilic alkynylplatinum(ii) terpyridine complexes was found to adopt different modes of molecular stacking to give diverse nanostructures. In chlorinated solvents, the complexes aggregate in the presence of water droplets and assist in the formation of porous networks, while in DMSO solutions, they self-assemble to give fibrous nanostructures. The complexes would adopt a head-to-tail tetragonal stacking arrangement, as revealed by X-ray crystallographic studies, computational studies and powder X-ray diffraction (PXRD) studies. Their self-assembly follows a cooperative growth mechanism in DMSO and an isodesmic growth mechanism in DMSO–H2O mixture. The balance between hydrophobic and hydrophilic components of the complex system, in conjunction with the nuclearity and the positioning of the substituents, are found to govern the mode of molecular stacking and the fabrication of precise functional nanostructures. This class of complexes serve as versatile building blocks to construct orderly packed molecular materials and functional materials in a well-controlled manner.
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Affiliation(s)
- Sam Ka-Ming Leung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong .
| | - Alan Kwun-Wa Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong .
| | - Sammual Yu-Lut Leung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong .
| | - Ming-Yi Leung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) , 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)) , Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong .
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11
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Fernandez-Cestau J, Rama RJ, Rocchigiani L, Bertrand B, Lalinde E, Linnolahti M, Bochmann M. Synthesis and Photophysical Properties of Au(III)–Ag(I) Aggregates. Inorg Chem 2019; 58:2020-2030. [DOI: 10.1021/acs.inorgchem.8b02987] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
| | - Raquel J. Rama
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
- Departamento de Química Inorgánica, Universidad de Sevilla, E- 41092 Sevilla, Spain
| | - Luca Rocchigiani
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | - Benoı̂t Bertrand
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | - Elena Lalinde
- Departamento de Química − Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006, Logroño, Spain
| | - Mikko Linnolahti
- Department of Chemistry, University of Eastern Finland, Joensuu Campus, Joensuu, Finland
| | - Manfred Bochmann
- School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
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12
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Bachmann M, Fessler R, Blacque O, Venkatesan K. Towards blue emitting monocyclometalated gold(iii) complexes – synthesis, characterization and photophysical investigations. Dalton Trans 2019; 48:7320-7330. [DOI: 10.1039/c8dt05034a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The electronic properties of cyclometalating ligands and ancillary ligands were successfully tailored to achieve blue emission in monocyclometalated gold(iii) complexes.
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Affiliation(s)
- Michael Bachmann
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - Reto Fessler
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - Olivier Blacque
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - Koushik Venkatesan
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
- Department of Molecular Sciences
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13
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Parker RR, Sarju JP, Whitwood AC, Williams JAG, Lynam JM, Bruce DW. Synthesis, Mesomorphism, and Photophysics of 2,5-Bis(dodecyloxyphenyl)pyridine Complexes of Platinum(IV). Chemistry 2018; 24:19010-19023. [PMID: 30211455 DOI: 10.1002/chem.201804026] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Indexed: 02/02/2023]
Abstract
It has been shown for the first time that the PtIV complex cis-[Pt(N^C-tolpy)2 Cl2 ] (tolpy=2-(4-tolyl)pyridinyl) can be prepared in a one-pot reaction from K2 [PtCl4 ], although analogous complexes containing 2,5-bis(4-dodecyloxyphenyl)pyridine (=HL) could be prepared using existing routes. The resulting complexes cis-[Pt(N^C-L)2 Cl2 ] are liquid crystals and small-angle X-ray scattering suggests formation of a lamellar mesophase. Surprisingly, heating [Pt(κ2 -N^C-L)2 Cl(κ1 -N^C-LH)] also leads to a mesomorphic compound, which results from thermally induced oxidation to cis-[Pt(N^C-L)2 Cl2 ] and what is presumed to be another geometric isomer of the same formula. The PtIV complexes are quite strongly luminescent in deoxygenated solution, with φ≈10 % and show vibrationally structured emission spectra, λmax (0,0)=532 nm, strongly displaced to the red compared to cis-[Pt(N^C-tolpy)Cl2 ]. Long luminescence lifetimes of 230 μs are attributed to a lower degree of metal character in the excited state accompanying the extension of conjugation in the ligand. There is no significant difference between the emission properties of the bromo- and chloro-complexes, in contrast with the known complexes cis-[Pt(N^C-ppy)X2 ], where the quantum yield for X=Br is some 30 times lower than for X=Cl (ppyH=2-phenylpyridine). The lower energy of the excited state in the new complexes probably ensures that deactivating LLCT/LMCT states remain thermally inaccessible, even when X=Br.
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Affiliation(s)
- Rachel R Parker
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Julia P Sarju
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Adrian C Whitwood
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - J A Gareth Williams
- Department of Chemistry, Durham University, University Science Laboratories, South Road, Durham, DH1 3LE, UK
| | - Jason M Lynam
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Duncan W Bruce
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
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14
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Chan MHY, Leung SYL, Yam VWW. Controlling Self-Assembly Mechanisms through Rational Molecular Design in Oligo(p-phenyleneethynylene)-Containing Alkynylplatinum(II) 2,6-Bis(N-alkylbenzimidazol-2′-yl)pyridine Amphiphiles. J Am Chem Soc 2018; 140:7637-7646. [DOI: 10.1021/jacs.8b03628] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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, People’s Republic of China
| | - Sammual Yu-Lut Leung
- 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, People’s Republic of 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, People’s Republic of China
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15
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Affiliation(s)
- Heidi Li-Ki Fu
- 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
| | - 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, P. R. China
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16
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Liebing P, Wang L, Gilje JW, Kühling M, Edelmann FT. A Polymorphic Gold(III) Complex Comprising a Multifunctional Triazolylpropanamide Ligand. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201700456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Phil Liebing
- Department for Chemistry and Applied Biosciences; Swiss Federal Institute of Technology Zurich, ETH Zurich; Vladimir-Prelog-Weg 2 8093 Zurich Switzerland
| | - Ling Wang
- Chemisches Institut; Otto-von-Guericke-Universität Magdeburg; Universitätsplatz 2 39106 Magdeburg Germany
| | - John W. Gilje
- Department of Chemistry & Biochemistry, MSC 4501; James Madison University; 901 Carrier Drive 22807 Harrisonburg Virginia USA
| | - Marcel Kühling
- Chemisches Institut; Otto-von-Guericke-Universität Magdeburg; Universitätsplatz 2 39106 Magdeburg Germany
| | - Frank T. Edelmann
- Chemisches Institut; Otto-von-Guericke-Universität Magdeburg; Universitätsplatz 2 39106 Magdeburg Germany
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17
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Bischoff L, Baudequin C, Hoarau C, Urriolabeitia EP. Organometallic Fluorophores of d 8 Metals (Pd, Pt, Au). ADVANCES IN ORGANOMETALLIC CHEMISTRY 2018. [DOI: 10.1016/bs.adomc.2018.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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18
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Leung FC, Yam VW. Cation‐ and Solvent‐Induced Supramolecular Aggregation Studies of Crown Ether‐Containing Dinuclear Alkynylgold(I) Isocyanide Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700877] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Frankie Chi‐Ming Leung
- 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 SAR P. R. 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 SAR P. R. China
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19
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Siu SKL, Chung CYS, Yam VWW. Amphiphilic oligo(ethylene glycol)- and poly(ethyleneoxide)-block-poly(propylene oxide)-block-poly-(ethylene oxide)-containing cyclometalated alkynylgold(III) complexes: From basic photophysics to self-assembly and stimuli-responsive properties. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.04.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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20
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Ibáñez S, Poyatos M, Peris E. Cation‐Driven Self‐Assembly of a Gold(I)‐Based Metallo‐Tweezer. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/anie.201704359] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Susana Ibáñez
- Institute of Advanced Materials (INAM)Universitat Jaume I Av. Vicente Sos Baynat s/n 12071 Castellón Spain
| | - Macarena Poyatos
- Institute of Advanced Materials (INAM)Universitat Jaume I Av. Vicente Sos Baynat s/n 12071 Castellón Spain
| | - Eduardo Peris
- Institute of Advanced Materials (INAM)Universitat Jaume I Av. Vicente Sos Baynat s/n 12071 Castellón Spain
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21
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Chan KT, Tong GSM, Wan Q, Cheng G, Yang C, Che CM. Strongly Luminescent Cyclometalated Gold(III) Complexes Supported by Bidentate Ligands Displaying Intermolecular Interactions and Tunable Emission Energy. Chem Asian J 2017; 12:2104-2120. [PMID: 28586132 DOI: 10.1002/asia.201700686] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Indexed: 01/23/2023]
Abstract
A series of charge-neutral AuIII complexes, which comprise a dicarbanionic C-deprotonated biphenyl ligand and bidentate ancillary ligands ([Au(C^C)(L^X)]; L^X=β-diketonate and relatives (O^O), quinolinolate and relatives (N^O), and diphosphino (P^P) ligands), were prepared. All the complexes are emissive in degassed CH2 Cl2 solutions and in thin-film samples with Φem up to 18 and 35 %, respectively, except for 5 and 6, which bear (N^O)-type ancillary ligands. Variation of the electronic characteristics of the β-diketonate ancillary ligand was demonstrated to be a viable route for tuning the emission color from blue-green (peak λem at ca. 466 nm for 1 and 2; 501 nm for 4 a and 4 b) to orange (peak λem at 585 nm for 3), in contrast to the common observations that the ancillary ligand has a negligible effect on the excited-state energy of the AuIII complexes reported in the literature. DFT/time-dependent (TD) DFT calculations revealed that the energies of the 3 ππ*(C^C) and the 3 ILCT(O^O) excited states (ILCT=intraligand charge transfer) switch in order on going from O^O=acetylacetonate (acac) to aryl-substituted β-diketonate ligands. Solution-processed and vacuum-deposited organic light-emitting diode (OLED) devices of selected complexes were prepared. The vacuum-deposited OLED fabricated with 2 displays a sky-blue emission with a maximum external quantum efficiency (EQE) of 6.71 % and CIE coordinates of (0.22, 0.40). The crystal structures of 7 and 9 reveal short intermolecular AuIII ⋅⋅⋅AuIII contacts, with intermetal distances of 3.408 and 3.453 Å, respectively. DFT/TDDFT calculations were performed on 7 and 9 to account for the noncovalent interactions. Solid samples of 1, 3, and 9 exhibit excimeric emission at room temperature, which is rarely reported in AuIII complexes.
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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
| | - Qingyun Wan
- 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
| | - Gang Cheng
- 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.,HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong, 518053, 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
| | - 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.,HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong, 518053, China
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22
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Ibáñez S, Poyatos M, Peris E. Cation‐Driven Self‐Assembly of a Gold(I)‐Based Metallo‐Tweezer. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704359] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Susana Ibáñez
- Institute of Advanced Materials (INAM)Universitat Jaume I Av. Vicente Sos Baynat s/n 12071 Castellón Spain
| | - Macarena Poyatos
- Institute of Advanced Materials (INAM)Universitat Jaume I Av. Vicente Sos Baynat s/n 12071 Castellón Spain
| | - Eduardo Peris
- Institute of Advanced Materials (INAM)Universitat Jaume I Av. Vicente Sos Baynat s/n 12071 Castellón Spain
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23
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Zhang Y, Fulong CRP, Hauke CE, Crawley MR, Friedman AE, Cook TR. Photophysical Enhancement of Triplet Emitters by Coordination-Driven Self-Assembly. Chemistry 2017; 23:4532-4536. [PMID: 28191708 DOI: 10.1002/chem.201700614] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Indexed: 01/06/2023]
Abstract
The quantum yields of organic fluorophores used as donors in coordination-driven self-assembly often suffer from the heavy atom effect of nearby metal sites. Here, the role of intersystem crossing from a deactivating process to one that delivers emissive triplet states was reversed. A phosphorescent trans bis-N-heterocyclic carbene platinum(II) compound, Pt(dhim)2 (C≡C-4-py)2 (D1; dhim=1,3-dihexyl-2-H-imidazol-2-ylidene), was used along with other linear donors 4,4'-bipyridine (D2) and 1,4-bis(4-pyridyl ethynyl)benzene (D3) in self-assembly reactions with Pt(dtbpy)X2 acceptors (dtbpy=4,4'-di-tert-butyl-2,2'-bipyridine) to afford three metallacycles. Photophysical investigations revealed that, although the building blocks used to construct M1 have relatively low quantum yields (Φ=1.2 and <1 % for D1 and 2, respectively), the metallacycle has a quantum yield of 14 %. This increase reflects a change in radiative rate constant from 3.6×104 s-1 for D1 to 2.1×105 s-1 for M1.
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Affiliation(s)
- Yuzhen Zhang
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
| | - Cressa Ria P Fulong
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
| | - Cory E Hauke
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
| | - Matthew R Crawley
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
| | - Alan E Friedman
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
| | - Timothy R Cook
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
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