1
|
Silalahi IH, Prokhorov AM, Tanner T, Cowling SJ, Whitwood AC, Bruce DW. The liquid-crystalline and luminescence properties of polycatenar diphenylpyridine complexes of Palladium(II). J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
2
|
Cuerva C, Cano M, Lodeiro C. Advanced Functional Luminescent Metallomesogens: The Key Role of the Metal Center. Chem Rev 2021; 121:12966-13010. [PMID: 34370446 DOI: 10.1021/acs.chemrev.1c00011] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The use of liquid crystals for the fabrication of displays incorporated in technological devices (TVs, calculators, screens of eBook's, tablets, watches) demonstrates the relevance that these materials have had in our way of living. However, society evolves, and improved devices are looked for as we create a more efficient and safe technology. In this context, metallomesogens can behave as multifunctional materials because they can combine the fluidic state of the mesophases with properties such as photo and electroluminescence, which offers new exciting possibilities in the field of optoelectronics, energy, environment, and even biomedicine. Herein, it has been established the role of the molecular geometry induced by the metal center in metallomesogens to achieve the self-assembly required in the liquid-crystalline mesophase. Likewise, the effect of the coordination environment in metallomesogens has been further analyzed because of its importance to induce mesomorphism. The structural analysis has been combined with an in-depth discussion of the properties of these materials, including their current and potential future applications. This review will provide a solid background to stimulate the development of novel and attractive metallomesogens that allow designing improved optoelectronic and microelectronic components. Additionally, nanoscience and nanotechnology could be used as a tool to approach the design of nanosystems based on luminescent metallomesogens for use in bioimaging or drug delivery.
Collapse
Affiliation(s)
- Cristián Cuerva
- BIOSCOPE Research Group, LAQV@REQUIMTE Chemistry Department, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal
| | - Mercedes Cano
- Department of Inorganic Chemistry, Complutense University of Madrid, Ciudad Universitaria, 28040 Madrid, Spain
| | - Carlos Lodeiro
- BIOSCOPE Research Group, LAQV@REQUIMTE Chemistry Department, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal.,PROTEOMASS Scientific Society, Rua dos Inventores, Madam Parque, Caparica Campus, 2829-516 Caparica, Portugal
| |
Collapse
|
3
|
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.
Collapse
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
| |
Collapse
|
4
|
Zhang S, Luo K, Geng H, Ni H, Wang H, Li Q. New phosphorescent platinum(ii) complexes with tetradentate C*N^N*C ligands: liquid crystallinity and polarized emission. Dalton Trans 2017; 46:899-906. [DOI: 10.1039/c6dt04502b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel tetradentate cyclometalated platinum(ii) complexes bearing two peripheral alkoxy chains can self-assemble into thermotropic smectic liquid crystalline complexes and show a polarized emission.
Collapse
Affiliation(s)
- Shilin Zhang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610068
- China
| | - Kaijun Luo
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610068
- China
| | - Hao Geng
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610068
- China
| | - Hailiang Ni
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610068
- China
| | - Haifeng Wang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610068
- China
| | - Quan Li
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610068
- China
| |
Collapse
|
5
|
Kumar NSS, Shafikov MZ, Whitwood AC, Donnio B, Karadakov PB, Kozhevnikov VN, Bruce DW. Mesomorphism and Photophysics of Some Metallomesogens Based on Hexasubstituted 2,2':6', 2''-Terpyridines. Chemistry 2016; 22:8215-33. [PMID: 27138194 DOI: 10.1002/chem.201505072] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 03/23/2016] [Indexed: 11/06/2022]
Abstract
The luminescent and mesomorphic properties of a series of metal complexes based on hexacatenar 2,2':6',2''-terpyridines are investigated using experimental methods and density functional theory (DFT). Two types of ligand are examined, namely 5,5''-di(3,4,5-trialkoxyphenyl)terpyridine with or without a fused cyclopentene ring on each pyridine and their complexes were prepared with the following transition metals: Zn(II) , Co(III) , Rh(III) , Ir(III) , Eu(III) and Dy(III) . The exact geometry of some of these complexes was determined by single X-ray diffraction. All complexes with long alkyl chains were found to be liquid crystalline, which property was induced on complexation. The liquid-crystalline behaviour of the complexes was studied by polarising optical microscopy and small-angle X-ray diffraction. Some of the transition metal complexes (for example, those with Zn(II) and Ir(III) ) are luminescent in solution, the solid state and the mesophase; their photophysical properties were studied both experimentally and using DFT methods (M06-2X and B3LYP).
Collapse
Affiliation(s)
- N S Saleesh Kumar
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Marsel Z Shafikov
- Department of TOS, Institute of Chemical Engineering, Ural Federal University, 19 Mira str., Ekaterinburg, 620002, Russia
| | - Adrian C Whitwood
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Bertrand Donnio
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg (UMR 7504), 23 rue du Loess BP 43, 67034, Strasbourg Cedex 2, France
| | - Peter B Karadakov
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
| | - Valery N Kozhevnikov
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.,Department of Applied Sciences, Northumbria University, Newcastle-Upon-Tyne, NE1 8ST, UK
| | - Duncan W Bruce
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK.
| |
Collapse
|
6
|
Kim DY, Kang DG, Lee MH, Kim JS, Lee CR, Jeong KU. A photo-responsive metallomesogen for an optically and electrically tunable polarized light modulator. Chem Commun (Camb) 2016; 52:12821-12824. [DOI: 10.1039/c6cc06901k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A palladium(ii)-based metallomesogen containing the photo-responsive azobenzene was newly synthesized and was demonstrated to be an optically and electrically tunable polarized light modulator.
Collapse
Affiliation(s)
- Dae-Yoon Kim
- Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics
- Chonbuk National University
- Jeonju
- Korea
| | - Dong-Gue Kang
- Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics
- Chonbuk National University
- Jeonju
- Korea
| | - Myong-Hoon Lee
- Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics
- Chonbuk National University
- Jeonju
- Korea
| | - Jin-Soo Kim
- Division of Advanced Materials Engineering
- Chonbuk National University
- Jeonju
- Korea
| | - Cheul-Ro Lee
- Division of Advanced Materials Engineering
- Chonbuk National University
- Jeonju
- Korea
| | - Kwang-Un Jeong
- Department of Polymer-Nano Science and Technology & Department of Flexible and Printable Electronics
- Chonbuk National University
- Jeonju
- Korea
| |
Collapse
|
7
|
Wang Y, Cabry CP, Xiao M, Male L, Cowling SJ, Bruce DW, Shi J, Zhu W, Baranoff E. Blue and Green Phosphorescent Liquid-Crystalline Iridium Complexes with High Hole Mobility. Chemistry 2015; 22:1618-21. [DOI: 10.1002/chem.201504669] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Yafei Wang
- School of Chemistry; University of Birmingham; Birmingham B15 2TT (UK
- Department of Chemistry; Key Lab of Environment-Friendly Chemistry and Application in the Ministry of Education, Xiangtan University; Xiangtan 411105 (P.R. China
| | | | - ManJun Xiao
- Department of Chemistry; Key Lab of Environment-Friendly Chemistry and Application in the Ministry of Education, Xiangtan University; Xiangtan 411105 (P.R. China
| | - Louise Male
- School of Chemistry; University of Birmingham; Birmingham B15 2TT (UK
| | - Stephen J. Cowling
- 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
| | - Junwei Shi
- Department of Chemistry; Key Lab of Environment-Friendly Chemistry and Application in the Ministry of Education, Xiangtan University; Xiangtan 411105 (P.R. China
| | - Weiguo Zhu
- Department of Chemistry; Key Lab of Environment-Friendly Chemistry and Application in the Ministry of Education, Xiangtan University; Xiangtan 411105 (P.R. China
| | - Etienne Baranoff
- School of Chemistry; University of Birmingham; Birmingham B15 2TT (UK
| |
Collapse
|
8
|
Yam VWW, Au VKM, Leung SYL. Light-Emitting Self-Assembled Materials Based on d8 and d10 Transition Metal Complexes. Chem Rev 2015; 115:7589-728. [DOI: 10.1021/acs.chemrev.5b00074] [Citation(s) in RCA: 1065] [Impact Index Per Article: 118.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- 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
| | - Vonika Ka-Man Au
- 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
| | - 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, P. R. China
| |
Collapse
|
9
|
Micutz M, Iliş M, Staicu T, Dumitraşcu F, Pasuk I, Molard Y, Roisnel T, Cîrcu V. Luminescent liquid crystalline materials based on palladium(ii) imine derivatives containing the 2-phenylpyridine core. Dalton Trans 2014; 43:1151-61. [DOI: 10.1039/c3dt52137k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
10
|
Sato T, Awano H, Katagiri H, Pu Y, Takahashi T, Yonetake K. Orientation and Polarized Optical Emission Properties of Platinum(II) Complexes in Smectic Liquid Crystals. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201388] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Takeshi Sato
- Graduate School of Science and Engineering, Yamagata University, 4‐3‐16, Jonan, Yonezawa, Japan, http://www2.yz.yamagata‐u.ac.jp/index‐eng.html
| | - Hiroshi Awano
- Graduate School of Science and Engineering, Yamagata University, 4‐3‐16, Jonan, Yonezawa, Japan, http://www2.yz.yamagata‐u.ac.jp/index‐eng.html
| | - Hiroshi Katagiri
- Graduate School of Science and Engineering, Yamagata University, 4‐3‐16, Jonan, Yonezawa, Japan, http://www2.yz.yamagata‐u.ac.jp/index‐eng.html
| | - Yong‐Jin Pu
- Graduate School of Science and Engineering, Yamagata University, 4‐3‐16, Jonan, Yonezawa, Japan, http://www2.yz.yamagata‐u.ac.jp/index‐eng.html
| | - Tatsuhiro Takahashi
- Graduate School of Science and Engineering, Yamagata University, 4‐3‐16, Jonan, Yonezawa, Japan, http://www2.yz.yamagata‐u.ac.jp/index‐eng.html
| | - Koichiro Yonetake
- Graduate School of Science and Engineering, Yamagata University, 4‐3‐16, Jonan, Yonezawa, Japan, http://www2.yz.yamagata‐u.ac.jp/index‐eng.html
| |
Collapse
|