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Criscuolo V, Prontera CT, Pavone M, Crescenzi O, Maglione MG, Tassini P, Lettieri S, Maddalena P, Borriello C, Minarini C, Manini P. Luminescent cis-Iridium(III) Complex Based on a Bis(6,7-dimethoxy-3,4-dihydroisoquinoline) Platform Featuring an Unusual cis Orientation of the C ∧N Ligands: From a Theoretical Approach to a Deep Red LEEC Device. ACS OMEGA 2019; 4:2009-2018. [PMID: 31459452 PMCID: PMC6648618 DOI: 10.1021/acsomega.8b02859] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 01/17/2019] [Indexed: 06/10/2023]
Abstract
By pursuing the strategy of manipulating natural compounds to obtain functional materials, in this work, we report on the synthesis and characterization of a luminescent cationic iridium complex (cis-1), designed starting from the catecholic neurotransmitter dopamine, exhibiting the unusual cis arrangement of the C∧N ligands. Through an integrated experimental and theoretical approach, it was possible to delineate the optoelectronic properties of cis-1. In detail, (a) a series of absorption maxima in the range 300-400 nm was assigned to metal-to-ligand charge transfer and weak and broad absorption maxima at longer wavelengths (400-500 nm) were ascribable to spin-forbidden transitions with a mixed character; (b) there was an intense red phosphorescence with emission set in the range 580-710 nm; and (c) a highest occupied molecular orbital was mainly localized on the metal and the 2-phenylpiridine ligand and a lowest unoccupied molecular orbital was localized on the N∧N ligand, with a ΔH-L set at 2.20 eV. This investigation allowed the design of light-emitting electrochemical cell (LEEC) devices endowed with good performance. The poor literature reporting on the use of cis-iridium(III) complexes in LEECs prompted us to investigate the role played by the selected cathode and the thickness of the emitting layer, as well as the doping effect exerted by ionic liquids on the performance of the devices. All the devices exhibited a deep red emission, in some cases, quite near the pure color (devices #1, #4, and #8), expanding the panorama of the iridium-based red-to-near-infrared LEEC devices. The characteristics of the devices, such as the brightness reaching values of 162 cd/m2 for device #7, suggested that the performances of cis-1 are comparable to those of trans isomers, opening new perspective toward designing a new set of luminescent materials for optoelectronic devices.
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Affiliation(s)
- Valeria Criscuolo
- Department
of Chemical Sciences and Department of Physics “E.
Pancini”, University of Naples Federico
II, via Cintia 4, I-80126 Napoli, Italy
| | - Carmela T. Prontera
- Department
of Chemical Sciences and Department of Physics “E.
Pancini”, University of Naples Federico
II, via Cintia 4, I-80126 Napoli, Italy
| | - Michele Pavone
- Department
of Chemical Sciences and Department of Physics “E.
Pancini”, University of Naples Federico
II, via Cintia 4, I-80126 Napoli, Italy
| | - Orlando Crescenzi
- Department
of Chemical Sciences and Department of Physics “E.
Pancini”, University of Naples Federico
II, via Cintia 4, I-80126 Napoli, Italy
| | - Maria G. Maglione
- Laboratory
of Nanomaterials and Devices (SSPT-PROMAS-NANO), ENEA—C.R. Portici, Piazzale Enrico Fermi 1, I-80055 Portici, Napoli, Italy
| | - Paolo Tassini
- Laboratory
of Nanomaterials and Devices (SSPT-PROMAS-NANO), ENEA—C.R. Portici, Piazzale Enrico Fermi 1, I-80055 Portici, Napoli, Italy
| | - Stefano Lettieri
- National
Research Council, Institute for Applied
Sciences and Intelligent Systems “E. Caianiello” (CNR-ISASI), Via Campi Flegrei 34, I-80078 Pozzuoli, Napoli, Italy
| | - Pasqualino Maddalena
- Department
of Chemical Sciences and Department of Physics “E.
Pancini”, University of Naples Federico
II, via Cintia 4, I-80126 Napoli, Italy
| | - Carmela Borriello
- Laboratory
of Nanomaterials and Devices (SSPT-PROMAS-NANO), ENEA—C.R. Portici, Piazzale Enrico Fermi 1, I-80055 Portici, Napoli, Italy
| | - Carla Minarini
- Laboratory
of Nanomaterials and Devices (SSPT-PROMAS-NANO), ENEA—C.R. Portici, Piazzale Enrico Fermi 1, I-80055 Portici, Napoli, Italy
| | - Paola Manini
- Department
of Chemical Sciences and Department of Physics “E.
Pancini”, University of Naples Federico
II, via Cintia 4, I-80126 Napoli, Italy
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Ma Y, Dong Y, Zou L, Shen L, Liu S, Liu S, Huang W, Zhao Q, Wong W. A Probe Based on a Soft Salt Complex for Ratiometric and Lifetime Imaging of Variations in Intracellular Oxygen Content. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800250] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yun Ma
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications (NUPT) 210023 Nanjing China
- Institute of Molecular Functional Materials and Department of Chemistry Hong Kong Baptist University Waterloo Road, Kowloon Tong Hong Kong P. R. China
| | - Yafang Dong
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications (NUPT) 210023 Nanjing China
| | - Liang Zou
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications (NUPT) 210023 Nanjing China
| | - Liang Shen
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications (NUPT) 210023 Nanjing China
| | - Suyi Liu
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications (NUPT) 210023 Nanjing China
| | - Shujuan Liu
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications (NUPT) 210023 Nanjing China
| | - Wei Huang
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications (NUPT) 210023 Nanjing China
| | - Qiang Zhao
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications (NUPT) 210023 Nanjing China
| | - Wai‐Yeung Wong
- Institute of Molecular Functional Materials and Department of Chemistry Hong Kong Baptist University Waterloo Road, Kowloon Tong Hong Kong P. R. China
- Department of Applied Biology and Chemical Technology,
- The Hong Kong Polytechnic University Hung Hom Hong Kong P. R. China
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4
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Esteruelas MA, Oñate E, Palacios AU. Selective Synthesis and Photophysical Properties of Phosphorescent Heteroleptic Iridium(III) Complexes with Two Different Bidentate Groups and Two Different Monodentate Ligands. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00108] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miguel A. Esteruelas
- Departamento de Química
Inorgánica, Instituto de Síntesis Química y Catálisis
Homogénea (ISQCH), Centro de Innovación en Química
Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento de Química
Inorgánica, Instituto de Síntesis Química y Catálisis
Homogénea (ISQCH), Centro de Innovación en Química
Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Adrián U. Palacios
- Departamento de Química
Inorgánica, Instituto de Síntesis Química y Catálisis
Homogénea (ISQCH), Centro de Innovación en Química
Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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5
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Ma D, Tsuboi T, Qiu Y, Duan L. Recent Progress in Ionic Iridium(III) Complexes for Organic Electronic Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1603253. [PMID: 27869353 DOI: 10.1002/adma.201603253] [Citation(s) in RCA: 127] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 08/19/2016] [Indexed: 06/06/2023]
Abstract
Ionic iridium(III) complexes are emerging with great promise for organic electronic devices, owing to their unique features such as ease of molecular design and synthesis, excellent photophysical properties, superior redox stability, and highly efficient emissions of virtually all colors. Here, recent progress on new material design, regarding photo- and electroluminescence is highlighted, including several interesting topics such as: i) color-tuning strategies of cationic iridium(III) complexes, ii) widespread utilization in phosphorescent light-emitting devices fabricated by not only solution processes but also vacuum evaporation deposition, and iii) potential applications in data record, storage, and sercurity. Results on anionic iridium(III) complexes and "soft salts" are also discussed, indicating a new related subject. Finally, a brief outlook is suggested, pointing out that ionic iridium(III) complexes should play a more significant role in future organic electronic materials technology.
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Affiliation(s)
- Dongxin Ma
- Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Taiju Tsuboi
- Kyoto Sangyo University, Kamigamo, Kita-ku, Kyoto, 603-8555, Japan
| | - Yong Qiu
- Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Lian Duan
- Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
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6
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Yoshinaga H, Asada T, Koseki S, Yagi S, Matsushita T. Spin–orbit coupling analyses of phosphorescence: the effects of cyclometalated ligand replacement in fac-Ir(ppy)3with various bpy ligands on blue phosphorescence. RSC Adv 2016. [DOI: 10.1039/c6ra07778a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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7
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Ertl CD, Cerdá J, Junquera-Hernández JM, Pertegás A, Bolink HJ, Constable EC, Neuburger M, Ortí E, Housecroft CE. Colour tuning by the ring roundabout: [Ir(C^N)2(N^N)]+ emitters with sulfonyl-substituted cyclometallating ligands. RSC Adv 2015. [DOI: 10.1039/c5ra07940c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of fluorine-free blue and green emitting iridium complexes containing sulfone-substituted cyclometallating and pyrazolyl-pyridine ancillary ligands has been synthesized and their properties investigated.
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Affiliation(s)
- Cathrin D. Ertl
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| | - Jesús Cerdá
- Instituto de Ciencia Molecular
- Universidad de Valencia
- 46980-Paterna
- Spain
| | | | - Antonio Pertegás
- Instituto de Ciencia Molecular
- Universidad de Valencia
- 46980-Paterna
- Spain
| | - Henk J. Bolink
- Instituto de Ciencia Molecular
- Universidad de Valencia
- 46980-Paterna
- Spain
| | | | - Markus Neuburger
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| | - Enrique Ortí
- Instituto de Ciencia Molecular
- Universidad de Valencia
- 46980-Paterna
- Spain
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8
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Koseki S, Yoshinaga H, Asada T, Matsushita T. Spin–orbit coupling analyses of phosphorescent processes in Ir(Zppy)3 (Z = NH2, NO2 and CN). RSC Adv 2015. [DOI: 10.1039/c5ra04487a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Appropriate combinations of substituents provide brighter blue-color emission in OLEDs. The present MCSCF + SOCI + SOC calculations suggest that the best material for blue-color emission is fac-Ir(5-NO2ppy)3 or fac-Ir(5-NO2-4,6-dfppy)3, or practically fac-Ir(5-CN-3,4,6-tfppy)3.
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Affiliation(s)
- Shiro Koseki
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Sakai
- Japan
| | - Harunobu Yoshinaga
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Sakai
- Japan
| | - Toshio Asada
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Sakai
- Japan
| | - Takeshi Matsushita
- The Research Institute for Molecular Electronic Devices (RIMED)
- Osaka Prefecture University
- Sakai 599-8531
- Japan
- JNC Petrochemical Corporation
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