Spectroscopic, Electrochemical and DFT Studies of Phosphorescent Homoleptic Cyclometalated Iridium(III) Complexes Based on Substituted 4-Fluorophenylvinyl- and 4-Methoxyphenylvinylquinolines
This study reports the synthesis and comparative investigation of the substituent effects of a new series of highly luminescent homoleptic tris-cyclometalated iridium(III) complexes of the type [Ir(N˄C)3]. These are based on two ligand type derivatives comprising of 4-fluorophenylvinylquinolines and...
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MDPI AG
2017-09-01
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| Online Access: | https://www.mdpi.com/1996-1944/10/10/1061 |
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doaj-be5668ac4ea34358a78f2d75c5c828772020-11-25T00:29:48ZengMDPI AGMaterials1996-19442017-09-011010106110.3390/ma10101061ma10101061Spectroscopic, Electrochemical and DFT Studies of Phosphorescent Homoleptic Cyclometalated Iridium(III) Complexes Based on Substituted 4-Fluorophenylvinyl- and 4-MethoxyphenylvinylquinolinesAdewale O. Adeloye0Malose J. Mphahlele1Abolanle S. Adekunle2Lydia Rhyman3Ponnadurai Ramasami4Department of Chemistry, College of Science, Engineering and Technology, University of South Africa, Private Bag X6, Florida 1710, South AfricaDepartment of Chemistry, College of Science, Engineering and Technology, University of South Africa, Private Bag X6, Florida 1710, South AfricaDepartment of Chemistry, Faculty of Science, Obafemi Awolowo University, Ile-Ife, NigeriaComputational Chemistry Group, Department of Chemistry, Faculty of Science, University of Mauritius, Réduit 80837, MauritiusComputational Chemistry Group, Department of Chemistry, Faculty of Science, University of Mauritius, Réduit 80837, MauritiusThis study reports the synthesis and comparative investigation of the substituent effects of a new series of highly luminescent homoleptic tris-cyclometalated iridium(III) complexes of the type [Ir(N˄C)3]. These are based on two ligand type derivatives comprising of 4-fluorophenylvinylquinolines and 4-methoxyphenylvinylquinolines with electron-donating and/or electron-withdrawing groups as aryl substituents at 2-position. The structures of the ligands and their complexes were characterized by means of FT-IR, UV-Vis and NMR spectrometry complemented with photoluminescence and cyclic voltammetry. The photophysical properties of 2-aryl-4-(4-fluorophenylvinyl)quinoline and its corresponding complex were also studied using the density functional theory method. The photoluminescent properties of the ligands and the corresponding complexes showed high fluorescent intensities and quantum yields in solvents of different polarities. The photoluminescence spectra of the complexes in solid film, showed common transmission curves at longer wavelengths maximum (λem = 697 nm) possibly originating from the interference of scattered light of higher-order transmission of monochromators.https://www.mdpi.com/1996-1944/10/10/1061cyclometalated iridium(III) complexes4-fluorophenylvinylquinoline4-methoxyphenylvinylquinolinephotophysical propertiesphosphorescenceelectrochemistryDFT |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Adewale O. Adeloye Malose J. Mphahlele Abolanle S. Adekunle Lydia Rhyman Ponnadurai Ramasami |
| spellingShingle |
Adewale O. Adeloye Malose J. Mphahlele Abolanle S. Adekunle Lydia Rhyman Ponnadurai Ramasami Spectroscopic, Electrochemical and DFT Studies of Phosphorescent Homoleptic Cyclometalated Iridium(III) Complexes Based on Substituted 4-Fluorophenylvinyl- and 4-Methoxyphenylvinylquinolines Materials cyclometalated iridium(III) complexes 4-fluorophenylvinylquinoline 4-methoxyphenylvinylquinoline photophysical properties phosphorescence electrochemistry DFT |
| author_facet |
Adewale O. Adeloye Malose J. Mphahlele Abolanle S. Adekunle Lydia Rhyman Ponnadurai Ramasami |
| author_sort |
Adewale O. Adeloye |
| title |
Spectroscopic, Electrochemical and DFT Studies of Phosphorescent Homoleptic Cyclometalated Iridium(III) Complexes Based on Substituted 4-Fluorophenylvinyl- and 4-Methoxyphenylvinylquinolines |
| title_short |
Spectroscopic, Electrochemical and DFT Studies of Phosphorescent Homoleptic Cyclometalated Iridium(III) Complexes Based on Substituted 4-Fluorophenylvinyl- and 4-Methoxyphenylvinylquinolines |
| title_full |
Spectroscopic, Electrochemical and DFT Studies of Phosphorescent Homoleptic Cyclometalated Iridium(III) Complexes Based on Substituted 4-Fluorophenylvinyl- and 4-Methoxyphenylvinylquinolines |
| title_fullStr |
Spectroscopic, Electrochemical and DFT Studies of Phosphorescent Homoleptic Cyclometalated Iridium(III) Complexes Based on Substituted 4-Fluorophenylvinyl- and 4-Methoxyphenylvinylquinolines |
| title_full_unstemmed |
Spectroscopic, Electrochemical and DFT Studies of Phosphorescent Homoleptic Cyclometalated Iridium(III) Complexes Based on Substituted 4-Fluorophenylvinyl- and 4-Methoxyphenylvinylquinolines |
| title_sort |
spectroscopic, electrochemical and dft studies of phosphorescent homoleptic cyclometalated iridium(iii) complexes based on substituted 4-fluorophenylvinyl- and 4-methoxyphenylvinylquinolines |
| publisher |
MDPI AG |
| series |
Materials |
| issn |
1996-1944 |
| publishDate |
2017-09-01 |
| description |
This study reports the synthesis and comparative investigation of the substituent effects of a new series of highly luminescent homoleptic tris-cyclometalated iridium(III) complexes of the type [Ir(N˄C)3]. These are based on two ligand type derivatives comprising of 4-fluorophenylvinylquinolines and 4-methoxyphenylvinylquinolines with electron-donating and/or electron-withdrawing groups as aryl substituents at 2-position. The structures of the ligands and their complexes were characterized by means of FT-IR, UV-Vis and NMR spectrometry complemented with photoluminescence and cyclic voltammetry. The photophysical properties of 2-aryl-4-(4-fluorophenylvinyl)quinoline and its corresponding complex were also studied using the density functional theory method. The photoluminescent properties of the ligands and the corresponding complexes showed high fluorescent intensities and quantum yields in solvents of different polarities. The photoluminescence spectra of the complexes in solid film, showed common transmission curves at longer wavelengths maximum (λem = 697 nm) possibly originating from the interference of scattered light of higher-order transmission of monochromators. |
| topic |
cyclometalated iridium(III) complexes 4-fluorophenylvinylquinoline 4-methoxyphenylvinylquinoline photophysical properties phosphorescence electrochemistry DFT |
| url |
https://www.mdpi.com/1996-1944/10/10/1061 |
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