pH-Responsive Emission of Novel Water-Soluble Polymeric Iridium(III) Complexes
The synthesis and characterization of water-soluble copolymers containing <i>N,N</i>-dimethylacrylamide (DMAM) and a vinylic monomer containing an Iridium(III), Ir(III), complex substituted with the quinoline-based unit 2-(pyridin-2-ylo)-6-styrene-4-phenylquinoline (VQPy) as ligand are r...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-03-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/12/6/927 |
| _version_ | 1827627079278002176 |
|---|---|
| author | Dafnianna Tsakaraki Aikaterini K. Andreopoulou Georgios Bokias |
| author_facet | Dafnianna Tsakaraki Aikaterini K. Andreopoulou Georgios Bokias |
| author_sort | Dafnianna Tsakaraki |
| collection | DOAJ |
| description | The synthesis and characterization of water-soluble copolymers containing <i>N,N</i>-dimethylacrylamide (DMAM) and a vinylic monomer containing an Iridium(III), Ir(III), complex substituted with the quinoline-based unit 2-(pyridin-2-ylo)-6-styrene-4-phenylquinoline (VQPy) as ligand are reported. These copolymers were prepared through pre- or post-polymerization complexation of Ir(III) with the VQPy units. The first methodology led to copolymer <b>P1</b> having fully complexed VQPy units, whereas the latter methodology allowed the preparation of terpolymers containing free and Ir(III)-complexed VQPy units (copolymer <b>P2</b>). The optical properties of the copolymers were studied in detail through UV-Vis and photoluminescence spectroscopy in aqueous solution. It is shown that the metal-to-ligand charge transfer (ΜLCT) emission is prevailing in the case of <b>P1</b>, regardless of pH. In contrast, in the case of terpolymer <b>P2</b> the MLCT emission of the Ir(III) complex is combined with the pH-responsive emission of free VQPy units, leading to characteristic pH-responsive color changes under UV illumination in the acidic pH region. |
| first_indexed | 2024-03-09T13:07:26Z |
| format | Article |
| id | doaj.art-32d6a10affd84da28ffe69fc44e969a1 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T13:07:26Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-32d6a10affd84da28ffe69fc44e969a12023-11-30T21:45:39ZengMDPI AGNanomaterials2079-49912022-03-0112692710.3390/nano12060927pH-Responsive Emission of Novel Water-Soluble Polymeric Iridium(III) ComplexesDafnianna Tsakaraki0Aikaterini K. Andreopoulou1Georgios Bokias2Department of Chemistry, University of Patras, GR 26504 Patras, GreeceDepartment of Chemistry, University of Patras, GR 26504 Patras, GreeceDepartment of Chemistry, University of Patras, GR 26504 Patras, GreeceThe synthesis and characterization of water-soluble copolymers containing <i>N,N</i>-dimethylacrylamide (DMAM) and a vinylic monomer containing an Iridium(III), Ir(III), complex substituted with the quinoline-based unit 2-(pyridin-2-ylo)-6-styrene-4-phenylquinoline (VQPy) as ligand are reported. These copolymers were prepared through pre- or post-polymerization complexation of Ir(III) with the VQPy units. The first methodology led to copolymer <b>P1</b> having fully complexed VQPy units, whereas the latter methodology allowed the preparation of terpolymers containing free and Ir(III)-complexed VQPy units (copolymer <b>P2</b>). The optical properties of the copolymers were studied in detail through UV-Vis and photoluminescence spectroscopy in aqueous solution. It is shown that the metal-to-ligand charge transfer (ΜLCT) emission is prevailing in the case of <b>P1</b>, regardless of pH. In contrast, in the case of terpolymer <b>P2</b> the MLCT emission of the Ir(III) complex is combined with the pH-responsive emission of free VQPy units, leading to characteristic pH-responsive color changes under UV illumination in the acidic pH region.https://www.mdpi.com/2079-4991/12/6/927Iridium polymeric complexeswater-soluble copolymerswater-soluble metallocomplexespH-sensorsquinoline-pyridine ligandphotoluminescence |
| spellingShingle | Dafnianna Tsakaraki Aikaterini K. Andreopoulou Georgios Bokias pH-Responsive Emission of Novel Water-Soluble Polymeric Iridium(III) Complexes Nanomaterials Iridium polymeric complexes water-soluble copolymers water-soluble metallocomplexes pH-sensors quinoline-pyridine ligand photoluminescence |
| title | pH-Responsive Emission of Novel Water-Soluble Polymeric Iridium(III) Complexes |
| title_full | pH-Responsive Emission of Novel Water-Soluble Polymeric Iridium(III) Complexes |
| title_fullStr | pH-Responsive Emission of Novel Water-Soluble Polymeric Iridium(III) Complexes |
| title_full_unstemmed | pH-Responsive Emission of Novel Water-Soluble Polymeric Iridium(III) Complexes |
| title_short | pH-Responsive Emission of Novel Water-Soluble Polymeric Iridium(III) Complexes |
| title_sort | ph responsive emission of novel water soluble polymeric iridium iii complexes |
| topic | Iridium polymeric complexes water-soluble copolymers water-soluble metallocomplexes pH-sensors quinoline-pyridine ligand photoluminescence |
| url | https://www.mdpi.com/2079-4991/12/6/927 |
| work_keys_str_mv | AT dafniannatsakaraki phresponsiveemissionofnovelwatersolublepolymericiridiumiiicomplexes AT aikaterinikandreopoulou phresponsiveemissionofnovelwatersolublepolymericiridiumiiicomplexes AT georgiosbokias phresponsiveemissionofnovelwatersolublepolymericiridiumiiicomplexes |