2
|
Kenny T, Lamare S, Aly SM, Fortin D, Brisard G, Harvey PD. Reduced and Oxidized Forms of the Pt-Organometallic Version of Polyaniline. Inorg Chem 2012; 51:13081-95. [DOI: 10.1021/ic300775n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Tommy Kenny
- Département
de Chimie, Université de
Sherbrooke, Sherbrooke, Quebec J1K 2R, Canada
| | - Simon Lamare
- Département
de Chimie, Université de
Sherbrooke, Sherbrooke, Quebec J1K 2R, Canada
| | - Shawkat M. Aly
- Département
de Chimie, Université de
Sherbrooke, Sherbrooke, Quebec J1K 2R, Canada
| | - Daniel Fortin
- Département
de Chimie, Université de
Sherbrooke, Sherbrooke, Quebec J1K 2R, Canada
| | - Gessie Brisard
- Département
de Chimie, Université de
Sherbrooke, Sherbrooke, Quebec J1K 2R, Canada
| | - Pierre D. Harvey
- Département
de Chimie, Université de
Sherbrooke, Sherbrooke, Quebec J1K 2R, Canada
| |
Collapse
|
5
|
Gagnon K, Mohammed Aly S, Brisach-Wittmeyer A, Bellows D, Bérubé JF, Caron L, Abd-El-Aziz AS, Fortin D, Harvey PD. Conjugated Oligomers and Polymers of cis- and trans-Platinum(II)-para- and ortho-bis(ethynylbenzene)quinone Diimine. Organometallics 2008. [DOI: 10.1021/om7010563] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Karl Gagnon
- Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, Canada J1K 2R1, and Department of Chemistry, University of British Columbia, Okanagan, 3333 University Way, Kelowna, BC, Canada V1V 1V7
| | - Shawkat Mohammed Aly
- Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, Canada J1K 2R1, and Department of Chemistry, University of British Columbia, Okanagan, 3333 University Way, Kelowna, BC, Canada V1V 1V7
| | - Anne Brisach-Wittmeyer
- Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, Canada J1K 2R1, and Department of Chemistry, University of British Columbia, Okanagan, 3333 University Way, Kelowna, BC, Canada V1V 1V7
| | - Diana Bellows
- Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, Canada J1K 2R1, and Department of Chemistry, University of British Columbia, Okanagan, 3333 University Way, Kelowna, BC, Canada V1V 1V7
| | - Jean-François Bérubé
- Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, Canada J1K 2R1, and Department of Chemistry, University of British Columbia, Okanagan, 3333 University Way, Kelowna, BC, Canada V1V 1V7
| | - Laurence Caron
- Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, Canada J1K 2R1, and Department of Chemistry, University of British Columbia, Okanagan, 3333 University Way, Kelowna, BC, Canada V1V 1V7
| | - Alaa S. Abd-El-Aziz
- Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, Canada J1K 2R1, and Department of Chemistry, University of British Columbia, Okanagan, 3333 University Way, Kelowna, BC, Canada V1V 1V7
| | - Daniel Fortin
- Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, Canada J1K 2R1, and Department of Chemistry, University of British Columbia, Okanagan, 3333 University Way, Kelowna, BC, Canada V1V 1V7
| | - Pierre D. Harvey
- Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, Canada J1K 2R1, and Department of Chemistry, University of British Columbia, Okanagan, 3333 University Way, Kelowna, BC, Canada V1V 1V7
| |
Collapse
|
6
|
Querner C, Reiss P, Sadki S, Zagorska M, Pron A. Size and ligand effects on the electrochemical and spectroelectrochemical responses of CdSe nanocrystals. Phys Chem Chem Phys 2005; 7:3204-9. [PMID: 16240033 DOI: 10.1039/b508268b] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electrochemical properties of CdSe quantum dots with electrochemically inactive surface ligands (TOPO) have been investigated in comparison with the analogous nanocrystals containing electrochemically active oligoaniline ligands. The TOPO-capped nanocrystals have been studied in a wide size range (from 3 to 6.5 nm) with the goal to amplify the influence of the quantum confinement effect on the electrochemical response. The determined HOMO and LUMO levels have been found in good agreement with the ones obtained from photoluminescence studies and those predicted theoretically. Ligand exchange with aniline tetramer significantly influences the voltammetric peaks associated with the HOMO oxidation and the LUMO reduction of the quantum dots, which are shifted to higher and lower potentials, respectively. These shifts are interpreted in terms of the positive ligand charging which precedes the oxidation of the nanocrystals and the insulating nature of the ligand in the case of the nanocrystal reduction. The ligand-nanocrystal interactions have also been studied by UV-Vis-NIR and Raman spectroelectrochemistry in comparison with a specially prepared model compound which, apart from the anchoring function is identical to the grafted oligoaniline ligand. Both spectroelectrochemical techniques clearly indicate the same nature of the oxidation/reduction pathway for both the model compound and the grafted ligand. The influence of the grafting is manifested by a shift in the onset of the ligand oxidation as compared to the case of the "free" model compound. Since both components (ligands and nanocrystals) mutually influence their electrochemical and spectroelectrochemical properties, the newly developed system can be considered as a true molecular hybrid. Such hybrids are of interest because the potential zone of the ligand electroactivity is well separated from that of the nanocrystals and, as a result, the organic part can be electrochemically switched between the semiconducting and the conducting states with no change in the oxidation state of the nanocrystal. The newly developed system offers therefore the possibility of an electrical addressing of individual nanocrystals via the conducting ligands.
Collapse
Affiliation(s)
- Claudia Querner
- DRFMC, UMR 5819 SPrAM (CEA-CNRS-Université J. Fourier Grenoble I), Laboratoire Electronique Moléculaire, Organique et Hybride, CEA Grenoble, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France
| | | | | | | | | |
Collapse
|
10
|
Louarn G, Lapkowski M, Quillard S, Pron A, Buisson JP, Lefrant S. Vibrational Properties of PolyanilineIsotope Effects. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp953387e] [Citation(s) in RCA: 251] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- G. Louarn
- Laboratoire de Physique Cristalline, IMN, Université de Nantes, UMR 110, 2, rue de la Houssinière, 44072 Nantes Cedex 03, France, Department of Chemistry, Silesian Technical University, 44 100 Gliwice, Poland, Department of Textile Engineering and Environmental Sciences, Technical University of Lódz, Bielsko-Biala Campus, 43 300 Bielsko-Biala, Plac Fabryczny 1, Poland, Department of Materials Science and Ceramics, Academy of Mining and Metallurgy, 30 059 Kraków, Mickiewicza 30, Poland, and Department of
| | - M. Lapkowski
- Laboratoire de Physique Cristalline, IMN, Université de Nantes, UMR 110, 2, rue de la Houssinière, 44072 Nantes Cedex 03, France, Department of Chemistry, Silesian Technical University, 44 100 Gliwice, Poland, Department of Textile Engineering and Environmental Sciences, Technical University of Lódz, Bielsko-Biala Campus, 43 300 Bielsko-Biala, Plac Fabryczny 1, Poland, Department of Materials Science and Ceramics, Academy of Mining and Metallurgy, 30 059 Kraków, Mickiewicza 30, Poland, and Department of
| | - S. Quillard
- Laboratoire de Physique Cristalline, IMN, Université de Nantes, UMR 110, 2, rue de la Houssinière, 44072 Nantes Cedex 03, France, Department of Chemistry, Silesian Technical University, 44 100 Gliwice, Poland, Department of Textile Engineering and Environmental Sciences, Technical University of Lódz, Bielsko-Biala Campus, 43 300 Bielsko-Biala, Plac Fabryczny 1, Poland, Department of Materials Science and Ceramics, Academy of Mining and Metallurgy, 30 059 Kraków, Mickiewicza 30, Poland, and Department of
| | - A. Pron
- Laboratoire de Physique Cristalline, IMN, Université de Nantes, UMR 110, 2, rue de la Houssinière, 44072 Nantes Cedex 03, France, Department of Chemistry, Silesian Technical University, 44 100 Gliwice, Poland, Department of Textile Engineering and Environmental Sciences, Technical University of Lódz, Bielsko-Biala Campus, 43 300 Bielsko-Biala, Plac Fabryczny 1, Poland, Department of Materials Science and Ceramics, Academy of Mining and Metallurgy, 30 059 Kraków, Mickiewicza 30, Poland, and Department of
| | - J. P. Buisson
- Laboratoire de Physique Cristalline, IMN, Université de Nantes, UMR 110, 2, rue de la Houssinière, 44072 Nantes Cedex 03, France, Department of Chemistry, Silesian Technical University, 44 100 Gliwice, Poland, Department of Textile Engineering and Environmental Sciences, Technical University of Lódz, Bielsko-Biala Campus, 43 300 Bielsko-Biala, Plac Fabryczny 1, Poland, Department of Materials Science and Ceramics, Academy of Mining and Metallurgy, 30 059 Kraków, Mickiewicza 30, Poland, and Department of
| | - S. Lefrant
- Laboratoire de Physique Cristalline, IMN, Université de Nantes, UMR 110, 2, rue de la Houssinière, 44072 Nantes Cedex 03, France, Department of Chemistry, Silesian Technical University, 44 100 Gliwice, Poland, Department of Textile Engineering and Environmental Sciences, Technical University of Lódz, Bielsko-Biala Campus, 43 300 Bielsko-Biala, Plac Fabryczny 1, Poland, Department of Materials Science and Ceramics, Academy of Mining and Metallurgy, 30 059 Kraków, Mickiewicza 30, Poland, and Department of
| |
Collapse
|