Grant: Research Tools and Instruments - Category 1 (<$150,000)
Université de Sherbrooke
$127,125.00
Remplacement d'un phosphorimètre/ Replacement of a phophorimeter
EF 2011-12
Résumé
This request is for the replacement of a phosphorimeter. This instrument consists of a pulsed source of light, an excitation monochromator, a sample chamber, an emission monochromator, and a detector. Upon light excitation, the sample absorbs this light at a given wavelength and may re-emit light as a processus of relaxation. One type of emitted light is called phosphorescence; the other one is called fluorescence. Therefore one can used this phenomenon to monitor the behaviour of the molecule or the material upon light excitation. The crucial part of this instrument is the pulsed source, typically starting at 1 microsecond. One can then monitor the intensity of the emitted phosphorescence vs time and extract its the lifetime. One can also record the (phosphorescence) spectra at delay time greater than one microsecond and monitor the evolution of the spectra with time hence allowing to see whether more than one species is involved in the relaxation process. The goal of the research is to design new polymers for photocell applications and new photo-catalysts for hydrogen evolution. In photocell design, molecules and polymers are synthesized and analyzed for their emission properties, including both fluorescence and phosphorescence. The efficiency of the photocells will depend on the speed at which the light energy is aborbed and distributed in the material and at which the electron transfer, inducing an electric current, is done. On the photoinduced hydrogene evolution side, the efficiency will depend on the same parameters within the photocatalysts. The latters are made of platinum complexes which is well known of hydrogen evolution. With heavy metals, materials are prone to exhibit phosphorescence. In order to measure the rates of excitation energy migration and electron transfer in a material of a compounds, the monitoring of the phosphorescence (and fluorescence) properties (intensity and spectra) is necessary. This instrument is dedicated to phosphorescence.
Programme
Research Tools and Instruments - Category 1 (<$150,000)
Bénéficiaire
Emplacement
Quebec, Canada
Type de bénéficiaire
Academia
Type
Grant
Source
NSERC's Awards Data
Tel que publié
Application id
421949-2012
Name nom
Harvey, Pierre
Department département
Chimie
Organization id
68
Institution établissement
Université de Sherbrooke
Province en
Québec
Province fr
Québec
Country en
CANADA
Country fr
CANADA
Fiscal year exercice financier
2011
Competition year année de concours
2012
Award amount
127125
Program id
EQPEQ
Program nane en
Research Tools and Instruments - Category 1 (<$150,000)
Program name fr
Outils et instruments de recherche - catégorie 1 (<150 000$)
Group en
Discovery grants programs
Group fr
Programmes de subventions à la découverte
Committee code
1504
Committee name en
Chemistry
Committee name fr
Chimie
Area of application code
400
Area of application group en
Environment
Area of application group fr
Environnement
Area of application en
Environment
Area of application fr
Environnement
Research subject code
3605
Research subject group en
Inorganic chemistry
Research subject group fr
Chimie inorganique
Research subject en
Inorganic photochemistry
Research subject fr
Photochimie inorganique
Partie
1
Nb partie
1
Application title
Remplacement d'un phosphorimètre/ Replacement of a phophorimeter
Keyword
NSERC
Application summary
This request is for the replacement of a phosphorimeter. This instrument consists of a pulsed source of light, an excitation monochromator, a sample chamber, an emission monochromator, and a detector. Upon light excitation, the sample absorbs this light at a given wavelength and may re-emit light as a processus of relaxation. One type of emitted light is called phosphorescence; the other one is called fluorescence. Therefore one can used this phenomenon to monitor the behaviour of the molecule or the material upon light excitation. The crucial part of this instrument is the pulsed source, typically starting at 1 microsecond. One can then monitor the intensity of the emitted phosphorescence vs time and extract its the lifetime. One can also record the (phosphorescence) spectra at delay time greater than one microsecond and monitor the evolution of the spectra with time hence allowing to see whether more than one species is involved in the relaxation process. The goal of the research is to design new polymers for photocell applications and new photo-catalysts for hydrogen evolution. In photocell design, molecules and polymers are synthesized and analyzed for their emission properties, including both fluorescence and phosphorescence. The efficiency of the photocells will depend on the speed at which the light energy is aborbed and distributed in the material and at which the electron transfer, inducing an electric current, is done. On the photoinduced hydrogene evolution side, the efficiency will depend on the same parameters within the photocatalysts. The latters are made of platinum complexes which is well known of hydrogen evolution. With heavy metals, materials are prone to exhibit phosphorescence. In order to measure the rates of excitation energy migration and electron transfer in a material of a compounds, the monitoring of the phosphorescence (and fluorescence) properties (intensity and spectra) is necessary. This instrument is dedicated to phosphorescence.
