Abstract
Steady-state and time-resolved luminescence experiments were employed to study the electrostatic interaction of cationic photosensitizers and negatively charged colloidal semiconductor particles. Electrostatic adsorption of efficient photosensitizers on semiconductor surfaces is known to quench the photosensitizers' luminescence. By monitoring the quenching, either directly or competitively, thermodynamic constants for binding of both luminescent and non-luminescent ruthenium and osmium complexes to negatively charged SnO2 particle have been determined. The function of atomic cations, such as Li+, Na+ and K+, in controlling the binding of cationic dyes to colloidal SnO2 has also been studied via competitive luminescence. From the study, semiconductor surface binding constants for these species have also been determined.
| Original language | English |
|---|---|
| Pages (from-to) | 251-256 |
| Number of pages | 6 |
| Journal | Journal of Photochemistry and Photobiology A: Chemistry |
| Volume | 143 |
| Issue number | 2-3 |
| Publication status | Published - Oct 10 2001 |
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Keywords
- Binding constant
- Electrostatic binding
- Semiconductor surface
ASJC Scopus subject areas
- Bioengineering
- Physical and Theoretical Chemistry
Cite this
Luminescence-based assessment of thermodynamic constants for electrostatic binding of non-luminescent dyes and atomic ions to colloidal semiconductor surfaces. / Dang, Xiaojun; Hupp, Joseph T.
In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 143, No. 2-3, 10.10.2001, p. 251-256.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Luminescence-based assessment of thermodynamic constants for electrostatic binding of non-luminescent dyes and atomic ions to colloidal semiconductor surfaces
AU - Dang, Xiaojun
AU - Hupp, Joseph T
PY - 2001/10/10
Y1 - 2001/10/10
N2 - Steady-state and time-resolved luminescence experiments were employed to study the electrostatic interaction of cationic photosensitizers and negatively charged colloidal semiconductor particles. Electrostatic adsorption of efficient photosensitizers on semiconductor surfaces is known to quench the photosensitizers' luminescence. By monitoring the quenching, either directly or competitively, thermodynamic constants for binding of both luminescent and non-luminescent ruthenium and osmium complexes to negatively charged SnO2 particle have been determined. The function of atomic cations, such as Li+, Na+ and K+, in controlling the binding of cationic dyes to colloidal SnO2 has also been studied via competitive luminescence. From the study, semiconductor surface binding constants for these species have also been determined.
AB - Steady-state and time-resolved luminescence experiments were employed to study the electrostatic interaction of cationic photosensitizers and negatively charged colloidal semiconductor particles. Electrostatic adsorption of efficient photosensitizers on semiconductor surfaces is known to quench the photosensitizers' luminescence. By monitoring the quenching, either directly or competitively, thermodynamic constants for binding of both luminescent and non-luminescent ruthenium and osmium complexes to negatively charged SnO2 particle have been determined. The function of atomic cations, such as Li+, Na+ and K+, in controlling the binding of cationic dyes to colloidal SnO2 has also been studied via competitive luminescence. From the study, semiconductor surface binding constants for these species have also been determined.
KW - Binding constant
KW - Electrostatic binding
KW - Semiconductor surface
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UR - http://www.scopus.com/inward/citedby.url?scp=0042379708&partnerID=8YFLogxK
M3 - Article
VL - 143
SP - 251
EP - 256
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
SN - 1010-6030
IS - 2-3
ER -