GRAVIMETRIC MONITORING OF ADSORPTION BEHAVIOR OF TETRAKIS(METHYLPYRIDINIUMYL)PORPHYRIN ONTO QUARTZ-CRYSTAL SURFACE USING AN ELECTRODE-SEPARATED PIEZOELECTRIC SENSOR

Authors
SHEN DZ XIE QJ KANG Q XUE YH
Citation
Dz. Shen et al., GRAVIMETRIC MONITORING OF ADSORPTION BEHAVIOR OF TETRAKIS(METHYLPYRIDINIUMYL)PORPHYRIN ONTO QUARTZ-CRYSTAL SURFACE USING AN ELECTRODE-SEPARATED PIEZOELECTRIC SENSOR, Mikrochimica acta, 128(3-4), 1998, pp. 229-233
Citations number
11
Categorie Soggetti
Chemistry Analytical
Journal title
Mikrochimica acta → ACNP
ISSN journal
00263672
Volume
128
Issue
3-4
Year of publication
1998
Pages
229 - 233
Database
ISI
SICI code
0026-3672(1998)128:3-4<229:GMOABO>2.0.ZU;2-F
Abstract
The adsorption behavior of 0,15,20-tetrakis(4-N-methylpyridiniumyl)-po rphyrin (H2TMPyP) from aqueous solutions onto a quartz crystal interfa ce was investigated in situ using an electrode-separated piezoelectric sensor (ESPS). With H2TMPyP adsorbed onto quartz crystal surface of t he ESPS, its oscillating frequency decreases linearly with increasing adsorption amount. The adsorption densities obtained in the ESPS metho d were greater than those determined in a solution depletion method. T he influence of surface roughness of quartz crystal and bulk solution properties on the measurement of adsorption density in the ESPS method was discussed.