Gravimetric monitoring of adsorption behavior of tetrakis(methylpyrdiniumyl)porphyrin onto quartz crystal surface using an electrode-separated piezoelectric sensor |
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| Authors: | Dazhong Shen Qingji Xie Qi Kang Yanhui Xue |
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| Institution: | (1) Chemistry College, Shandong University, 250100 Jinan, Peoples Republic of China;(2) Chemistry Department, Hunan Normal University, 410081 Changsha, Peoples Republic of China;(3) Shandong Institute of Mining and Technology, 270019 Taian, Peoples Republic of China |
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| Abstract: | The adsorption behavior of 5,10,15,20-tetrakis (4-N-methylpyridiniumyl)-porphyrin (H2TMPyP) from aqueous solutions onto a quartz crystal interface was investigated in situ using an electrode-separated piezoelectric sensor (ESPS). With H2TMPyP adsorbed onto quartz crystal surface of the ESPS, its oscillating frequency decreases linearly with increasing adsorption amount. The adsorption densities obtained in the ESPS method were greater than those determined in a solution depletion method. The influence of surface roughness of quartz crystal and bulk solution properties on the measurement of adsorption density in the ESPS method was discussed. |
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| Keywords: | porphyrin adsorption quartz piezoelectric sensor |
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