Steady organic-inorganic perovskite hybrids with [H₂2-AMP]_3/2Fe(CN)₆, [H₂3-AMP]_3/2Fe(CN)₆ and [H₂4- AMP]_3/2Fe(CN)₆ (AMP = aminomethylpyridine) were formed in the air. Each structure shows an unusual layered organic-inorganic structural type. The hybrids enveloped in paraffin, respectively, to prepare hybrid paste electrode (HPE) (HPE-2 with [H₂2-AMP]_3/2Fe(CN)₆, HPE-3 with [H₂3-AMP]_3/2Fe(CN)₆, HPE-4 with [H₂4-AMP]_3/2Fe(CN)₆). Three hybrids in HPEs showed good electrochemical characteristics. The sequence of redox activity is [H₂4- AMP]_3/2Fe(CN)₆ > [H₂2-AMP]_3/2Fe(CN)₆ > [H₂3-AMP]_3/2Fe(CN)₆ and that of electrocatalytical characteristics is [H₂3- AMP]_3/2Fe(CN)₆ > [H₂2-AMP]_3/2Fe(CN)₆ > [H₂4-AMP]_3/2 Fe(CN)₆. Three hybrids have been employed to investigate the interaction between DNA and three hybrids. The results indicate that between [H₂3-AMP]_3/2Fe(CN)₆ and DNA is useful and [H₂3-AMP]_3/2Fe(CN)₆ can detect the hybridization of DNA. And the interaction between [H₂2-AMP]_3/2Fe(CN)₆ and DNA and between [H₂4-AMP]_3/2Fe(CN)₆ and DNA is slender. Three HPEs display remarkable electrochemical sensitivity and stability. The variation coefficients (RSD) of repeatedly successive and interval assays are less than 2.5%. The chemical and physical stability of three hybrids is satisfactory.

Date Published: 24 August 2009
PDF: 10 pages
Proc. SPIE 7381, International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, 73810N (24 August 2009);

Published in SPIE Proceedings Vol. 7381:
International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors
Xu-yuan Chen; Yue-lin Wang; Zhi-ping Zhou; Qing-kang Wang, Editor(s)