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Updated: Aug 20, 2026

Raman and IR Spectroelectrochemical Methods as Tools to Analyze Conjugated Organic Compounds
Published on: October 12, 2018
Synthesis, electrochemistry, absorption and electro-polymerization of aniline-ethynyl metalloporphyrins
Ching-Yao Lin1, Yu-Chun Hung, Chih-Ming Liu
1Department of Applied Chemistry, National Chi Nan University, 302 University Road, Puli, Nantou Hsien, 545, Taiwan. cyl@ncnu.edu.tw
Abstract:
Free-base, nickel(II), zinc(II) and iron(III) mono(4-aniline-ethynyl)biphenylporphines (AEBPPs) were synthesized and their electro-polymerization reactions were studied. Electrochemical and UV-Visible experiments showed that AEBPPs were electro-polymerized onto Pt and indium tin oxide (ITO) surfaces without significantly changing their redox and spectral properties. This suggests that the pi-conjugations of these porphyrins were not greatly affected upon electro-polymerization. SEM images indicated the formation of porphyrin films on the electrode surfaces, while EDS spectra of the metallo-AEBPP films confirmed deposits of the corresponding metals. Upon closer inspection, the AFM images revealed nano-scale fine structure of these porphyrin films. Both SEM and AFM images of the porphyrin films showed similar trends of porphyrin accumulation.
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