Study of Electrochemical and Electrochromic Properties of 9-Methy1-2,3,6,7-tetramethoxyfluorene in Dichloromethane-TFA-TFAn(I)

Duk-Hyun Kim

Journal of Industrial and Engineering Chemistry, Vol.3, No.2, 73-78, June, 1997

Duk-Hyun Kim

Dept. of Industrial Chemistry, Chungnam Sanup Univ., Chungnam 350-800, Korea

Cyclic voltammetric analysis of 9-methyl-2,3,6,7-tetramethoxyfluorene in CH₂Cl₂-TFA-TFAn indicated that this electrochromic material undergoes reversible electron transfers for both charge transfers at all voltage sweep rates. The first oxidation peak at 625 mV is believed to correspond to the formation of the radical cation from the neutral species upon the removal of one-electron and the second oxidation peak at 1107 mV at a scan rate of 200 mv/s to the formation of the dication from the radical cation. The electroactive radical cation has to be regarded as very stable. This model compound may be used as an electrochromic display in the future. The △E-values of the 9-methyl-2,3,6,7-tetramethoxyfluorene have been found to be in a potential range from 472 to 490 mV. The comparison of the redox processes driven by light and by electrolysis indicates similar processes. The color of the solution always turns from pale green to deep blue.

[References]

Chang IF, Gilbert BL, Sun TI, J. Electrochem. Soc., 122, 955 (1975)
Tsai EW, Basak S, Ruiz JR, Reynolds JR, Kajeshwar K, J. Electrochem. Soc., 136, 3683 (1989)
Reichman B, Bard AJ, J. Electrochem. Soc., 126, 2133 (1979)
Peres RCD, Juliano VF, Panero S, Electrochim. Acta, 38, 869 (1992)
De Paoli MA, Peres CD, Scrosati B, Electrochim. Acta, 37, 1173 (1992)
Nilsson A, Palmquist U, Ronlan A, Parker VD, J. Am. Chem. Soc., 97, 3540 (1975)
Aalstad B, Ronlan A, Parker VD, Acta Chem. Scand., B36, 171 (1982)
Parker VD, Acta Chem. Scand., B35, 299 (1981)
Kim DH, Diplomarbeit, Aachen Univ. of Technology, Aachen, Germany (1992)
Kim DH, Ph.D. Dissertation, Aachen Univ. of Technology, Aachen, Germany (1995)
Nicholson RS, Anal. Chem., 37, 1351 (1965)
Nelson RF, Leedy DW, Seo ET, Adams RN, Z. Analyt. Chem., 224, 184 (1967)
Nicholson RS, Shain I, Anal. Chem., 36, 706 (1964)
Schaefer HJ, Kontakte(Darmstadt), 2, 17 (1987)
Hammerich O, Parker VD, Electrochim. Acta, 18, 537 (1973)
Ronlan A, Parker VD, J. Chem. Soc.-Chem. Commun., 33 (1974)
Bechgaard K, Parker VD, J. Am. Chem. Soc., 94, 4749 (1972)

[1] Chang IF, Gilbert BL, Sun TI, J. Electrochem. Soc., 122, 955 (1975)

[2] Tsai EW, Basak S, Ruiz JR, Reynolds JR, Kajeshwar K, J. Electrochem. Soc., 136, 3683 (1989)

[3] Reichman B, Bard AJ, J. Electrochem. Soc., 126, 2133 (1979)

[4] Peres RCD, Juliano VF, Panero S, Electrochim. Acta, 38, 869 (1992)

[5] De Paoli MA, Peres CD, Scrosati B, Electrochim. Acta, 37, 1173 (1992)

[6] Nilsson A, Palmquist U, Ronlan A, Parker VD, J. Am. Chem. Soc., 97, 3540 (1975)

[7] Aalstad B, Ronlan A, Parker VD, Acta Chem. Scand., B36, 171 (1982)

[8] Parker VD, Acta Chem. Scand., B35, 299 (1981)

[9] Kim DH, Diplomarbeit, Aachen Univ. of Technology, Aachen, Germany (1992)

[10] Kim DH, Ph.D. Dissertation, Aachen Univ. of Technology, Aachen, Germany (1995)

[11] Nicholson RS, Anal. Chem., 37, 1351 (1965)

[12] Nelson RF, Leedy DW, Seo ET, Adams RN, Z. Analyt. Chem., 224, 184 (1967)

[13] Nicholson RS, Shain I, Anal. Chem., 36, 706 (1964)

[14] Schaefer HJ, Kontakte(Darmstadt), 2, 17 (1987)

[15] Hammerich O, Parker VD, Electrochim. Acta, 18, 537 (1973)

[16] Ronlan A, Parker VD, J. Chem. Soc.-Chem. Commun., 33 (1974)

[17] Bechgaard K, Parker VD, J. Am. Chem. Soc., 94, 4749 (1972)