Gelification Effects on the Structure and Birefringence of Charge Transfer Complex Terthiophene Bisililated – TCNQ Hybrid Materials

Abstract:

Charge transfer complexes (CTC) can be readily introduced into materials by cohydrolysis-copolymerisation of bis-silylated ter-thiophenes as precursors with TMOS and TEOS in the presence of TCNQ. CTC formation is shown in the visible spectrum of the xerogel by the band at 850 nm characteristic of the TCNQ·- radical anion. Vibrational spectra have shown that strong vibration of C≡N bond at 2184, 2120 and 1595 cm-1 as peaks characteristics of CTC. The CTC bands are weak and the complex is easily destroyed by washing with acetone, which removes the TCNQ. The gelification effect of the charge transfer complexes on the hybrid materials of 2,5’’- bis(trime thoxysilyl)terthiophene/TCNQ/ TMOS showed that the peak with distance of more than 11.68 Å, formed by precursors and matrices, as a lamellar structure. The birefringence of xerogel BTS3T in presence of alkoxysilane showed that the value is near the detection limit of 0.1 – 0.4 x 10-3, which is weaker than BTS3T / THF with the birefringence value of 4.5 x 10-3.

• Periodical: Materials Science Forum (Volume 517)
• Pages: 257-261
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.517.257
• Online since: June 2006
• Authors: N. Kancono, H.B. Senin
• Keywords: Birefringence, Charge Transfer Complex CTC, Lamellar Structure, Terthiophene

References

[1] Corriu, R. J. P.; Young, J. C. Chapter 20 in the Chemistry of Organic Silicon Compounds; Wiley, New York, (1989).

[2] Hench, L. L.; West, J. K. Chem. Rev. 1990, 90, pp.33-72.

[3] Corriu, R. J. P.; Moreau, J. E.; Thepot, P.; Wong Chi Man, M., Chem. Mater 1992, 4, p.1217.

[4] Corriu, R. J. P.; Moreau, J. E.; Thepot, P.; Wong Chi Man, M., Chem. Mater 1994, 6, p.640.

[5] Kancono; Douglas, W. E.; Corriu, R. J. P., Effet de la Formation des Complexes de Transfert de Charge sur la Structure d'Hybrides Inorga-nique -Organique Prepares à partir de Bis(trimethoxysilan)terthiophene et Tetracyanoquiodimethane, In Proceeding 10ème SFC-Journee Grand Sud-Ouest; Ed. Universite Paul Sabatier: Toulouse, 2000, pp.83-84.

[6] Kancono; Douglas, W.E.; Corriu, R. J. P., Effect of TCNQ Charge Transfer Complexes Formation on Structure of Organic-Inorganic Hybrids Prepared from 2, 5'bis(trimethoxysilyl)oligothiophene, In Proceeding Second International Inorganic Materials; Ed.: Elsevier, University of California, Santa Barbara, 2000, pp (P131-132).

[7] Perrine, D. M.; Bush, D. M.; Kornak, E. P.; Zhang, M.; Cho, Y. H.; Kagan, J., Journal Org. Chem. 1991, 56, p.5095.

[8] Kancono; Douglas, W. E.; Corriu, R. J. P., Preparation and Studies of Charge-Transfer Complex of Xerogel Organic-Inorganic Hybrids of Terthiophene with Present of TCNQ., In Proceeding 5th ISSM; Ed.; ISTECS- EUROPE & PPI Prancis: Paris, 2000, pp.260-263.