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Spectroscopic Characterizations Of Nonamphiphilic 2,5-Bis (5-Tert-Butyl-Benzoxazolyl)-Thiophene Molecules At The Air–Water Interface And In Langmuir–Blodgett Films

Author

Listed:
  • S. BISWAS

    (Department of Physics, Tripura University, Suryamaninagar, 799130 Tripura, India)

  • SYED ARSHAD HUSSAIN

    (Department of Physics, Tripura University, Suryamaninagar, 799130 Tripura, India)

  • D. BHATTACHARJEE

    (Department of Physics, Tripura University, Suryamaninagar, 799130 Tripura, India)

Abstract

This paper reports the π–A isotherm and spectroscopic characterizations of mixed Langmuir and Langmuir–Blodgett films of a nonamphiphilic thiophene derivative, namely, 2,5-Bis (5-tert-butyl-benzoxazolyl)-thiophene (BBOT) molecules, mixed with polymethyl methacrylate (PMMA) and stearic acid (SA). The π–A isotherms and molefraction vs. area per molecule studies indicate some repulsive interaction between sample (BBOT) and matrix (PMMA or SA) molecules. At higher surface pressure in the SA mixed BBOT Langmuir monolayer, a phase transition occurs, which has been revealed by π–A isotherm studies. UV-vis absorption and fluorescence spectroscopic studies confirm this phase transition and closer association of BBOT molecules. Spectroscopic studies of LB films lifted at higher surface pressure clearly confirm the presence of dimmers and higher-order n-meric sites.

Suggested Citation

  • S. Biswas & Syed Arshad Hussain & D. Bhattacharjee, 2008. "Spectroscopic Characterizations Of Nonamphiphilic 2,5-Bis (5-Tert-Butyl-Benzoxazolyl)-Thiophene Molecules At The Air–Water Interface And In Langmuir–Blodgett Films," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 15(06), pages 889-896.
    • Handle: RePEc:wsi:srlxxx:v:15:y:2008:i:06:n:s0218625x08012086
    DOI: 10.1142/S0218625X08012086
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