Abstract
Abstract Monolayers and Langmuir–Blodgett (LB) films of 2,3,6,7,10,11-hexaalkoxytriphenylenes (CnOTP; n denotes the number of carbon atoms per alkyl chain substituent; n = 3—6) and their charge transfer (CT) complexes with 2,4,7-trinitro-9-fluorenone (TNF) were studied. It was found that the surface pressure applicable for the deposition of LB film increases as the length of alkyl chain of the peripheral substituents decreases. Polarized UV-vis and infrared spectra for the LB films of the CT complexes can be explained consistently with the following model of molecular assembly: The long axes of one-dimensionally stacked molecular columns are preferentially oriented along the dipping direction in the LB films. Marked in-plane dichroism was observed for the LB films of the CT complexes while the LB film of CnOTP without TNF showed only a little dichroism.
Published Version
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