摘要
Electrochrometic measurements were carried on the Z-type Langmuir-Blodgett films oftwo liquid crystalline polymers: mono-{6-[4-(phenylazo) naphthyloxy] hexyl} (1a) andmono-{6-[4-(anthraquinone-1-azo) naphthyloxy] hexyl} (2a) ester of polymaleic acid. Itwas found that for both polymers, poling fields parallel and antiparalle1 to dipole momentsof the polymer side chains induce red and blue shift in absorption bands, respectively. Forpolymer la blue shift is accompanied by absorbance increase, while red shift by absorbancedecrease;but for polymer 2a only decrease in absorbance is observed. A simple model wasproposed to analyze the results.
Electrochrometic measurements were carried on the Z-type Langmuir-Blodgett films of two liquid crystalline polymers: mono-{6-[4-(phenylazo) naphthyloxy] hexyl} (1a) and mono-{6-[4-(anthraquinone-1-azo) naphthyloxy] hexyl} (2a) ester of polymaleic acid. It was found that for both polymers, poling fields parallel and antiparallel to dipole moments of the polymer side chains induce red and blue shift in absorption bands, respectively. For polymer 1a blue shift is accompanied by absorbance increase, while red shift by absorbance decrease;but for polymer 2a only decrease in absorbance is observed. A simple model was proposed to analyze the results.
