Fig. 5From: Preparation and characterization of novel double-decker rare-earth phthalocyanines substituted with 5-bromo-2-thienyl groupsUV–vis spectra of 4 in toluene at 20 mg l−1 upon addition of acetic acid (AcOH). 1: without AcOH; 2: addition of 5 μl AcOH, reaction time 5 min; 3: as 2, but after 30 min; 4: as 3, but addition of 10 μl triethylamine (Et3N); 5: control—addition of 10 μl Et3N to 1 Back to article page