Abstract
Three-dimensionally (3D) ordered assemblies of GO layers functionalized with tetrakis(1-methylpyridinium-4-yl)porphyrin p-toluenesulfonate (Por), N,N′-di(2-(trimethylammonium iodide)ethylene) perylenediimide (PDI), and Zn(II) phthalocyanine tetrasulfonic acid (ZnPc) were obtained in water. Proper molar ratio is essential between the cationic dyes, Por and PDI, acting as the “glue” molecules to combine the GO layers and the anionic ZnPc, acting as dispersant of GO layers to (i) construct the 3D assemblies and (ii) the proportional absorption distribution of dye-functionalized GO assemblies. Resulting 3D structures effectively harvest the light from ultraviolet to near-infrared (NIR) regions. Dye molecules are arranged in mainly lateral order on the GO layers with partial stacking, which allows direct interactions with the π-conjugations of the GO surface in 3D architecture. Ultrafast charge separation upon the photoexcitation of the dyes at various wavelengths in the visible/NIR region was observed in thes...
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