Evolution of chlorophyll/polyaniline nanorod network with enhanced electro-optic property

We report the evolution of large area network of polyaniline nanorods through the self-aggregated chlorophyll a by selecting suitable monomeric ratio. H aggregation within the polymer composite is exhibited by hypsochromic shift in Soret band and anti-Stokes shift in fluorescence spectra. Interaction of porphyrin π with conjugated polymer backbone is supported by infrared spectroscopy. The gradual superiority of electrical property [due to the presence of delocalised π of H aggregated chlorophyll within the system] and enhanced optical properties with increasing chlorophyll a reinforcement reflect the potential advantages for excitation energy transfer and electron transport through the incorporation of chlorophyll molecular stacking.

► Nano rod network can be formed guided by chlorophylla 1D aggregate.
► The regularly stacked porphyrins make the composite more ordered.
► Delocalized π of aggregated chlorophyll increases the conductivity up to 8 scm–1.
► The Pl emission of composites at 670 nm increases with chlorophyll concentration.
► The emission can be tuned by varying the concentration of composite counterpart.