Solvent induced ordered-supramolecular assembly of highly branched protoporphyrin IX derivative |
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Authors: | Sidhanath V. Bhosale Santosh V. Nalage Jamie M. Booth Akhil Gupta Suresh K. Bhargava |
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Affiliation: | 1. Polymer and Functional Materials Division , Indian Institute of Chemical Technology , Hyderabad , Andhra Pradesh , 500 607 , India sidhanath2003@yahoo.co.in;3. Polymer and Functional Materials Division , Indian Institute of Chemical Technology , Hyderabad , Andhra Pradesh , 500 607 , India;4. School of Applied Sciences, RMIT University , GPO Box 2476V, Melbourne , VIC , 3001 , Australia;5. Department of Materials Engineering , Monash University , Wellington Road, Clayton , VIC , 3800 , Australia |
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Abstract: | Protoporphyrin IX species bearing highly branched alkyl chains were self-assembled into well-defined nanostructures such as rod-like in CHCl3–cylcohexane (1:9, v/v) and a honeycomb-like morphology in a polar solvent dimethyl sulfoxide (DMSO). The rod-like morphologies observed in the atomic force microscopy (AFM) and transmission electron microscopy (TEM) suggest that the lamellar phase self-organises into multilamellar vesicles. The X-ray diffraction (XRD) results indicate molecular arrangements resulting from longitudinal and transverse stacking of the porphyrin head groups in the lamellar structure. The typical nanostructures were derived from a high level of cooperativity between the porphyrin cores via π–σ interactions and supported by hydrogen bonding and van der Waals interactions. The nanostructures were characterised by means of UV–vis, fluorescence, AFM, TEM and XRD analysis. Our methodology confirms the potential of protoporphyrin IX derivatives in supramolecular chemistry. |
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Keywords: | protoporphyrin IX self-assembly nanorods honeycomb AFM TEM |
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