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Issue 20, 2012
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Photo-induced charge-transfer complex formation and organogelation by a tripeptide

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Abstract

A terminally protected tripeptide Boc–Phe–Phe–Tyr–OMe 1 and picric acid form a photo induced charge-transfer complex and organogels. The interactions between stacked aromatic units play a key role in the assembly process. UV light (366 nm) has been used as a source of energy to cleave and homogenize π-stacking in the supramolecular arrangement of peptide 1 and picric acid. CD, FT-IR, NMR and powder X-ray diffraction studies exhibit distinct structural changes before and after light irradiation. Field emission scanning electron microscopy of the xerogels reveal a morphological change caused by photo induced charge-transfer complex formation. The fluorescence spectroscopy as well as confocal microscopy studies show that these charge-transfer complexes have a significant red emission at 672 nm.

Graphical abstract: Photo-induced charge-transfer complex formation and organogelation by a tripeptide

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Publication details

The article was received on 10 Jan 2012, accepted on 20 Mar 2012 and first published on 13 Apr 2012


Article type: Paper
DOI: 10.1039/C2SM25062D
Citation: Soft Matter, 2012,8, 5621-5628
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    Photo-induced charge-transfer complex formation and organogelation by a tripeptide

    P. Jana, S. Maity, S. K. Maity, P. K. Ghorai and D. Haldar, Soft Matter, 2012, 8, 5621
    DOI: 10.1039/C2SM25062D

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