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Issue 29, 2012
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A new hydrogel from an amino acid-based perylene bisimide and its semiconducting, photo-switching behaviour

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Abstract

A new, stable, semiconducting, photo-responsive, amino acid (L-tyrosine) based perylene bisimide derivative (PBI-Y) was found to form pH-sensitive hydrogels. This gelator molecule (PBI-Y) has undergone hydrogelation at 50 mM phosphate buffer at pH 5.00–9.00. Different minimum gelation concentration values (MGC) were recorded in different pHs at the same phosphate buffer strength (50 mM). The hydrogel was also characterized using different techniques, including X-ray diffraction analysis, rheology and FT-IR study. The fluorescence and cyclic voltammetric responses of the PBI-Y hydrogelator can be tuned by changing the pH. The PBI-Y hydrogelator has shown self-assembled nanofibrillar network structures, as it has been evident from the field emission scanning electron microscopic (FE-SEM), as well as transmission electron microscopic analyses (TEM). This PBI-Y hydrogel has also shown interesting semiconducting behaviour. This PBI-Y hydrogelator-based photoconductor was found to exhibit excellent photo-switching behaviour with a high photo-response value. This holds a future promise for the creation of PBI-conjugated functional soft-materials-based photodetectors and photovoltaics.

Graphical abstract: A new hydrogel from an amino acid-based perylene bisimide and its semiconducting, photo-switching behaviour

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Publication details

The article was received on 29 Jun 2012, accepted on 16 Sep 2012 and first published on 09 Oct 2012


Article type: Paper
DOI: 10.1039/C2RA21319B
Citation: RSC Adv., 2012,2, 11053-11060
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    A new hydrogel from an amino acid-based perylene bisimide and its semiconducting, photo-switching behaviour

    S. Roy, D. Kumar Maiti, S. Panigrahi, D. Basak and A. Banerjee, RSC Adv., 2012, 2, 11053
    DOI: 10.1039/C2RA21319B

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