Donor triggered aggregation induced dual emission, mechanochromism and sensing of nitroaromatics in aqueous solution.

Spectrochim Acta A Mol Biomol Spectrosc

Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India. Electronic address:

Published: January 2021

The title paper describes the photophysics of a series of 2-benzylidenemalononitrile (RDC) derivatives, having donor- π - acceptor (D-π-A) architecture in solution, solid state and in hydrosol. Interestingly, it is observed that by tuning the electronic energy levels via changing donor strength, one can play with the emissive properties to the large extent; from non- fluorescent to fluorescent, to aggregation induced dual fluorescence, to aggregation induced enhanced emission (AIEE). The nature of aggregation is studied by Field Emission Scanning Electron Microscope (FESEM). This aggregation induced emission (AIE) in hydrosol is used to develop a thin layer chromatography (TLC) based simple, easy to use technique to identify the trinitrophenol in aqueous solution as well as can distinguish the three positional nitrophenol derivatives.

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http://dx.doi.org/10.1016/j.saa.2020.118930DOI Listing

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