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Issue 23, 2018
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Self-agglomerated crystalline needles harnessing ESIPT and AIEE features for the ‘turn-on’ fluorescence detection of Al3+ ions

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Abstract

We report the synthesis of probe 2 for the fluorescence “turn-on” detection of Al3+ ions in CH3OH. Probe 2 has been designed via utilizing the aggregation-induced emission properties of the tetraphenylethylene unit, with further enhancement from Schiff base units for the ESIPT phenomenon. Probe 2 exhibits emission at 548 nm (λex = 360 nm), with a large Stokes shift of 188 nm, indicating the ESIPT phenomenon. Probe 2 also exhibits emission enhancement via increasing the H2O ratio up to 70–90% H2O/THF (v/v) and altering the spherical morphology to needle shapes. Probe 2 has been found to be highly selective and sensitive towards Al3+ ions over other metal ions in pure CH3OH using absorption and emission spectroscopy. FESEM analysis revealed that the size of probe 2 increases upon the addition of Al3+ ions. Thus, the fluorescence “turn-on” behaviour of probe 2·Al3+ is due to metal-induced aggregation.

Graphical abstract: Self-agglomerated crystalline needles harnessing ESIPT and AIEE features for the ‘turn-on’ fluorescence detection of Al3+ ions

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Publication details

The article was received on 18 Jul 2018, accepted on 09 Oct 2018 and first published on 12 Oct 2018


Article type: Paper
DOI: 10.1039/C8NJ03577F
Citation: New J. Chem., 2018,42, 18550-18558
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    Self-agglomerated crystalline needles harnessing ESIPT and AIEE features for the ‘turn-on’ fluorescence detection of Al3+ ions

    P. Puri, G. Kumar, K. Paul and V. Luxami, New J. Chem., 2018, 42, 18550
    DOI: 10.1039/C8NJ03577F

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