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A Λ-shaped cyanostilbene derivative: multi-stimuli responsive fluorescence sensors, rewritable information storage and colour converter for w-LED

Abstract

A new Λ-shaped α-cyanostilbene derivative (TSA) containing active amino-group with fluorescence emission both in solution and solid state was designed, synthesized and characterized. Its colour and fluorescence emission can be switched by external stimuli including acid/base, trinitrophenol (PA) and grinding. The 1H NMR spectra analysis of TSA before and after adding trifluoroacetic acid (TFA), subsequently adding excess triethylamine (TEA) suggested that the transformation of protonation/deprotonation between TSA and TSA-H+ was responsible for acidichromism. Powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) were used to be characterized and it was verified that the metastable state of the ground compounds and crystalline-amorphous states transformation between the original and ground states could reasonably account for the mechanochromic (MFC) luminescent properties. The results revealed that TSA can be used as fluorescence sensors for acid/base and picric acid (PA), and as rewritable information storage material. Moreover, it can also be applied in white light-emitting diode (w-LED) based on its desirable fluorescence emission in solid state.

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Publication details

The article was received on 17 Jun 2018, accepted on 30 Jul 2018 and first published on 03 Aug 2018


Article type: Paper
DOI: 10.1039/C8TC02973C
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    A Λ-shaped cyanostilbene derivative: multi-stimuli responsive fluorescence sensors, rewritable information storage and colour converter for w-LED

    W. Fang, Z. Wang, P. Pei, R. Liu, Y. Zhang, L. Kong and J. Yang, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC02973C

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