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Water-soluble luminescent hybrid aminoclay grafted with lanthanide complexes synthesized by a Michael-like addition reaction and its gas sensing application in PVP nanofiber

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Abstract

Aminoclay was used as a scaffold for lanthanide complexes and dye molecules for light harvesting applications. However, these syntheses are mainly based on a non-covalent electrostatic attraction between aminoclay and guest molecules. Herein, we develop a strategy to synthesize luminescent aminoclay by a Michael-like addition reaction between an amino-group of aminoclay and a Michael acceptor group. UV absorbance, photoluminescence, and phosphorescence spectra studies confirmed that luminescent lanthanide complexes were covalently grafted onto the amionclay. We found that the hybrid aminoclays (AC-Ln(DPA)n) exhibit favorable luminescent properties coupled with good water-solubility. Furthermore, the luminescent aminoclay can be incorporated into water-soluble polyvinylpyrrolidone (PVP) to obtain a highly luminescent, physically crosslinked nanofiber by electrospinning technology. Interestingly, an exposure of the nanofiber to HCl vapors can cause a significant quenching of Eu3+ luminescence, while a remarkable luminescence enhancement occurred upon exposure of the acid-treated nanofiber to Et3N vapors. Further studies indicated that this reversible luminescence change is due to the dissociation and recovery of Eu3+ complexes by HCl and Et3N vapors. The results present a promising gas sensing application based on developed hybrid luminescent materials.

Graphical abstract: Water-soluble luminescent hybrid aminoclay grafted with lanthanide complexes synthesized by a Michael-like addition reaction and its gas sensing application in PVP nanofiber

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Publication details

The article was received on 10 Feb 2017, accepted on 12 Apr 2017 and first published on 13 Apr 2017


Article type: Paper
DOI: 10.1039/C7TC00640C
Citation: J. Mater. Chem. C, 2017, Advance Article
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    Water-soluble luminescent hybrid aminoclay grafted with lanthanide complexes synthesized by a Michael-like addition reaction and its gas sensing application in PVP nanofiber

    Q. Li, L. Jin, L. Li, W. Ma, Z. Wang and J. Hao, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC00640C

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