Multifunctional Dy@PVP and Ho@PVP one-dimensional nanofibers: Electrospinning synthesis, luminescent and magnetic properties

Abstract

In this paper, different concentrations of DyIII complex of {[Dy(2-stp)2(H2O)6].2(4,4 -bipy).5(H2O)}, and HoIII complex of {[Ho(2-stp)2(H2O)6].2(4,4 -bipy).5(H2O)} (2-stp= 2-sulfoterephthalate and 4,4 -bipy=4,4 - bipyridine), were doped into the polymer matrix of Poly(vinylpyrrolidinone) (PVP) using the electrospinning technique, forming a series of orangish-yellow and purish-yellow luminescent nanofibers of Dy@PVP and Ho@PVP. It was observed that DyIII/HoIII ions showed strong characteristic emission in the luminescent spectra of the composite nanofibers. Simultaneously, in comparison with the precursor DyIII/HoIII complex, the Dy@PVP or Ho@PVP nanofibers has a great improvement in the photo and thermal stability.