Manipulation of multiple-responsive fluorescent supramolecular materials based on the inclusion complexation of cyclodextrins with Tyloxapol

摘要: A fluorescent supramolecular hydrogel was prepared by α-cyclodextrin (α-CD) and Tyloxapol, which can be considered as an oligomer of the nonionic surfactant polyoxyethylene tert-octylphenyl ether (Triton X-100, TX-100) with a polymerization degree below 7. For comparison, both Tyloxapol TX-100 were selected to form hydrogels α-CD get more information about interaction between different types surfactants cyclodextrin. These have been thoroughly characterized using various techniques including phase behavior observation, transmission electron microscopy (TEM), field emission scanning (FE-SEM), fluorescence spectra, observations, Fourier transform infrared (FT-IR) spectroscopy, 1H NMR, 2D 1H-1H ROESY small-angle X-ray scattering (SAXS), diffraction (XRD) rheological measurements. The α-CD/Tyloxapol are responsive external stimuli temperature, pH guest molecules, present gelation-induced quenching properties. reason for this phenomenon may that molecules come into cavity inclusion complexes. Due high density narrow α-CD, it induces shift on benzene ring weaken π–π lead quenching. Moreover, formed is highly formaldehyde (HCHO). addition small amount HCHO induce gel-to-sol transition. Interestingly, once gel transforms solution, becomes fluorescent. This makes promising candidate detection removal in home furnishings reduce indoor environmental pollutants.