Co-assemblies of polydiacetylenes and metal ions for solvent sensing

Abstract

We demonstrate an easy and low-cost approach for the colorimetric differentiation of organic solvents using co-assemblies of polydiacetylenes (PDAs) and metal ions. The co-assemblies were prepared by the self-assembly of amphiphilic 10,12-tricosa diynoic acid with different metal ions (Zn, Cu, Ni, Ca) and subsequent photopolymerization. Different metal ions underwent different interactions with the carboxyl groups on the side chains of poly(10,12-tricosa diynoic acid), which influenced the stimuli-responsiveness of the PDA/metal ion co-assemblies. As a result, the PDA/metal ion co-assemblies with different metal ions showed different solvatochromism. Based on this property, the co-assemblies were used as sensors to differentiate organic solvents.

Chiroptical Transitions of Enantiomeric Ligand‐Activated Nickel Oxides

“…Further theoretical simulations of the binding modes and coordination sites of chiral hybrids materials and related species unveiling the very possible origins of their chiroptical activities. With these know‐how, as‐prepared NPs is subsequently applied as chirality inducer for enantioselective photopolymerizations of poly(10,12‐tricosa diynoic acid) (PTDA), [ 19 ] in which the chirality of PTDA film is induced and finely modulated via chiral ligand‐NiO hybrids. These findings could not only broaden the scope of chiral TMOs synthesis and underlying chirogenesis with respect to ligand effects, but also extend the connection between benchtop wet chemical and 2D programmable photopatterning through chirality‐based nanotechnologies.…”

Characterizing and Tuning the Properties of Polydiacetylene Films for Sensing Applications

“…The absence of ν(CO) at 1693 cm −1 indicates a strong interaction between the film and the Zn cations. 22,42 Figure 9 shows the effect of increasing Zn concentration on the PDA film morphology. At low concentrations (10 μM, Figure 9a), the film behavior was indistinguishable from that of pure water as observed by fluorescent microscopy and UV−vis and fluorescence spectroscopies.…”

“…between the two cation−film complexes was attributed to differences in the coordination geometry. 22,42 Ni-and Fe-Modified Films. Ni-and Fe-modified PDA films exhibited novel behavior.…”

“…Fourier transform infrared spectroscopy (FTIR) was used to investigate the behavior of both pure water and metal-ion-modified PDA films. The IR spectra of the PDA films and vesicles have been previously investigated by Huang et al, Ohe et al, and Wu et al ,, Fatty acid DA films exhibit several general features, regardless of headgroup coordination, corresponding to stretching and scissoring of the methyl and methylene groups: ν s (CH 2 ) at 2849 cm –1 , ν a (CH 2 ) at 2922 cm –1 , ν a (CH 3 ) at 2955 cm –1 , and δ­(CH 2 ) at 1465 cm –1 (see full spectra in Supplemental Figures S22 and S23). Hydrogen-bonded carboxylates exhibit a strong band, ν­(CO), at 1694 cm –1 .…”

“…Coordination type between the carboxylic headgroup and the metal ions can be determined by examining the separation, Δ, between the symmetric and the antisymmetric vibrations of the carboxylate, Δ = ν a (COO) – ν s (COO). Δ has been empirically generalized to correspond to the following interactions: ionic (164 cm –1 ), − bridging bidentate (140–170 cm –1 ), , chelating bidentate (40–110 cm –1 ), monodentate (130–160 cm –1 ). ,− A broad peak between 3200 and 3600 is often assigned as ν­(OH). This can assist in discriminating between bridging bidentate and hydrogen-bonded monodentate.…”