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. 2022 May 15;27(10):3162. doi: 10.3390/molecules27103162

Figure 3.

Figure 3

(a) The UV-vis absorption spectra and (b) fluorescence spectra of p(P[5](OTf)2-co-9,10-dea) CP in THF with increasing concentration (slit widths: ex. 5 nm, em. 3 nm; 25 °C). (c) Fluorescence decay profile and (d) quantum yield of p(P[5](OTf)2-co-9.10-dea) (solvent: THF, λex = 480 nm; [pillar[5]arene unit] = 10–5 M, 25 °C). (e) Characterization of the host–guest interactions between pillar[5]arenes and adiponitrile guests by NMR spectroscopy. 1H NMR spectra (400 MHz, CDCl3, 298 K) of (i) DMP[5]A (5 × 10−3 M), (ii) the equimolar mixture of DMP[5]A (5 × 10−3 M) and adiponitrile (5 × 10−3 M), (iii) adiponitrile (5 × 10−3 M). (f) Fluorescent emission spectra of p(P[5](OTf)2-co-9.10-dea) in THF with different ratio of adiponitrile (λex = 480 nm; λem = 552 nm; slit widths: ex. 5 nm, em. 3 nm; 25 °C).