Shape-Controlled synthesis of conjugated microporous polymer nanotubes and their implementation in continuous flow polymerization

Structure and Morphology Engineering of Hollow Conjugated Microporous Photocatalysts to Boost Photo-Controlled Polymerization at Near-Infrared Wavelengths

“…The h PorIPN MSs showed two major peaks centered at 0.55 and 0.93 nm, whereas the S- h PorIPN MSs displayed two major peaks centered at 0.61 and 1.08 nm (Figure S4). Powder X-ray diffraction (XRD) measurements revealed the typical amorphous characteristics of h PorIPN and S- h PorIPN MSs, which were consistent with previous reports of amorphous analogues produced by Sonogashira–Hagihara cross-coupling (Figure c). − Additionally, the UV–visible spectrum of S- h PorIPN MSs displayed a red-shift in optical absorption over a broad Q -band range from 650 to 780 nm (Figure d). The authors ascribed the bathochromic shift as the incorporation of electron-withdrawing cyano and sulfonic acid groups to the fully π-conjugated organic frameworks .…”

“…By the procedure given in our previous publication, the SiO 2 @PorIPN core–shell MSs were obtained by changing the IB to 3,6-diiodophthalonitrile (IPN) in the template-assisted synthesis (Scheme ). − The SiO 2 @PorIPN core–shell MSs appeared as solid SiO 2 cores surrounding by uniform and coarse polymeric coronas, as determined by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) (Figure a,d). The average diameter of SiO 2 @PorIPN MSs was measured to be 261.5 ± 10.7 nm (Figure S3a).…”

“…In the solid state 13 C nuclear magnetic resonance (NMR) spectra, the characteristic resonance signals in the region of δ = 110−160 ppm were assigned to the combined aromatic carbons and pyrrolic carbons in the backbone of hPorIPN and S-hPorIPN MSs (Figure 2a). 44,45 The resonance peaks in the range of δ = 76−90 ppm, associated with the alkynyl carbons, disappeared, indicating the addition of halosulfonic acid to the internal alkynes in the S-hPorIPN MSs (Figure 2a). 42 Based on Brunauer−Emmett−Teller (BET) theory, the surface areas were estimated to be 521.7 m 2 •g −1 for the hPorIPN MSs and 321.4 m 2 •g −1 for the S-hPorIPN MSs, which were higher than those of 139.2 m 2 •g −1 for the S-cPorIPN CMPs (Figure 2b).…”

“…As expected, the S- h PorIPN MSs were outperforming both S- h PorIB MSs and S- c PorIPN CMPs in singlet oxygen productivity, whereas the UV–visible absorbance of 9,10-dimethylanthracene at λ max = 379 nm diminished steeply under NIR light irradiation (λ max = 740 nm, 30 mW•cm –2 ) (Figure S10). , …”

“…Enhanced penetration through light-proof materials provided by longer wavelengths affords the generation of polymers with potential biomedical applications. It was claimed that hollow CMPs are potentially advantageous in comparison to bulk CMPs, which allows the photogenerated excitons to instantaneously reach the catalytically active sites to drive redox reactions with CTAs and suppresses electron–hole recombination. ,,, A series of photopolymerizations catalyzed by S- h PorIPN MSs was attempted in a non-degassed system shielded by one (∼0.1 mm) and five (∼0.5 mm) layers of white papers and chicken skin (∼2.0 mm), respectively. Evidently, more penalties to monomer conversion would be incurred when the polymerization proceeded through chicken skin in comparison to white papers under 740 nm NIR light illumination (Figure a).…”