This article is the first report on a phthalonitrile monomer containing vinyls in the main chain.

Cu(I)-catalyzed azide−alkyne click polymerization, developed based on the click reaction, has become a powerful tool for the construction of functional polytriazoles with linear and hyperbranched structures. This method has, however, rarely been used for the preparation of functional hyperbranched conjugated polytriazoles (hb-CPTA). In this paper, soluble ethynyl-capped hb-CPTA with weight-averaged molecular weight of 39 500 was synthesized in high yield (84.4%) by the Cu(I)-catalyzed azide−alkyne click polymerization of tetraphenylethene containing diazide [1,2-bis(4-azidophenyl)-1,2-diphenylethene] and tetrayne [1,1,2,2-tetrakis(4-ethynylphenyl)ethane] in equal concentration. By taking advantage of the ethynyl groups on its periphery, the polymer could be efficiently postfunctionalized by azide−alkyne and thiol−yne click reactions. The polymers are thermally stable and loss 5% of their weights at temperatures higher than 340.0°C. hb-CPTA also possesses high char yield (74.8%) at 800°C. The polymers feature the unique characteristics of aggregation-enhanced emission. Furthermore, the PL intensities of the hb-CPTA and thiol−yne postfunctionalized polytriazoles increase linearly with water fraction in THF/water mixtures. Thanks to their rigid structures, the polymers could be fabricated into unimolecular nanoparticles with sizes of ca. 100 nm. Thus, this paper provides a powerful method to synthesize soluble ethynyl-capped hyperbranched polymers, which could be a useful platform for preparation of versatile functional polymers via postreactions.

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Regioseletive 1,3-dipolar polycycloadditions of 4,4′-isopropylidenediphenyl dipropiolate (1) and tetraphenylethene (TPE)-containing diazides (2) are carried out in polar solvents such as DMF/toluene at a moderate temperature of 100 °C for 6 h, producing poly(aroxycarbonyltriazole)s (PACTs) P3 with high molecular weights (M w up to 23900) and regioregularities (F 1,4 up to ~90%) in high yields (up to ~99%). These metal-free click polymerizations can propagate smoothly in an open atmosphere without protection from oxygen and moisture. The obtained polymers are soluble in common organic solvents and thermally stable at temperatures up to 375 °C. Thanks to their contained TPE moieties, the PACTs show aggregation-induced emission and can serve as fluorescent chemosensors for superamplified detection of explosives.aggregation-induced emission, metal-free click polymerization, propiolate, chemosensor

In this paper, we present a highly efficient, cost-effective, and widely applicable functionalized SiO2/TiO2-polymer based coating to fabricate a translucent, fluorine-free, chemically stable, photocatalytic active, self-healable superhydrophobic coating, which consisted of two mixed functionalized particles (MFP) and polydimethylsiloxane (PDMS) in a proper ratio. Both SiO2 and TiO2 powders were functionalized with PDMS brushes to achieve superhydrophobicity. To maximally optimize its properties, including superhydrophobicity, transparency, and photocatalytic activity, the ratios between MFP with PDMS were carefully studied and optimized. Glass slides coated with this mixed coating (MC) showed translucence with a transparency of 75%. It also presented superior photocatalytic activity and strong UV resistance that could repeatedly degrade organic oil pollutants as many as 50 times, while still maintaining superhydrophobicity even upon exposure to UV light with a high intensity of 80 mW/cm2 for as long as 36 h. When low-surface-tension oils such as dodecane wetted the MC surface, it showed excellent slippery performance and could quickly repel strong acid/alkali/hot water and even very corrosive liquids such as aqua regia. MC achieved extremely stable underoil superhydrophobicity (toward liquids including water, strong acid and base, hot water, etc.) and self-cleaning properties, not only in oils at room temperature but also in a scalded oil environment. Moreover, MC showed self-healable performance after recycled plasma treatment. The stainless steel mesh coated with MC was also used to highly efficiently separate oil–water mixtures. Moreover, harsher liquids including strong acid/alkali solutions/hot water/ice water–oil mixtures could also be successfully separated by the coated mesh. This coating was believed to largely broaden both indoor and outdoor applications for superhydrophobic surfaces.

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