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Novel terpolymers were developed with ester group incorporation (BDT-2EST). DM1 with 5% BDT-2EST possesses suitable crystallinity and miscibility matching with Y6 acceptor to offer an excellent power conversation efficiency up to 17.21%. Moreover, the intertwined random features in DM1 offer robust photovoltaic performances with a broad molecular weight tolerance. [ABSTRACT FROM AUTHOR]

Terpolymerization is a feasible approach to optimize the device performance of organic semiconductors. Yet, since most reported terpolymers utilize a one-pot polymerization method, the regularity of the polymer backbone is severely disrupted, and the sequence structure is roughly unclear. Herein, a novel stepwise-feeding terpolymerization approach is developed to finely adjust the terpolymerization process by utilizing the merits of stereoregular donor–acceptor alternative polymerization as well as irregular random copolymerization. In the novel stepwise-feeding terpolymerization, a pre-polymer of the host polymer D18 was synthesized initially, followed by adding a third unit BDD into the polymer backbone. The obtained H9 terpolymer has a more regular main chain with a more definite sequence distribution than its analogs (H6) prepared by one-pot polymerization. As a result, the stepwise-feeding-based terpolymer H9 offered significantly reduced energy loss in the combination with the Y6 acceptor in blend, yielding a record power conversion efficiency (PCE) of up to 18.50% in the terpolymer-based organic solar cells (OSCs). The results demonstrate that stepwise terpolymerization is an effective approach to developing regular terpolymeric semiconductors for high-performance OSCs. [ABSTRACT FROM AUTHOR]

Aiming to circumvent the pre-defined obstacles in the journey of gene transportation, we attempt to compile a number of functional components into a tandem tri-copolymeric material. Herein, a β-cyclodextrin-functionalized poly(glycerol methacrylate) (PG) segment and a quaternary amine-functionalized poly[(2-acryloyl)-ethyl-(p-boronic acid pinacol ester benzyl)diethylammonium bromide] (BP) segment are attached to complex DNA to formulate a nanoscaled delivery system based on electrostatic interactions. The formulated polyplex is strengthened by a hydrophobic poly[2-(5,5-dimethyl-1,3-dioxan-2-yloxy)ethyl acrylate] (PDM) segment, affording improved complex stability. To retrieve the polyplex from entrapment by acidic and digestive endo/lysosomes, light-stimulated ROS-producing 4,4′-(1,2-diphenylethene-1,2-diyl)bis(1,4-phenylene)diboronic acid (TPE) is installed in the cavities of cyclodextrin. Upon light irradiation, TPE is triggered to produce abundant ROS, not only committing disruption of the endo/lysosome membrane for polyplex escape from the entrapment but also inducing the transformation of the positively charged BP to become negatively charged. This charge conversion behavior, together with the transformation of PDM to be hydrophilic and responsive to an acidic endosome pH gradient (pH 5.0) is envisioned to induce the dissociation of the electrostatically-assembled polyplex, thereby facilitating the release of the DNA payload for the subsequent transcription machinery. This strategically-tailored and easily synthesized tandem tri-copolymer exhibits excellent gene expression activity and provides a facile response to endogenous and exogenous stimuli for active gene expression. [ABSTRACT FROM AUTHOR]

A long lifetime iridium(iii) complex chemosensor 1 for cysteine detection has been synthesized. The luminescence signal of 1 could be recognized in strongly fluorescent media through time-resolved emission spectroscopy (TRES). The detection of cysteine in a living zebrafish was demonstrated. [ABSTRACT FROM AUTHOR]

An efficient catalytic system for the ligand-free Suzuki–Miyaura reaction in water at room temperature is disclosed, promoted by Stilbazo (stilbene-4,4′-bis[(1-azo)-3,4-dihydroxybenzene]-2,2′-disulfonic acid diammonium salt). The desired carbon–carbon bond formation proceeded well under mild conditions with high efficiency and good functional group tolerance. [ABSTRACT FROM AUTHOR]

An efficient catalytic system for the ligand-free Suzuki–Miyaura reaction in water at room temperature is disclosed, promoted by Stilbazo (stilbene-4,4′-bis[(1-azo)-3,4-dihydroxybenzene]-2,2′-disulfonic acid diammonium salt). The desired carbon–carbon bond formation proceeded well under mild conditions with high efficiency and good functional group tolerance. [ABSTRACT FROM AUTHOR]