Chunfang Zhang

A central boron embedded structure (B-6-PP) yields narrow-band NIR-II emission due to reduced transition dipole moment, non-orthogonal angle to transition dipole, lowest reorganization energy and relatively small Huang–Rhys factor for D ₁ → D ₀ .

An ROS-responsive hydrogel was developed. The hydrogel exerts immunomodulatory effects by scavenging ROS. It regulates PPAR, PI3K-AKT, and JAK-STAT signaling pathways for pro-regeneration. This hydrogel represents an ideal diabetic wound dressing.

Herein, we report the NHC-catalyzed enantioselective [5 + 1] annulation between indole-derived α,β-γ,δ-unsaturated aldehydes and 3-aminomaleimides, providing a variety of enantiomerically enriched indole-based spirocycles in excellent yields.

Two π-extended [6]helicenes 7 and 10a have been successfully synthesized through the modification of their corresponding axially chiral precursors, which were verified by single crystal X-ray diffraction analysis. The (P)- and (M)-enantiomers of compounds 7 and 10a were resolved via chiral high-performance liquid chromatography (HPLC). However, the enantiomers of the axially chiral arenes 2, 3, and 4 could not be resolved by chiral HPLC due to their susceptibility to racemization at room temperature. The as-prepared arenes were characterized using UV-vis absorption and fluorescence spectroscopy, cyclic voltammetry, circular dichroism (CD) spectroscopy, and circularly polarized luminescence (CPL) spectroscopy. The CD and CPL spectra of 7 and 10a exhibit opposite Cotton effect and fluorescence signals, rendering them promising ingredients for CPL emitters.

Low ionic conductivity is a major obstacle for polymer solid-state electrolytes. In response to this issue, a design concept of enhanced regional electric potential difference (EREPD) is proposed to modulate the interaction of nanofillers with other components in the composite polymer solid-state electrolytes (CPSEs). While ensuring the periodic structure of the graphdiyne (GDY) backbone, methoxy-substituted GDY (OGDY) is prepared by an asymmetric substitution strategy, which increases the electric potential differences within each repeating unit of GDY. The staggered distributed electron-rich regions and electron-deficient regions on the two-dimensional plane of OGDY increase the free Li⁺ concentration through Lewis acid–base pair interaction. The adjacent ERRs and EDRs form uniformly distributed EREPDs, creating a continuous potential gradient that synergistically facilitates the efficient migration of Li⁺. Impressively, the OGDY/poly(ethylene oxide) (PEO) exhibits a high ionic conductivity (1.1 × 10^–3 S cm⁻¹) and ion mobility number (0.71). In addition, the accelerated Li⁺ migration promotes the formation of uniform and dense SEI layers and inhibits the growth of lithium dendrites. As a proof of concept, Li||Li symmetric cell and Li||LiFePO₄ full cell and pouch cell assembled with OGDY/PEO exhibit good performance, highlighting the effectiveness of our EREPD design strategy for improving CPSEs performance.

Here, we provide an insight into the molecular structure of products formed in the early stage of ring-opening polymerization (ROP) for phenol–aniline/cyclohexylamine-based mono-benzoxazines. By use of a combination of the experimental data obtained from Fourier transform infrared spectroscopy, nuclear magnetic resonance, and electrospray ionization mass spectrometry with density functional theory calculations, the ROP pathways of the mono-benzoxazines are proposed and validated by experiment. The initial polymerization products of the two mono-benzoxazines consist of a range of fragment species and a series of cyclic and linear oligomers, and these products are formed via zwitterionic intermediates. It could be predicted that polybenzoxazines with higher molecular weight would be generated through electrophilic aromatic substitution of hydrogen on the active benzene rings of the oligomers in the later stage of the ROP.

This study reported a novel and unprecedented photoredox-catalyzed protocol for direct allylic C-H fluorosulfonylation of alkenes with FABI. This mild protocol exhibited excellent compatibility with various functional groups, broad substrate scope, and promising scalability, enabling convenient access to a wide range of allyl sulfonyl fluorides with exceptional regioselectivity. The synthetic robustness of this strategy was further demonstrated by the late-stage functionalization of natural products and their ligation with other drugs via SuFEx chemistry.