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Herein, a new organic cationic matrix [N(CH3)4]3MoO3F3 suitable for Mn4+ doping was constructed. Due to the large steric hindrance of N[CH3]4+ (TMA), charge compensation defects can be effectively prevented in the heterovalent Mn4+-doping process, and a high IQE (91.05%) was obtained. Through the cation co-doping strategy, Mg2+/Zn2+/Li+ cations were introduced into the Mo6+ cationic site, which improved the crystallinity of the matrix and reduced energy losses, so as to improve luminescence intensity, QE, thermal stability, water stability and other spectral properties. Meanwhile, [N(CH3)4]2TiF6:Mn4+ phosphors with the same TMA organic cation and equivalent Mn4+ doping were synthesized for comparison, and the effects of the Mg2+ cation co-doping strategy on the spectral properties of phosphors with different matrix types (fluoride/oxyfluoride) and substitution types (equivalent/non-equivalent) were analyzed. These findings provide the basis for the preparation of new luminescent materials. Furthermore, according to the optical properties exhibited by these phosphors, they are packaged into WLED devices with excellent photoelectric properties, which are suitable for indoor lighting and display fields. [ABSTRACT FROM AUTHOR]

An artificial signal transduction model with a supramolecular recognition headgroup, a membrane anchoring group, and a pro-enzyme catalysis endgroup was constructed. The transmembrane translocation of the transducer can be reversibly regulated by competitive host–guest complexations as an input signal to control an enzyme reaction inside the lipid vesicles. [ABSTRACT FROM AUTHOR]

Bacterial infections pose severe threats to global public health security. Developing antibacterial agents with both high efficiency and safety to handle this problem has become a top priority. Here, highly stable and effective polymer nanosheets have been constructed by the covalent co-assembly of a pillar[5]arene derivative and metalloporphyrin for photodynamic antibacterial therapy (PDAT). The monolayer nanosheets are strongly positively charged and thus capable of binding with Staphylococcus aureus (SA) through electrostatic interactions. Additionally, the nanosheets can be activated to generate reactive oxygen species (ROS) under white-light irradiation, and exhibit satisfactory antibacterial performance towards SA. More importantly, cell viability assays demonstrate that the nanosheets show little to no cytotoxicity impact on mammalian cells even when the concentrations are much higher than those employed in the antibacterial studies. The above results suggest that the polymer nanosheets could be an effective antibacterial agent to overcome bacterial infections and hold a broad range of potential applications in real life. [ABSTRACT FROM AUTHOR]

A supramolecular nanocapsule was constructed by the ternary host–guest complexation of azobenzene (Azo) and methylviologen (MV) to cucurbit[8]uril (CB[8]) and the subsequent self-assembly. The supramolecular nanocapsule with both glutathione peroxidase (GPx) and superoxide dismutase (SOD) activities can mimic the intracellular enzymatic reactive oxygen species (ROS) defense system. [ABSTRACT FROM AUTHOR]

Herein, we demonstrate a supramolecular nanochannel formed by intermolecular π stacking of pyridine–pyridazine helical oligomers, wherein alkali ions could be easily recognized and transported. Importantly, this nanochannel also revealed reversible collection and triggered-release behaviors via modulating the folded and unfolded states of helical pyridine–pyridazine oligomers. [ABSTRACT FROM AUTHOR]

Self-constructing giant fused vesicles based on hydrazone-pillar[5]arene (HP5) were formed catalytically in weak acid via the formation of dynamic covalent bonds in water. The HP5 vesicles mimicked the process of biomembrane fusion and acted as biocatalysis microreactors induced by fusion. [ABSTRACT FROM AUTHOR]

A rapid and effective enzymatic strategy for the fabrication of a supramolecular polymer is presented for the first time, in which a bifunctional ternary host–guest supramonomer is first prepared followed by subsequent enzymatic coupling of supramonomers. [ABSTRACT FROM AUTHOR]

A pH-responsive artificial selenoenzyme was constructed by reversible binding between organoselenium compound 1 and CB[6] to form a pseudorotaxane-based molecular switch in response to pH stimuli. The glutathione peroxidase (GPx) activity of the artificial selenoenzyme can be switched on/off in a mild and body suitable environment between pH = 7 and pH = 6. [ABSTRACT FROM AUTHOR]

Herein, a new organic cationic matrix [N(CH 3 ) 4 ] 3 MoO 3 F 3 suitable for Mn 4+ doping was constructed. Due to the large steric hindrance of N[CH 3 ] 4 + (TMA), charge compensation defects can be effectively prevented in the heterovalent Mn 4+ -doping process, and a high IQE (91.05%) was obtained. Through the cation co-doping strategy, Mg 2+ /Zn 2+ /Li + cations were introduced into the Mo 6+ cationic site, which improved the crystallinity of the matrix and reduced energy losses, so as to improve luminescence intensity, QE, thermal stability, water stability and other spectral properties. Meanwhile, [N(CH 3 ) 4 ] 2 TiF 6 :Mn 4+ phosphors with the same TMA organic cation and equivalent Mn 4+ doping were synthesized for comparison, and the effects of the Mg 2+ cation co-doping strategy on the spectral properties of phosphors with different matrix types (fluoride/oxyfluoride) and substitution types (equivalent/non-equivalent) were analyzed. These findings provide the basis for the preparation of new luminescent materials. Furthermore, according to the optical properties exhibited by these phosphors, they are packaged into WLED devices with excellent photoelectric properties, which are suitable for indoor lighting and display fields.