Engineering Air-Stable Triarylmethyl Radicals with One Pyrrole Ring.

Herein, seven air-stable triarylmethyl radicals (-), each featuring a pyrrole ring, were successfully synthesized. A comprehensive investigation into the linkages at the α-, β-, and -positions of the pyrrole ring, along with various substituents, revealed that the p-π conjugation between the central radical carbon and the pyrrole ring plays a crucial role in the distribution of spin density and overall stability. Notably, radicals to displayed excellent electrochemical and photostability.

Rapid detection of sludge moisture content based on the frequency domain reflection.

The moisture content (MC) of sludge is a critical factor affecting sludge treatment and disposal technologies. Traditional drying methods for measuring sludge MC are time-consuming and lack of portability. To achieve rapid online detection of sludge MC, this paper proposes a method based on frequency domain reflectometry.

The SUMO (Singly Unoccupied Molecular Orbital)-LUMO (Lowest Unoccupied Molecular Orbital) Inversion Radicals.

Herein, SUMO-LUMO inversion (SLI) radicals - were designed by the combination of the tris(2,4,6-trichlorophenyl)methyl (TTM) radical and pyridinium derivatives (electron-withdrawing groups) for the first time. The energy of the LUMO lies below that of the SUMO, which deviated from the Aufbau principle as an alternative electronic configuration beyond the well-established SOMO-HOMO inversed system. Thus, for SLI radicals, the injection of one extra electron preferred to occupy the LUMO rather than the SUMO, giving diradicals, one of which had been fully confirmed by single crystal analysis, VT-NMR and VT-EPR experiments, as well as DFT calculations.

Microglia heterogeneity during neuroinflammation and neurodegeneration in the mouse retina.

Microglia play important roles in maintaining homeostasis and immunoreactive defense in the central nervous system including retina. To accomplish such a wide range of functions, microglia are highly heterogeneous. Dark microglia (DM) were recently identified by electron microscopy (EM).