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In recent years, low-dimensional organic–inorganic hybrid lead halide perovskites have been explored as photoluminescent (PL) materials with high photoluminescence quantum efficiencies and tunable band structures arising from the structural regulating functions of organic cations. Herein, by using a simple solution reaction, we prepared one new type of one-dimensional (1D) hybrid lead halide, namely [DMEDA]PbCl4 (DMEDA = N,N′-dimethylethylenediamine). The compound contains 1D edge sharing octahedral lead chloride [PbCl4]2− anionic chains, which are surrounded and separated by organic cations of [DMEDA]2+. This 1D structure enables the formation of self-trapped excited states that give bright yellow emission with a photoluminescence quantum efficiency (PLQE) of approximately 4.81%. A white light emitting device can also be easily fabricated by coating a sample of [DMEDA]PbCl4 on a blue light chip. Its PL stability and nature are also investigated by using various experiments. This work provides a new type of structural model to probe the PL properties and understand the structure–property relationship of low-dimensional lead halide perovskites. [ABSTRACT FROM AUTHOR]

Objective The biotransformation of vancomycin by endophytic fungi isolated from var. (Franch.) Hand.-Mazz was studied. Methods Endophytes were isolated and screened for their biotransformational abilities. Afterwards, these endophytic fungi having transformation abilities were identified. Results Two strains of the endophytic fungi were able to transform vancomycin. Based on their 26S rDNA or ITS sequences, they were identified as and. After strains G01 and G03 cultivated for 6 days in liquid media containing vancomycin, the peak area of vancomycin decreased and new absorption peaks appeared according to the high performance liquid chromatography (HPLC). Conclusion Some new components were produced by fermentation of the two stains of endophytic fungi. [ABSTRACT FROM AUTHOR]