Mechanofluorochromic behaviors and latent fingerprint detection of triphenylamine-based compounds with mono-/bis-BF fluorophores.

To better understand the relationship between molecular structure of the mono-/bis-BF-core compounds and mechanofluoroboron behaviors, two pyridine-based difluoroboron compounds with triphenylamine group (TPA-ts-BF and TPA-ts-2BF) were designed and successfully synthesized, which TPA-ts-BF including a BF fluorophore and TPA-ts-2BF containing the bisBF fluorophores. Based on the photophysical properties measurements results, it was found that TPA-ts-2BF had more excellent intramolecular charge transfer characteristics than that of TPA-ts-BF, and exhibited significant aggregation-induced emission activity, however, TPA-ts-BF displayed typical aggregation-caused quenching phenomenon. Meanwhile, the emission spectrum of the solid powders of TPA-ts-2BF was red-shifted 52 nm after grinding, that of TPA-ts-BF was red-shifted 46 nm, which was resulted from crystalline state switching to amorphous state.

sp. nov. and sp. nov., from marine sponges.

Two novel strains, LHW50502 and LHW51113, were isolated from marine sponges obtained on Xisha Island, Hainan Province, PR China. Rods and cocci, typical characteristics of the genus , were observed. The strains contained -diaminopimelic acid as the diagnostic diamino acid in the cell-wall hydrolysates and galactose, arabinose, ribose and glucose as the whole-cell sugars.