- A Fluorescent Visual Proton Donor and Photoacid Sterilant Based on Sulfonate‐conjugated BODIPY
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Increasing acidity is an effective method for bacterial inactivation by inhibiting the synthesis of intracellular proteins at low pH. Photo-driven proton release probe can be used for the measurement of proton in hydrophobic condition. To develop fluorescent proton donor, two boron dipyrromethene derivatives (BDP-S and BDP-S2) were characterized by spectroscopic methods. Irradiation of BDP-S by white LED light resulted in efficient generation of acidic species with changes of fluorescence emission. The linear relationship between the pH value and the fluorescence intensity of BDP-S was obtained, indicating that BDP-S is a fluorescent visual proton donor. Light-induced antibacterial results indicate that BDP-S can significantly inhibit the growth of E. coli. The results prove that BDP-S is a very promising photoacid sterilant.
- Ali, Abbas Mohammed,Shao, Jian,Wang, Jia-Xin,Chen, Qiu-Yun,Li, Yang,Qu, Ling-Ling
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- New sulfured compounds
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New sulfurized compounds, their preparation and their use are described. They correspond to the general formula: {[R--SX --(CH2)n --]z CH3-z --(CH2)P --}2 Sy, in which R represents a monovalent hydrocarbon radical with 1 to 30 carbon atoms, optionally functionalized; x is a number equal to or greater than 1; z is an integer equal to 1 or 2; when z=1, n is an integer from 0 to 3 and p is an integer from 0 to 3, with n+p being an integer from 0 to 3; when z=2, n is an integer from 1 to 3 and p is an integer from 0 to 3; and y is a number equal to or greater than 1, at last one of the numbers x and y being strictly greater than 1. These sulfurized compounds can be used as extreme-pressure and anti-wear additives in lubricating oils, in particular oils for gear systems and oil for working metals.
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