University of Chemical Technology and Metallurgy, Sofia, Bulgaria.
Faculty of Chemistry and Pharmacy, Sofia University 'St. Kliment Ohridski', Sofia, Bulgaria.
Luminescence. 2020 Sep;35(6):947-954. doi: 10.1002/bio.3809. Epub 2020 Apr 25.
A three-step synthesis was implemented to prepare a quaternary ammonium functionalized blue fluorescent poly(propylene imine) dendrimer modified with pyridinium salt of 4-acylamino-1,8-naphthalimide. The new cationic dendrimer absorbs in the ultraviolet light region and emits blue fluorescence. Its spectral characteristics in organic solvents and in an aqueous solution were studied. The influence of pH on the fluorescence intensity of the dendrimer was established with regard to its use as a pH sensor. The effect of hydroxyl ions on the absorption and fluorescence spectra in dry N,N-dimethylformamide was also investigated. The antimicrobial activity of the dendrimer was assessed against model pathogenic microorganisms in agar, liquid medium, and after its deposition on cotton fabric.
采用三步合成法制备了季铵盐功能化的蓝荧光聚（丙烯亚胺）树枝状大分子，其结构中修饰有 4-酰氨基-1,8-萘二甲酰亚胺的吡啶鎓盐。该新型阳离子树枝状大分子在紫外光区有吸收，发射蓝荧光。研究了其在有机溶剂和水溶液中的光谱特性。探讨了作为 pH 传感器时，pH 值对树枝状大分子荧光强度的影响。还研究了在干燥的 N,N-二甲基甲酰胺中，羟基对吸收和荧光光谱的影响。评估了树枝状大分子在琼脂、液体培养基中和沉积在棉织物上对模型致病微生物的抗菌活性。
