Optical study of the formation of pyrrolo[2,3-d]pyrimidine-based fluorescent nanoaggregates
作者:Lina Skardžiūtė、Karolis Kazlauskas、Jelena Dodonova、Jonas Bucevičius、Sigitas Tumkevičius、Saulius Juršėnas
DOI:10.1016/j.tet.2013.09.044
日期:2013.11
Pyrrolo[2,3-d]pyrimidine derivatives possessing different sterically-hindered end-groups at position 7 of the heterocycle were studied and compared with respect to nanoaggregate formation ability by the reprecipitation method in aqueous solutions. The emergence of nanoaggregates with an increasing water fraction in THF/water mixture was traced by observing sudden changes in spectral and transient fluorescence
吡咯并[2,3- d]研究了在杂环的7位具有不同的空间位阻的端基嘧啶衍生物和相对于由在水溶液中的再沉淀法nanoaggregate形成的能力进行比较。与THF中的增加的水分数纳米聚集体的出现/水混合物,通过观察在伴有荧光效率接通光谱和瞬态荧光动力学的突然变化跟踪。获得具有最大20倍的发光效率提高的聚集诱导的发射。通过电子显微镜揭示了通过增加THF /水的比例将纳米聚集体的尺寸从约50nm调节至600nm。d ]嘧啶类的纳米颗粒。