AE Arbuzov Institute of Organic and Physical Chemistry, Kazan, Russia.
Colloids Surf B Biointerfaces. 2012 Apr 1;92:327-33. doi: 10.1016/j.colsurfb.2011.12.015. Epub 2011 Dec 21.
The quenching effect of dyes (phenol red and bromothymol blue) on Tb(III)-centered luminescence enables to sense the aggregation of cationic and anionic surfactants near the silica surface of Tb-doped silica nanoparticles (SN) in aqueous solutions. The Tb-centered luminescence of non-decorated SNs is diminished by the inner filter effect of both dyes. The decoration of the silica surface by cationic surfactants induces the quenching through the energy transfer between silica coated Tb(III) complexes and dye anions inserted into surfactant aggregates. Thus the distribution of surfactants aggregates at the silica/water interface and in the bulk of solution greatly affects dynamic quenching efficiency. The displacement of dye anions from the interfacial surfactant adlayer by anionic surfactants and phospholipids is accompanied by the "off-on" switching of Tb(III)-centered luminescence.
染料（苯酚红和溴百里酚蓝）对铽（III）中心发光的猝灭效应使得能够在水溶液中检测到掺杂铽的二氧化硅纳米粒子（SN）的硅表面附近阳离子和阴离子表面活性剂的聚集。未修饰的 SNs 的铽中心发光由于两种染料的内滤效应而减弱。阳离子表面活性剂对二氧化硅表面的修饰通过插入到表面活性剂聚集体中的染料阴离子与涂覆二氧化硅的铽（III）配合物之间的能量转移导致猝灭。因此，表面活性剂聚集体在二氧化硅/水界面和溶液本体中的分布极大地影响动态猝灭效率。阴离子表面活性剂和磷脂从界面表面活性剂吸附层中取代染料阴离子伴随着铽（III）中心发光的“开-关”切换。
