Observation of two-photon excitation (760 nm) and emission of two responsive water soluble europium complexes is reported with cross-sections of up to 2 GM. Two-photon excitation spectra have also been measured, acquisition being achieved by the use of a cavity-dumped mode locked Ti-sapphire laser. Time-gated detection is used to differentiate the ligand fluorescence and metal centred emission in these europium complexes.
报告中观测到了两种反应性
水溶性
铕络合物的双光子激发(760 纳米)和发射,横截面高达 2 GM。此外,还测量了双光子激发光谱,通过使用空腔倾销模式锁定
钛蓝宝石激光器实现了采集。时间门控检测用于区分这些
铕络合物中的
配体荧光和
金属中心发射。