Cysteine optical sensing with an up-conversion host and two chemosensors derived from rhodamine: Construction, characterization and performance.

This paper focused on two rhodamine chemosensors for cysteine optical sensing. To minimize their photobleaching caused by excitation light, up-conversion NaYF4:Yb3+/Er3+ nanocrystals were prepared and used as excitation host. Photophysical measurement on this host and the two chemosensors suggested that chemosensor absorption matched well with host emission… (More)