Abstract
A series of rhodamine spiro-leuco compounds have been developed as fluorescence-enhanced sensors for optical sensing of palladium ion (Pd 2+). The initial rhodamine hydrazone derivatives, RPd1-a, RPd1-b, and RPd1-c, display a good coordination to Pd2+ inducing the spirolactam-open reaction with a significant fluorescence enhancement and color generation. Different stoichiometry results, 1:2 in EtOH/H2O and 1:1 in MeOH/DCM were observed for Pd2+/RPd1-c complexation.
| Original language | English |
|---|---|
| Pages (from-to) | 4357-4361 |
| Number of pages | 5 |
| Journal | Tetrahedron Letters |
| Volume | 54 |
| Issue number | 33 |
| DOIs | |
| State | Published - 14 Aug 2013 |
| Externally published | Yes |
Keywords
- Optical sensing
- Palladium ion
- Rhodamine hydrazone
- Selectivity
- Stoichiometry