Construction of A Turn On Probe for Al3+ Based on Rhodamine B Derivative

As an unnecessary element for human body, aluminum can cause a variety of diseases when ingested in excess, so it is of great significance for Al3+ detection. A new rhodamine probe with excellent photochromic properties based on Al3+- induced ring-opening mechanism of the rhodamine spirolactam was proposed. Upon binding with Al3+, the generated 1:1 P1-Al3+ complex, confirmed by Job’s plot titrations analysis. Could exhibit a remarkable fluorescence enhancement with a limit of detection (LOD) of 0.33 μM, and colorimetric response toward Al3+ in presence of other common metal ions and anions. The design thought can enrich the development of probes for Al3+.