A fast and selective probe for monitoring Pd2+ in aqueous medium via the dual-optical readoutA tribute to late Dr Tarkeshwar Gupta.Electronic supplementary information (ESI) available: Experimental details and X-ray analysis data. CCDC 991470 (1) and 991331 (1-Pd2+). For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c4cc03891f

A ready-to-use coordinative probe has been outlined for the detection of Pd 2+ at parts-per-million (ppm) levels which potentially meets real-world-challenges through a simple synthetic route, water based-activity, fast response, by-eye visualization, regenerative-action, high selectivity and the dual-optical readout for precise quantification. A fast, selective and regenerative probe for real-time monitoring of ppm levels of Pd 2+ in aqueous medium has been demonstrated.