A Stable 3D Zn-Coordination Polymer Sensor Based on Dual Luminescent Ligands for Efficient Detection of Multiple Analytes under Acid or Alkaline Environment

A novel 3D luminescent coordination polymer (LCP) [Zn 4 (3-dpyb) 2 (odpa) 2 (H 2 O) 3 ]·4H 2 O ( 1 ) (3-dpyb = N, N ′-bis (3-pyridinecarboxamide)-1,4-butane, H 4 odpa = 4, 4′-oxidiphthalic acid) was successfully synthesized under solvothermal conditions. LCP 1 displays remarkable fluorescent behavior and stability in a wide range of pH values and different pure organic solvents. More importantly, LCP 1 can become an outstanding candidate in the selective sensing of Fe 3+, Bi 3+, Cr 2 O 7 2–, MnO 4 –, nitrobenzene (NB), acetaldehyde (AH), and acetylacetone (Hacac) under a lower detection limit. The change process of fluorescent intensity of these seven analytes in a diverse pH range indicates that LCP 1 can be an excellent luminescent sensor in multiple acid/base solutions. As far as we know, it is an infrequent example of a CP-based multiresponsive fluorescent sensor for metal cations, oxyanions, and toxic organic solvents under an acid or alkaline environment.