Two coordination polymers (CPs) [Zn(PTA)(DTP)(H₂O)₂]·(DMF) (CP-1) and [Zn(BTC)(DTP)]·(CH₃CN)_1.5·(H₂O)₄ (CP-2) with one- and two-dimensional architectures were synthesized from Zn(II) ion and different organic linkers like terephthalic acid (H₂PTA), benzene-1,3,5-tricarboxylic acid (H₃BTC), and 3,5-di(1,2,4-triazol-1-yl) pyridine (DTP). The fluorescent sensing experiments showed that the two CPs displayed effective, sensitive, and selective abilities towards Fe³⁺ and Cr₂O₇^2-. For sensing the pesticides, CP-1 outperforms in sensing of metamitron (MMT) and CP-2 is ultrasensitive towards imidacloprid (IMI). The possible mechanisms involved in the quenching of the fluorescence intensity include the inner filter effect (IFE) and the fluore- scence resonance energy transfer (FRET) effect.