A new 3D silver(I) coordination polymer with croconate ligand displaying green luminescent

One new polymer, [Ag4(C5O5)2(H2O)2]n (C5O52− = croconate dianion), has been synthesized and characterized by element analysis, IR, Raman, single-crystal X-ray diffraction, PXRD, and luminescent analysis. X-ray structural analysis revealed that the ligand was de-protonized entirely and offered five oxygen donors taking part in the coordination, and the tetranuclear silver(I) ions showed 4 and 5 coordination geometries respectively. From the space perspective, the presence of 1D chains that are connected into 2D layers, which are further connected into 3D network can be found within the crystal structure by AgO and weak Ag⋯Ag interactions. The thermal decomposition process consists of the loss of corresponding water molecules below 380 °C and follow-up decomposition of the main structure. Under the excitation of 380 nm light, the complex displayed green luminescent emission at room temperature.