Complexes with Furyl-Substituted 3-Hydroxychromone: Synthesis, Characterization and Fluorescence Studies

2-(2-Furyl)-3-hydroxychromone (HL) reacts with MII ions in the formation of quadratic [Cu(L)2] (3), octahedral [M(L)2(OH2)2] (M = Co (1), Ni (2), Zn (4), Mn (5)) and seesaw [M(L)2] Sn (6), Pb (7)) complexes. Recrystallization complexes 1-3 presence pyridine lead to [M(L)2(py)2] (1a-3a) adducts. All compounds were characterized by Fourier transform infrared spectroscopy (FTIR). Complexes 1-7 analyzed UV-Vis diffuse reflectance spectroscopies. The estimated band gap energies range from 2.90-3.15 eV. crystal structure 6 7 revealed influence stereochemically active lone pair due their electronic configuration ns2. An intense fluorescence emission centered at approximately 600 nm (λexc 340 nm) has been observed for complex solid state. In N,N‑dimethylformamide (DMF) solution, showed two bands (468 538 when excited 300 380 nm, only one 385 420 nm.