Synthesis,Structure and Photophysical Property of the Schiff Base on N,N-Ethylene-bis(3,5-dichlorosalicylideneimine) and Its Salen-Co(Ⅱ) Complex

The ligand ethylenediamine-3,5-dichloro salicylaldehyde(HS) and its crystal Co(Ⅱ) complex(MS) were yielded.The compounds have been characterized on the basis of elemental analysis,IR and 1H NMR spectral studies.X-ray single-crystal diffraction of crystal MS1 showed a classical Salen-N2O2 tetrahedral coordination model,space group P1 with a = 25.73(2),b = 9.899(9),c = 6.753(6) ?,β = 103.467(10)o,V = 1673(3) ?3,Z = 4,C16H10Cl4 Co N2O2,Mr = 462.99,Dc = 1.838 g/cm3,F(000) = 924,μ(Mo Kα) = 1.678 mm-1(λ = 0.71073 ?),R = 0.0275 and w R = 0.0567 for 1247 observed reflections with I > 2σ(I).Furthermore,luminescent properties were evaluated by UV-Visible absorption and FL spectra.Meanwhile,the thermal stability of compound HS was investigated.TG-DTG showed that the decomposition temperature(Td) of the molecules is up to 256 ℃ and the compound has fine performance in thermal stability.The results also indicated that the target compound HS exhibited certain chemiluminescence properties under the conditions of different time of 365 nm UV light and different temperature.In general,this kind of multi-functional compounds has potential applications in the fields of information storage and nonlinear optical materials.