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Two organic ligands of imidazoles base on 1,8-Naphthalimide derviatives and ten Schiff base on 1,8-Naphthalimide derviatives have been synthesized and characterized by elemental analysis, IR spectra, UV spectra, 1HNMR spectra, and single crystal X-ray diffraction. Three single crystal structures of the ligands have been determined, which are 6-Oxobenz[de]isoquinolino[2,1-a]–benzimi dazolium chloridem onohydrate(2a), N-(2-Hydroxybenzylideneamino)-1,8-naphthalimide(3a), and 4-Br-N-(p-phenylenediaminesalicylaldehyde)-1,8-naphthalimide(3h). The fluores- cence properties have been studies by Solid State Fluorescence approach, and the results indicate that the fluorescent intensities of 6-Oxobenz[de]isoquinolino[2,1-a]– benzimi dazolium chloridemonohydrate have strong intensities, and they are good fluorescent compounds. But, 4-Br-6-Oxobenz[de]isoquinolino[2,1-a]-benzimida- zolium chloride monohydrate have been vanished by themselves.Twenty mental compounds are synthesized using two ligands of the N-(2-Hydroxybenzylideneamino)-1,8-naphthalimide (3a) and 4-Br-N-(p-phenylene diaminesalicylaldehyde)-1,8-Naphthalimide derviatives (3h). These complexes were synthesized via the reaction of the ligands with halide of transition metal, such as Ni(II), Cu(II), Co(II), Zn(II), Fe(II) in ratio of 2:1, and then characterized by elemental analysis and IR spectra. The complexes for Cu(II), Co(II) ,Ni(II) of (3a) and Cu(II) of (3h) were obtained and characterized by elemental analysis, IR spectra, UV spectra analysis, and TG./DTG. The crystal structure of complexes [C44H36CuN6O8](4a) and [C44H36CoN6O8](4b) have been determined. The thermal stability of the complexes have also been studiedA series of 1,8-Naphthalimide derviatives has been desgined and synthesised, and three crystal structures were obtained. These compounds have been characterized by elemental analysis, IR spectra, UV spectra. Moreover for 1,8-Naphthalimide derivatives, density functional theory (DFT) method calculations of the structure, electronic spectra have been performed at B3LYP/6-311G** level. The results of the calculations have been compared with experimental data and they are found to support each other, which provide useful information for the further study on 1,8-Naphthalimide derivatives.
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