Synthesis of fourteen new complexes of meso-tetrakis（4-alkoxyphenyl） porphyrins with Co2+, Cu2+, Zn2+, Pb2+ were presented in this paper. Meso-tetrakis （4-alkoxyphenyl） porphyrins were prepared by condensation of ...Synthesis of fourteen new complexes of meso-tetrakis（4-alkoxyphenyl） porphyrins with Co2+, Cu2+, Zn2+, Pb2+ were presented in this paper. Meso-tetrakis （4-alkoxyphenyl） porphyrins were prepared by condensation of 4-alkoxybenzaldehydes with pyrrole, then treated with corresponding metallic acetate to produce mentioned complexes, IR, UV, 1H NMR, MS and elementary analysis were explored to confirm the structures of all theses new complexes. Characteristic spectrometric data of IR, UV, 1H NMR related to these complexes have been systematically summarized. Ten of the fourteen complexes were found to exhibit liquid crystal properties.展开更多
A silylated PNP ligand with asymmetric structure was synthesized using(γ-aminopropyl)triethoxysilane and chlorodiphenyl phosphine as raw materials.The optimal synthetic conditions of the PNP ligand were obtained by c...A silylated PNP ligand with asymmetric structure was synthesized using(γ-aminopropyl)triethoxysilane and chlorodiphenyl phosphine as raw materials.The optimal synthetic conditions of the PNP ligand were obtained by conditional experiments and were as follows:dichloromethane was solvent,triethylamine was acid acceptor,the mole ratio of chlorodiphenylphosphine and(γ-aminopropyl)triethoxysilane was 2.1∶1,the dropping temperature of chlorodiphenylphosphine was-5℃,the dropping time was 30 min,the reaction temperature was 25℃and the reaction time was 12 h.Under the conditions,the yield of the silylated PNP ligand was 91.20%.Based on grey correlation analysis,the dropping temperature was the main factor for the yield of the silylated PNP ligand.The single-active central chromium catalyst based on the silylated PNP ligand was synthesized by complexation reaction with the silylated PNP ligand and chromium chloride tetrahydrofuran complex as materials,and the yield was 95.25%.The chemical structures of the silylated PNP ligand and the corresponding chromium catalyst were confirmed by elemental analysis,FT-IR,^(1)H NMR,MS and ICP.The single-active central chromium catalyst based on the silylated PNP ligand had good catalytic activity for ethylene oligomerization,and the content of C_(8)olefin was 72.40%,which was superior to Si-Schiff-Cr based on intermolecular coordination.展开更多
文摘Synthesis of fourteen new complexes of meso-tetrakis（4-alkoxyphenyl） porphyrins with Co2+, Cu2+, Zn2+, Pb2+ were presented in this paper. Meso-tetrakis （4-alkoxyphenyl） porphyrins were prepared by condensation of 4-alkoxybenzaldehydes with pyrrole, then treated with corresponding metallic acetate to produce mentioned complexes, IR, UV, 1H NMR, MS and elementary analysis were explored to confirm the structures of all theses new complexes. Characteristic spectrometric data of IR, UV, 1H NMR related to these complexes have been systematically summarized. Ten of the fourteen complexes were found to exhibit liquid crystal properties.
基金supported by Key Research and Development Project of Heilongjiang Province(JD22A026)
文摘A silylated PNP ligand with asymmetric structure was synthesized using(γ-aminopropyl)triethoxysilane and chlorodiphenyl phosphine as raw materials.The optimal synthetic conditions of the PNP ligand were obtained by conditional experiments and were as follows:dichloromethane was solvent,triethylamine was acid acceptor,the mole ratio of chlorodiphenylphosphine and(γ-aminopropyl)triethoxysilane was 2.1∶1,the dropping temperature of chlorodiphenylphosphine was-5℃,the dropping time was 30 min,the reaction temperature was 25℃and the reaction time was 12 h.Under the conditions,the yield of the silylated PNP ligand was 91.20%.Based on grey correlation analysis,the dropping temperature was the main factor for the yield of the silylated PNP ligand.The single-active central chromium catalyst based on the silylated PNP ligand was synthesized by complexation reaction with the silylated PNP ligand and chromium chloride tetrahydrofuran complex as materials,and the yield was 95.25%.The chemical structures of the silylated PNP ligand and the corresponding chromium catalyst were confirmed by elemental analysis,FT-IR,^(1)H NMR,MS and ICP.The single-active central chromium catalyst based on the silylated PNP ligand had good catalytic activity for ethylene oligomerization,and the content of C_(8)olefin was 72.40%,which was superior to Si-Schiff-Cr based on intermolecular coordination.
