Studies of Co(II)(bis(1,10-phenanthrolin-2-yl)-amine) complex and Hexaazamacrocyclophane partical oxidized counducting material

• Main Authors: HSU, CHE- WEI, 許哲瑋
• Other Authors: Wang,Wen-Jwu
• Format: Others
• Language: en_US
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/40107358195924530161

碩士 === 淡江大學 === 化學學系 === 87 === Abstract: By heating the CP solid which have been protonation, in the ammonia atmosphere, We can obtain the Bis(1,10-ptenanthrolin-2-yl) amine ligand. The [H2DPA]Cl crystal was characterized by X-ray dif-fraction analysis. This showed well stacking structure and implied strong p-p interaction .We also observed the acid dissociation constants of [H2DPA]Cl from electronic absorption spectra. The pKa1 of the ligand was 5.4, pKa2 of the ligand was 8.0. A cobalt(Ⅱ) complex, [Co(HDPA)(OH)2],(HDPA= bis(1,10-ptenan-throlin-2-yl)amine) have been synthesized and characterized by EA, MASS and NMR. The pH dependent changes with isobestic point resulted in the spectroscopic titration of the complex was observed. The pKa of the complex was 8.8,and high pH value would be become dimer species. The paramagnetic shift of the cobalt(Ⅱ) complex in NMR spec-troscopy was investigated by isotropic shift in variable temperature studies. The conductance measurement showed weak electrolyte, and conductometric titration provided a convenient means for the location of end point in titrations. The cyclic voltammograms(CV) of the complex which changed solvent systems, showed three reversible redox peak,at 0.11V (CoⅢ/CoⅡ)，-1.33V(CoⅡ/CoⅠ)，-1.96V(ligand center). Reacting hexaazamacrocyclophane ligand with excess Iodine, We can obtain the conducting material. From EA,TGA spectroscopy, We can make sure that I3- existed. The EPR measurement showed no coupling interaction occured between hexaazamac-rocyclophane ligand. The conductivity at room temperature was 5.4x10-6Scm-1, and activation was 0.15eV.