摘要
在无氧条件下测定了一种新型尾式卟啉铁[5-邻-(4-二甲氮基丁酰胺)苯基-10,15,20-三苯基卟啉铁(Ⅱ)及其含N配体、CO、NO轴向加合物的磁圆二色(MCD)光谱,考察了轴向混合配位时MCD光谱的变化.
The magnetic circular dichroism spectra of new tailed porphyrin iron complexes, MDMBPTPPFe( Ⅲ )Cl and MDMBPTPPFe( Ⅱ ) with a series of axial ligands such as imidazole, pyri-dine,4-methylpyridine, piperidine, Et3N, Et2NH, n-C4H9NH2,n-C3H7NH2, CO, NO, were observed. The MCD of high spin ferric porphyrin complex is type B which is ascribed to the angular momenta induced by the external magentic field, because of appreciable configuration mixings due to the charge-transfer excited states of exactly the same symmetry Eu3. The ligands binding to the five-coordination ferrous porphrin is accompanied by dramatic changes in the visible and soret region of the optical spectrum. The MCD of the mixing axial ligands ferrous porphyrin complexes differs form that of the bisli-gands ferrous prophyrin complexes in the region of 530 to 560 nm because of the difference between the symmetries of the two complexes. The MCD of ferrous porphyrin complexes is type A , which is contributed by the transitions from the nondegenerate ground state to the degenerate excited state.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第2期161-164,共4页
Chemical Journal of Chinese Universities
关键词
卟啉
铁
磁圆二色谱
尾式
Porphyrin, Magnetic circular dichroism(MCD), Axial ligand
