教師資料查詢 | 類別: 期刊論文 | 教師: 魏和祥 WEI, HO-HSIANG (瀏覽個人網頁)

標題:Functional model for intradiol-cleaving catechol 1,2-dioxygenase: Synthesis, structure, spectra, and catalytic activity of iron(III) complexes with substituted salicylaldimine ligands
學年95
學期2
出版(發表)日期2007/06/10
作品名稱Functional model for intradiol-cleaving catechol 1,2-dioxygenase: Synthesis, structure, spectra, and catalytic activity of iron(III) complexes with substituted salicylaldimine ligands
作品名稱(其他語言)
著者魏和祥; Wei, Ho-hsiang; Wang, Chi-hueng; Lu, Jian-wei; Takeda, Masuo
單位淡江大學化學學系
出版者Elsevier
著錄名稱、卷期、頁數Inorganica Chimica Acta 360(9), pp.2944-2952
摘要A series of mononuclear iron(III) complexes with containing phenolate donor of substituted-salicylaldimine based ligands [Fe(L1)(TCC)] · CH3OH (1), [Fe(L2)(TCC)] · CH3OH (2), [Fe(L3)(TCC)] (3), and [Fe(L4)(TCC)] (4) have been prepared and studied as functional models for catechol dioxygenases (H2TCC = tetrachlorocatechol, or HL1 = N′-(salicylaldimine)-N,N-diethyldiethylenetriamine, HL2 = N′-(5-Br-salicylaldimine)-N,N-diethyldiethylenetriamine, HL3 = N′-(4,6-dimethoxy-salycyl-aldimine)-N,N-diethyl-diethylenetriamine, HL4 = N′-(4-methoxy-salicylaldimine)-N,N-diethyl-diethylenetriamine). They are structural models for inhibitors of enzyme-substrate adducts from the reactions of catechol 1,2-dioxygenases. Complexes 1–4 were characterized by spectroscopic methods and X-ray crystal structural analysis. The coordination sphere of Fe(III) atom of 1–4 is distorted octahedral with N3O3 donor set from the ligand and the substrate TCC occupying cis position, and Fe(III) is in high-spin (S = 5/2) electronic ground state. The in situ prepared iron(III) complexes without TCC, [Fe(L1)Cl2], [Fe(L2)Cl2], [Fe(L3)Cl2], and [Fe(L4)Cl2] are reactive towards intradiol cleavage of the 3,5-di-tert-butylcatechol (H2DBC) in the presence of O2 or air. The reaction rate of catechol 1,2-dioxygenase depends on the redox potential and acidity of iron(III) ions in complexes as well as the substituent effect of the ligands. We have identified the reaction products and proposed the mechanism of the reactions of these iron(III) complexes with H2DBC with O2.
關鍵字Non-heme iron protein;Model of catechol 1,2-dioxygenase;Mononuclear iron(III) complexes;Salicylaldimine;Crystal structure;Mössbauer effect;Model of catechol 1,2-dioxygenase
語言英文
ISSN0020-1693
期刊性質國外
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產學合作
通訊作者
審稿制度
國別荷蘭
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