Investigation of the Reduced High-Potential Iron−Sulfur Protein from <i>Chromatium vinosum</i> and Relevant Model Compounds: A Unified Picture of the Electronic Structure of [Fe<sub>4</sub>S<sub>4</sub>]<sup>2+</sup> Systems through Magnetic and Optical Studies
作者:Latévi M. Lawson Daku、Jacques Pécaut、Alix Lenormand-Foucaut、Béatrice Vieux-Melchior、Peter Iveson、Jeanne Jordanov
DOI:10.1021/ic034494n
日期:2003.10.1
newly synthesized 2(2)(-), 3(2)(-), 5(2)(-), and 6(2)(-) complexes are, as 1(2)(-) and 4(2)(-), excellent models of the reduced HiPIPs: they exhibit the [Fe(4)S(4)](3+/2+) redox couple, because of the presence of bulky ligands which stabilize the [Fe(4)S(4)](3+) oxidized core. Moreover, the presence of SCH(2) groups in 4(2)(-), 5(2)(-), and 6(2)(-), as in the [Fe(4)S(4)] protein cores, makes them good
在4-300 K的温度范围内,已使用磁化测量和可变温度光谱法研究了来自Chromatium vinosum和模型化合物(Cat)的还原型高电势铁蛋白(HiPIP)的电子结构[2] [ Fe(4)S(4)(SR)(4)],其中RS(-)= 2,4,6-三异丙基苯基硫醇盐(1),2,6-二苯基苯基硫醇盐(2),二苯基甲基硫醇盐(3),2,4 ,6-三异丙基苄基硫醇盐(4,4'),2,4,6-三苯基苄基硫醇盐(5,5'),2,4,6-三叔丁基苄基硫醇盐(6)和Cat(+)=(+)NEt (4)(1、2、3、4',5',6),(+)PPh(4)(4、5)。新合成的2(2)(-),3(2)(-),5(2)(-)和6(2)(-)配合物分别为1(2)(-)和4(2 )(-),降低的HiPIP的出色模型:它们具有[Fe(4)S(4)](3 + / 2 +)氧化还原对,因为存在稳定[Fe(4)S(4)]