Photodissociation of a (mu-peroxo)(mu-hydroxo)bis[bis(bipyridyl)-cobalt(III)] complex: a tool to study fast biological reactions involving O2.
Photodissociation of a (mu-peroxo)(mu-hydroxo)bis[bis(bipyridyl)-cobalt(III)] complex: a tool to study fast biological reactions involving O2.
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(mu-peroxo)(mu-Hydroxo)bis[bis(bipyridyl)-cobalt(III)] 复合物的光解离：研究涉及 O2 的快速生物反应的工具。
DOI：
10.1073/pnas.92.18.8105
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发表时间：
1995
影响因子：
11.1
通讯作者：
Einarsdóttir,O
中科院分区：
文献类型：
--
作者：
MacArthur,R;Sucheta,A;Chong,FF;Einarsdóttir,O
在355 nm处光解后，在水溶液中和生理pH下，从（μ-过氧）（μ-羟基）双[双（联吡啶基）钴-（III）]络合物中释放出分子氧，量子产率为0.04。[Co（bpy）2（H2O）2]2+（bpy = bipyridyl）的光产物在纳秒或更快的时间尺度上产生，如通过时间分辨光学吸收光谱所确定的。光谱变化和氧气产生之间的线性对应关系表明，O2是在相同的时间尺度上释放。氧合血红蛋白形成的（μ-过氧）（μ-羟基）双[双（联吡啶）钴（III）]复合物的光解后，从脱氧血红蛋白，验证双氧是一个主要的光产物。这种复合物和其他相关化合物提供了一种研究涉及O2的快速生物反应的方法，例如通过细胞色素氧化酶将分子氧还原为水。
Upon photolysis at 355 nm, dioxygen is released from a (mu-peroxo)(mu-hydroxo)bis[bis(bipyridyl)cobalt-(III)] complex in aqueous solutions and at physiological pH with a quantum yield of 0.04. The [Co(bpy)2(H2O)2]2+ (bpy = bipyridyl) photoproduct was generated on a nanosecond or faster time scale as determined by time-resolved optical absorption spectroscopy. A linear correspondence between the spectral changes and the oxygen production indicates that O2 is released on the same time scale. Oxyhemoglobin was formed from deoxyhemoglobin upon photodissociation of the (mu-peroxo) (mu-hydroxo)bis[bis(bipyridyl)cobalt(III)] complex, verifying that dioxygen is a primary photoproduct. This complex and other related compounds provide a method to study fast biological reactions involving O2, such as the reduction of dioxygen to water by cytochrome oxidase.