نتایج جستجو برای: manganese ii
تعداد نتایج: 600747 فیلتر نتایج به سال:
Within photosynthetic organisms, the oxygen-evolving complex (OEC) of photosystem II generates dioxygen from water using a catalytic Mn(4)CaO(n) cluster (n varies with the mechanism and nature of the intermediate). We report here the rational synthesis of a [Mn(3)CaO(4)](6+) cubane that structurally models the trimanganese-calcium-cubane subsite of the OEC. Structural and electrochemical compar...
A series of new manganese phosphonate clusters with unprecedented topologies, [Mn(20)Na(4)O(12)(t-BuPO(3))(12)(O(2)CMe)(16)(H(2)O)(12)].5H(2)O (), [Mn(15)O(6)(MePO(3))(2)(MeCOO)(18)(H(2)O)(12)][MePO(3)H](2).12H(2)O (), and [Mn(t-BuPO(3)H)(2)(phen)(2)].MeCOOH () have been synthesized and characterized. The core of is composed of two folded "butterfly-like" [Mn(4)(mu(3)-O)(2)] units and two trigo...
Two pairs of enantiomorphic organic–inorganic hybrid manganese( ii ) halide clusters show excellent CPL properties and work as scintillators in X-ray detection imaging.
BACKGROUND Most toxicologic studies focus on a single agent, although this does not reflect real-world scenarios in which humans are exposed to multiple chemicals. OBJECTIVES We prospectively studied manganese-lead interactions in early childhood to examine whether manganese-lead coexposure is associated with neurodevelopmental deficiencies that are more severe than expected based on effects ...
The title compound, BaMnSnSe(4), was obtained by reaction of the elements at 1123 K in an evacuated silica tube. It adopts the BaCdSnS(4) structure type, which is a variant of the SrIn(2)Se(4) structure type. Its structure consists of distorted edge-sharing tetra-hedra, alternating with Mn and Sn atoms as central atom. These [MnSnSe(6)] units display corner sharing, forming stacked infinite lay...
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