亚硒酸盐 | 14124-67-5

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 其他混合金属/非金属含氧阴离子化合物
• 中文名称: 亚硒酸盐
• 英文名称: selenite anion
• 英文别名: selenite；Selenite ion
• CAS: 14124-67-5
• 化学式: O₃Se
• 分子量: 126.958
• InChiKey: MCAHWIHFGHIESP-UHFFFAOYSA-L

计算性质

• 辛醇/水分配系数(LogP)：
  -2.88
• 重原子数：
  4.0
• 可旋转键数：
  0.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  63.19
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  亚硒酸盐 以 水 为溶剂， 生成 selenate
  参考文献：
  名称：

  The Decomposition of Water by X‐Rays in the Presence of the Iodide or Bromide Ion

  摘要：

  DOI：

  10.1063/1.1749738
• 作为产物：
  描述：

  在 CO₃^(2-) 作用下， 以 水 为溶剂， 生成 亚硒酸盐
  参考文献：
  名称：

  硒（V）。脉冲放射分解研究

  摘要：

  DOI：

  10.1021/j100412a112
• 作为试剂：
  描述：

  邻苯二胺 在 亚硒酸盐 作用下， 以 乙醇 为溶剂， 生成 2,1,3-苯并硒二唑
  参考文献：
  名称：

  形成挥发性衍生物并使用涡旋辅助分散液-液微萃取预浓缩后，通过气相色谱-质谱法测定硒

  摘要：

  在本研究中，提出了一种简单快速的衍生化和预富集方法，称为涡旋辅助分散液-液微萃取（VA-DLLME），用于在形成其挥发性衍生物后通过气相色谱-质谱法（GC-MS）测定硒。与o-湖水样品中的苯二胺 (Se-PDA-FVD)。通过实施开发的衍生化程序，利用气相色谱系统来测定无机硒。采用 VA-DLLME 方法通过预浓缩分析物来增强 GC-MS 系统的检测能力。优化衍生化和萃取程序变量，包括缓冲溶液的 pH 值和体积、衍生剂的体积、混合的类型和时间段、分散剂和萃取溶剂的类型/体积，以提高萃取产量。在最佳衍生/预富集条件下，测定了VA-DLLME-Se-PDA-FVD-GC-MS方法的分析性能。检测限 (LOD) 和定量限 (LOQ) 计算为 2.2 ng mL -1分别为7.3 ng mL -1 和7.3 ng mL -1。用湖水进行加标实验，以检验该方法的准确性和适用性。加标样品的回收率结果在

  DOI：

  10.1039/d3nj01949g

文献信息

• Analogue Reaction Systems of Selenate Reductase
  作者：Jun-Jieh Wang、Christian Tessier、R. H. Holm

  DOI：10.1021/ic0521630

  日期：2006.4.1

  all other cases of substrate reduction by oxo transfer, the kinetic metal effect k(2)W > k(2)Mo holds. A proposal from primary sequence alignments suggesting that a conserved Asp residue is a likely ligand in the type II enzymes in the DMSO reductase family has been pursued by synthesis of the [Mo(IV)(O2CR)(S2C2Me2)2](1-) (R = Ph, Bu(t)) complexes. The species display symmetrical eta2-carboxylate binding

  使用Mo（IV）的双（二硫代戊二烯）络合物开发了硒酸还原酶的模拟反应系统，该系统可减少整个酶促反应SeO4（2-）+ 2H + + 2e--> SeO3（2-）+ H2O中的底物。和W（IV）。根据氧化和还原酶的EXAFS分析结果，极有可能发生Mo（IV）OH + SeO4（2-）-> Mo（VI）O（OH）+ SeO3（2-）的最小反应。制备方形金字塔状复合物[M（OMe）（S2C2Me2）2]（1-）（M = Mo，W）作为还原酶位点的结构类似物。乙腈中的[ML（S2C2Me2）2]（1-）/ SeO4（2-）（L = OMe，OPh，SC6H2-2,4,6-Pr（i）3）系统干净地将硒酸还原为亚硒酸盐活化反应的负熵暗示缔合过渡态的二阶反应。298 K时的速率常数在10（-2）-10（-4）M（-1）s（-1）范围内，DeltaS ++ = -12至-34 eu。当将速率常数与通过氧原
• Equilibrium and kinetic studies of Se(<scp>vi</scp>) removal by Mg–Al layered double hydroxide doped with Fe²⁺
  作者：Tomohito Kameda、Eisuke Kondo、Toshiaki Yoshioka

  DOI：10.1039/c4ra11645c

  日期：——

  Schematic diagram for Se(vi) removal by the Fe²⁺-doped Mg–Al layered double hydroxide.

  用Fe²⁺掺杂的Mg-Al层状双氢氧化物去除Se(vi)的示意图。
• Reductive Reaction of Selenate with Hydrazine over TiO₂-supported Pt Catalyst in Aqueous Solution
  作者：Jinxian Zhao、Hideki Matsune、Sakae Takenaka、Masahiro Kishida

  DOI：10.1246/cl.150695

  日期：2015.11.5

  Although there has been no report on the catalytic reaction of selenate over heterogeneous catalysts in aqueous solution, we found that titania-supported Pt catalysts exhibited significantly high activity for the reduction of selenate with hydrazine. The Pt catalysts were deactivated during the reaction because of the deposition of Se metal, but showed excellent reusability. Therefore, it was firstly demonstrated that heterogeneous catalysts are effective for the removal of selenate from aqueous solution.

  尽管尚未有关于硒酸盐在水相溶液中使用异相催化剂催化反应的报道，我们发现钛酸钡支持的铂催化剂对氢肼还原硒酸盐表现出显著的高活性。在反应过程中，铂催化剂因金属硒的沉积而失活，但显示出优良的重复使用性。因此，首次证明了异相催化剂在去除水相溶液中的硒酸盐方面是有效的。
• Bacterial respiration of arsenic and selenium
  作者：John F. Stolz、Ronald S. Oremland

  DOI：10.1111/j.1574-6976.1999.tb00416.x

  日期：1999.10

  Oxyanions of arsenic and selenium can be used in microbial anaerobic respiration as terminal electron acceptors. The detection of arsenate and selenate respiring bacteria in numerous pristine and contaminated environments and their rapid appearance in enrichment culture suggest that they are widespread and metabolically active in nature. Although the bacterial species that have been isolated and characterized are still few in number, they are scattered throughout the bacterial domain and include Gram-positive bacteria, beta, gamma and epsilon Proteobacteria and the sole member of a deeply branching lineage of the bacteria, Chrysiogenes arsenatus. The oxidation of a number of organic substrates (i.e. acetate, lactate, pyruvate, glycerol, ethanol) or hydrogen can be coupled to the reduction of arsenate and selenate, but the actual donor used varies from species to species. Both periplasmic and membrane-associated arsenate and selenate reductases have been characterized. Although the number of subunits and molecular masses differs, they all contain molybdenum. The extent of the environmental impact on the transformation and mobilization of arsenic and selenium by microbial dissimilatory processes is only now being fully appreciated.

  砷和硒的氧化亚离子可用作微生物厌氧呼吸的终端电子受体。在许多原始和污染环境中检测到砷酸盐和硒酸盐呼吸细菌，且其在富集培养基中迅速出现，这表明它们在自然界中广泛存在且代谢活跃。尽管分离和鉴定的细菌种类仍然很少，但它们遍布整个细菌领域，包括革兰氏阳性菌、β、γ和ε变形杆菌以及细菌深分支谱系中的唯一成员——砷化金黄单胞菌。一些有机底物（如乙酸盐、乳酸、丙酮酸、甘油、乙醇）或氢的氧化可与砷酸盐和硒酸盐的还原作用相结合，但实际使用的供体因物种而异。胞外和膜结合砷酸盐和硒酸盐还原酶的特征已经确定。尽管亚基数量和分子质量不同，但它们都含有钼。现在人们才充分认识到环境对微生物异化过程中砷和硒的转化和迁移的影响程度。
• Involvement of a putative molybdenum enzyme in the reduction of selenate by Escherichia coli
  作者：Magali Bébien、Julia Kirsch、Vincent Méjean、André Verméglio

  DOI：10.1099/00221287-148-12-3865

  日期：2002.12.1

  Selenium oxyanions, particularly selenite, can be highly toxic to living organisms. Few bacteria reduce both selenate and selenite into the less toxic elemental selenium. Insights into the mechanisms of the transport and the reduction of selenium oxyanions in Escherichia coli were provided by a genetic analysis based on transposon mutagenesis. Ten mutants impaired in selenate reduction were analysed. Three of them were altered in genes encoding transport proteins including a porin, an inner-membrane protein and a sulfate carrier. Two mutants were altered in genes required for molybdopterin biosynthesis, strongly suggesting that the selenate reductase of E. coli is a molybdoenzyme. However, mutants deleted in various oxomolybdenum enzymes described so far in this species still reduced selenate. Finally, a mutant in the gene ygfK encoding a putative oxidoreductase was obtained. This gene is located upstream of ygfN and ygfM in the ygfKLMN putative operon. YgfN and YgfM code for a molybdopterin-containing enzyme and a polypeptide carrying a FAD domain, respectively. It is therefore proposed that the selenate reductase of E. coli is a structural complex including the proteins YgfK, YgfM and YgfN. In addition, all the various mutants were still able to reduce selenite into elemental selenium. This implies that the transport and reduction of this compound are clearly distinct from those of selenate.

  硒氧化阴离子，特别是亚硒酸盐，对生物体具有剧毒。很少有细菌能将亚硒酸盐和亚硒酸还原成毒性较低的元素硒。基于转座子诱变技术的遗传分析为大肠杆菌中硒氧化阴离子的转运和还原机制提供了见解。研究人员分析了10个亚硒酸盐还原缺陷突变体。其中3个突变体的转运蛋白编码基因发生了改变，包括一种孔蛋白、一种内膜蛋白和一种硫酸盐载体蛋白。两个突变体的钼蛋白生物合成所需基因发生了改变，这有力地表明大肠杆菌的亚硒酸盐还原酶是一种钼蛋白酶。然而，该物种中迄今描述的各种氧化钼酶缺失的突变体仍然能够还原亚硒酸盐。最后，研究人员获得了编码假定氧化还原酶的基因ygfK的突变体。该基因位于ygfN和ygfM上游的ygfKLMN假定操作子中。YgfN和YgfM分别编码一种含钼蛋白酶和一种携带FAD结构域的多肽。因此，研究人员提出大肠杆菌的亚硒酸盐还原酶是一种结构复合物，包括YgfK、YgfM和YgfN蛋白。此外，所有这些突变体仍然能够将亚硒酸盐还原成元素硒。这意味着这种化合物的转运和还原与亚硒酸盐的转运和还原明显不同。