{5,10,15,20-tetra(2',6'-dihydroxyphenyl)porphyrinato-cobalt(II)} | 131007-10-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡咯
• 英文名称: {5,10,15,20-tetra(2',6'-dihydroxyphenyl)porphyrinato-cobalt(II)}
• 英文别名: cobalt(II)-5,10,15,20-tetrakis(2′,6′-dihydroxyphenyl)-21H,23H-porphyrin
• CAS: 131007-10-8
• 化学式: C₄₄H₂₈CoN₄O₈
• 分子量: 799.722
• InChiKey: PSLDGPGFKWRSAJ-QBAZFJJZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为产物：
  描述：

  2,6-二甲氧基苯甲醛 在 2,6-二甲基吡啶 、 三氟化硼乙醚 、 三溴化硼 作用下， 以 四氢呋喃 、 二氯甲烷 、 氯仿 为溶剂， 反应 5.0h， 生成 {5,10,15,20-tetra(2',6'-dihydroxyphenyl)porphyrinato-cobalt(II)}
  参考文献：
  名称：

  Selective ligand modification of cobalt porphyrins for carbon dioxide electrolysis: Generation of a renewable H2/CO feedstock for downstream catalytic hydrogenation

  摘要：

  Catalytic hydrogenation is an attractive approach to produce green fuels and chemicals. The building blocks for these processes may be effectively produced from renewable power via direct electrochemical reduction of carbon dioxide in an aqueous media. For the first time, the impact of increasing the local proton concentration of cobalt porphyrin was examined by synthesizing new cobalt porphyrins 2, Co(o-OCH3)TPP and cobalt porphyrin 3, Co(o-OH)TPP. Cobalt porphyrins coated on carbon paper converted carbon dioxide and water into a mixture of hydrogen and carbon monoxide in an aqueous electrolyte at near neutral pH. Increasing the local proton availability of the commercial cobalt porphyrin 1, accelerates hydrogen generation under heterogeneous conditions across the range of potentials tested (-0.85 to -1.5 V vs. Ag/AgCl) and demonstrates high Faradaic efficiencies (ca. 90%) at low over-potentials (ca. 540 mV). The culmination of this work can help identify key parameters that facilitate generation of sustainable reagents for catalytic hydrogenation under practical and scalable conditions.

  DOI：

  10.1016/j.ica.2020.119594

文献信息

• Synthesis, characterization, and oxygenation of bis-fenced porphyrinato iron(II) and cobalt(II) complexes
  作者：Eishun Tsuchida、Teruyuki Komatsu、Etsuo Hasegawa、Hiroyuki Nishide

  DOI：10.1039/dt9900002713

  日期：——

  10,15,20-tetra(2′,6′-dipivaloyl-oxyphenyl)porphyrinato-iron(II) and -cobalt(II), which have no amide residues but ester ones in the fence groups, have been synthesized. The iron(II) complex formed stable and reversible dioxygen adducts in toluene at 25 °C. The half-life for irreversible oxidation is longer than 1 d. The ligation properties for this complex with imidazole derivatives or dioxygen have

  受阻且对称性高的复合物5,10,15,20-四（2'，6'-二新戊酰基-氧苯基）卟啉铁（II）和-钴（II），没有酰胺残基但有酯基围栏组中的那些已被合成。铁（二））络合物在25°C下于甲苯中形成稳定且可逆的双氧加合物。不可逆氧化的半衰期超过1 d。已经确定了该配合物与咪唑衍生物或双氧的连接性能，并将其与单面受阻卟啉铁复合物的连接性能进行了比较。大环两侧的庞大基团降低了咪唑和双氧的结合常数。Mössbauer和红外光谱法已经阐明了咪唑衍生物在空间上受庞大基团限制的结合特性。对双氧缔合和解离的动力学研究表明，低的氧亲和力主要是由高配体解离速率引起的。