Re(CO)3(2,2'-bipyridine)(2,3-dihydroxybenzoyl-4-aminopyridine)PF6 | 852818-18-9

• 英文名称: Re(CO)3(2,2'-bipyridine)(2,3-dihydroxybenzoyl-4-aminopyridine)PF6
• CAS: 852818-18-9
• 化学式: C₂₅H₁₈N₄O₆Re*F₆P
• 分子量: 801.612
• InChiKey: YCSQFFZJLGDSQP-UHFFFAOYSA-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

• 作为反应物：
  描述：

  sodium molybdate dihydrate 、 Re(CO)3(2,2'-bipyridine)(2,3-dihydroxybenzoyl-4-aminopyridine)PF6 在 HCl 作用下， 以 水 、 乙腈 为溶剂， 以47%的产率得到
  参考文献：
  名称：

  Spectroscopic and Structural Investigations Reveal the Signaling Mechanism of a Luminescent Molybdate Sensor

  摘要：

  A heteroditopic ligand H-2-L consisting of a dihydroxybenzene (catechol)-unit linked via an amide bond to a pyridyl-unit and its methyl-protected precursor Me-2-L were synthesized, characterized, and their photophysical properties investigated. The three accessible protonation states of the ligand, H-3-L+, H-2-L, and H-L-, showed distinct H-1 NMR, absorption and emission spectroscopic characteristics that allow pH-sensing. The spectroscopic signatures obtained act as a guide to understand the signaling mechanism of the luminescent pH and molybdate sensor [Re-(bpy)(CO)(3)(H-2-L)](+). It was found that upon deprotonation of the 2-hydroxy group of H-2-L, a ligand-based absorption band emerges that overlaps with the Re(d pi)-> bpy metal-to-ligand charge transfer (MLCT) band of the sensor, reducing the quantum yield for emission on excitation in the 370 nm region. In addition, deprotonation of the catechol-unit leads to quenching of the emission from the Re(d pi)-> bpy (MLCT)-M-3 state, consistent with photoinduced electron transfer from the electron-rich, deprotonated catecholate to the Re-based luminophore. Finally, reaction of 2 equiv of [Re(bpy)(CO)(3)(H-2-L)](+) with molybdate was shown to give the zwitterionic Mo(VI) complex [MoO2{Re(CO)(3)-(bpy)(L)}(2)], as confirmed by electrospray ionization (ESI) mass spectrometry and X-ray crystallography. The crystal structure determination revealed that two fully deprotonated sensor molecules are bound via their oxygen-donors to a cis-dioxo-MoO2 center.

  DOI：

  10.1021/ic1019422