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首页> 外文期刊>Chemistry: A European journal >Complexation and extraction of PAHs to the aqueous phase with a dinuclear Pt~(II) diazapyrenium-based metallacycle
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Complexation and extraction of PAHs to the aqueous phase with a dinuclear Pt~(II) diazapyrenium-based metallacycle

机译：双核Pt〜（II）二氮杂re基金属环配合物将PAHs络合并萃取到水相中

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摘要

New palladium and platinum metallacycles have been synthesized by reaction between a 2,7-diazapyrenium-based ligand and Pd~(II) and Pt~(II) complexes. The inclusion complexes between the metallacycles and polycyclic aromatic hydrocarbons (PAHs) in CD_3NO_2 and D_2O were studied by NMR spectroscopy. The structures of the inclusion complexes of the Pt metallacycle as host with pyrene, phenanthrene, and triphenylene were confirmed by single crystal X-ray crystallography. The association constants between the Pt metallacycle and the selected PAHs were determined in CH _3CN following the characteristic charge-transfer band displayed in their UV/Vis absorption spectrum. Although in aqueous solution all the complexes showed a 1:1 stoichiometry, in CH_3CN the Job plot indicated a 2:1 stoichiometry for complexes with triphenylene and benzo[a]pyrene. The estimated association constants in water correlate with the hydrophobicity of the PAH, indicating that hydrophobic forces play an important role in the complexation process. SuPAH extraction! New metallacycles have been synthesized by self-assembly between a 2,7′-diazapyrenium-based ligand and Pd ~(II) and Pt~(II) complexes. The inclusion complexes between the metallacycles and polycyclic aromatic hydrocarbons (PAHs) in CD_3CN and D_2O were studied. The structures of complexes with pyrene, phenanthrene, and triphenylene were confirmed by single-crystal X-ray crystallography (see graphic). The estimated association constants in water correlate with the hydrophobicity of the PAH.
机译：通过2,7-二氮杂py基配体与Pd〜（II）和Pt〜（II）配合物的反应合成了新的钯和铂金属环。核磁共振波谱研究了CD_3NO_2和D_2O中金属环与多环芳烃（PAHs）之间的包合物。通过单晶X射线晶体学证实了Pt金属环作为主体与，菲和联苯的包合物的结构。在CH _3CN中，根据在它们的UV / Vis吸收光谱中显示的特征性电荷转移带，确定Pt金属环与所选PAH之间的缔合常数。尽管在水溶液中所有配合物均显示1：1的化学计量比，但在CH_3CN中，Job图显示与三亚苯基和苯并[a] re配合物的化学计量比为2：1。估计的水中缔合常数与PAH的疏水性相关，表明疏水力在络合过程中起重要作用。 SuPAH提取！通过在2,7'-二氮杂re基配体与Pd〜（II）和Pt〜（II）配合物之间进行自组装，合成了新的金属环。研究了CD_3CN和D_2O中金属环与多环芳烃（PAHs）的包合物。通过单晶X射线晶体学证实了与with，菲和三亚苯基的配合物的结构（见图）。估计的水中缔合常数与PAH的疏水性相关。

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