Recognition of phosphate monoester dianion by an alkoxide-bridged dinuclear zinc(II) complex
Recognition of phosphate monoester dianion by an alkoxide-bridged dinuclear zinc(II) complex
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DOI：
10.1039/b400269e
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发表时间：
2004-01-01
影响因子：
4
通讯作者：
Koike, T
中科院分区：
文献类型：
--
作者：
Kinoshita, E;Takahashi, M;Koike, T
研究了烷氧桥接双核锌（II）配合物（Zn2L3+）对磷酸单酯二离子的识别（L = 1,3-二[二（吡啶-2-甲基）氨基]丙二醇的烷氧类）。电位pH滴定研究揭示了在水溶液中与Zn2L3+的1:1苯基磷酸络合。解离常数（= [Zn2L3+][PhOPO32-]/[Zn2L+-PhOPO32-]）在25°c下为2.5 × 10(-8) mol dm(-3), I = 0.10 （NaNO3）。对磷酸对硝基苯基二锌配合物的x射线晶体分析表明，磷酸二锌离子作为桥接配体与两个锌离子结合。
Recognition of phosphate monoester dianion by an alkoxide-bridged dinuclear zinc(II) complex (Zn2L3+) has been studied (L = alkoxide species of 1,3-bis[bis(pyridin-2-ylmethyl)amino]propan-2-ol). Potentiometric pH titration study disclosed a 1 : 1 phenyl phosphate complexation with Zn2L3+ in aqueous solution. The dissociation constant (= [Zn2L3+][PhOPO32-]/[Zn2L+-PhOPO32-]) is an extremely small value of 2.5 x 10(-8) mol dm(-3) at 25degreesC with I = 0.10 (NaNO3). The X-ray crystal analysis of the dizinc(II) complex with p-nitrophenyl phosphate showed that the phosphate dianion binds as a bridging ligand to the two zinc(II) ions.