Synthesis and luminiscence properties of europium(III) and terbium(III) complexes with polyacid chelates derived from 2,6-bis(N-pyrazolyl)pyridine
Synthesis and luminiscence properties of europium(III) and terbium(III) complexes with polyacid chelates derived from 2,6-bis(N-pyrazolyl)pyridine
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DOI：
10.1039/p29930001099
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
M. Remuiñán;Herminia Román;M. Alonso;J. Rodríguez-Ubis
中科院分区：
文献类型：
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作者：
M. Remuiñán;Herminia Román;M. Alonso;J. Rodríguez-Ubis
描述了N，N，N '，N'-[2，6-双（3-氨甲基-1-吡唑基）吡啶]-四（乙酸）（6）（具有额外螯合亚氨基二乙酸基团的三联吡啶类似物）的简短而有效的合成。化合物6与EuIII和TbIII在水中形成稳定的络合物，其相对发光产率、激发最大值和发射衰减寿命已被测量。还确定了铕配合物第一配位层中的水分子数。从EuIII和TbIII配合物的6和母体三杂环二酸2，6-双（3-羧基-1-吡唑基）吡啶的数据比较表明，亚氨基二乙酸亚基提供额外的稳定的配合物，是必不可少的，以保护金属免受水环境。
A short and efficient synthesis of N, N, N′, N′-[2,6-bis(3-aminomethyl-1-pyrazolyl)pyridine]-tetrakis(acetic acid)(6), an analogue of terpyridine with additional chelating iminodiacetic groups, is described. Compound 6 forms stable complexes with EuIII and TbIII in water whose relative luminescence yields, excitation maxima and emission decay lifetimes have been measured. The number of water molecules in the first coordination sphere of the europium complex have also been determined. Comparison of data from the EuIII and TbIII complexes of 6 and of the parent trisheterocycle diacid 2,6-bis(3-carboxy-1-pyrazolyl)pyridine shows that the iminodiacetic subunits give extra stabilization to the complexes and are essential to protect the metal from the water environment.