我们报道了一种基于 3,6,10,13-tetraaza-1,8(2,6)-dipyridinacyclotetradecaphane 平台的大环配体 (H 3 L 6 ),该平台包含三个乙酸酯侧臂和连接到第四个氮原子的苄基的大周期。 Y L 6和Tb L 6配合物的X射线结构揭示了配体通过大环的六个氮原子和羧酸根侧链的三个氧原子与金属离子的九个配位。核磁共振波谱研究( 1 H、 13 C 和89 Y)和 DFT 计算相结合表明,固态 Y L 6配合物的结构在水溶液中得以保持。对Eu L 6和Tb L 6配合物的发射光谱的详细研究表明,以Ln 3+为中心的发射,量子产率分别为7.0%和60%。发射寿命测量表明,配体可以很好地保护金属离子免受周围水分子的影响,从而防止水分子的配位。 Y L 6配合物对于配合物解离具有显着的惰性,在 1 M HCl 中的寿命为 1.7 小时。另一方面,复合物形成速度很快(pH
我们报道了一种基于 3,6,10,13-tetraaza-1,8(2,6)-dipyridinacyclotetradecaphane 平台的大环配体 (H 3 L 6 ),该平台包含三个乙酸酯侧臂和连接到第四个氮原子的苄基的大周期。 Y L 6和Tb L 6配合物的X射线结构揭示了配体通过大环的六个氮原子和羧酸根侧链的三个氧原子与金属离子的九个配位。核磁共振波谱研究( 1 H、 13 C 和89 Y)和 DFT 计算相结合表明,固态 Y L 6配合物的结构在水溶液中得以保持。对Eu L 6和Tb L 6配合物的发射光谱的详细研究表明,以Ln 3+为中心的发射,量子产率分别为7.0%和60%。发射寿命测量表明,配体可以很好地保护金属离子免受周围水分子的影响,从而防止水分子的配位。 Y L 6配合物对于配合物解离具有显着的惰性,在 1 M HCl 中的寿命为 1.7 小时。另一方面,复合物形成速度很快(pH
Hexaaza and octaaza macrocycles with 2-hydroxy-3,5-dimethylbenzyl pendant arms
作者:S. W. Annie Bligh、Nick Choi、Evagoras G. Evagorou、Mary McPartlin
DOI:10.1039/a704835a
日期:——
New 18-membered hexaaza (3 and 4) and 24-membered octaaza (7 and 8) macrocycles with 2-hydroxy-3,5-dimethylbenzyl pendant arms have been prepared via a Mannich type reaction of the corresponding macrocycles [(1 and 2) and (5 and 6) respectively] with 2,4-dimethylphenol in the presence of methanal in a methanolic solution. X-Ray structure analysis shows the tetramethyl substituted hexaaza macrocycle with 2-hydroxy-3,5-dimethylbenzyl pendant arms 4 and its precursor [H42]4+ both have centrosymmetric molecules with step conformation. Differences in conformation arise from hydrogen bonding interactions; in [H42]4+ bonding between amino nitrogen atoms and water molecules appears to tie the backbone chain of the macrocycle together, and in 4 strong intramolecular hydrogen bonding with each 2-hydroxybenzylamino unit dictates the orientation of the pendant arms.
Ditopic hexaazamacrocycles containing pyridine: synthesis, protonation and complexation studies
作者:Feng Li、Rita Delgado、Judite Costa、Michael G. B. Drew、Vítor Félix
DOI:10.1039/b415718d
日期:——
[Cu2([20]py2N4)(H2O)4][Cu(H2O)6](SO4)3 x 3H2O and [Cu(2)([20]py(2)N4)(CH3CN)4][Ni([20]py2N4)]2(ClO4)8 x H2O, which are composed of homodinuclear [Cu2([20]py2N4])(H2O)4]4+ and [Cu2([20]py2N4])(CH3CN))4]4+, and mononuclear species, [Cu(H2O)6]2+ and [Ni([20]py2N4)]2+, respectively, assembled by an extensive network of hydrogen bonds, are also reported. In both homodinuclear complexes the copper centres
A hexaaza macrocyclic ligand containing acetohydrazide pendants for Ln(iii) complexation in aqueous solution. Solid-state and solution structures and DFT calculations
[Ln(L)](3+) complexes have been characterised by means of density-functional theory (DFT) calculations (B3LYP model). The structures obtained from these theoretical calculations are in very good agreement with the experimental solution structures, as obtained from paramagnetic NMR measurements on the Ce(iii), Pr(III), Nd(III) and Eu(III) complexes. The complexes adopt in aqueoussolution a D(2) structure
Synthesis and crystal structure of a novel hexaaza macrocyclic ligand with 2-hydroxy-3,5-dimethylbenzyl pendant arms and its gadolinium(III) complex
作者:S. W. Annie Bligh、Nick Choi、W. Jon Cummins、Evagoras G. Evagorou、J. Duncan Kelly、Mary McPartlin
DOI:10.1039/dt9930003829
日期:——
six nitrogen donor atoms adopt a chair conformation in the solid state, and the gadolinium(III) complex of monodeprotonated H4L1, [Gd(H3L1)(NO3)]NO3.3H2O, has a nine-co-ordinate gadolinium bound to one phenolic oxygen atom, two oxygen atoms from one nitrate and six nitrogen donors from the macrocyclic ligand.
合成了在仲胺氮上被2-羟基-3,5-二甲基苄基取代的两个新的六氮杂大环H 4 L 1和H 4 L 2;H 4 L 2的晶体结构表明,六个氮供体原子在固态下均具有椅子构象,且单去质子化H 4 L 1,[Gd(H 3 L 1)(NO 3)的ado (III)配合物] NO 3 .3H 2O,具有结合至一个酚氧原子的九坐标nine,来自一个硝酸盐的两个氧原子和来自大环配体的六个氮供体。
Cyclic polyamines
申请人:Johnson Matthey Public Limted Company
公开号:US05698546A1
公开(公告)日:1997-12-16
Linked polyamine cyclic compounds of general formula V--R--A--R'--W where V and W are independently cyclic polyamine moieties having from 9 to 32 ring members and 3 to 8 amine nitrogens and having either one or more aromatic rings fused thereto or a heteroatom other than nitrogen incorporated in the ring, A is an aliphatic or aromatic moiety and R and R' are each a linking chain, possess improved partition coefficients at biologically relevant pH compared to known compounds, and possess high anti-HIV activity.