Ruthenium(II) Complexes of Aryl Triazole Foldamers as Receptors for Anions
Ruthenium(II) Complexes of Aryl Triazole Foldamers as Receptors for Anions
复制标题
作为阴离子受体的芳基三唑折叠体的钌(II)配合物
DOI：
10.1002/chem.201504910
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发表时间：
2016
影响因子：
4.3
通讯作者：
Jiang Hua
中科院分区：
文献类型：
--
作者：
Wang Ying;Zhao Wei;Bie Fusheng;Wu Le;Li Xichen;Jiang Hua
合成了钌（II）低聚（联吡啶-苯基三唑）配合物作为阴离子受体。通过金属-配体相互作用部分预组织的受体可以折叠成螺旋构象，在丙酮或竞争性氢键介质（如丙酮和DMSO中5%的水）的内腔中结合氯离子、溴离子、碘离子或硝酸盐阴离子。短寡聚物可以在丙酮中以高亲和力夹住所研究的阴离子。在丙酮中加入5%的水，由于水的结合竞争导致结合强度整体下降，但不改变基本结合模式。高度竞争的氢键溶剂DMSO使受体与阴离子的相互作用变得更弱。然而，在DMSO中，短受体1仍然能够以1:1的化学计量率以中等亲和度结合卤化物阴离子，而较长的寡聚体2形成双链螺旋，其中阴离子包裹在其中，迄今为止研究的所有阴离子。
Ruthenium(II) complexes of oligo(bipyridine–phenyl triazole)s were synthesized as receptors for anions. The receptors, which are partially preorganized through metal–ligand interactions, can fold into a helical conformation to bind chloride, bromide, iodide, or nitrate anions in their inner cavities in acetone or competitive H‐bonding media such as 5 % water in acetone and DMSO. The short oligomer1can sandwich the studied anions with high affinity in acetone. Addition of 5 % water to acetone results in overall decreases in the binding strength due to the binding competition from water, but does not change the basic binding mode. The highly competitive H‐bonding solvent DMSO causes the receptor–anion interactions to become even weaker. However, in DMSO, the short receptor1is still able to bind the halide anions with moderate affinities in a 1:1 stoichiometry, whereas the longer oligomer2forms double‐strand helices with an anion wrapped inside for all anions investigated so far.