The flexible linear multidentate ligands 1,5-bis(8-quinolylsulfanyl)-3-oxapentane (OESQ) and 1,8-bis(8-quinolylsulfanyl)-3,6-dioxaoctane (ODSQ) reacted with silver(I) perchlorate affording the simple mononuclear complexes [Ag(OESQ)]ClO41 and [Ag(ODSQ)]ClO42, respectively. However, with silver(I) nitrate, novel metallosupramolecular complexes [Ag4(ODSQ)2(η1-NO3)2(η2-NO3)2] 3 and [Ag4(OESQ)(ODSQ)(η1-NO3)2(η2-NO3)2]·H2O 4 were obtained, in which the co-ordination motifs [Ag(OESQ)]+ and [Ag(ODSQ)]+ are spontaneously self-assembled by sulfur-bridged silver(I) ions into tetrametallotricyclic molecules containing the same or mixed building blocks. All four complexes have been characterized by elemental analyses, IR and 1H NMR spectroscopy, and single crystal X-ray diffraction methods. The possible self-assembly process has been discussed with the aid of electrospray mass spectrometry.
柔性线性多叉
配体 1,5-双(8-
喹啉硫酰)-3-氧杂
戊烷(OESQ)和 1,8-双(8-
喹啉硫酰)-3,6-二氧杂
辛烷(ODSQ)与
高氯酸银(I)反应,分别生成简单的单核络合物 [Ag(OESQ)]ClO41 和 [Ag(ODSQ)]ClO42。然而,在
硝酸银(I)的作用下,得到了新型
金属超分子配合物[Ag4(ODSQ)2(η1-
NO3)2(η2- )2] 3 和[Ag4(OESQ)(ODSQ)(η1- )2(η2- )2]-
H2O 4、其中[Ag(OESQ)]+ 和[Ag(ODSQ)]+ 配位基团是由
硫桥
银(I)离子自发地自组装到含有相同或混合构筑基块的四元
三环分子中的。这四种复合物都通过元素分析、红外和 1H NMR 光谱以及单晶 X 射线衍射方法进行了表征。借助电喷雾质谱法讨论了可能的自组装过程。