Self‐Assembly of Pseudo[
<i>1</i>
]rotaxanes by Palladium(II)/Platinum(II)‐Directed Integrative Social Self‐Sorting: Is the Metal Required?
作者:Tamara Rama、Arturo Blanco‐Gómez、Carlos Peinador、Marcos D. García
DOI:10.1002/cplu.202000739
日期:2020.12
spectrometry, arise as the main products of the self‐assembly in aqueous media by using palladium(II)/platinum(II) metal centers as the guiding force. Crucially, we have also found that by improving the π‐donor/acceptor properties of the matching pairs of ligands (L4 and L5), the integrative self‐sorting processes prevail even in the absence of metallic ions to afford the heterodimeric species with an
伪[ 1 ]轮烷的多组分超分子合成方面的新结果,是通过设计具有互补的π-给体/受体特征的结构配对的基于N-单烷基-4,4'-Bipyridinium / 2,7-二氮杂re的配体对实现的,并打算通过集成的自选过程自组装为目标超分子。在所有研究案例中,发现以NMR光谱和MS光谱为特征的预想物种是通过使用钯(II)/铂(II)金属中心作为水介质中自组装的主要产物而出现的。制导力。至关重要的是,我们还发现通过改善π配体的配对对(L 4和L 5)具有给体/受体特性,即使在没有金属离子的情况下,整体自分选过程仍然占优势,从而提供缔合常数为756±43 M -1的异二聚体。
Self-assembly of a novel series of hetero-duplexes driven by donor–acceptor interaction
The self-assembly of a novel series of donor-acceptor interaction-driven artificial hetero-duplexes in organic media has been described. Four linear compounds 1a-1d, bearing two to five electron rich 1,5-dioxynaphthalene units connected by the tetra(ethylene glycol) linker, respectively, have been prepared and used as donors, while eight compounds 2a-2d, 13-16, bearing one to four electron deficient pyromellitic diimide, 1,4,5,8-naphthalene-tetracarboxydiimide, or perylene-3,4,9,10-tetracarboxydiimide units, respectively, have been used as acceptors. The structure of the hetero-duplexes has been characterized by the H-1 NMR, UV-vis spectroscopy and vapor pressure osmometry. It is revealed that the binding stability of the duplexes vary greatly, depending on the length and structure of the monomers and also the solvent, and hetero-duplex 1d(.)2d displays a maximum association constant of ca. 1.0 x 10(4) m(-1) in chloroform. (c) 2005 Elsevier Ltd. All rights reserved.