Lu, Ye; Liu, Dong; Lin, Yue-Jian; Li, Zhen-Hua; Hahn, F. Ekkehardt; Jin, Guo-Xin published an article in 2021. The article was titled 《An “”All-in-One”” Synthetic Strategy for Linear Metalla[4]Catenanes》, and you may find the article in Journal of the American Chemical Society.SDS of cas: 2510-22-7 The information in the text is summarized as follows:
One fascinating and challenging synthetic target in the field of mech. interlocked mols. is the family of linear [4]catenanes, which are topol. identical to the logo of automobile maker Audi. Herein, we report an “”all-in-one”” synthetic strategy for the synthesis of linear metalla[n]catenanes (n = 2-4) by the coordination-driven self-assembly of Cp*Rh-based (Cp* = η5-pentamethylcyclopentadienyl) organometallic rectangle π-donors and tetracationic organic cyclophane π-acceptors. We selected the pyrenyl group as the π-donor unit, leading to homogeneous metalla[2]catenanes and cyclic metalla[3]catenanes via π-stacking interactions. By taking advantage of the strong electrostatic interactions between π-donor units and π-acceptor units, a heterogeneous metalla[2]catenanes and linear metalla[3]catenanes, resp., could be obtained by the simple stirring of homogeneous metalla[2]catenanes with a suitable tetracationic cyclophane. On this basis, this “”all-in-one”” synthetic strategy was further used to realize a quant. one-step synthesis of a linear metalla[4]catenanes via the self-assembly of cyclic metalla[3]catenanes and tetracationic cyclophanes. All heterogeneous metalla[n]catenanes (n = 2-4) were fully characterized by single-crystal X-ray anal., NMR spectroscopy and electrospray ionization mass spectrometry. In the experiment, the researchers used many compounds, for example, 4-Ethynylpyridine(cas: 2510-22-7SDS of cas: 2510-22-7)
4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.SDS of cas: 2510-22-7