Influence of CH···N interaction in self-assembly of oligo(isoquinolyne-ethynylyne) molecule with distinct conformational states was written by Nuermaimaiti, Ajiguli;Ning, Yanxiao;Cramer, Jacob L.;Svane, Katrine L.;Hammer, Bjoerk;Gothelf, Kurt V.;Linderoth, Trolle R.. And the article was included in Langmuir in 2017.SDS of cas: 90721-35-0 This article mentions the following:
Mol. conformational flexibility can play an important role in supramol. self-assembly on surfaces, affecting not least chiral mol. assemblies. To explicitly and systematically investigate the role of mol. conformational flexibility in surface self-assembly, we synthesized a three-bit conformational switch where each of three switching units on the mols. can assume one of two distinct binary positions on the surface. The mols. are designed to promote C-H···N type hydrogen bonds between the switching units. While supramol. self-assembly based on strong hydrogen-bonding interactions has been widely explored, less is known about the role of such weaker directional interactions for surface self-assembly. The synthesized mols. consist of three nitrogen-containing isoquinoline (IQ) bits connected by ethynylene spokes and terminated by tert-Bu (tBu) groups. Using high-resolution scanning tunneling microscopy, we investigate the self-assembly of the IQ-tBu mols. on a Au(111) surface under ultrahigh-vacuum conditions. The mols. form extended domains of brick-wall structure where the mol. backbones are packed regularly but without selection of specific mol. conformations. However, statistical anal. of the extended network demonstrates alignment/correlation for the orientations of the switching units indicating specific interactions. The primary interaction motifs in the structure are quantified from DFT calculations, showing that the brick-wall structure is indeed stabilized by two types of weak C-H···N bonds, involving either aromatic hydrogens on the IQ groups or nonaromatic hydrogens on the tBu groups. Anal. of the C-H···N interactions in the brick-wall structure explains the observed distribution and alignment of mol. conformations as well as the overall organization of the mol. surface structures. In the experiment, the researchers used many compounds, for example, 5-Bromoisoquinolin-8-amine (cas: 90721-35-0SDS of cas: 90721-35-0).
5-Bromoisoquinolin-8-amine (cas: 90721-35-0) belongs to isoquinoline derivatives. Isoquinoline is a structural isomer of quinoline, which have antiseptic, antipyretic and anti-cyclic properties, and can be used as antimalarial drugs and for the preparation of other antimalarial medicine. The Pomeranz–Fritsch reaction provides a method for the preparation of isoquinoline. This reaction uses a benzaldehyde and aminoacetoaldehyde diethyl acetal, which in an acid medium react to form isoquinoline.SDS of cas: 90721-35-0
Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem