Chiral structures of 6,12-dibromochrysene on Au(111) and Cu(111) surfaces

Chirality variation from self-assembly on Ullmann coupling for the DBCh adsorbate on Au(111) and Ag(111)

“…1a , which in principle is accommodated on the fcc sites of the Au(111) reconstruction and is analogous to the previous observation of DBCh on Au(111). 33 Sequential deposition of 0.3 ML DBCh in total ( Fig. 1b ) results in the extension of the hexagonal domain along the high-symmetry direction of the substrate but still localized inside the fcc area.…”

“…8b and c. First, the cyclodehydrogenation is induced after kicking off the coordinated Ag atom, and the C–C covalent dimer is thus fabricated by covalently connecting chrysene units, 32,33 as highlighted with the molecular model in Fig. 8b.…”

“…Although a previous report has demonstrated the chiral adsorption of DBCh and the chiral arrangement of polymers on Au(111) and Cu(111), 32 the process of chirality variation and preservation during reactions is still unclear due to the limited resolution of images. Recently, Cai et al reported the formation of a chiral domain on Au(111) and one-dimensional metal–ligand chiral chains on Cu(111) with high-resolution scanning tunnelling microscopy (STM) and non-contact atomic force microscopy, 33,34 and investigated the related electronic structures. However, the issue of chirality variation and structural variability of organometallic (OM) intermediates and polymers remains vague.…”

Metal-assisted core–shell plasmonic nanoparticles for small molecule biothiol analysis and enantioselective recognition

“…For chiral enantiomers, most amino acid side chains will be aligned along the Cu center direction, and for adsorbed chiral enantiomers, Cu 2+ tends to be adsorbed in a linear arrangement, while adsorbed atoms are adsorbed on corresponding lattice sites, thus making it necessary to study the differences in bond lengths of the enantiomers. 47 The bond lengths of the Cu center with l -Cys are 1.880 Å, 1.856 Å, 1.892 Å and 1.85 Å for “Cu–N, Cu–O, Cu–O and Cu–N”, respectively. The bond lengths of the Cu center with d -Cys are 1.8677 Å, 1.872 Å, 1.903 Å and 1.846 Å for “Cu–N, Cu–O, Cu–O and Cu–N”, respectively.…”

From Short‐ to Long‐Range Chiral Recognition on Surfaces: Chiral Assembly and Synthesis

“…A great number of chiral assemblies have been studied on metal surfaces, including 0D chiral clusters, [24][25][26][27] 1D chiral chains, stripes or lines, filaments, wires [28][29][30][31][32][33][34] and 2D chiral islands, lamellas structures and honeycomb or more complex nontrivial architectures (chiral Kagome networks, quasicrystals, Sierpiński triangle fractals and semi-regular Archimedean tilings) that may possess intriguing physical and chemical properties. Most of these chiral nanostructures are achieved through shortrange chiral recognition induced by non-covalent intermolecular interactions, such as hydrogen bonding, [24,28,30,31,[34][35][36][37][38][39][40][41][42] halogen bonding, [33,[43][44][45][46] van der Waals (vdW) forces, [47] dipoledipole interactions, [48] metal-organic coordination [33,[49][50][51] or cooperative interactions of two or more sorts of intermolecular forces. [27,29,34,40,[52][53][54][55] In addition, the competition between molecule-molecule an...…”