Synthesis of new asparagine-based glycopeptides for future scanning tunneling microscopy investigations

• Laura Sršan and
• Thomas Ziegler

Beilstein J. Org. Chem. 2020, 16, 888–894, doi:10.3762/bjoc.16.80

• the aromatic backbone and known interaction of the compounds with Cu(100) and Au(111), ʟ-Phe and ʟ-Trp should be distinguishable in STM from the remaining building blocks [16][18][21]. ʟ-Ala seemed to be an ideal supplement for the synthesis of these new glycoconjugates since there was no additional

A systematic review on silica-, carbon-, and magnetic materials-supported copper species as efficient heterogeneous nanocatalysts in “click” reactions

• Pezhman Shiri and
• Jasem Aboonajmi

Beilstein J. Org. Chem. 2020, 16, 551–586, doi:10.3762/bjoc.16.52

• . This solid material was washed with MeOH and dried. The resulting GO/intrinsically microporous polymer (Pim) material and CuSO4 were added into water and heated at 50 °C overnight to afford the material GO/Pim/Cu (100, Scheme 22). The powder was collected by filtration and washed by water/methanol. The

Molecular ordering at electrified interfaces: Template and potential effects

• Thanh Hai Phan and
• Klaus Wandelt

Beilstein J. Org. Chem. 2014, 10, 2243–2254, doi:10.3762/bjoc.10.233

• mechanism. Comparison of both observed structures with those found earlier at different electrode potentials on a c(2 × 2)Cl-precovered Cu(100) electrode surface enables a clear assessment of the relative importance of adsorbate–substrate and adsorbate–adsorbate interactions, i.e., template vs self-assembly

• earlier for the same molecules on a chloride-modified Cu(100) electrode [5][6][7], will then enable us to arrive at a generalized picture of the influence of template and potential effects on the structure formation of these molecular ions on both chloride modified copper single crystal surfaces of

• the uncharged viologen species DBV0, respectively. The first investigations on the surface redox chemistry as well as the self-assembly of DBV-species on a chloride modified Cu(100) surface, were presented by Safarowsky et al. and Pham et al. [5][6][7]. In the present paper we will describe for the

Lateral ordering of PTCDA on the clean and the oxygen pre-covered Cu(100) surface investigated by scanning tunneling microscopy and low energy electron diffraction

• Stefan Gärtner,
• Benjamin Fiedler,
• Oliver Bauer,
• Antonela Marele and
• Moritz M. Sokolowski

Beilstein J. Org. Chem. 2014, 10, 2055–2064, doi:10.3762/bjoc.10.213

• , 76131 Karlsruhe, Germany Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049, Madrid, Spain 10.3762/bjoc.10.213 Abstract We have investigated the adsorption of perylene-3,4,9,10-tetracarboxylic acid dianhydride (PTCDA) on the clean and on the oxygen pre-covered Cu(100

• ) surface [referred to as (√2 × 2√2)R45° – 2O/Cu(100)] by scanning tunneling microscopy (STM) and low energy electron diffraction (LEED). Our results confirm the (4√2 × 5√2)R45° superstructure of PTCDA/Cu(100) reported by A. Schmidt et al. [J. Phys. Chem. 1995, 99,11770–11779]. However, contrary to Schmidt

• significant density of nucleation defects is found pointing to a strong interaction of PTCDA with Cu(100). Quite differently, after preadsorption of oxygen and formation of the (√2 × 2√2)R45° – 2O/Cu(100) superstructure on Cu(100), PTCDA forms an incommensurate monolayer with a structure that corresponds well

Theoretical study of the adsorption of benzene on coinage metals

• Werner Reckien,
• Melanie Eggers and
• Thomas Bredow

Beilstein J. Org. Chem. 2014, 10, 1775–1784, doi:10.3762/bjoc.10.185

• molecule. The binding between benzene and copper is the largest of all investigated surfaces. Eads is calculated to Eads = −117 kJ/mol for Cu(110), Eads = −114 kJ/mol for Cu(100) and Eads = −97 kJ/mol for Cu(111). For gold the adsorption energies are Eads = −85 kJ/mol for the Au(110), Eads = −87 kJ/mol for

• independent from the surface type. The sole exception is the Cu(110) surface the adsorption energy of which is about −20 kJ/mol smaller than Eads on Cu(100) and Cu(110). For all other systems we find that the adsorption energies on the selected surface planes are within the range of 3 kJ/mol. The results are

• (111) surfaces. By comparison of the metals we observe, that the adsorption distances are shortest for the copper surfaces and longest for the silver surfaces. The adsorption distances are d1 = 2.86 Å for Cu(111), d1 = 2.45 Å for Cu(100), d1 = 2.35 Å for Cu(110), d1 = 3.17 Å for Ag(111), d1 = 3.00 Å