ELECTROSPRAY ION BEAM DEPOSITION and SINGLE MOLECULE IMAGING GROUP (RAUSCHENBACH GROUP)
SEMINAR
WEDNESDAY, 30 NOVEMBER 2022, 1400 (2pm), PTCL LECTURE HALL
On-surface Synthesis of Atomically Precise Polymers and Real Space Imaging of the Sigma Hole by means of Scanning Probe Microscopy
Benjamin Mallada Faes
Nanomaterial Chemistry, Palacký University, Olmouc, Czech Republic
In the last years, scanning probe microscopy has enabled the on-site study of the physical and chemical properties of single molecules on the atomic level. In the interface between a well-defined crystal and the vacuum, the reduction of symmetry of the crystal opens a playground for the exploration of exotic and novel properties of molecules.
The two-dimensional confinement of molecules introduces novel pathways for atomically precise on- surface polymerizations [1], planarization by kinetic control of strained molecules [2], the study of electronic and magnetic properties of polymers [3], and the exploration of non-covalent interactions [4].
In this talk, I will introduce the role of the surface for driving chemical reactions, otherwise impossible or had to perform in wet chemistry and the capabilities of non- contact atomic force microscopy (nc-AFM) to characterize, in the atomic scale, non- covalent interactions such as the real-space visualization of the sigma hole [4].
[1] B. Cirera, A. Sánchez-Grande, B. de la Torre, J. Santos, S. Edalatmanesh, E. Rodríguez-Sánchez, K. Lauwaet, B. Mallada, R. Zbořil, R. Miranda, O. Gröning, P. Jelínek, N. Martín, D. Ecija: Tailoring topological order and π-conjugation to engineer quasi- metallic polymers. Nat. Nanotechnol. 15 (2020), pp. 437–443. [2] B. Mallada, B. de la Torre, J. I. Mendieta-Moreno, D. Nachtigallová, A. Matěj, M. Matoušek, P. Mutombo, J. Brabec, L. Veis, T. Cadart, M. Kotora, P. Jelínek: On-Surface Strain-Driven Synthesis of Nonalternant Non-Benzenoid Aromatic Compounds Containing Four- to Eight-Membered Rings. J. Am. Chem. Soc. 143 (2021), pp. 14694–14702. [3] B. Mallada, P. Błoński, R. Langer, P. Jelínek, M. Otyepka, B. de la Torre: On-Surface Synthesis of One-Dimensional Coordination Polymers with Tailored Magnetic Anisotropy. ACS Appl. Mater. Interfaces 13 (2021), pp. 32393–32401. [4] B. Mallada, A. Gallardo, M. Lamanec, B. de la Torre, V. Špirko, P. Hobza, P. Jelinek: Real-space imaging of anisotropic charge of sigma-hole by means of Kelvin probe force microscopy. Science 374 (2021), pp. 863–867.
