Diradical organic one-dimensional polymers synthesized on a metallic surface

0539772 - FZÚ 2021 RIV DE eng J - Journal Article
Sánchez-Grande, A. - Urgel, J. I. - Cahlík, Aleš - Santos, J. - Edalatmanesh, Shayan - Rodriguez-Sanchez, E. - Lauwaet, K. - Mutombo, Pingo - Nachtigallová, Dana - Nieman, R. - Lischka, H. - De La Torre Cerdeño, Bruno - Miranda, R. - Groening, O. - Martín, N. - Jelínek, Pavel - Écija, D.
Diradical organic one-dimensional polymers synthesized on a metallic surface.
Angewandte Chemie - International Edition. Roč. 59, č. 40 (2020), s. 17594-17599. ISSN 1433-7851. E-ISSN 1521-3773
R&D Projects: GA MŠMT LM2018110
Grant - others:AV ČR(CZ) AP1601
Program: Akademická prémie - Praemium Academiae
Institutional support: RVO:68378271 ; RVO:61388963
Keywords : biradical * DFT * nc-AFM * 1D chains * on surface chemistry
OECD category: Physical chemistry; Physical chemistry (UOCHB-X)
Impact factor: 15.336, year: 2020
Method of publishing: Open access

Here, we report on the synthesis and characterization of atomically precise one‐dimensional diradical peripentacene polymers on a Au(111) surface. By means of high‐resolution scanning probe microscopy complemented by theoretical simulations, we provide an evidence of their magnetic properties, which arise from the presence of two unpaired spins at their termini. In addition, we probe a transition of their magnetic properties related to the length of the polymer. Peripentacene dimers exhibit an antiferromagnetic (S = 0) singlet ground state. They are characterized by singlet‐triplet spin‐flip inelastic excitations with an effective exchange coupling (J eff ) of 2.5 meV, whereas trimers and longer peripentacene polymers reveal a paramagnetic nature and feature Kondo fingerprints at each terminus due to the unpaired spin.
Permanent Link: http://hdl.handle.net/11104/0317471