RT Journal Article T1 Studying an antiaromatic polycyclic hydrocarbon adsorbed on different surfaces A1 Mjazik, Zsolt A1 Pavliček, Niko A1 Vilas-Varela, Manuel A1 Pérez Meirás, María Dolores A1 Moll, Nikolaj A1 Guitián Rivera, Enrique A1 Meyer, Gehrard A1 Peña Gil, Diego A1 Gross, Leo K1 Electronic properties and materials K1 Scanning probe microscopy K1 Structure elucidation AB Antiaromatic and open-shell molecules are attractive because of their distinct electronic and magnetic behaviour. However, their increased reactivity creates a challenge for probing their properties. Here, we describe the on-surface and in-solution generation and characterisation of a highly reactive antiaromatic molecule: indeno[1,2-b]fluorene (IF). In solution, we generated IF by KI-induced dehalogenation of a dibromo-substituted precursor molecule and found that IF survives for minutes at ambient conditions. Using atom manipulation at low temperatures we generated IF on Cu(111) and on bilayer NaCl. On these surfaces, we characterised IF by bond-order analysis using non-contact atomic force microscopy with CO-functionalised tips and by orbital imaging using scanning tunnelling microscopy. We found that the closed-shell configuration and antiaromatic character predicted for gas-phase IF are preserved on the NaCl film. On Cu(111), we observed significant bond-order reorganisation within the s-indacene moiety because of chemisorption, highlighting the importance of molecule surface interactions on the π-electron distribution PB Springer Nature SN 2041-1723 YR 2018 FD 2018-03-22 LK http://hdl.handle.net/10347/16779 UL http://hdl.handle.net/10347/16779 LA eng NO Majzik, Z., Pavliček, N., Vilas-Varela, M., Pérez, D., Moll, N., & Guitián, E. et al. (2018). Studying an antiaromatic polycyclic hydrocarbon adsorbed on different surfaces. Nature Communications, 9(1). http://dx.doi.org/10.1038/s41467-018-03368-9 NO We acknowledge financial support from the European Research Council Advanced Grant CEMAS (291194), the European Union project PAMS (610446) and the ERC Consolidator Grant AMSEL (682144) programs, the Agencia Estatal de Investigación (MAT2016-78293-C6-3-R and CTQ2016-78157-R), the Xunta de Galicia (Centro singular de investigación de Galicia accreditation 2016-2019, ED431G/09) and the European Regional Development Fund (ERDF) DS Minerva RD 22 abr 2026