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O: Fachverband Oberflächenphysik
O 84: Gerhard Ertl Young Investigator Award Competition
O 84.5: Vortrag
Donnerstag, 20. März 2025, 12:30–13:00, H24
band engineering via metal substitution in porphyrin-graphene hybrid systems — •feifei xiang1, yanwei gu2, amogh kinikar1, nicolò bassi1, andres ortega-guerrero1, carlo a. pignedoli1, giovanni bottari3, tomás torres3, klaus müllen2, pascal ruffieux1, and roman fasel1 — 1Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland — 2Synthetic Chemistry, Max Planck Institute for Polymer Research, 55128 Mainz, Germany — 3Departamento de Química Orgánica Universidad Autónoma de Madrid Madrid 28049, Spain
Graphene and its derivatives serve as a versatile platform for finely tuning physical properties across a wide range. Expanding the potential applications of graphene to optoelectronics and gas sensing has driven the development of new materials including hybrid molecular systems that integrate porphyrins with graphene. On-surface synthesis provides a viable approach to achieving such well-defined hybrid structures. Here, we present the synthesis and characterization of porphyrin-graphene hybrid systems (chemrxiv-2024-z9rgh), in which the porphyrin units feature varying metal substitutions. The strong electronic coupling between porphyrin and tailored graphene nanostructures enables the metal center to play a significant role in modulating the band structure through charge doping, and to generate new hybrid states arising from d-π interactions, which allows long range spin coupling between magnetic metal centers. Such robust hybrid molecular systems hold promise in applications in p-n heterojunctions and paves the way towards achieving coherent control of spin chains.
Keywords: porphyrin; graphene; spin; band structure; spin orbit coupling