Synthesis, optical and supramolecular properties of curved nanographenes

Place: conference room, IMDEA Nanociencia.

Abstract:

The bottom-up synthesis of well-defined polycyclic conjugated hydrocarbons (PCHs) is still a scientific challenge, being key for the development of material science. The enormous research effort dedicated to carbon-based materials have leaded to a huge bloom of novel architectures such as nanobelts or hoops, chiral nanostructures, bowl- and saddle-shapes, doped or open-shell analogues. Their unique curved structures open novel avenues for applications due to the optical and electronical properties that might arise. Within this context, we have been focused on the synthesis and evaluation of properties of saddle-helical hybrid nanographenes. Herein, our recent advances in the inclusion of heptagon-containing nanographenes as key distorted motifs in other curved PCHs will be discussed. Particularly, the inclusion of heptagons on hexa-peri-hexabenzocoronene-based helicenes (superhelicenes) leads to highly soluble analogues with promising chiroptical properties. The saddle curvature can be also introduced in nanohoops offering interesting supramolecular behaviour. In this sense, polystyrene microbeads loaded with curved nanographenes generate functional light emitting microcomposite acting as optical microresonators.

Short biography: 

Araceli G. Campaña completed a degree in Chemistry at the Universidad de Granada. She stayed for a PhD with Prof. Juan M. Cuerva and Prof. J. Enrique Oltra (2004-2008) working on radical chemistry mediated by Ti(III) and its combination with other transition metals and with water. In 2009, she moved to Madrid to join the group of Prof. Diego J. Cárdenas at the Universidad Autónoma de Madrid where she carried out Density Functional Theory (DFT) -based calculations to explain synthetic mechanisms and experimental findings on organometallic reactions. In October 2009 she joined the group of Prof. David A. Leigh at the University of Edinburgh, to work on the design, synthesis and operation of new molecular machines involving dynamic covalent chemistry. In 2012, she was appointed as “Juan de la Cierva” postdoctoral researcher at the Universidad de Granada in the group of "Organic Chemistry and Molecular Electronics, FQM367". In January 2015 she was appointed as “Ramón y Cajal” researcher at the Department of Organic Chemistry of the University of Granada. In 2016 she received the ERC-Starting Grant awarded by the European Research Council to carry out the project “Design, synthesis, study and applications of distorted nanographenes. In 2019 she was promoted to Assistant Professor at the Department of Organic Chemistry of the University of Granada.

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