Tue, 07 Nov 2023
Seminar Series

Dr. Tomas Torres

Universidad Autónoma de Madrid, Spain

The unique features and promises of porphyrinoids as advanced materials and nanostructures.

Tuesday, November 07, 2023
SSB 7172 @ 10:30 a.m.

Host: Dr. Daniel Leznoff



On-surface synthesis offers a versatile approach to prepare novel carbon-based nanostructures that cannot be obtained by conventional solution chemistry. Graphene nanoribbons (GNRs) have potential for a variety of applications. A key issue for their application in molecular electronics is in the fine-tuning of their electronic properties through structural modifications, such as heteroatom doping or the incorporation of non-benzenoid rings [1]. Porphyrinoids are ideal for this purpose. Phthalocyanines [2] are aromatic molecules with 18 pi-electrons and a strong absorption in the visible range (light-harvesting, high extinction coefficients, broad coverage of solar spectrum), HOMO/LUMO levels adjusted to the electrodes (rich redox chemistry, photoinduced electron transfer), good processability (solution-processing or vacuum-technology), ability for packing in solid state (control of morphology, self-assembling properties), and excellent charge transport properties. They have been linked to different carbon nanostructures [2]. Subphthalocyanines (SubPcs) [3] are well-known cone-shaped chromophores consisting of three 1,3-diiminoisoindole units assembled around a boron atom. As a result of their 14 pi-electron aromatic core and their tetrahedral geometry, SubPcs exhibit outstanding physical and optoelectronic properties (e.g., strong dipole moment, excellent light absorption in the 550-650 nm, rich redox features, and excellent charge transport capabilities), that have been skillfully used in variety of applied fields, such as molecular photovoltaics, among others.

[1]  S. Clair, D. G. de Oteyza, Chem. Rev. 2019, 119, 4717

[2]  G. Bottari, et al. Coord. Chem. Rev. 2021, 428, 213605

[3]  G. Lavarda, J. Labella, M. V. Martinez-Diaz, M. S. Rodriguez Morgade, A. Osuka, T. Torres, Chem. Soc. Rev. 2022, 51, 9482-9619.

Speaker Bio

Tomás Torres is Director of the Institute of Advanced Research in Chemical Sciences (IAdChem), Professor of the Department of Organic Chemistry of the Autonoma University of Madrid (UAM) and Associate Senior Scientist of the IMDEA Nanociencia. Doctor in Chemistry (1978) by the UAM, he carried out postdoctoral stays in the Department of Organic Chemistry and Spectroscopy of the Max-Planck Institute for Biochemistry of Martinsried, Munich (Prof. Wolfram Schäfer, 1978-1980) as a fellow of the Max-Planck Society, and in the Institute of General Organic Chemistry of the CSIC-Department of Organic Chemistry of the UAM (1980-1981), within the first class of "Reincorporation Fellows". He worked in the Department of Chemical Research of the company Abelló, S.A./ Merck, Sharp and Dohme (1981-1985) in Madrid as Senior Researcher. In 1984 he obtained a position as Associate Professor and joined the UAM in 1985. In 2000 he became Professor of Organic Chemistry.

Full bio on faculty profile: https://www.nanociencia.imdea.org/es/imdea-nanociencia/personas/item/tomas-torres-cebada

Orcid: https://orcid.org/0000-0001-9335-6935