School of Physical and Chemical Sciences Te Kura Matū Seminar Series

Heteroaromatic Molecules as Supramolecular Materials

Speaker

Samantha Bodman

Institute

SPCS PhD Chemistry Candidate, Under Supervision of Associate Professor Chris Fitchett

Time & Place

Wed, 13 Nov 2019 11:00:00 NZDT in Ernest Rutherford 141

All are welcome

Abstract

Over the past twenty years, remarkable progress has been made in the design and construction of organic electronic devices. Small molecules with conducting properties, such as polycyclic aromatic compounds, are used in the construction of organic semiconductors. Nitrogen containing polycyclic aromatic hydrocarbons are of particular interest since heteroatoms influence the electronic nature of the molecules. Systematic replacement of carbon atoms with electronegative nitrogen atoms in LED application has been a subject of interest due to the enhancement of the carrier transport of the system and opens new possibilities for device applications.

Singlet fission is a spin-allowed process that occurs when an organic chromophore is excited to an initial singlet state, which can then share its energy with a neighbouring chromophore resulting in the production of two triplet excited states. This process could considerably boost the efficiency of solar cells.1 Singlet fission has promising potential, yet the problem remains in finding suitable molecules that can undergo the process. In order for singlet fission to be efficient chromophores need to be coupled for optimal energy transfer.

This thesis involved the preparation of a series of novel heterocyclic aromatic compounds and investigation of their coordination chemistry with a range of different metals and counter ions. We have investigated a new class of singlet fissionable materials and this talk will include work on a series of anthracene and tetracene derivatives and their corresponding self-assembled arrays.

  1. M. B. Smith, Chem. Rev., 2010, 110, 6891-6936.

 All Welcome