Molecular aggregates

Molecular aggregates show optical properties usually different from those of the corresponding isolated molecules. According to spectroscopic properties their are classified either as H or J aggregates. The role of charge transfer states is believed to have considerable importance in energy transfer processes in photovoltaic cells or other devices based on organic materials.

aggrgate-pbi

REFERENCES

  1. Y. Li, J. Gao, S. Di Motta, F. Negri, Z. Wang, “Tri-N-annulated Hexarylene: an Approach to Well-defined Graphene Nanoribbons with large Dipoles”, J. Am. Chem. Soc., 132, (2010), 4208-4213.
  2. S. d’Agostino, F. Grepioni, D. Braga, D. Moreschi, V. Fattori, F. Delchiaro, S. Di Motta, F. Negri, "Exciton coupling in molecular salts of 2-(1,8-naphthalimido)ethanoic acid and cyclic amines: modulation of the solid-state luminescence", CrysEngComm, 15, (2013) 10470-10480, DOI: 10.1039/C3CE41651H. http://dx.doi.org/10.1039/C3CE41651H
  3. W. Liu, S. Canola, A. Köhn, B. Engels, F. Negri, R. F. Fink "A Model Hamiltonian Tuned Toward High Level Ab Initio Calculations to Describe the Character of Excitonic States in Perylenebisimide Aggregates", J. Comp. Chem., 39 (2018), 1979-1989, DOI:10.1002/jcc.25374