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Phys Chem Chem Phys. 2012 Nov 28;14(44):15282-5. doi: 10.1039/c2cp42452e. Epub 2012 Oct 10.

Effect of temperature on symmetry breaking excited state charge separation: restoration of symmetry at elevated temperature.

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  • 1School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram (IISER-TVM), CET Campus, Sreekaryam, Thiruvananthapuram, Kerala, India695016.


With an increase in temperature, an unprecedented restoration of symmetry in the symmetry breaking excited state charge transfer is observed in a geminal pair of near-orthogonally connected perylenimide dimers. Such restoration of symmetry could be attributed to the interchromophoric planarization and/or loss of solvation asymmetry at elevated temperature resulting in enhanced fluorescence quantum yield.

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