Time resolved structural dynamics of butadiyne-linked porphyrin dimers

Franco V. A. Camargo, Christopher R. Hall, Harry L. Anderson, Stephen R. Meech, Ismael A. Heisler

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Abstract

In this work the timescales and mechanisms associated with the structural dynamics of butadiyne-linked porphyrin dimers are investigated through time resolved narrowband pump / broadband probe transient absorption spectroscopy. Our results confirm previous findings that the broadening is partly due to a distribution of structures with different (dihedral) angular conformations. Comparison of measurements with excitations on the red and blue sides of the Q-band unravel the ground and excited state conformational re-equilibration timescales. Further comparison to a planarized dimer, through addition of a ligand, provide conclusive evidence for the twisting motion performed by the porphyrin dimer in solution.
Original languageEnglish
Article number023608
Number of pages12
JournalStructural Dynamics
Volume3
Early online date14 Jan 2016
DOIs
Publication statusPublished - 14 Jan 2016

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