Purification and electronic characterisation of 18 isomers of the OPV acceptor material bis-[60]PCBM

W. Shi, X. Hou, T. Liu, X. Zhao, A. B. Sieval, J. C. Hummelen, T. J.S. Dennis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The as-produced isomer mixture of the organic photovoltaic device acceptor material bis-[60]PCBM has been purified into its constituents by peak-recycling HPLC, and those individual isomers were characterised by UV-Vis absorption spectroscopy and cyclic voltammetry. A total of 18 isomers were purified from the mixture to a standard exceeding 99.5% with respect to other isomers. The HOMOs, LUMOs, and HOMO-LUMO gaps of the purified isomers vary from -5.673 to -5.444 eV, -3.901 to -3.729 eV, and 1.664 to 1.883 eV, respectively. We also find a correlation between HPLC retention time and the relative positions of the addends; in that generally the closer the addends are to each other the longer the retention time of the isomer, and vice versa.

Original languageEnglish
Pages (from-to)975-978
Number of pages4
JournalChemical Communications
Volume53
Issue number5
DOIs
Publication statusPublished - 2017
Externally publishedYes

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