Circular dichroism probed by two-photon fluorescence microscopy in enantiopure chiral polyfluorene thin films

M. Savoini, Xiaofei Wu, M. Celebrano, J. Ziegler, P. Biagioni, S.C.J. Meskers, L. Duo, B. Hecht, M. Finazzi

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)
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Abstract

Two-photon fluorescence scanning confocal microscopy sensitive to circular dichroism with a diffraction-limited resolution well below 500 nm is demonstrated. With this method, the spatial variation of the circular dichroism of thermally annealed chiral polyfluorene thin films has been imaged. We observed circular dichroism associated with submicrometer-sized domains showing helicoidally twisted macromolecular organization. Domains with opposite chiroptical properties, corresponding to left- or right-handed molecular organization, coexist in the film. Our results are consistent with those obtained by one-photon imaging and illustrate the potential of two-photon imaging for use in studying helical macromolecular organization.
Original languageEnglish
Pages (from-to)5832-5835
Number of pages3
JournalJournal of the American Chemical Society
Volume134
Issue number13
DOIs
Publication statusPublished - 2012

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