White-Fluorescent Dual-Emission Mechanosensitive Membrane Probes That Function by Bending Rather Than Twisting

Overview

Journal Angew Chem Int Ed Engl

Specialty Chemistry

Date 2018 Jun 21

PMID 29924457

Citations 9

Authors

Heorhii V Humeniuk

Arnulf Rosspeintner

Giuseppe Licari

Vasyl Kilin

Luigi Bonacina

Eric Vauthey

Naomi Sakai

Stefan Matile

Affiliations

Soon will be listed here.

Abstract

Bent N,N'-diphenyl-dihydrodibenzo[a,c]phenazine amphiphiles are introduced as mechanosensitive membrane probes that operate by an unprecedented mechanism, namely, unbending in the excited state as opposed to the previously reported untwisting in the ground and twisting in the excited state. Their dual emission from bent or "closed" and planarized or "open" excited states is shown to discriminate between micelles in water and monomers in solid-ordered (S ), liquid-disordered (L ) and bulk membranes. The dual-emission spectra cover enough of the visible range to produce vesicles that emit white light with ratiometrically encoded information. Strategies to improve the bent mechanophores with expanded π systems and auxochromes are reported, and compatibility with imaging of membrane domains in giant unilamellar vesicles by two-photon excitation fluorescence (TPEF) microscopy is demonstrated.

Citing Articles

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