Angewandte Chemie (International ed. in English) | VOL. 61
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Proton-Gradient-Driven Sensitivity Enhancement of Liposome-Encapsulated Supramolecular Chemosensors.

Publication Date Aug 26, 2022

Abstract

An overarching challenge in the development of supramolecular sensor systems is to enhance their sensitivity, which commonly involves the synthesis of refined receptors with increased affinity to the analyte. We show that a dramatic sensitivity increase by 1-2 orders of magnitude can be achieved by encapsulating supramolecular chemosensors inside liposomes and exposing them to a pH gradient across the lipid bilayer membrane. This causes an imbalance of the influx and efflux rates of basic and acidic analytes leading to a significantly increased concentration of the analyte in the liposome interior. The utility of our liposome-enhanced sensors was demonstrated with various host-dye reporter pairs and sensing mechanisms, and we could easily increase the sensitivity towards multiple biologically relevant analytes, including the neurotransmitters serotonin and tryptamine.

Concepts

Liposome Interior Lipid Bilayer Membrane Development Of Sensor Systems Orders Of Magnitude Basic Analytes Influx Rates Supramolecular Systems Development Of Systems Supramolecular Chemosensors Supramolecular Sensor

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No potential conflict of interest was reported by the authors. The conception and design of the study, acquisition of data, analysis and interpretatio...

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