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Design of light-triggered lyotropic liquid crystal mesophases and their application as molecular switches in "on demand" release - Zurich Open Repository and Archive


Aleandri, Simone; Speziale, Chiara; Mezzenga, Raffaele; Landau, Ehud (2015). Design of light-triggered lyotropic liquid crystal mesophases and their application as molecular switches in "on demand" release. Langmuir, 31(25):6981-6987.

Abstract

Here, we present the design and assembly of a new light-responsive functional lyotropic liquid crystal system using host–guest lipidic mesophases (LMPs). Light as an external stimulus has many advantages in comparison to other stimuli: it is milder than acids or bases, and variation of intensity and duration can provide a high level of pharmacological control. The LMPs are composed of monoolein (MO) and oleic acid (OA) as host lipids and a small amount of a judiciously synthesized lipid bearing an azobenzene photoactive unit as a guest. While preserving the structure and stability of the host lipidic aggregates, the guest lipids render them specific functionalities. Single-step and sequential light-triggered release and retention of the embedded dye molecules are demonstrated, thereby achieving exquisite temporal, spatial, and dosage control of the release, opening up the possibility of using such lipidic biomaterials as effective matrices in therapy, when a continuous release of active drugs might be toxic.

Abstract

Here, we present the design and assembly of a new light-responsive functional lyotropic liquid crystal system using host–guest lipidic mesophases (LMPs). Light as an external stimulus has many advantages in comparison to other stimuli: it is milder than acids or bases, and variation of intensity and duration can provide a high level of pharmacological control. The LMPs are composed of monoolein (MO) and oleic acid (OA) as host lipids and a small amount of a judiciously synthesized lipid bearing an azobenzene photoactive unit as a guest. While preserving the structure and stability of the host lipidic aggregates, the guest lipids render them specific functionalities. Single-step and sequential light-triggered release and retention of the embedded dye molecules are demonstrated, thereby achieving exquisite temporal, spatial, and dosage control of the release, opening up the possibility of using such lipidic biomaterials as effective matrices in therapy, when a continuous release of active drugs might be toxic.

Citations

7 citations in Web of Science®
7 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:2015
Deposited On:26 Jan 2016 11:39
Last Modified:05 Apr 2016 19:59
Publisher:American Chemical Society (ACS)
ISSN:0743-7463
Publisher DOI:https://doi.org/10.1021/acs.langmuir.5b01945

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