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复合光致变色偶氮苯-海藻酸钠超分子水凝胶的可逆光消散

Reversible photodissipation of composite photochromic azobenzene-alginate supramolecular hydrogels.

作者信息

Leistner Anna-Lena, Kistner David Georg, Fengler Christian, Pianowski Zbigniew L

机构信息

Institut für Organische Chemie Karlsruher Institut für Technologie Campus Süd, Fritz-Haber-Weg 6 76131 Karlsruhe Germany

Institut für Technische Chemie and Polymerchemie Karlsruher Institut für Technologie Campus Süd, Engesserstraße 18 76128 Karlsruhe Germany.

出版信息

RSC Adv. 2022 Feb 9;12(8):4771-4776. doi: 10.1039/d1ra09218a. eCollection 2022 Feb 3.

DOI:10.1039/d1ra09218a
PMID:35425487
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8981262/
Abstract

Supramolecular smart materials can quickly elicit macroscopic changes upon external stimulation. Here we report that an azobenzene-containing cyclic dipeptide can form composite supramolecular hydrogels with alginate based on the charge complementarity, at lower loading than the critical gelation concentrations of either component. The gels can reversibly dissipate to fluids with UV light. They can also encapsulate and photorelease fluorescent cargo. Upon treatment of the gels with aqueous calcium salts, the alginate component is permanently cross-linked and the photochromic component is solubilized.

摘要

超分子智能材料在外部刺激下能够迅速引发宏观变化。在此，我们报道一种含偶氮苯的环二肽可基于电荷互补性与藻酸盐形成复合超分子水凝胶，其负载量低于任一成分的临界凝胶化浓度。该凝胶在紫外光照射下可可逆地消散为流体。它们还能包封并光释放荧光物质。用钙盐水溶液处理凝胶后，藻酸盐成分会发生永久交联，而光致变色成分则会溶解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/9589e4d7b53f/d1ra09218a-f12.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/9589e4d7b53f/d1ra09218a-f12.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/84e6d0525fcd/d1ra09218a-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/71904f35f4b3/d1ra09218a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/c0255d2e1933/d1ra09218a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/69068b1d6160/d1ra09218a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/e83dff97d18d/d1ra09218a-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/d8c667e81e41/d1ra09218a-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/f9d9c43c6eea/d1ra09218a-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/d16e7d600729/d1ra09218a-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/6a5957b44e58/d1ra09218a-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/a74153e270dc/d1ra09218a-f11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/72af/8981262/9589e4d7b53f/d1ra09218a-f12.jpg

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