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具有温度响应颜色变化的苝酰亚胺水凝胶和溶致液晶

Perylene bisimide hydrogels and lyotropic liquid crystals with temperature-responsive color change.

作者信息

Görl Daniel, Soberats Bartolome, Herbst Stefanie, Stepanenko Vladimir, Würthner Frank

机构信息

Institut für Organische Chemie & Center for Nanosystems Chemistry , Universität Würzburg , Am Hubland , 97074 Würzburg , Germany . Email:

出版信息

Chem Sci. 2016 Nov 1;7(11):6786-6790. doi: 10.1039/c6sc02249a. Epub 2016 Jul 22.

DOI:10.1039/c6sc02249a
PMID:28451124
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5356028/
Abstract

The self-assembly of perylene bisimide (PBI) dyes bearing oligo ethylene glycol (OEG) units in water affords responsive functional nanostructures characterized by their lower critical solution temperature (LCST). Tuning of the LCST is realized by a supramolecular approach that relies on two structurally closely related PBI-OEG molecules. The two PBIs socially co-assemble in water and the resulting nanostructures exhibit a single LCST in between the transition temperatures of the aggregates formed by single components. This permits to precisely tune the transition from a hydrogel to a lyotropic liquid crystal state at temperatures between 26 and 51 °C by adjusting the molar fraction of the two PBIs. Owing to concomitant changes in PBI-PBI interactions this phase transition affords a pronounced color change with "fluorescence-on" response that can be utilized as a smart temperature sensory system.

摘要

在水中，带有低聚乙二醇（OEG）单元的苝二酰亚胺（PBI）染料的自组装产生了以其低临界溶液温度（LCST）为特征的响应性功能纳米结构。通过一种基于两个结构密切相关的PBI - OEG分子的超分子方法来实现对LCST的调节。这两个PBI在水中协同组装，所得纳米结构在由单一组分形成的聚集体的转变温度之间表现出单一的LCST。通过调节两种PBI的摩尔分数，这允许在26至51°C之间的温度下精确调节从水凝胶到溶致液晶态的转变。由于PBI - PBI相互作用的伴随变化，这种相变产生了具有“荧光开启”响应的明显颜色变化，可作为智能温度传感系统。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d0a/5356028/cfe33c7188ef/c6sc02249a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d0a/5356028/db21346677d8/c6sc02249a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d0a/5356028/d4d7559e465a/c6sc02249a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d0a/5356028/65392568ad71/c6sc02249a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d0a/5356028/54bc02555359/c6sc02249a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d0a/5356028/cfe33c7188ef/c6sc02249a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d0a/5356028/db21346677d8/c6sc02249a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d0a/5356028/d4d7559e465a/c6sc02249a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d0a/5356028/65392568ad71/c6sc02249a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d0a/5356028/54bc02555359/c6sc02249a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5d0a/5356028/cfe33c7188ef/c6sc02249a-f5.jpg

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