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机械门控形成供体–受体Stenhouse加合物实现机械化学多色软光刻
作者:小柯机器人 发布时间:2023/1/30 10:23:08


美国加州理工学院Robb Maxwell J.团队报道了机械门控形成供体–受体Stenhouse加合物,实现机械化学多色软光刻。相关研究成果发表在2023年1月23日出版的《自然—化学》。

被称为力敏团的应力敏感分子在机械力的作用下发生有效的化学转变。尽管开发出了各种响应应力而改变颜色的应力变色力敏团,但调节染料的性质通常需要独立制备离散的衍生物。

该文中,研究人员报道了一种力敏团平台,该平台能够实现机械门控多色显色反应。力敏团基于一种活化的呋喃前体-供体-受体Stenhouse加合物(DASA),其被掩蔽为一种异Diels–Alder加合物。力敏团的机械化学激活揭示了DASA前体,随后与仲胺的反应产生了强烈的DASA。重要的是,DASA的性质由胺控制,因此单个力敏团可以在激活后分化,以产生广泛的功能多样的DASA。研究人员通过建立机械化学多色软光刻的概念来强调该系统,通过局部压缩的迭代过程,然后与不同的胺反应,将复杂的多色复合图像打印到机械化学活性弹性体中。

附:英文原文

Title: Mechanically gated formation of donor–acceptor Stenhouse adducts enabling mechanochemical multicolour soft lithography

Author: Overholts, Anna C., Granados Razo, Wendy, Robb, Maxwell J.

Issue&Volume: 2023-01-23

Abstract: Stress-sensitive molecules called mechanophores undergo productive chemical transformations in response to mechanical force. A variety of mechanochromic mechanophores, which change colour in response to stress, have been developed, but modulating the properties of the dyes generally requires the independent preparation of discrete derivatives. Here we introduce a mechanophore platform enabling mechanically gated multicolour chromogenic reactivity. The mechanophore is based on an activated furan precursor to donor–acceptor Stenhouse adducts (DASAs) masked as a hetero-Diels–Alder adduct. Mechanochemical activation of the mechanophore unveils the DASA precursor, and subsequent reaction with a secondary amine generates an intensely coloured DASA. Critically, the properties of the DASA are controlled by the amine, and thus a single mechanophore can be differentiated post-activation to produce a wide range of functionally diverse DASAs. We highlight this system by establishing the concept of mechanochemical multicolour soft lithography whereby a complex multicolour composite image is printed into a mechanochemically active elastomer through an iterative process of localized compression followed by reaction with different amines.

DOI: 10.1038/s41557-022-01126-5

Source: https://www.nature.com/articles/s41557-022-01126-5

期刊信息

Nature Chemistry:《自然—化学》,创刊于2009年。隶属于施普林格·自然出版集团,最新IF:24.274
官方网址:https://www.nature.com/nchem/
投稿链接:https://mts-nchem.nature.com/cgi-bin/main.plex

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