当前位置：
X-MOL 学术
›
Chem. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Supramolecular Oligourethane Gel with Multicolor Luminescence Controlled by Mechanically Sensitive Hydrogen-Bonding.
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-06-30 , DOI: 10.1021/acs.chemmater.0c01620 Nan Jiang 1 , Shi-Hao Ruan 2 , Xing-Man Liu 1 , Dongxia Zhu 1 , Bing Li 3 , Martin R Bryce 4
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-06-30 , DOI: 10.1021/acs.chemmater.0c01620 Nan Jiang 1 , Shi-Hao Ruan 2 , Xing-Man Liu 1 , Dongxia Zhu 1 , Bing Li 3 , Martin R Bryce 4
Affiliation
|
We report a new type of mechanically sensitive multicolor luminescent oligourethane gel (OUA-gel). The conformation of the oligomeric chains can be controlled by changing the strength of hydrogen bonds. The optical properties of the oligomers are highly dependent on the conformations which vary in response to mechanical stresses and phase transitions. The design relies on the introduction of a single mechanical chromophore, aurintricarboxylic acid, with propeller-like, spatially crowded, and highly twisted conformations, and the presence of three carboxyl groups, which provide multidirectional hydrogen-bonding opportunities. Introducing dimethylsulfoxide (DMSO) as an additional H-bond acceptor molecule leads to a viscous OUA-gel which exhibits multiemission colors because of changes in the chain conformation within the matrix, which are induced by different strengths of H bonds. The conformation can be adjusted by mechanical force or temperature, both of which influence the H-bonding. The multifunctional and multicolored mechanochromism of the OUA-gel has great promise in sensing applications. The results represent a substantial step toward understanding the mechanism of polychromism in soft materials and the molecular design of advanced smart materials.
中文翻译：
具有机械敏感氢键控制的多色发光的超分子低聚聚氨酯凝胶。
我们报告了一种新型机械敏感多色发光低聚聚氨酯凝胶（ OUA-gel ）。寡聚链的构象可以通过改变氢键的强度来控制。低聚物的光学性质高度依赖于响应机械应力和相变而变化的构象。该设计依赖于引入单一机械发色团金三羧酸，其具有螺旋桨状、空间拥挤且高度扭曲的构象，以及三个羧基的存在，这提供了多向氢键结合的机会。引入二甲基亚砜（DMSO）作为额外的氢键受体分子会产生粘稠的OUA 凝胶，由于不同强度的氢键引起的基质内链构象的变化，该凝胶表现出多种发射颜色。构象可以通过机械力或温度来调节，这两者都会影响氢键。 OUA-凝胶的多功能和多色机械致变色性在传感应用中具有广阔的前景。这些结果代表着在理解软材料多色机制和先进智能材料的分子设计方面迈出了实质性的一步。
更新日期：2020-07-14
中文翻译：
具有机械敏感氢键控制的多色发光的超分子低聚聚氨酯凝胶。
我们报告了一种新型机械敏感多色发光低聚聚氨酯凝胶（ OUA-gel ）。寡聚链的构象可以通过改变氢键的强度来控制。低聚物的光学性质高度依赖于响应机械应力和相变而变化的构象。该设计依赖于引入单一机械发色团金三羧酸，其具有螺旋桨状、空间拥挤且高度扭曲的构象，以及三个羧基的存在，这提供了多向氢键结合的机会。引入二甲基亚砜（DMSO）作为额外的氢键受体分子会产生粘稠的OUA 凝胶，由于不同强度的氢键引起的基质内链构象的变化，该凝胶表现出多种发射颜色。构象可以通过机械力或温度来调节，这两者都会影响氢键。 OUA-凝胶的多功能和多色机械致变色性在传感应用中具有广阔的前景。这些结果代表着在理解软材料多色机制和先进智能材料的分子设计方面迈出了实质性的一步。
京公网安备 11010802027423号