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Photoregulated Morphological Transformation of Spiropyran Derivatives Achieving the Tunability of Interfacial Hydrophilicity
Langmuir ( IF 3.7 ) Pub Date : 2021-09-03 , DOI: 10.1021/acs.langmuir.1c02053
Qian Wang 1 , Zhen Wu 1 , Penghua Qin 1 , Jing Ji 1 , Liming Lai 1 , Meizhen Yin 1
Affiliation  

Regulation of self-assembly morphology is an effective strategy to obtain advanced functional materials with expected properties. However, achieving remarkable morphological transformation by light irradiation is still a challenge. Herein, three simple spiropyran derivatives (SP1, SP2, and SP3) are constructed, achieving different degrees of morphological transformation from nanospheres to hollow tadpole-like structures (SP3), tubular structures (SP2), and microsheets (SP1) after ultraviolet light irradiation. Interestingly, the hollow tadpole-like structures (SP3) can further extend to Y-shaped or T-shaped tubular morphology. In the process, SP1, SP2, and SP3 can be isomerized from a closed-ring form (hydrophobicity) to an open-ring form (hydrophilicity) in different degrees, interacting differently with methanol solvent molecules. The formation of hollow structures or microsheets along with the isomerization of spiropyran derivatives contributes to the adjustment of the hydrophilicity of the interface. Therefore, SP1, SP2, and SP3 with photoregulated morphological transformation show promising applications in tunable interface materials.

中文翻译:

螺吡喃衍生物的光调控形态转化实现界面亲水性的可调性

自组装形态的调节是获得具有预期性能的先进功能材料的有效策略。然而,通过光照射实现显着的形态转变仍然是一个挑战。在此,构建了三种简单的螺吡喃衍生物(SP1SP2SP3),在紫外光照射后实现了从纳米球到空心蝌蚪状结构(SP3)、管状结构(SP2)和微片(SP1)的不同程度的形态转变。. 有趣的是,中空的蝌蚪状结构(SP3)可以进一步延伸到Y形或T形管状形态。正在进行中,SP1SP2SP3可以不同程度地从闭环形式(疏水性)异构化为开环形式(亲水性),与甲醇溶剂分子的相互作用不同。空心结构或微片的形成以及螺吡喃衍生物的异构化有助于调节界面的亲水性。因此,具有光调节形态转变的SP1SP2SP3在可调界面材料中显示出有前景的应用。
更新日期:2021-09-21
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