Photoswitchable Macroscopic Solid Surfaces Based On Azobenzene-Functionalized Polydopamine/Gold Nanoparticle Composite Materials: Formation, Isomerization and Ligand Exchange.,ChemPlusChem

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Photoswitchable Macroscopic Solid Surfaces Based On Azobenzene-Functionalized Polydopamine/Gold Nanoparticle Composite Materials: Formation, Isomerization and Ligand Exchange.
ChemPlusChem ( IF 3.0 ) Pub Date : 2020-01-22 , DOI: 10.1002/cplu.201900674
Attila Kunfi _{1,

2} , Rita Bernadett Vlocskó ₁ , Zsófia Keresztes ₃ , Miklós Mohai ₃ , Imre Bertóti ₃ , Ágnes Ábrahám _{1,

4} , Éva Kiss ₄ , Gábor London ₁

Affiliation

The facile preparation of dynamic interfaces is presented based on the combination of photoisomerizable azobenzenes and polydopamine (PDA)/Au nanoparticle composite materials. Azobenzenes with different spacer lengths (C3 , C6 ) and surface-binding groups (SH, NH2 ) were synthesized. The polymer layer on macroscopic quartz surface was prepared by the facile aerobic autopolymerisation of dopamine hydrochloride under basic conditions. The presence of redox-active catechol moieties meant that gold nanoparticles were formed on the polymer surface. The obtained UV-Vis spectroscopic results confirmed that following their successful assembly, the switching of azobenzenes on PDA/Au was not affected by the surface binding group and the spacer length of the azobenzene molecules under the measurement conditions. Furthermore, facilitated by the curved nature of the Au particles, the surface-bound azobenzene layer could be reconstructed by ligand-exchange processes, and the photochemical characterization of the mixed layer was performed.

中文翻译：

基于偶氮苯官能化聚多巴胺/金纳米颗粒复合材料的光开关宏观固体表面：形成，异构化和配体交换。

基于可光异构的偶氮苯和聚多巴胺（PDA）/ Au纳米颗粒复合材料的组合，提出了动态界面的简便制备方法。合成了具有不同间隔长度（C3，C6）和表面结合基团（SH，NH2）的偶氮苯。宏观石英表面上的聚合物层是通过在碱性条件下使多巴胺盐酸盐容易地进行好氧自聚合而制得的。氧化还原活性邻苯二酚部分的存在意味着金纳米颗粒在聚合物表面上形成。所获得的UV-Vis光谱结果证实，在其成功组装之后，在测量条件下，PDA / Au上的偶氮苯的转换不受偶氮苯分子的表面结合基团和间隔基长度的影响。此外，

更新日期：2020-01-22

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