Szuwarzyński Michał, Wolski Karol, Pomorska Agata, Uchacz Tomasz, Gut Arkadiusz, Łapok Łukasz, Zapotoczny Szczepan
AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology, Al. Mickiewicza 30, 30-059, Krakow, Poland.
Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060, Krakow, Poland.
Chemistry. 2017 Aug 22;23(47):11239-11243. doi: 10.1002/chem.201702737. Epub 2017 Aug 1.
Surface-grafted polymer brushes of novel ladder-like architecture were proposed for inducing ordering of chromophores embedded therein. The brushes with acetylene side groups were obtained by surface-initiated photoiniferter-mediated polymerization. The acetylene moieties reacted then through a "click" process with an axially azide-bifunctionalized silicon phthalocyanine bridging the neighboring chains that inherently adopt extended conformations in dense brushes. FTIR, quartz crystal microbalance, and atomic force microscopy were used to study formation and structure of the photoactive brushes varying in grafting densities. Importantly, photophysical properties of the chromophores were virtually unaffected upon embedding them into the brushes, as evidenced by UV/Vis absorption and emission spectroscopy. Owing to the unique ordering of the chromophores, the proposed method may open new opportunities for the fabrication of light-harvesting systems suitable for photovoltaic or sensing applications.
人们提出了具有新型梯状结构的表面接枝聚合物刷，用于诱导嵌入其中的发色团有序排列。通过表面引发的光引发转移终止剂介导的聚合反应获得了带有乙炔侧基的刷子。然后，乙炔部分通过“点击”过程与轴向叠氮双功能化的硅酞菁反应，该硅酞菁桥接相邻链，这些链在致密刷子中固有地采用伸展构象。利用傅里叶变换红外光谱（FTIR）、石英晶体微天平（QCM）和原子力显微镜（AFM）研究了不同接枝密度的光活性刷子的形成和结构。重要的是，紫外可见吸收和发射光谱表明，发色团嵌入刷子后其光物理性质几乎未受影响。由于发色团的独特排列，该方法可能为制造适用于光伏或传感应用的光捕获系统开辟新的机会。
