Polydiacetylene/silica nanocomposites with tunable mesostructure and thermochromatism from diacetylenic assembling molecules
Polydiacetylene/silica nanocomposites with tunable mesostructure and thermochromatism from diacetylenic assembling molecules
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DOI：
10.1021/ja053966p
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发表时间：
2005-09-21
影响因子：
15
通讯作者：
Lu, YF
中科院分区：
文献类型：
--
作者：
Peng, HS;Tang, J;Lu, YF
通过二炔基硅烷的自组装，合成了具有可调介观结构和可逆热致变色性的共轭聚二乙炔（PDA）/二氧化硅纳米复合材料。与以前的研究相比，PDA侧链通过非共价相互作用弱相互作用，本纳米复合材料中的侧链共价连接到无机二氧化硅框架，提供对分子排列，稳定性和电子性质的控制。此外，调整分子结构（例如，形状和侧链长度）允许控制介观结构（例如，立方和层状）和纳米复合材料的色响应（从不可逆到部分可逆，然后到完全可逆）。作为共价相互作用的结果，纳米复合材料也表现出更高的可逆色转变温度。本工作不仅为可重复使用的PDA传感器提供了响应性强的显色材料，而且对超分子组装体的设计和PDA显色机理的理解具有重要的基础价值。
Conjugated polydiacetylene (PDA)/silica nanocomposites with tunable mesostructures and reversible thermochromatism were synthesized through self-directed assembly of diacetylenic silanes. In contrast to the previous studies, where the PDA side chains interacted weakly through noncovalent interactions, the side chains in the present nanocomposites are covalently connected to the inorganic silica frameworks, providing control over the molecular alignment, stability, and electronic properties. Furthermore, tuning the molecular architecture (e.g., the shape and side-chain length) allows control over the mesostructure (e.g., cubic and lamellar) and chromatic response of the nanocomposites (from irreversible to partially reversible and then to completely reversible). As a result of the covalent interactions, the nanocomposites also demonstrate higher reversible chromatic transition temperatures. This work not only provides responsive robust chromatic materials toward practically reusable PDA sensors but also is of great fundamental value for the design of supramolecular assembly and the understanding of the chromatic mechanism of PDA.