Wu Ting, Fitchett Christopher M, Brooksby Paula A, Downard Alison J
School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand.
MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Canterbury, Christchurch, New Zealand.
ACS Appl Mater Interfaces. 2021 Mar 17;13(10):11545-11570. doi: 10.1021/acsami.0c22387. Epub 2021 Mar 8.
Aryldiazonium ions are widely used reagents for surface modification. Attractive aspects of their use include wide substrate compatibility (ranging from plastics to carbons to metals and metal oxides), formation of stable covalent bonding to the substrate, simplicity of modification methods that are compatible with organic and aqueous solvents, and the commercial availability of many aniline precursors with a straightforward conversion to the active reagent. Importantly, the strong bonding of the modifying layer to the surface makes the method ideally suited to further on-surface (postfunctionalization) chemistry. After an initial grafting from a suitable aryldiazonium ion to give an anchor layer, a target species can be coupled to the layer, hugely expanding the range of species that can be immobilized. This strategy has been widely employed to prepare materials for numerous applications including chemical sensors, biosensors, catalysis, optoelectronics, composite materials, and energy conversion and storage. In this Review our goal is first to summarize how a target species with a particular functional group may be covalently coupled to an appropriate anchor layer. We then review applications of the resulting materials.
芳基重氮离子是用于表面改性的广泛使用的试剂。其使用的吸引人之处包括广泛的底物兼容性（从塑料到碳、金属和金属氧化物）、与底物形成稳定的共价键、与有机和水性溶剂兼容的改性方法的简单性，以及许多苯胺前体的商业可用性且可直接转化为活性试剂。重要的是，改性层与表面的强键合使该方法非常适合进一步的表面（后功能化）化学。从合适的芳基重氮离子进行初始接枝以形成锚定层后，目标物种可以与该层偶联，极大地扩展了可以固定的物种范围。该策略已被广泛用于制备用于众多应用的材料，包括化学传感器、生物传感器、催化、光电子学、复合材料以及能量转换和存储。在本综述中，我们的目标首先是总结具有特定官能团的目标物种如何与合适的锚定层共价偶联。然后我们回顾所得材料的应用。
