Immobilization of Ethynyl‐π‐Extended Electron Acceptors with Amino‐Terminated SAMs by Catalyst‐Free Click Reaction
Immobilization of Ethynyl‐π‐Extended Electron Acceptors with Amino‐Terminated SAMs by Catalyst‐Free Click Reaction
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通过无催化剂点击反应固定带有氨基封端的 SAM 的乙炔基-π-扩展电子受体
DOI：
10.1002/chem.202001750
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Tajima Keisuke
中科院分区：
文献类型：
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作者：
Nakano Kyohei;Sanematsu Haruki;Kaji Yumiko;Takai Atsuro;Tajima Keisuke
研究了胺与乙炔基-π-扩展萘二酰亚胺之间的无催化剂定量反应对SiO2表面的改性。一种后反应方法，其中在形成氨基封端的自组装单分子层（SAM）后在表面进行无催化剂反应，导致用萘二酰亚胺分子对SiO2表面进行致密、均匀的改性。X射线反射率和角分辨X射线光电子能谱显示出层厚度和密度的一致结果。相比之下，预反应方法，其中氨基硅烷和乙炔基-π-扩展的萘二酰亚胺首先反应，然后形成SAM，在SiO2表面上提供稀疏的SAM，可能是由于萘二酰亚胺部分的空间位阻。通过无催化剂的定量反应原位修饰SiO2表面，提供了一种简便的途径，可用于多种应用的各种π共轭分子改性表面性质。
Surface modification of SiO2using a catalyst‐free quantitative reaction between an amine and an ethynyl‐π‐extended naphthalenediimide was investigated. A post‐reaction method, in which the catalyst‐free reaction was performed at the surface after the formation of amino‐terminated self‐assembled monolayers (SAMs), resulted in dense, uniform modification of the SiO2surface with the naphthalenediimide molecules. Both X‐ray reflectivity and angle‐resolved X‐ray photoemission spectroscopy showed consistent results for the layer thickness and density. In contrast, a pre‐reaction method, in which an amino‐silane and the ethynyl‐π‐extended naphthalenediimide reacted first and then formed a SAM, afforded a sparse SAM on the SiO2surface, probably due to the steric hindrance of the naphthalenediimide moieties. The in situ decoration of the SiO2surface by a catalyst‐free quantitative reaction offers a facile route for modifying surface properties with various π‐conjugated molecules suitable for many applications.