具有径向芳香链的刚性树枝状大分子的独特功能和应用,Accounts of Chemical Research

当前位置： X-MOL 学术 › Acc. Chem. Res. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

具有径向芳香链的刚性树枝状大分子的独特功能和应用
Accounts of Chemical Research ( IF 16.4 ) Pub Date : 2021-12-03 , DOI: 10.1021/acs.accounts.1c00530
Takamasa Tsukamoto _{1,

2,

3} , Takane Imaoka _{1,

3} , Kimihisa Yamamoto _{1,

3}

Affiliation

树枝状大分子是高度支化的聚合物，被认为是巨大的单分子，从高分子化学和分子化学的角度来看，它们都是令人感兴趣的物质。利用树枝状大分子的径向层状结构和分子内纳米空间，研究了材料科学和生命科学中的各种应用。大多数树枝状大分子具有源自其含有许多sp ³型原子的有机链的柔性结构，而相对刚性的树枝状大分子仅由sp ²组成型原子很少被报道。最近已经阐明，这种刚性树枝状大分子表现出在其他材料中没有的特定芳香特性。树枝状苯甲胺 (DPA) 作为刚性树枝状大分子之一，只有sp ²-型C和N原子，在它们自己的大分子链中具有径向支化的π-共轭体系。这种几何和电子结构提高了树枝状大分子核心的电子密度并诱导了分子内电位梯度，从而提供了独特的反应性，从而产生了非凡的功能。刚性树枝状大分子的这种独特性质可以被视为一种新的非典型电子态，它基于放射状芳香链，在包含球形芳香性、莫比乌斯芳香性、金属芳香性和导电聚合物的传统芳香族化合物中没有发现。因此，这种未知的特性有望促进基础化学和材料化学的进一步发展。

"点击查看英文标题和摘要"

Unique Functions and Applications of Rigid Dendrimers Featuring Radial Aromatic Chains

Dendrimers, which are highly branched polymers and regarded as huge single molecules, are interesting substances from the aspect of not only polymer chemistry but also molecular chemistry. Various applications in materials science and life science have been investigated by taking advantage of the radially layered structures and intramolecular nanospaces of dendrimers. Most dendrimers have flexible structures that originate from their organic chains which contain many sp³-type atoms, while relatively rigid dendrimers composed only of sp²-type atoms have rarely been reported. It has been recently clarified that such rigid dendrimers exhibit a specific aromatic property not found in other materials. Dendritic phenylazomethines (DPAs), as one of the rigid dendrimers, have only sp²-type C and N atoms and possess a radially branched π-conjugation system in their own macromolecular chains. Such geometric and electronic structures heighten the electron density at the core of the dendrimer and induce an intramolecular potential gradient, which affords unique reactivities that lead to extraordinary functions. This unique property of the rigid dendrimers can be regarded as a new atypical electronic state based on radial aromatic chains not found in conventional aromatic compounds containing spherical aromaticity, Möbius aromaticity, metal aromaticity, and conductive polymers. Therefore, this as-yet-unknown characteristic is expected to contribute to the further development of fundamental and materials chemistry.

更新日期：2021-12-21

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>