南京林业大学Ye Sha带领的合作研究小组近日取得一项新成果，他们探索了碳硼烷的机械力化学。相关论文于2022年4月8日发表在《德国应用化学》杂志上。

通过超声机械力化学，研究小组发现o-碳硼烷是链中心聚合物的首选断裂位点，从而开发了一种新型的机械力载体。机理研究与链断裂的主要均裂机制一致。机械力生成的单碳硼烷碎片对醇类亲核试剂反应强烈。相比之下，具有不同区域化学性质的碳硼烷（m-碳硼烷）保持着较高的机械稳定性。DFT模拟提供了碳硼烷可变机械稳定性的起源。

研究人员表示，该基础研究为碳硼烷笼活化提供了新的外部刺激信号。

附：英文原文

Title: The Mechanochemistry of Carboranes

Author: Ye Sha, Zhou Zhou, Miao Zhu, Zhenyang Luo, Enhua Xu, Xiang Li, Hong Yan

Issue&Volume: 2022-04-08

Abstract: We developed  o  -carborane as a new mechanophore by showing that the  o  -carborane cluster is the preferred scission site in chain-centered polymers through ultrasonication mechanochemistry. Mechanistic studies are consistent with a predominately homolytic mechanism of chain scission. The mechanically generated monocarbaborane fragments are highly reactive toward alcohol nucleophiles. By contrast, carborane with a different regiochemistry (  m-  carborane) maintained its high mechanical stability. DFT simulations provide insights into the origins of carborane's mechanical lability. This fundamental research provides a new stimulus for carborane cage activation.

DOI: 10.1002/anie.202203169

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202203169