以色列内盖夫本-古里安大学Weizmann, Yossi团队报道了烯烃复分解的等离子体可见–近红外光热激活制备光响应材料。相关研究成果发表在2023年1月26日出版的《自然—化学》。

光诱导催化和热等离子体技术是很有前途的领域，为创新研究创造了许多机会。光诱导烯烃复分解的最新进展促进了聚合物和材料科学的新应用，但需要进一步改进反应范围和效率。

该文中，研究人员提出了通过等离子体金纳米双锥的光热响应激活潜在的钌基烯烃复分解催化剂。对金纳米双锥尺寸的简单合成控制导致可调谐的局部表面等离子体共振带，从而能够用低能可见光和红外光引发催化剂。该方法应用于双环戊二烯的ROMP，制备具有优异光响应和机械性能的等离子体聚合物复合材料。此外，在所有测试的复分解过程中，这种催化剂活化方法被证明比通过常规加热活化显著更有效。

该项研究为提供广泛的光诱导烯烃复分解过程，特别是通过直接光热活化热潜催化剂的光诱导潜在有机反应铺平了道路。

附：英文原文

Title: Plasmonic visible–near infrared photothermal activation of olefin metathesis enabling photoresponsive materials

Author: Lemcoff, Nir, Nechmad, Noy B., Eivgi, Or, Yehezkel, Elad, Shelonchik, Ofir, Phatake, Ravindra S., Yesodi, Doron, Vaisman, Anna, Biswas, Aritra, Lemcoff, N. Gabriel, Weizmann, Yossi

Issue&Volume: 2023-01-26

Abstract: Light-induced catalysis and thermoplasmonics are promising fields creating many opportunities for innovative research. Recent advances in light-induced olefin metathesis have led to new applications in polymer and material science, but further improvements to reaction scope and efficiency are desired. Herein, we present the activation of latent ruthenium-based olefin metathesis catalysts via the photothermal response of plasmonic gold nanobipyramids. Simple synthetic control over gold nanobipyramid size results in tunable localized surface plasmon resonance bands enabling catalyst initiation with low-energy visible and infrared light. This approach was applied to the ROMP of dicyclopentadiene, affording plasmonic polymer composites with exceptional photoresponsive and mechanical properties. Moreover, this method of catalyst activation was proven to be remarkably more efficient than activation through conventional heating in all the metathesis processes tested. This study paves the way for providing a wide range of photoinduced olefin metathesis processes in particular and photoinduced latent organic reactions in general by direct photothermal activation of thermally latent catalysts.

DOI: 10.1038/s41557-022-01124-7

Source: https://www.nature.com/articles/s41557-022-01124-7