Prasetyanto Eko Adi, Atoini Youssef, Donato Loic, Hsu Chien-Wei, De Cola Luisa
Institut de Science et D'Ingénierie Supramoléculaires (ISIS - UMR 7006), Université de Strasbourg, CNRS, Strasbourg, France.
Department of Pharmacy, School of Medicine and Health Sciences, Atma Jaya Catholic University of Indonesia, Jakarta, Indonesia.
Front Chem. 2022 May 5;10:829538. doi: 10.3389/fchem.2022.829538. eCollection 2022.
Metal clusters have gained a lot of interest for their remarkable photoluminescence and catalytic properties. However, a major drawback of such materials is their poor stability in air and humidity conditions. Herein we describe a versatile method to synthesize luminescent Cu(I) clusters inside the pores of zeolites, using a sublimation technique with the help of high vacuum and high temperature. The porous materials play an essential role as a protecting media against the undesirable and easy oxidation of Cu(I). The obtained clusters show fascinating luminescence properties, and their reactivity can be triggered by insertion in the pores of organic monodentate ligands such as pyridine or triphenylphosphine. The coordinating ligands can lead to the formation of Cu(I) complexes with completely different emission properties. In the case of pyridine, the final compound was characterized and identified as a cubane-like structure. A thermochromism effect is also observed, featuring, for instance, a hypsochromic effect for a phosphine derivative at 77K. The stability of the encapsulated systems in zeolites is rather enthralling: they are stable and emissive even after several months in the air.
金属簇因其卓越的光致发光和催化性能而备受关注。然而，这类材料的一个主要缺点是它们在空气和湿度条件下稳定性较差。在此，我们描述了一种通用方法，借助高真空和高温的升华技术，在沸石孔内合成发光的Cu(I)簇。多孔材料作为一种保护介质，对防止Cu(I)发生不良且易发生的氧化起着至关重要的作用。所得到的簇表现出迷人的发光性能，并且通过插入有机单齿配体（如吡啶或三苯基膦）的孔中可以触发它们的反应活性。配位配体可导致形成具有完全不同发射特性的Cu(I)配合物。在吡啶的情况下，最终化合物经表征并确定为类似立方烷的结构。还观察到热致变色效应，例如，在77K时膦衍生物呈现蓝移效应。封装在沸石中的体系的稳定性相当引人入胜：即使在空气中放置数月后，它们仍稳定且发光。
