纳米团簇
磷光
芳基
微秒
材料科学
纳秒
光化学
化学
纳米技术
物理
光学
有机化学
荧光
烷基
激光器
作者
Wei‐Dan Si,Chengkai Zhang,Meng Zhou,Zhi Wang,Lei Feng,Chen‐Ho Tung,Di Sun
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2024-02-16
卷期号:10 (7)
被引量:1
标识
DOI:10.1126/sciadv.adm6928
摘要
Arylation of gold holds paramount importance in the domain of organometallic chemistry; however, the exploration of arylgold nanoclusters remains in its infancy primarily due to the synthetic challenge. Here, we present a facile and effective arylation strategy to directly synthesize two arylgold nanoclusters (Au44a and Au44b), by using tetraarylborates, capable of transferring aryl fragments to metal centers. X-ray crystallography reveals that both Au44 nanoclusters contain an Au44 kernel co-protected by six aryl groups, two tetrahydrothiophene, and 16 alkynyl-ether ligands, the latter is generated in situ through Williamson ether reaction during the assembly processes. Notably, Au44 nanoclusters exhibit near-infrared (NIR) phosphorescence (λmax = 958 nm) and microsecond radiative relaxation at ambient condition, which is a thermal-controlled single/dual-channel phosphorescent emission revealed by temperature-dependent NIR, time-resolved emission, and femtosecond/nanosecond transition absorption spectra. This work represents a breakthrough in using aryl as protective ligands for the construction of gold nanoclusters, which is poised to have a transformative impact on organometallic nanoclusters.
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