Aggregation‐induced emission (AIE) provides an efficient strategy to synthesize highly luminescent metal nanoclusters (NCs), however, rational control of emission energy and intensity of metal NCs is still challenging. This communication reveals the impact of surface Au^I‐thiolate motifs on the AIE properties of Au NCs, by employing a series of water‐soluble glutathione (GSH)‐coordinated Au complexes and NCs as a model ([Au₁₀SR₁₀], [Au₁₅SR₁₃], [Au₁₈SR₁₄], and [Au₂₅SR₁₈]⁻, SR=thiolate ligand). Spectroscopic investigations show that the emission wavelength of Au NCs is adjustable from visible to the near‐infrared II (NIR‐II) region by controlling the length of the Au^I‐SR motifs on the NC surface. Decreasing the length of Au^I‐SR motifs also changes the origin of cluster luminescence from AIE‐type phosphorescence to Au⁰‐core‐dictated fluorescence. This effect becomes more prominent when the degree of aggregation of Au NCs increases in solution.

中文翻译：

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揭示硫（S）-硫醇盐基团对聚集诱导的金纳米团簇发射的影响。

聚集诱导发射（AIE）提供了一种合成高发光金属纳米团簇（NCs）的有效策略，但是，合理控制发射能量和金属NCs的强度仍具有挑战性。通过采用一系列水溶性谷胱甘肽（GSH）配位的Au络合物和NCs作为模型，这种交流揭示了表面Au ^I-硫醇盐基序对Au NCs的AIE性质的影响（[Au ₁₀ SR ₁₀ ]，[ Au ₁₅ SR ₁₃ ]，[Au ₁₈ SR ₁₄ ]和[Au ₂₅ SR ₁₈ ] ^-，SR ＝硫醇盐配体）。光谱研究表明，通过控制NC表面上的Au ^I- SR图案的长度，Au NC的发射波长可从可见光调整到近红外II（NIR-II）区域。减小Au ^I- SR基序的长度也将簇发光的起源从AIE类型的磷光变为Au ⁰核心指示的荧光。当溶液中Au NCs的聚集度增加时，此效果会更加突出。