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Stepwise Achievement of Circularly Polarized Luminescence on Atomically Precise Silver Clusters.

ABSTRACT: The weakly coordinated anionic nitrate ligands in a centrosymmetric Ag₂₀ cluster are replaced in a stepwise manner by chiral amino acids and two achiral luminescent sulfonic-group-containing ligands while nearly maintaining the original silver(I) cage structure. This surface engineering enables the atomically precise Ag₂₀ clusters to exhibit the high-efficiency synergetic effects of chirality and fluorescence, producing rare circularly polarized luminescence among the metal clusters with a large dissymmetry factor of (|g_lum|) ≈ 5 × 10^-3. This rational approach using joint functional ligands further opens a new avenue to diverse multifunctional metal clusters for promising applications.

SUBMITTER: Li S

PROVIDER: S-EPMC7404152 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature

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Stepwise Achievement of Circularly Polarized Luminescence on Atomically Precise Silver Clusters.

Li Si S Yan Zhi-Ping ZP Li Xin-Lei XL Kong Yu-Jin YJ Li Hai-Yang HY Gao Guang-Gang GG Zheng You-Xuan YX Zang Shuang-Quan SQ

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20200611 15

The weakly coordinated anionic nitrate ligands in a centrosymmetric Ag<sub>20</sub> cluster are replaced in a stepwise manner by chiral amino acids and two achiral luminescent sulfonic-group-containing ligands while nearly maintaining the original silver(I) cage structure. This surface engineering enables the atomically precise Ag<sub>20</sub> clusters to exhibit the high-efficiency synergetic effects of chirality and fluorescence, producing rare circularly polarized luminescence among the metal ...[more]

PMID: 32775159

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