Li Si, Yan Zhi-Ping, Li Xin-Lei, Kong Yu-Jin, Li Hai-Yang, Gao Guang-Gang, Zheng You-Xuan, Zang Shuang-Quan
Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou 450001 China.
State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China.
Adv Sci (Weinh). 2020 Jun 11;7(15):2000738. doi: 10.1002/advs.202000738. eCollection 2020 Aug.
The weakly coordinated anionic nitrate ligands in a centrosymmetric Ag 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 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|) ≈ 5 × 10. This rational approach using joint functional ligands further opens a new avenue to diverse multifunctional metal clusters for promising applications.
在一个中心对称的银簇中，弱配位的阴离子硝酸根配体被手性氨基酸和两个非手性的含磺酸基团的配体逐步取代，同时几乎保持原来的银（I）笼状结构。这种表面工程使原子精确的银簇表现出手性和荧光的高效协同效应，在金属簇中产生罕见的圆偏振发光，其不对称因子（|g|）≈5×10 。这种使用联合功能配体的合理方法进一步为各种多功能金属簇开辟了一条新途径，以实现有前景的应用。
