四面体
笼子
圆极化
结晶学
光学
物理
化学
材料科学
数学
组合数学
微带线
作者
Zhiwei Yao,Ting Gao,Peng‐Fei Yan,Yanyan Zhou,Hongfeng Li
出处
期刊:Dalton Transactions
[Royal Society of Chemistry]
日期:2025-01-01
卷期号:54 (14): 5731-5738
被引量:6
摘要
Upconverted circularly polarized luminescence (UC-CPL) materials have attracted significant attention due to their potential in optical sensing and bioimaging. However, achieving UC-CPL in lanthanide supramolecular systems remains a challenge due to the extended distances between lanthanide ions. Here, enantiopure tetrahedral cages, (Yb/Eu)4L4(R/S-BINAPO)4, are assembled using achiral C3-symmetric ligands, Ln(III) ions and chiral ancillary ligands. Upon 980 nm excitation, the heterometallic tetrahedral cages exhibit strong UC-CPL (glum = 0.22) and high ΦUC of 3.50 × 10-6. Moreover, through femtosecond transient absorption spectroscopy, we reveal that the ligand's triplet state (T1) serves as a critical mediator in the upconversion energy transfer process within the lanthanide complex, facilitating the efficient transfer of energy from the excited state of Yb3+ to the Eu3+ center via the mechanistic pathway Yb** → T1 → Eu*.
科研通智能强力驱动
Strongly Powered by AbleSci AI