材料科学
光致发光
镧系元素
荧光
等结构
量子产额
发光
铕
单晶
打赌理论
配体(生物化学)
晶体结构
结晶学
物理化学
光电子学
有机化学
化学
物理
离子
生物化学
受体
吸附
量子力学
作者
Wei Zhang,Enting Wang,Xinhao Li,Weixin Huang,Yakun Sun,Zheyuan Liu,Wei Zheng,Xiaodong Yi,Xin‐Xiong Li,Lingyun Li,Yan Yu
标识
DOI:10.1002/adom.202400603
摘要
Abstract Lanthanide ion contained metal–organic frameworks (MOFs) have garnered significant attention in the fields of solid‐state lighting and chemical sensing due to their porous structure and distinctive optical properties. However, they also present challenges because of the limited photoluminescence (PL) intensity resulting from the parity‐forbidden f–f transitions of lanthanide ions. Herein, the study reports a new heterometallic MOFs Ln 3 Li 2 L 4 (Li‐Ln‐MOF, Ln = Y, Eu, Tb and Dy, L = deprotonated 1,3,5‐tris(4‐carboxyphenyl)benzene) with a Brunauer‐Emmett‐Teller (BET) surface area of 774.1 m 2 /g. The porous crystal structure of Li‐Ln‐MOF is characterized by three kinds of channels interpenetrating with each other. By employing ligand alternation and lanthanide ion alloying strategies, Li‐Y 1‐ x Eu x ‐MOF1 crystal isostructural with Li‐Ln‐MOF is synthesized by using 2,4,6‐tris(4‐carboxyphenyl)‐1,3,5‐triazine (H 3 TATB) as ligand. The Li‐Y 0.7 Eu 0.3 ‐MOF1 crystal excels in the comprehensive performance with a BET surface area of 858.8 m 2 g −1 and a near‐unity PL quantum yield. The time density functional theory and natural transition orbitals calculations unravel that the outstanding optical properties Li‐Y 0.7 Eu 0.3 ‐MOF1 originates from the charge transfer between TATB 3− and Eu 3+ . Benefiting from the excellent comprehensive performance of Li‐Y 1‐ x Eu x ‐MOF1, the study reveals their potentials as single‐composition white‐light emission and fluorescent sensing probe for the detection of nitrobenzene.
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