School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou, Jiangxi Province 341000, P.R. China.
School of Chemical and Environmental Engineering, Hanshan Normal University, Chaozhou, Guangdong Province 521041, P.R. China.
Dalton Trans. 2022 Apr 12;51(15):5983-5988. doi: 10.1039/d2dt00390b.
A novel Cd-based two-fold interpenetrated metal-organic framework (MOF), namely {[Cd(BTDB)(4,4-bpy)]·DMF} (JXUST-14), (H2BTDB = 4,4'-(benzo[][1,2,5]thiadiazole-4,7-diyl)dibenzoic acid and 4,4-bpy = 4,4-bipyridine), has been prepared and characterized. Single-crystal structure determination reveals that JXUST-14 has a tetranuclear cluster based 6-connected topological network with Schlafli symbol {4·6}. When soaked in common organic solvents and aqueous solutions with diverse pH values of 2-12 for 48 h, JXUST-14 remains stable. JXUST-14 is a highly selective and sensitive luminescent sensor for L-histidine (His) with a detection limit of 11.1 ppm. JXUST-14 is the first Cd-based MOF for the detection of His turn-on and fluorescence blue-shift effects. Experimental study and theoretical calculation suggest that the sensing process can be mainly attributed to a charge transfer and energy transfer mechanism. More interestingly, LED lamps of JXUST-14 and JXUST-14@His were successfully developed, which endowed efficient sensitivity for His detection and thus provide great potential for future applications.
一种新型的基于 Cd 的双重互穿金属有机骨架（MOF），即 {[Cd(BTDB)(4,4-bpy)]·DMF}（JXUST-14），（H2BTDB = 4,4'-(苯并[][1,2,5]噻二唑-4,7-二基)二苯甲酸和 4,4-bpy = 4,4-联吡啶），已经被制备和表征。单晶结构测定表明，JXUST-14 具有基于四核簇的 6 连接拓扑网络，Schlafli 符号为 {4·6}。当浸泡在常见的有机溶剂和具有不同 pH 值的水溶液中（pH 值为 2-12）48 小时后，JXUST-14 仍然稳定。JXUST-14 是一种对 L-组氨酸（His）具有高选择性和高灵敏度的发光传感器，检测限为 11.1ppm。JXUST-14 是第一个用于检测 His 的 Cd 基 MOF，具有开启和荧光蓝移效应。实验研究和理论计算表明，传感过程主要归因于电荷转移和能量转移机制。更有趣的是，成功开发了 JXUST-14 和 JXUST-14@His 的 LED 灯，它们对 His 检测具有高效的灵敏度，因此为未来的应用提供了巨大的潜力。
