Wang Yi, Lin Shaomin, Luo Jun, Huang Rui, Cai Hong, Yan Wei, Yang Huan
College of chemistry and Material Engineering, Gui Yang University, Guiyang 550005, China.
School of Material science and Engineering Han Shan Normal University, Chaozhou 521041, China.
Nanomaterials (Basel). 2018 Oct 7;8(10):796. doi: 10.3390/nano8100796.
Sesamol, is well-known antioxidant and can reduce the rate of oxidation and prolong expiration date. It is also potentially antimutagenic and antihepatotoxic, the detection of sesamol is important and remains a huge challenge. Herein, a new 3D alkaline earth Sr metal organic framework [Sr(BDC)DMACH₂O]n (BDC = benzene-1,4-dicarboxylate; DMAC = ,-dimethylacetamide) is synthesized and a probe based on Tb functionalized Sr-MOF. The Tb(3+)@Sr-MOF showed good luminescence and thermal property. Due to the energy competition between sesamol and ligand, the luminescence intensity of sesamol increases meantime luminescence intensity of Tb decreases, the ratio of the emission intensities (I/I) linearly increases with sesamol in concentrations ranging from 1 × 10 to 8 × 10 M. Furthermore, the fluorescence-detected circular test shows that the composite Tb(3+)@Sr-MOF can serve as ratiometric sensor for sensing of sesamol. This is the first example for self-calibrated detecting sesamol based on metal-organic framework (MOF).
芝麻酚是一种著名的抗氧化剂，能够降低氧化速率并延长保质期。它还具有潜在的抗诱变和抗肝毒性，因此对芝麻酚的检测至关重要，但仍然是一个巨大的挑战。在此，合成了一种新型的三维碱土金属锶金属有机框架[Sr(BDC)DMACH₂O]n（BDC = 对苯二甲酸；DMAC = N,N-二甲基乙酰胺），并制备了一种基于铽功能化锶金属有机框架的探针。Tb(3+)@Sr-MOF表现出良好的发光性能和热稳定性。由于芝麻酚与配体之间的能量竞争，芝麻酚的发光强度增加，同时铽的发光强度降低，在1×10⁻⁶至8×10⁻⁵ M的浓度范围内，发射强度之比（I/I₀）与芝麻酚浓度呈线性增加。此外，荧光检测圆二色性测试表明，复合Tb(3+)@Sr-MOF可作为用于检测芝麻酚的比率传感器。这是基于金属有机框架（MOF）自校准检测芝麻酚的首个实例。
