Unearth the Luminescence Potential of Metal-Organic Frameworks: Adopting a Feasible Strategy to Fabricate One Ratiometric Fluorescence Sensor for Monitoring Both 1-Hydroxypyrene and Cu2.
Unearth the Luminescence Potential of Metal-Organic Frameworks: Adopting a Feasible Strategy to Fabricate One Ratiometric Fluorescence Sensor for Monitoring Both 1-Hydroxypyrene and Cu2.
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DOI：
10.1021/acs.inorgchem.1c02794
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发表时间：
2022-01
影响因子：
4.6
通讯作者：
Yingmin Jin;Wanpeng Ma;B. Yan
中科院分区：
文献类型：
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作者：
Yingmin Jin;Wanpeng Ma;B. Yan
本工作采用可行的设计策略，成功制备了一种新型的具有双发射中心的发光杂化材料Eu（TTA）0.2@9-1-UMOF。首先采用固溶体方法包覆第二配体1，2，4-苯三甲酸（H3 BTC），有效提高了原有LMOF的配体基发光强度，为引入第二发光中心提供了功能位，然后通过合成后配位修饰的方法将红色发射源Eu 3+负载到骨架中，最后通过红外光谱分析，确定了Eu 3+的发光中心。最后，为了平衡613 nm（Eu 3+）和465 nm（1，4-萘二甲酸（H2 NDC））的发射强度，引入了2-噻吩甲酰三氟丙酮（TTA）作为强天线。由于Eu（TTA）0.2@9-1-UMOF具有优异的发光性能和结构稳定性，可进一步发展为检测1-羟基芘（1-HP，多环芳烃（PAHs）的生物标志物）和Cu 2+的比率传感器，促进人体健康的预诊断。值得注意的是，Eu（TTA）0.2@9-1-UMOF对1-HP和Cu 2+都具有良好的选择性识别能力，灵敏度高（检测限分别为4.06 × 10-6 mg/mL、3.85 × 10-7 mol/L），响应速度快。此外，Eu（TTA）0.2@9-1-UMOF作为荧光探针在实际样品中1-HP和Cu ~（2+）的测定中显示了很大的潜力。更重要的是，这项工作拓宽了用于分析应用的双/多LMOF传感器的发展道路。
In this work, a novel luminescent hybrid material with double emission centers (Eu(TTA)0.2@9-1-UMOF) is successfully prepared, adopting a feasible design strategy. Initially, the second ligand 1,2,4-benzenetricarboxylic acid (H3BTC) is encapsulated based on a solid solution approach, which effectively improves the ligand-based emission intensity of the original LMOF and provides functional sites for introducing the second luminescent center; then, Eu3+ as the red emission source is loaded into the frameworks through a coordination post-synthetic modification method; finally, to balance the emission intensity at 613 nm (Eu3+) and 465 nm (1,4-naphthalenedicarboxylic acid (H2NDC)), 2-thenoyltrifluoroacetone (TTA) as a powerful antenna is introduced. Given the outstanding luminescence properties and structural stability of Eu(TTA)0.2@9-1-UMOF, it is further developed as a ratiometric sensor for detecting 1-hydroxypyrene (1-HP, the biomarker of polycyclic aromatic hydrocarbons (PAHs)) and Cu2+, which promotes the pre-diagnosis of human health. Notably, Eu(TTA)0.2@9-1-UMOF exhibits excellent selective recognition ability for both 1-HP and Cu2+ with high sensitivity (LOD = 4.06 × 10-6 mg/mL, 3.85 × 10-7 mol/L, respectively) and fast response speed. In addition, Eu(TTA)0.2@9-1-UMOF as a fluorescent probe shows great potential for the determination of 1-HP and Cu2+ in actual samples. More importantly, this work widens the road for the development of dual/multiple LMOF-based sensors for analytical applications.