本征双态发射锌基 MOF 棒状纳米结构在智能手机读数中的应用基于视觉的四环素检测：基于 MOF 的色调,ACS Applied Materials & Interfaces

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本征双态发射锌基 MOF 棒状纳米结构在智能手机读数中的应用基于视觉的四环素检测：基于 MOF 的色调
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-09-21 , DOI: 10.1021/acsami.3c11950
Sameera Sh Mohammed Ameen ₁ , Faroq Omer Qasim _{2,

3} , Huda S Alhasan ₄ , Kosar H Hama Aziz ₅ , Khalid M Omer ₆

Affiliation

双态发射器（DSE）是在溶液和固态下都表现出荧光的实体，这为其在各个领域的应用开辟了广泛的可能性。使用本征发光金属有机框架（LMOF）开发检测平台对于各种应用来说是非常理想的。DSE MOF 作为内在 LMOF 的一个子类，由于不需要通过荧光团和/或使用发光连接体进行封装/功能化，因此非常有吸引力。在此，合成并表征了具有棒状纳米结构的高度稳定的本征双态蓝色发射（λ _{em = 425 nm）锌基 MOF（表示为 UoZ-2）。}据我们所知，溶液中分散形式的蓝色发射 Zn-MOF 的本征 DSE 和固态荧光尚未见报道。当添加四环素 (TC) 时，由于聚集诱导发射 (AIE)，观察到从蓝色到黄绿色的连续颜色演变，并且显着增强。因此，设计了一个基于灵敏比例测量的视觉检测平台，独立于溶液和纸上，利用 UoZ-2 单独和 UoZ-2:TC 的 DSE 和 AIE 特性来检测 TC。检测限估计为 4.5 nM，被认为是用于 TC 传感的最灵敏的比率荧光探针之一。比例纸基 UoZ-2 传感器通过识别现场 TC 检测中的 RGB 值，显示出可靠的 TC 定量分析，并具有令人满意的回收率。

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Intrinsic Dual-State Emission Zinc-Based MOF Rodlike Nanostructures with Applications in Smartphone Readout Visual-Based Detection for Tetracycline: MOF-Based Color Tonality

Dual-state emitters (DSEs) are entities that exhibit fluorescence in both the solution and solid state, which open up a wide range of possibilities for their utilization in various fields. The development of detection platforms using intrinsic luminescent metal–organic frameworks (LMOFs) is highly desirable for a variety of applications. DSE MOFs as a subclass of intrinsic LMOFs are highly attractive due to no need for encapsulation/functionalization by fluorophores and/or using luminescent linkers. Herein, a highly stable intrinsic dual-state blue emission (λ_em = 425 nm) zinc-based MOF with rodlike nanostructures (denoted as UoZ-2) was synthesized and characterized. To the best of our knowledge, intrinsic DSE of Zn-MOFs with blue emission in the dispersed form in solution and solid-state fluorescence have not been reported yet. When tetracycline (TC) was added, a continuous color evolution from blue to greenish-yellow with dramatic enhancement was observed due to aggregation induced emission (AIE). Thus, a sensitive ratiometry-based visual detection platform, in solution and on paper independently, was designed for detection of TC exploiting the DSE and AIE properties of UoZ-2 alone and UoZ-2:TC. The detection limit was estimated to be 4.5 nM, which is considered to be one of the most sensitive ratiometric fluorescent probes for TC sensing. The ratiometry paper-based UoZ-2 sensor displays a reliable TC quantitative analysis by recognizing RGB values in the on-site TC detection with satisfactory recoveries.

更新日期：2023-09-21

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