A trichromatic MOF composite for multidimensional ratiometric luminescent sensing.
A trichromatic MOF composite for multidimensional ratiometric luminescent sensing.
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用于多维比例发光传感的三基色 MOF 复合材料
DOI：
10.1039/c8sc00021b
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发表时间：
2018-03-21
期刊：
影响因子：
8.4
通讯作者：
Duan CY
中科院分区：
文献类型：
--
作者：
Zhao H;Ni J;Zhang JJ;Liu SQ;Sun YJ;Zhou H;Li YQ;Duan CY
三色MOF复合材料共同利用其MOF基质和两种包封的阳离子以实现具有高选择性和灵敏度的前所未有的多维比率发光感测。具有广泛应用前景的低成本、高性能发光探针一直是人们积极追求的目标。传统的发光探针依赖于响应于分析物分子的单发射或双发射，表现出有限的灵敏度和选择性，因为单发射可以容易地受到许多非分析物因素的影响，而双发射只能提供单比率发光感测。在这里，我们报告了白光发射三色MOF复合材料（W2）作为第一个多维比率发光探针。它是通过同时将红色和绿色发光的铱和钌络合物阳离子作为封装的发光模块（ELM）通过离子交换合并到多孔的蓝色发光MOF中而容易地合成的。特定的挥发性有机溶剂（VOS）可以引起W2中MOF到ELM能量转移效率的VOS依赖性变化，而硝基芳族化合物（NAC）蒸气以不同的速率有趣地和前所未有地淬灭三种发射，这两者都可以实现可见光发光传感。每个VOS可以与发射峰高度的两个M0F与ELM比率的唯一组合相关，从而实现二维（2D）代码识别。此外，可以绘制出暴露于选择性NAC蒸气时两个比率的时间依赖性演变，实现第一个3D代码识别。合成和传感策略都可以进一步实施，以开发低成本和有效的发光探针。
A trichromatic MOF composite utilizes its MOF matrix and two encapsulated cations collectively to achieve unprecedented multi-dimensional ratiometric luminescent sensing with high selectivity and sensitivity. Low-cost, high-performance luminescent probes with wide application potential have been actively pursued. Conventional luminescent probes, which rely on single or dual emissions responsive to analyte molecules, demonstrate limited sensitivity and selectivity because the single emissions can be easily affected by many non-analyte factors, while the dual emissions can only offer single-ratiometric luminescent sensing. Here we report a white-light-emitting trichromatic MOF composite (W2) as the first multidimensional ratiometric luminescent probe. It is facilely synthesized by simultaneously incorporating red- and green-emitting iridium and ruthenium complex cations as encapsulated luminescent modules (ELMs) into a porous blue-emitting MOF via ion exchange. Specific volatile organic solvents (VOSs) can cause VOS-dependent changes to the MOF-to-ELM energy transfer efficiencies in W2, while nitroaromatic (NAC) vapors intriguingly and unprecedentedly quench the three emissions at different rates, both of which enable visible luminescent sensing. Each VOS can be correlated to a unique combination of the two MOF-to-ELM ratios of emission-peak heights, enabling a two-dimensional (2D) code recognition. Furthermore, the time-dependent evolution of the two ratios upon exposure to selective NAC vapors can be mapped out, achieving the first 3D code recognition. Both the synthetic and sensing strategies can be further implemented to develop low-cost and effective luminescent probes.
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