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Fluorescence Enhancement in the Solid State by Isolating Perylene Fluorophores in Metal-Organic Frameworks.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-05-14 , DOI: 10.1021/acsami.0c05512 Jialuo Li 1 , Shuai Yuan 1 , Jun-Sheng Qin 1 , Lan Huang 2 , Riya Bose 3 , Jiandong Pang 1 , Peng Zhang 1 , Zhifeng Xiao 1 , Kui Tan 3 , Anton V Malko 3 , Tahir Cagin 2 , Hong-Cai Zhou 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-05-14 , DOI: 10.1021/acsami.0c05512 Jialuo Li 1 , Shuai Yuan 1 , Jun-Sheng Qin 1 , Lan Huang 2 , Riya Bose 3 , Jiandong Pang 1 , Peng Zhang 1 , Zhifeng Xiao 1 , Kui Tan 3 , Anton V Malko 3 , Tahir Cagin 2 , Hong-Cai Zhou 1
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Polycyclic aromatic hydrocarbons such as perylene and pyrene and their derivatives are highly emissive fluorophores in solution. However, the practical applications of these materials in the field of molecular electronic and light-emitting devices are often hindered by self-quenching effects because of the formation of nonfluorescent aggregates in concentrated solutions or in the solid state. Herein, we demonstrate that aggregation-caused quenching of perylenes can be minimalized by molecular incorporation into metal–organic frameworks (MOFs). This study utilized a stable Zr6 cluster-based MOF, UiO-67, as a matrix. Linear linkers containing photoresponsive moieties were designed and incorporated into the parent UiO-67 scaffold through the partial replacement of the nonfluorescent linkers of a similar length, forming mixed-linker MOFs. The average distance between perylene moieties was tuned by changing the linker ratios, thus controlling the fluorescence intensity, emission wavelength, and quantum yield. Molecular modeling was further adopted to correlate the number of isolated perylene linkers within the framework with the ratio between the two linkers, thereby rationalizing the change in the observed fluorescent properties. Taking advantage of the tunable fluorescence, inherent porosity, and high chemical stability of this MOF platform, it was applied as a fluorescent sensor for oxygen detection in the gas phase, a model reaction, showing fast response and good recyclability.
中文翻译：
通过隔离金属-有机骨架中的Fluor荧光团在固态中增强荧光。
多环芳烃（例如per和and）及其衍生物是溶液中的高发射荧光团。然而，由于在浓缩溶液或固态中形成了非荧光聚集体，自激效应常常阻碍了这些材料在分子电子和发光器件领域的实际应用。在这里，我们证明了通过分子掺入金属有机骨架（MOF）可以使aggregation的聚集引起的猝灭最小化。这项研究利用了稳定的Zr 6基于群集的MOF UiO-67，作为矩阵。设计了含有光敏部分的线性接头，并通过部分替换相似长度的非荧光接头将其掺入母体UiO-67支架中，从而形成混合接头MOF。changing部分之间的平均距离可通过改变接头比例来调节，从而控制荧光强度，发射波长和量子产率。进一步采用分子模型将框架内分离的per连接基的数量与两个连接基之间的比例相关联，从而使观察到的荧光性质的变化合理化。利用此MOF平台的可调荧光，固有孔隙率和高化学稳定性，将其用作用于气相氧气检测的荧光传感器，
更新日期：2020-05-14
中文翻译：
通过隔离金属-有机骨架中的Fluor荧光团在固态中增强荧光。
多环芳烃（例如per和and）及其衍生物是溶液中的高发射荧光团。然而，由于在浓缩溶液或固态中形成了非荧光聚集体，自激效应常常阻碍了这些材料在分子电子和发光器件领域的实际应用。在这里，我们证明了通过分子掺入金属有机骨架（MOF）可以使aggregation的聚集引起的猝灭最小化。这项研究利用了稳定的Zr 6基于群集的MOF UiO-67，作为矩阵。设计了含有光敏部分的线性接头，并通过部分替换相似长度的非荧光接头将其掺入母体UiO-67支架中，从而形成混合接头MOF。changing部分之间的平均距离可通过改变接头比例来调节，从而控制荧光强度，发射波长和量子产率。进一步采用分子模型将框架内分离的per连接基的数量与两个连接基之间的比例相关联，从而使观察到的荧光性质的变化合理化。利用此MOF平台的可调荧光，固有孔隙率和高化学稳定性，将其用作用于气相氧气检测的荧光传感器，
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