Key Laboratory of Chemical Sensing and Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering and ‡Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, PR China.
ACS Appl Mater Interfaces. 2017 Feb 15;9(6):5337-5347. doi: 10.1021/acsami.6b15613. Epub 2017 Feb 1.
In attempts to investigate the potential luminescent sensing materials for sensitive detection of environmental pollutants, a new family of lanthanide wheel cluster organic frameworks (Ln-WCOFs) UJN-Ln4 has been constructed by employing one of the cycloalkane dicarboxylic acid derivatives. Adopting different conformations, the ligand links Ln second building units (SBUs) and Ln tertiary building units (TBUs) to form a unique wheel cluster layer-pillared 3D framework featuring the coexistence of hydrophobic nanosized channels and trigonal antiprism arrays with hydrophilic cagelike chambers. Apart from charming structures, isostructural UJN-Ln4 displays interesting porous, water-stable features. Systematic luminescence studies demonstrate that solvent water molecules can enhance the emission intensity of solid-state UJN-Eu4. Acting as a recyclable luminescent probe, water-stable luminescent UJN-Eu4 exhibits superior "turn-off" detection for Fe and Cu ions in aqueous solutions. Due to the nanosized hydrophobic channels, UJN-Eu4 also shows highly sensitive sensing of sodium dodecyl benzenesulfonate (SDBS) via luminescence "turn-on" respondence, representing the first example of quantitatively detecting SDBS in aqueous solutions by employing luminescent lanthanide frameworks as fluorescent sensors. The results also open up the exploration of novel luminescent Ln-WCOFs exhibiting unique applications in sensitive detecting of harmful pollutants in aquatic environments.
为了探索潜在的用于环境污染物灵敏检测的发光传感材料，我们通过使用一种环烷二酸衍生物，构建了一类新型镧系轮簇有机框架（Ln-WCOFs） UJN-Ln4。采用不同的构象，配体连接 Ln 二级构筑单元（SBUs）和 Ln 三级构筑单元（TBUs），形成独特的轮簇层-支柱 3D 框架，其特征在于疏水性纳米通道和具有亲水性笼状腔的三角反棱柱阵列共存。除了迷人的结构外，同构的 UJN-Ln4 还具有有趣的多孔、水稳定的特性。系统的发光研究表明，溶剂水分子可以增强固态 UJN-Eu4 的发射强度。作为一种可回收的发光探针，水稳定的发光 UJN-Eu4 对水溶液中的 Fe 和 Cu 离子表现出优异的“关闭”检测性能。由于纳米疏水性通道，UJN-Eu4 还通过发光“开启”响应对十二烷基苯磺酸钠（SDBS）表现出高灵敏度的传感，这代表了首次通过使用发光镧系框架作为荧光传感器在水溶液中定量检测 SDBS。这些结果还开辟了探索新型发光 Ln-WCOFs 的途径，这些发光 Ln-WCOFs 在灵敏检测水环境污染中的有害污染物方面具有独特的应用。
