Zheng Hao-Yang, Lian Xiao, Qin Si-Jia, Yan Bing
Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China.
Dalton Trans. 2018 May 1;47(17):6210-6217. doi: 10.1039/c8dt00551f.
A new class of Ln-MOFs (Ln = Eu, Tb, Eu/Tb, Sm) are synthesized through a post-synthetic modification of the parent MOF, UMCM-NH2. The luminescence spectra of Eu-MOF, Tb-MOF and Eu/Tb-MOF exhibit the characteristic emission bands of ligands and corresponding Ln3+, particularly Eu3+. Multi-color luminescence could be modulated by adjusting the excitation wavelength of the Eu-MOF and Tb-MOF. What's more, white-light emission may be realized by co-doping the Eu3+ and Tb3+ due to the synergistic contribution of the three luminescence centers. In addition, the Eu-MOF is selected as a luminescence sensor to explore the potential of sensing organic small molecules. Most interestingly, it exhibits a highly selective, sensitive and rapid response to THF, which could be distinguished easily by the naked eye under UV-light irradiation. Consequently, Eu-MOF is a promising candidate as the "turn on" fluorescent probe for detecting THF that has been rarely reported.
通过对母体金属有机框架（MOF）UMCM-NH₂进行后合成修饰，合成了一类新型的镧系金属有机框架（Ln = Eu、Tb、Eu/Tb、Sm）。铕基金属有机框架（Eu-MOF）、铽基金属有机框架（Tb-MOF）和铕/铽基金属有机框架（Eu/Tb-MOF）的发光光谱显示出配体和相应Ln³⁺（特别是Eu³⁺）的特征发射带。通过调节Eu-MOF和Tb-MOF的激发波长，可以调制多色发光。此外，由于三个发光中心的协同作用，通过共掺杂Eu³⁺和Tb³⁺可以实现白光发射。此外，选择Eu-MOF作为发光传感器来探索传感有机小分子的潜力。最有趣的是，它对四氢呋喃（THF）表现出高度选择性、灵敏且快速的响应，在紫外光照射下肉眼可轻松区分。因此，Eu-MOF作为检测THF的“开启”型荧光探针是一个有前途的候选者，而这方面的报道很少。
