Guo Rong, Su Feifei, Wang Hui, Guo Yuexin, Yao Huiqin, Huang Gailing, Li Jian, Liang Zupei, Shi Keren, Ma Shulan
Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry , Beijing Normal University , Beijing 100875 , People's Republic of China.
School of Pharmacy , North China University of Science and Technology , Tangshan 063210 , People's Republic of China.
Inorg Chem. 2019 Apr 15;58(8):4979-4988. doi: 10.1021/acs.inorgchem.8b03636. Epub 2019 Apr 1.
Tunable luminescence (quenching or blue shift) of HNA/OS-LRH composites (HNA is 3-hydroxy-2-naphthoic acid; OS is the anionic surfactant of 1-octanesulfonic acid sodium; LRHs are layered rare-earth hydroxides, R = Tb, Y) in the solid state and delaminated state is reported, which is utilized as an effective fluorescent probe for detecting metal ions. HNA/OS species are intercalated into LRH layers to generate composites of HNA OS-LTbH ( x = 0.10, 0.15, 0.20 , 0.25) and HNA OS-LYH ( y = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30). In the solid state, LYH composites exhibit green emissions (from 493 to 504 nm) with a large blue shift in comparison to the 542 nm emission of free HNA anions, while in the delaminated state in formamide (FM), the composites display blue emission (480 nm) relative to the green emission (512 nm) of an HNA soltuion in FM. However, LTbH composites display coquenched luminescence in both the solid state and delaminated state. Also, HNAOS-1:1-LYH, HNAOS-1:2-LYH, and HNAOS-1:1-LYH (1:1 and 1:2 are HNA:NaOH molar ratios) show significantly elongated fluorescence lifetimes of 15.35, 14.37, and 12.72 ns, respectively, in comparison with free HNA-Na (6.44 ns), and their quantum yields of 23.40%, 21.97%, and 22.31%, respectively, are much larger than that of free HNA-Na (4.86%). The LTbH composite (HNAOS-1:1-LTbH) has also a relatively higher quantum yield of 12.46%. The HNAOS-1:1-LYH colloid exhibits excellent recognition selectivity for Al over other metal ions (Mg, Co, Ni, Cu, Zn, Pb, Cd, and Hg) with distinct fluorescence sensitization. It shows an intense change in its fluorescence emission when it is bound to Al ions, giving a lower detection limit of 6.32 × 10 M. This is novel research on the fluorescence chemosensing of LRH composites.
报道了HNA/OS-LRH复合材料（HNA为3-羟基-2-萘甲酸；OS为1-辛烷磺酸钠阴离子表面活性剂；LRHs为层状稀土氢氧化物，R = Tb、Y）在固态和剥离态下的可调谐发光（猝灭或蓝移），其被用作检测金属离子的有效荧光探针。HNA/OS物种插入LRH层中，生成HNA OS-LTbH（x = 0.10、0.15、0.20、0.25）和HNA OS-LYH（y = 0.05、0.10、0.15、0.20、0.25、0.30）复合材料。在固态下，LYH复合材料呈现绿色发射（493至504 nm），与游离HNA阴离子的542 nm发射相比有较大蓝移，而在甲酰胺（FM）中的剥离态下，复合材料相对于FM中HNA溶液的绿色发射（512 nm）呈现蓝色发射（480 nm）。然而，LTbH复合材料在固态和剥离态下均显示共猝灭发光。此外，HNAOS-1:1-LYH、HNAOS-1:2-LYH和HNAOS-1:1-LYH（1:1和1:2为HNA:NaOH摩尔比）与游离HNA-Na（6.44 ns）相比，分别显示出显著延长的荧光寿命，分别为15.35、14.37和12.72 ns，其量子产率分别为23.40%、21.97%和22.31%，远高于游离HNA-Na（4.86%）。LTbH复合材料（HNAOS-1:1-LTbH）也具有相对较高的量子产率，为12.46%。HNAOS-1:1-LYH胶体对Al相对于其他金属离子（Mg、Co、Ni、Cu、Zn、Pb、Cd和Hg）表现出优异的识别选择性，具有明显的荧光敏化。当它与Al离子结合时，其荧光发射有强烈变化，检测下限低至6.32×10⁻⁶ M。这是关于LRH复合材料荧光化学传感的新颖研究
