A furaldehyde Schiff base, 4-[(2-furanylmethylene)amino]phenol(FMAP), was synthesized and fully characterized by elemental analysis, ^1H-NMR, IR, MS, UV-Vis, fluorescence and single-crystal X-ray diffraction. It c...A furaldehyde Schiff base, 4-[(2-furanylmethylene)amino]phenol(FMAP), was synthesized and fully characterized by elemental analysis, ^1H-NMR, IR, MS, UV-Vis, fluorescence and single-crystal X-ray diffraction. It crystallizes in the monoclinic system, space group P2_1/n with a = 6.2566(6), b = 13.2273(11), c = 11.3056(9) A, β = 93.1800(10)o, V = 934.19(14) A^3, Z = 4, M_r = 187.19, D_c = 1.331 g/cm^3, λ = 0.71073 a, F(000) = 392, GOOF = 1.022, R = 0.0396 and wR = 0.0992 for 4569 observed reflections with I 〉 2σ(I). Fluorescent spectroscopic investigation revealed that the Schiff base exhibited a high selectivity and sensitivity toward Al^3+ over other common metal ions in ethanol solution, and the detection limit of Al^3+ is up to 1.2 × 10^-7 M. The mass spectra and Job's plot analysis confirm the 1:1 stoichiometry between FMAP and Al^3+.展开更多
Specific fluorophore was introduced into ionic liquid based on its tunability,thus a kind of novel fluorescent ionic liquid probe[P66614][HQS]was designed,synthesized and characterized.Compared with non-fluorescent HQ...Specific fluorophore was introduced into ionic liquid based on its tunability,thus a kind of novel fluorescent ionic liquid probe[P66614][HQS]was designed,synthesized and characterized.Compared with non-fluorescent HQS,ionic liquid[P66614][HQS]emitted a certain amount of fluorescence,which could be attributed to the well-delocalized frontier orbitals and its charge transfer character,as demonstrated by quantum chemical calculation.Considering the interaction of[P66614][HQS]with metal ions,the application for detecting specific substance as a chemical sensor,such as Al3+was investigated.Compared with the traditional probe HQS,significant improvements in Al^3+detecting was achieved by[P66614][HQS]with stronger binding ability,better sensitivity and selectivity.The better performance of[P66614][HQS]was contributed to the changed charge distribution,leading to the stronger binding interaction.We believe that this new fluorescent ionic liquid exhibited unique properties in detecting Al^3+in aqueous solution,which would broaden the application of ionic liquids.展开更多
基金supported by Teaching Reform Innovation Program of Higher Education Institutions in Shanxi(Nos.J2016090 and J2017092)Soft Science Project of Shanxi Province(No.2016042008-1)
文摘A furaldehyde Schiff base, 4-[(2-furanylmethylene)amino]phenol(FMAP), was synthesized and fully characterized by elemental analysis, ^1H-NMR, IR, MS, UV-Vis, fluorescence and single-crystal X-ray diffraction. It crystallizes in the monoclinic system, space group P2_1/n with a = 6.2566(6), b = 13.2273(11), c = 11.3056(9) A, β = 93.1800(10)o, V = 934.19(14) A^3, Z = 4, M_r = 187.19, D_c = 1.331 g/cm^3, λ = 0.71073 a, F(000) = 392, GOOF = 1.022, R = 0.0396 and wR = 0.0992 for 4569 observed reflections with I 〉 2σ(I). Fluorescent spectroscopic investigation revealed that the Schiff base exhibited a high selectivity and sensitivity toward Al^3+ over other common metal ions in ethanol solution, and the detection limit of Al^3+ is up to 1.2 × 10^-7 M. The mass spectra and Job's plot analysis confirm the 1:1 stoichiometry between FMAP and Al^3+.
基金We acknowledge the support of the National Key Basic Research Program of China(2015CB251401)the Natural Science Foundation of China(21776239)+1 种基金Zhejiang Provincial Natural Science Foundation of China(LZ17B060001)the Fundamental Research Funds of the Central Universities,the instrument support of professor Peng Xiaogang,professor Jin Yizheng and associate professor Qin Haiyan.
文摘Specific fluorophore was introduced into ionic liquid based on its tunability,thus a kind of novel fluorescent ionic liquid probe[P66614][HQS]was designed,synthesized and characterized.Compared with non-fluorescent HQS,ionic liquid[P66614][HQS]emitted a certain amount of fluorescence,which could be attributed to the well-delocalized frontier orbitals and its charge transfer character,as demonstrated by quantum chemical calculation.Considering the interaction of[P66614][HQS]with metal ions,the application for detecting specific substance as a chemical sensor,such as Al3+was investigated.Compared with the traditional probe HQS,significant improvements in Al^3+detecting was achieved by[P66614][HQS]with stronger binding ability,better sensitivity and selectivity.The better performance of[P66614][HQS]was contributed to the changed charge distribution,leading to the stronger binding interaction.We believe that this new fluorescent ionic liquid exhibited unique properties in detecting Al^3+in aqueous solution,which would broaden the application of ionic liquids.