The halogen as a kind of alkylating reagent is used to introduce new group to realize the fluorescence sensors efficient of metal ion detection. The substituent at C-4 position was double bromine, which defined that t...The halogen as a kind of alkylating reagent is used to introduce new group to realize the fluorescence sensors efficient of metal ion detection. The substituent at C-4 position was double bromine, which defined that the halogen as an alkylating reagent should be further researched and detected for Hg2＋. Therefore, the N-n-butyl-4-[di（bromoethyl）]amino-1,8-naphthalimide has been synthesized to detect some metal ions. The title compound has been prepared via substitute reaction and was characterized by IR, 1H NMR, 13 C NMR, and MS. It crystallizes in triclinic, space group P1 with a = 9.0071（18）, b = 9.804（2）, c = 13.073（3）A, α = 73.17（3）, β = 71.73（3）, γ = 62.95（3）°, Z = 2, V = 961.5（3） A3, Dc = 1.666 g/cm3, F（000） = 484, μ（Mo Kα） = 4.232 mm-1, R = 0.0429 and w R = 0.1004. The presence of intermolecular hydrogen bonds as well as π-π stacking interaction led to the stability of the compound. The fluorescence intensity was obviously lower than that of other ions when Hg2＋ was added with the concentration of 1 × 10^-5 mol·L-1.展开更多
The synthesis of 1,4,5,8-tetramethoxynaphthalene-2-carboxaldehyde,an intermediate of shikonin was investigated.1,4,5,8-tetramethoxynaphthalene was prepared from the oxidation of 1,5-dinitronaphthalene and the reaction...The synthesis of 1,4,5,8-tetramethoxynaphthalene-2-carboxaldehyde,an intermediate of shikonin was investigated.1,4,5,8-tetramethoxynaphthalene was prepared from the oxidation of 1,5-dinitronaphthalene and the reaction product naphthazarin was directly methylated without been purified.The title compound was obtained by the formylation of 1,4,5,8-tetramethoxynaphthalene.The overall yield was 38.5% based on 1,5-dinitronaphthalene.展开更多
A new 3,4-disubstituted-l,8-naphthalimide derivative H1 was designed and synthesized as a selective fluorescent probe for Cu2＋ over miscellaneous metM ions in aqueous media. Upon mixing with Cup-＋ in CH3OH：H2O （1...A new 3,4-disubstituted-l,8-naphthalimide derivative H1 was designed and synthesized as a selective fluorescent probe for Cu2＋ over miscellaneous metM ions in aqueous media. Upon mixing with Cup-＋ in CH3OH：H2O （1：1, volume ratio）, the increase of fluorescence intensity and a bathochromic shift of absorbance of H1 could be observed with a notable color response （changing from yellow to pink）, htrthermore, Cu2＋ coordinates to the probe H1 and a 1：1 metal-ligand complex was formed.展开更多
A novel coordination polymer [Ba2（AQTC）（H2O）3]n（1, H4 AQTC = anthraquinone-1,4,5,8-tetracarboxylic acid） has been prepared under hydrothermal conditions and characterized by single-crystal X-ray diffraction, ele...A novel coordination polymer [Ba2（AQTC）（H2O）3]n（1, H4 AQTC = anthraquinone-1,4,5,8-tetracarboxylic acid） has been prepared under hydrothermal conditions and characterized by single-crystal X-ray diffraction, elemental analysis, infrared spectroscopy and thermogravimetric analysis. Two quinone oxygen atoms and all carboxylate oxygen atoms of AQTC4- are involved in coordination. Two equivalent barium ions are mainly linked by carboxylate oxygen atoms into a dimer. Neighbouring dimers are further connected by the AQTC4- ligand through carboxylate oxygen atom, leading to a 1-D chain structure. Every two adjacent chains are mainly further connected by face carboxylate oxygen atoms and water molecule, generating a two-dimensional layer structure. Such 2-D layer structures are connected with O（6） and O（6C） atoms from water molecules to form a 3-D structure. In addition, luminescent properties of 1 are also investigated.展开更多
A series of fluorescent chemosensors 1-3 were synthesized to detect transition metal ions. At the room temperature, fluorescence intensities of these chemosensors in acetonitrile without transition metal ions were fou...A series of fluorescent chemosensors 1-3 were synthesized to detect transition metal ions. At the room temperature, fluorescence intensities of these chemosensors in acetonitrile without transition metal ions were found to be very weak, due to the process of the efficient intramolecular photoinduced electron transfer （PET）. However, after addition of the transition metal ions, the chemoscnsor 1-3 exhibits obvious fluorescence enhancement. Moreover, the intensity of the fluorescence emission of chemosensors increases significantly in the presence of Zn^2＋ and Cd^2＋. The fluorescent chemosensors with different polyamine as receptors show diverse affinity abilities to the transition metal ions and signal the receptor-metal ion interaction by the intensity change of fluorescence emission.展开更多
基金supported by the National Natural Science Foundation of China(No.31572042)the Research Science Foundation in Technology Innovation of Harbin(No.2015RAYXJ010)
文摘The halogen as a kind of alkylating reagent is used to introduce new group to realize the fluorescence sensors efficient of metal ion detection. The substituent at C-4 position was double bromine, which defined that the halogen as an alkylating reagent should be further researched and detected for Hg2＋. Therefore, the N-n-butyl-4-[di（bromoethyl）]amino-1,8-naphthalimide has been synthesized to detect some metal ions. The title compound has been prepared via substitute reaction and was characterized by IR, 1H NMR, 13 C NMR, and MS. It crystallizes in triclinic, space group P1 with a = 9.0071（18）, b = 9.804（2）, c = 13.073（3）A, α = 73.17（3）, β = 71.73（3）, γ = 62.95（3）°, Z = 2, V = 961.5（3） A3, Dc = 1.666 g/cm3, F（000） = 484, μ（Mo Kα） = 4.232 mm-1, R = 0.0429 and w R = 0.1004. The presence of intermolecular hydrogen bonds as well as π-π stacking interaction led to the stability of the compound. The fluorescence intensity was obviously lower than that of other ions when Hg2＋ was added with the concentration of 1 × 10^-5 mol·L-1.
文摘The synthesis of 1,4,5,8-tetramethoxynaphthalene-2-carboxaldehyde,an intermediate of shikonin was investigated.1,4,5,8-tetramethoxynaphthalene was prepared from the oxidation of 1,5-dinitronaphthalene and the reaction product naphthazarin was directly methylated without been purified.The title compound was obtained by the formylation of 1,4,5,8-tetramethoxynaphthalene.The overall yield was 38.5% based on 1,5-dinitronaphthalene.
文摘A new 3,4-disubstituted-l,8-naphthalimide derivative H1 was designed and synthesized as a selective fluorescent probe for Cu2＋ over miscellaneous metM ions in aqueous media. Upon mixing with Cup-＋ in CH3OH：H2O （1：1, volume ratio）, the increase of fluorescence intensity and a bathochromic shift of absorbance of H1 could be observed with a notable color response （changing from yellow to pink）, htrthermore, Cu2＋ coordinates to the probe H1 and a 1：1 metal-ligand complex was formed.
基金Supported by the Youth Foundation of Nanyang Institute of Technology and Science&Technology Research Projects of Henan Provincial Education Department(14B150035)
文摘A novel coordination polymer [Ba2（AQTC）（H2O）3]n（1, H4 AQTC = anthraquinone-1,4,5,8-tetracarboxylic acid） has been prepared under hydrothermal conditions and characterized by single-crystal X-ray diffraction, elemental analysis, infrared spectroscopy and thermogravimetric analysis. Two quinone oxygen atoms and all carboxylate oxygen atoms of AQTC4- are involved in coordination. Two equivalent barium ions are mainly linked by carboxylate oxygen atoms into a dimer. Neighbouring dimers are further connected by the AQTC4- ligand through carboxylate oxygen atom, leading to a 1-D chain structure. Every two adjacent chains are mainly further connected by face carboxylate oxygen atoms and water molecule, generating a two-dimensional layer structure. Such 2-D layer structures are connected with O（6） and O（6C） atoms from water molecules to form a 3-D structure. In addition, luminescent properties of 1 are also investigated.
基金supported by the National Natural Science Foundation of China(No.20332020,No.20472079).
文摘A series of fluorescent chemosensors 1-3 were synthesized to detect transition metal ions. At the room temperature, fluorescence intensities of these chemosensors in acetonitrile without transition metal ions were found to be very weak, due to the process of the efficient intramolecular photoinduced electron transfer （PET）. However, after addition of the transition metal ions, the chemoscnsor 1-3 exhibits obvious fluorescence enhancement. Moreover, the intensity of the fluorescence emission of chemosensors increases significantly in the presence of Zn^2＋ and Cd^2＋. The fluorescent chemosensors with different polyamine as receptors show diverse affinity abilities to the transition metal ions and signal the receptor-metal ion interaction by the intensity change of fluorescence emission.
