【摘要】 设计合成了2个新型水溶性中氮茚季铵盐化合物4a{氯化2-[N’-(3-氰基-中氮茚-1-甲酰基)肼基]酰乙基-1-吡啶鎓盐}和4b{氯化2-[N’-(3-氰基-中氮茚-1-甲酰基)肼基]酰乙基-1-(2-甲基吡啶)鎓盐},采用红外光谱、核磁共振、质谱和元素分析对其进行了结构表征,并研究了它们的光谱性质.选取Cu2+,Zn2+,Ca2+,Cr3+,Co2+,Al3+,Mn2+,Ni2+,Ba2+,Hg2+,Fe3+,Cd2+,Mg2+,Pb2+,Li+和Ag+等16种常见金属离子,对2个化合物进行了离子识别实验.结果表明,化合物4a和4b在一定浓度范围内对铜离子均具有良好的选择性识别能力,受常见离子干扰小.由于空间位阻的影响,化合物4a具有比4b更高的灵敏性.更多还原

【Abstract】 Two new quaternary ammonium salts of indolizine derivatives 4a( 1-{ 2-[N’-( 3-cyano-indolizine-1-carbonyl)-hydrazino]-2-oxo-ethyl }-pyridinium; chloride) and 4b( 1-{ 2-[N’-( 3-Cyano-indolizine-1-carbonyl)-hydrazino]-2-oxo-ethyl}-2-methyl-pyridinium; chloride) as fluorescent sensors for Cu2+ were synthesized.The structures of the two compounds were determined by IR,1H NMR,MS and elemental analysis. Their UV and fluorescence spectra were measured. The influences of sixteen metal ions such as Cu2+ ,Zn2+ ,Ca2+ ,Cr3+ ,Co2+ ,Al3+ ,Mn2+ ,Ni2+ ,Ba2+ ,Hg2+ ,Fe3+ ,Cd2+ ,Mg2+ ,Pb2+ ,Li+ and Ag+ on their fluorescence properties were studied. Spectroscopic studies revealed that the two compounds had rather strong affinity toward Cu2+ . The specificities of the two probes toward Cu2+ were determined. Compound 4a nearly no fluorescence intensity changes were observed in emission spectra together with Zn2+ ,Ca2+ ,Co2+ ,Mn2+ ,Ni2+ ,Ba2+ ,Hg2+ ,Cd2+ ,Mg2+ ,Pb2+ ,Li+ and Ag+ ,respectively. Compound 4b nearly no fluorescence intensity changes were observed in emission spectra together with Zn2+ ,Ca2+ ,Cr3+ ,Co2+ ,Al3+ ,Mn2+ ,Ni2+ ,Ba2+ ,Hg2+ ,Cd2+ ,Mg2+ ,Pb2+ ,Li+ and Ag+ ,respectively. However,under identical conditions,the results showed that compounds 4a and 4b had fluorescence quenching together with Cu2+ . So we have developed two new fluorescent sensors( 4a and 4b). They showed high sensitivity and selectivity toward Cu2+ in aqueous solution.更多还原