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1.
铕-镧-柠檬酸-1,10-菲咯啉配合物荧光性能研究   总被引:1,自引:0,他引:1  
分别合成了铕与柠檬酸配位的二元配合物,铕、柠檬酸、1,10-菲咯啉配位的三元配合物和掺杂不同量镧的多核三元配合物。经过元素分析、红外分析和热重差热分析等手段确定了配合物的组成与结构。通过荧光光谱及荧光寿命测试了其荧光性能,结果表明当铕与镧掺杂摩尔比为6:4时能得到荧光强度最强且荧光寿命最长的稀土配合。实验结果拟合表明,当铕镧摩尔比在1:9-5:5时,镧离了对铕荧光的敏化程度以指数形式衰减,当铕镧摩尔比在6:4-9:1时,镧离子对铕荧光的敏化程度以线性方式衰减。  相似文献   

2.
铕、钇-苯甲酸-1,10-菲咯啉的合成及荧光性质研究   总被引:1,自引:0,他引:1  
分别合成了稀土(铕、钇)与苯甲酸、1,10-菲咯啉配位的有机稀土羧酸配合物.通过元素分析和红外分析确定了配合物的组成与结构.通过荧光光谱与荧光寿命研究了它们的荧光性质.试验结果表明当钇掺入配合物后,能极大地增强铕的特征荧光,当铕钇的摩尔比为3:7时荧光强度最强,且此时的荧光寿命最长.经拟合后发现,在(铕、钇)-苯甲酸-1,10-菲咯啉配合物中,钇离子对铕荧光的敏化程度随钇含量的降低以指数形式衰减.  相似文献   

3.
报道了邻菲咯啉内胺盐及其稀土配合物的合成及其化学组成,并通过红外光谱,紫外光谱、摩尔电导,差热分析等研究了配体及配合物的有关性质。  相似文献   

4.
研究了以菲咯啉为原料,经氧化,芳醛缩合,金属离子络合等反应合成新型金属有机三阶有机非线性光学化合物[2-(1H-咪唑[4,5-f][1,10]菲咯啉-2-基-κN7,κN8)苯酚]双(1,10-菲咯啉-κN1,κN10)镍(2+)的工艺过程.对氧化与芳醛缩合两步反应进行了工艺优化,氧化反应的较佳工艺条件:菲咯啉和溴化钠之间的摩尔比为1:4,反应温度为110℃,反应时间4 h,氧化反应收率由40%提高到92%.缩合反应的较佳工艺条件:一锅煮的加料方式,反应温度80℃,酮醛比1:1.2,反应时间2 h,酮铵比1:20,缩合反应收率由70%提高到93.1%.  相似文献   

5.
6.
在0.2 mol.L-1的B-R(pH5.0)缓冲溶液中,运用荧光光谱法研究了咪唑并邻菲咯啉铁配合物([Fe(phen)2IP].3Cl O4.2 H2O,phen=邻菲咯啉,IP=咪唑并邻菲咯啉)与鲑鱼精DNA的相互作用。实验结果表明,[Fe(phen)2IP]3+与DNA的作用方式为嵌插结合。以[Fe(phen)2IP]3+为杂交指示剂制成了DNA荧光光纤传感器,检测了与固定在光纤上的探针DNA互补的靶DNA。实验表明,检测的线性范围为1.25×10-8~1.50×10-7mol.L-1,检测限为1.35×10-9mol.L-1。  相似文献   

7.
分别考察了钌(Ⅱ)-Ⅲ(1,10-菲咯啉)和硫脲在KMnO4、KBrO3、K2S2O8、I2、KIO4、 Ce(SO4)2存在下的化学发光反应情况,发现只有KMnO4能氧化硫脲和钌(Ⅱ)-Ⅲ(1,10-菲咯啉) 而发光。体系的化学发光强度与硫脲的浓度在2.0×10~(-8)~1.0×10~(-5)mol·L~(-1)范围内呈线性关系,方法的检出限为2.0×10~(-8)mol·L~(-1),平行测定10次相对标准偏差为1.1%。该法用于分析测定白葡萄酒中的硫脲,平均回收率为96.3%~103%获得满意结果。  相似文献   

8.
合成了邻菲罗啉衍生物2-苯基咪唑[4,5-f]1,10-邻菲罗啉(PIP),以其作为第二配体,并以柠檬酸(H2Cit)作为第一配体,合成了新的稀土三元有机配合物。通过红外光谱、紫外光谱和元素分析等技术表征了其组成。并考察了其荧光性能。结果表明,配合物在305nm紫外光激发下可发出稀土离子的特征荧光。  相似文献   

9.
分别考察了钌(II)-III(1,10-菲咯啉)和硫脲在KMnO4、KBrO3、K2S2O8、I2、KIO4、Ce(SO4)2存在下的化学发光反应情况,发现只有KMnO4能氧化硫脲和钌(II)-III(1,10-菲咯啉)而发光.体系的化学发光强度与硫脲的浓度在2.0×10-8~1.0×10-5mol·L-1范围内呈线性关系,方法的检出限为2.0×10-8mol·L-1,平行测定10次相对标准偏差为1.1%.该法用于分析测定白葡萄酒中的硫脲,平均回收率为96.3%~103%获得满意结果.  相似文献   

10.
报道了邻菲咯啉内胺盐及其稀土配合物的合成及其化学组成,并通过红外光谱,紫外光谱,摩尔电导,差热分析等研究了配体及配合物的有关性质。  相似文献   

11.
论文以含稀土氧化物的萤石为研究对象,利用浸出稀土氧化物过程中柠檬酸可以抑制萤石的溶解,达到使稀土和萤石分离的目的.研究结果显示:随着柠檬酸浓度的增加,氟化钙被抑制的作用有明显的提高,当柠檬酸浓度增加到0.25mol·L^-1时氟化钙的溶出率比无柠檬酸时降低了73%,而稀土的浸出率随着柠檬酸浓度的增加而增加,浸出过程机理为主要为柠檬酸与浸出的稀土形成配合物,使得稀土更容易被浸出.实验所得到的浸出条件是:盐酸浓度为3mol·L^-1,柠檬酸浓度为0.25mol·L^-1,液固比为10:1,浸出时间为1h,此条件下稀土氧化物的浸出率达到92.89%,而氟化钙的浸出率为13.6%.  相似文献   

12.
Two novel ligands named 4-styrylpyridine-2,6-dicarboxylic acid (4-SPDA) and 4-(4-(2-(2, 6-dicarboxypyridin-4-yl)-vinyl)styryl)pyridine-2,6-dicarboxylic acid(DSPDA) and their complexes with Tb(Ⅲ) were synthesized and characterized by infrared spectrometry, 1H nuclear magnetic resonance, elemental analysis and gas chromatograph-mass spectrometry. The ligand synthetic route was optimized. The fluorescence properties of the complex in solid state, in different kind of solvents and in solutions with different pH values were investigated in detail. The results show that the yields of DSPDA and 4-SPDA reach over 78% by Wittig-Horner reaction and other eight pyridine-2, 6-dicarboxylic acid derivatives with different substituents on pyridine ring, and their complexes with Tb(Ⅲ) are also obtained. The fluorescence intensities of the complexes with electron-donating groups are more intense than those of the complexes with electron-withdrawing groups on pyridine ring; fluorescence intensities of the complexes are the strongest in neutral solution (pH=7), and the less the dipole moment of solvent molecule is, the stronger the fluorescence intensity is. It is found that the two ligands (4-APDA and DSPDA) are the good sensitizers for Tb(Ⅲ) ion.  相似文献   

13.
三脚架型配体、配合物的合成及荧光性质   总被引:1,自引:0,他引:1  
为了进一步研究配体结构对稀土离子配位行为的影响,合成了以N为中心的三足配体——2,2′,2″-三(2-苯胺基甲酰基苯氧基)三乙胺(L)及其稀土硝酸盐配合物.试验表明,在合成三(2-氯乙基)胺盐酸盐时,应先用适当的溶剂(如苯)溶解三乙醇胺盐酸盐,然后向其中缓慢滴加氯化亚砜,并在合成N-苯基水杨酰胺的过程中,用DCC作脱水剂,效果较好.该合成方法明显降低了氯化亚砜的挥发,减少了原料损失,使操作条件更温和。收率可达80%以上:在室温下.铽配合物表现出Tb^3+的特征荧光发射峰.  相似文献   

14.
Two novel ligands named 4-styrylpyridine-2,6-dicarboxylic acid (4-SPDA) and 4-(4-(2-(2, 6-dicarboxypyridin-4-yl)- vinyl)styryl)pyridine-2,6-dicarboxylic acid(DSPDA) and their complexes with Tb(Ⅲ) were synthesized and characterized by infrared spectrometry, 1H nuclear magnetic resonance, elemental analysis and gas chromatograph-mass spectrometry. The ligand synthetic route was optimized. The fluorescence properties of the complex in solid state, in different kind of solvents and in solutions with different pH values were investigated in detail. The results show that the yields of DSPDA and 4-SPDA reach over 78% by Wittig-Horner reaction and other eight pyridine-2, 6-dicarboxylic acid derivatives with different substituents on pyridine ring, and their complexes with Tb(Ⅲ) are also obtained. The fluorescence intensities of the complexes with electron-donating groups are more intense than those of the complexes with electron-withdrawing groups on pyridine ring; fluorescence intensities of the complexes are the strongest in neutral solution (pH=7), and the less the dipole moment of solvent molecule is, the stronger the fluorescence intensity is. It is found that the two ligands (4-APDA and DSPDA) are the good sensitizers for Tb(Ⅲ) ion.  相似文献   

15.
实验发现,在散射光中Fe(Ⅲ)-5-硝基-1,10-菲啉配合物能发生显著的光还原反应,但在盐酸介质中则可阻止Fe(Ⅲ)-5-硝基-1,10菲啉配合物的生成。并研究了Fe(Ⅲ)-5-硝基-1,10-菲啉配合物的光化学还原反应作用,建立了测定铁价态的分析方法。此法用于铁矿石中铁的价态分析,结果与标准值一致  相似文献   

16.
1Introduction Uptonow,manyproton transfercomplexesofaro maticcarboxylicacidsandLewisbaseshavebeen reported[19].Theproton transferfromorganicacidsto aminesmaytakeplacereadilywithaverylowactivation energyincontrastwiththeattackoftheaminetothecar bonylcarbon…  相似文献   

17.
In order to make full use of salt lake magnesium resources and improve the strength of the thermal decomposed magnesium oxychloride cement(TDMOC), the effects of citric acid on the hydration process and mechanical properties of TDMOC was studied. The hydration heat release at initial 24 h and strengths at 3, 7, and 28 days of TDMOC specimens were conducted. The hydration products and paste microstructure were analyzed by XRD, FT-IR and SEM, respectively. The results showed that citric acid can not only reduce the 24 h hydration heat release and delay the occurring time of second peak of TDMOC, but also produce more 5Mg(OH)2·MgCl 2·8H2O and less Mg(OH)2 in hydration process of TDMOC. More perfect and slender crystals were observed in the microstructure of the TDMOC pastes with citric acid. The results demonstrated that citric acid as an additive of TDMOC can decrease the hydration heat release and increase the compressive strength and flexural strength of TDMOC. The possible mechanism for the strength enhancement was discussed.  相似文献   

18.
镧、铈羧酸盐配合物的红外光谱分析   总被引:2,自引:0,他引:2  
对镧、铈与环己基甲酸及2-乙基己酸的5种配合物单晶进行了红外光谱分析,结果表明,配合物中的羧基可能采取双龄螯合、双齿桥式或三齿螯合桥式等配位形式。  相似文献   

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