共查询到19条相似文献,搜索用时 62 毫秒
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过量C6SCl与丙氨酸在pH 9.11(H_3BO_3-NaOH)缓冲体系中,40℃反应40min,经乙酸乙酯萃取分离后,点样在层析聚酰胺膜上,用甲酸+水(1+1)展开,衍生产物得到很好的分离。斑点经1 mol·L~(-1)NaOH喷雾,紫外灯预光照10 min和干燥后,荧光强度与在4~60×10~(-11)mol范围内的丙氨酸量呈良好线性关系。在滤纸基质上,以Pb(AC)_2作重原子微扰剂,标记产物还能产生较强的室温磷光发射。研究表明,C6SCl不仅能作为氨基酸等的荧光标记物,而且可望作为其室温磷光的标记物。 相似文献
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一种新开发的发光标记物—6—磺酰氯香豆素的合成及性质 总被引:1,自引:1,他引:1
合成、提纯和鉴定了题示这种带反应活性基团的简单香豆素衍生物。碱性条件和足够的光照是其水溶液产生稳定、强荧光的两个必要条件,讨论了光化学反应过程。初步结果表明,可能用作胺、氨基酸等对磺酰氯基团有反应活性的化合物的发光标记物。 相似文献
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通过多种重原子微扰剂和实验条件的选择,成功地实现了C6SCl在数种基质上的RTP发射。发现Pb(Ⅱ)盐是这种RTP发射的最有效的外部重原子微扰剂。在滤纸基质上,以1mol/L Pb(Ac)_2作重原子微扰剂获得了强度高且信/背比亦高的RTP信号,λ_(ex)/λ_(em)=320/496nm。0.2μl点样体积中,C6SCl含量在4~200pmol范围内与RTP信号强度呈良好的线性关系。 相似文献
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苯并香豆素酯类衍生物的合成及荧光性质研究 总被引:3,自引:0,他引:3
以2-羟基-1-萘甲醛为原料,采用改进的Knoevenagel反应合成了苯并香豆素-3-羧酸中间体和4种不同链长的脂肪酯和芳香酯衍生物,采用元素分析和红外光谱对其结构进行了表征.对所有化合物固体粉末的发光性能进行了研究. 相似文献
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Five new coumarin amide derivatives were synthesized with coupling reagent,the structures of which were characterized by IR,1H NMR,13C NMR,MS and element analysis.Their spectral properties were studied in dichloromethane,in N,N-dimethylformamide(DMF) and in solid state.Solvent polarity has less influence on the UV-Vis maximum absorption at about 430 nm.The maximum emission wavelengths change from 464 nm to 474 nm in dichloromethane,from 476 nm to 482 nm in DMF and from 521 nm to 548 nm in solid state,respec... 相似文献
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对酞内酰胺苯磺酰氯与胺类化合物的衍生反应崔同傅承光(河北农业大学食品科学系保定071001)(河北大学理化分析研究中心保定)关键词对酞内酰胺苯磺酰氯,胺类化合物,衍生试剂,衍生反应对酞内酰胺苯磺酰氯(简称Phisyl-Cl)是一种新型高灵敏度荧光(紫... 相似文献
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The methyl coumarins reacted with N‐bromo‐succinimide gave compounds ( a~c ) which on further reacted with various peracetyl sulfhydryl glycose ( 1~3 ) afforded a series of novel coumarin thioglycopyranoside compounds ( 1a~1c, 2a~2c, 3a~3c ). And when used ultrasonic irradiation, this method offered several advantages such as good yields and short reaction time than the silent reaction. All the new compounds were characterized on the basis of the IR, 1H NMR, 13C NMR and elemental analysis. 相似文献
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Four coumarin glycosides(1―4) and four coumarin triazoylglycosides(5―8) were synthesized by phase transfer catalytic glycosylation and copper-catalyzed azide-alkyne cycloaddition(CuAAC) respectively from 4-methyl-7-hydroxyl coumarin(4-methylumbelliferone). The structures were characterized by 1H NMR, MS or IR. The fluorescent properties of the coumarin glycosides and triazoylglycosides were studied in different solvents and compared to those of 4-methyl-7-hydroxyl coumarin. 相似文献
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香豆素衍生物在数种薄层基质上的室温磷光发射特性 总被引:1,自引:0,他引:1
考查了二十多种香豆素衍生物在国产MN-P型和MN-C型微晶纤维素膜,DEAE离子交换膜上的室温磷光发射特性,并与用滤纸作基质时的结果作了比较。在这些基质上,多数衍生物都能发射不同强度的RTP信号,且在其RTP特性间呈现,某些取代基效应。从发光稳定性和信背比考虑,MN-C型比MN-P型膜更适合于这些衍生物的RTP发射。 相似文献
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R. Hekmatshoar Y. Sh. Beheshtiha M. M. Heravi K. Asadollah 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3):703-707
Protonation of the reactive 1:1 intermediate produced in the reaction between triphenylphosphine and dimethyl acetylenedicarboxylate by substituted phenols lead to vinyl triphenylphosphonium salt, which undergoes aromatic electrophilic substitution reaction with the phenolate conjugated base to produce coumarin derivatives. 相似文献
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本文合成了三个噻吩桥联香豆素衍生物,7-N,N-二乙氨基-3-(5-(芘-1-基)噻吩-2-基)-香豆素(Py-Th-NC),7-(N,N-二乙氨基)-3-(4-(5-(7-(N,N-二乙氨基)-香豆素-3-基)噻吩-2-基)苯基)-香豆素(NCTh-Ph-NC)和3-(4-(5-(7-(N,N-二乙氨基)-香豆素-3-基)噻吩-2-基)苯基)-香豆素(NC-Th-Ph-C),分别采用HRMS、1H NMR和IR对其结构进行了表征,并研究了三个化合物的发光性能、电化学性能及热稳定性。结果表明,这些香豆素衍生物具备很好的热稳定性,并在二氯甲烷溶液中显示蓝绿色或绿色荧光。 相似文献