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Two chiral fluorescent receptors 1 and 2 based on (R)-1,1‘-binaphthylene-2,2‘-bisthiourea were synthesized, and their chiral recognition properties for enantiomeric mandelate anions were studied by fluorescence spectra and molecular modeling. Addition of the L- and D-mandelate anions caused considerable fluorescent increases in the fluorescent intensity of the host solution. The L-enantiomer can enhance the fluorescence intensity of 1 much more than the D-enantiomer can do, and 1 shows a better enantioselective recognition ability than 2. 相似文献
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丙烯酸酯三元共聚物负载双硫铂配合物的合成及催化性能 总被引:2,自引:0,他引:2
二丙烯酸-1,4-丁二酯,丙烯酸甲酯,丙烯酸β-氯乙酯三元共聚,制得交联型丙烯酸酯三元共聚物。再依次与3,6-二硫杂1-辛醇,氯亚铂酸钾反应,得到二种新型的丙烯酸酯三元共聚物负载的双硫铂配合物。该配合物对1-十二碳烯,1-癸烯,苯基烯丙醚与三乙氧基硅烷的硅氢加成反应具有较高的催化活性。 相似文献
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Novel amphiphilic fluorescent graft copolymer (PVP-PyAHy) was successfully synthesized by the free radical copolymerization of hydrophobic monomer N-(1-pyrenebutyryl)-N'-acryloyl hydrazide (PyAHy) with hydrophilic precursor polymers of vinyl-functionalized poly(N-vinylpyrrolidone) (PVP) in DMF. The copolymer is amphiphilic and has intrinsic fluorescence. FT-IR, ^1H-NMR, TEM, gel permeation chromatography-multi-angle laser light scattering, UV-Vis spectroscopy and fluorescence spectroscopy were used to characterize this copolymer. The TEM observation shows that the copolymer PVP-PyAHy forms micelles in aqueous solution. Results of fluorometric measurements illustrate that the critical micelle concentration (CMC) value of PVP-PyAHy in aqueous solution is about 0.90 mg/mL. To examine the encapsulation ability of the copolymer in aqueous media, methyl yellow was employed as a model hydrophobic agent. The loading level of the polymer to methyl yellow is 8.8 mg/g. The cytotoxicity assays for Madin Darby Canine Kidney (MDCK) cells shows good biocompatibility of PVP-PyAHy in vitro. These results suggest the potential of this copolymer PVP-PyAHy as drugs delivery carrier and fluorescent tracer. 相似文献
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手性氮丙啶试剂的合成 总被引:3,自引:0,他引:3
L-缬氨酸和L-异亮氨酸经NaBH4还原得到相应的氨基醇化合物1(a,b);再经与对甲苯磺酰氯反应得到3-甲基-2-对甲苯磺酰氨基-丁醇对甲苯磺酸酯2a和3-甲基-2-对甲苯磺酰氨基-戊醇对甲苯磺酸酯2b;化合物2(a,b)在强碱条件下经环化反应得两种手性氮丙试剂3a和3b,对中间体2的合成条件进行了探讨,并测定了手性氮丙啶试剂的旋光性,所有中间体和手性氮丙啶试剂均经元素分析、^1HNMR,MS等证实了它们的结构和组成。 相似文献
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含双蒽基团酰胺受体分子的合成及阴离子识别研究 总被引:5,自引:0,他引:5
合成了一种新型的带有双蒽基团的酰胺阴离子受体B.用荧光光谱、紫外-可见吸收光谱以及核磁共振氢谱研究了B与Cl-,Br-,I-及对硝基酚氧阴离子的相互作用.结果表明,B与Cl-,Br-,I-等阴离子无识别作用,而与对硝基酚氧阴离子有较好的选择性识别能力,其络合比为1∶1.利用荧光发射强度和吸光度的变化分别计算出主体B与客体相互作用的络合常数KS分别为(1.24±0.07)×105和(1.27±0.18)×105,并对主体分子B与客体之间的相互作用进行了讨论. 相似文献