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4-(S)-[2-(N-甲基)吗啉基 ]-5-(R )-(l-薄荷烷氧基 )-丁内酯结构分析 总被引:1,自引:0,他引:1
N-甲基吗啉对5-(l-薄荷烷氧基)-2(5H)-呋喃酮的光催化不对称共轭加生成了4-(S)-[2-(N-甲基)吗啉基]-5-(R)-(l-薄荷烷氧基)-丁内酯,在四氢呋喃(THF)对比实验、参比物^13CNMR对照及不同溶剂^13CNMR测定的基础上,该新化合物的结构用高分辨率的子核磁共振谱、碳核磁共振谱、质谱、红外光谱及元素分析、旋光度等数据进行了确证。 相似文献
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Qiao Hua Wei Li Jing Han Jing Hua Chen Fang Nan Xiao Shen Liang Zeng Guo Nan Chen 《中国化学快报》2011,22(6):713-716
In this paper,it was found that Ru(H2bpp)2(PF6)2(H2bpp = 2,6-bis(pyrazol-3-yl)pyridine) complex had excellent electrochemical activity at the carbon paste electrode in the buffer solution of Tris-HCl(pH 7.0) with a couple reversible redox peaks at 0.296 V and 0.348 V,respectively.Voltammetry was used to investigate the electrochemical behavior of Ru(H2bpp)2(PF6)2 and the interaction between Ru(H2bpp)2(PF6)2 and bovine serum albumin(BSA).In the present of BSA,the oxidation peak current of Ru(H2bpp)2(PF6)2 complex was decreased linearly and the decrease of oxidation peak current of Ru(H2bpp)2(PF6)2 is proportional to BSA concentration from 0.1 to 2.5 mg/L with a detection limit 0.02 mg/L. 相似文献
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聚[2-(2-氯乙氧基)乙氧基)_x(三氟乙氧基)_(2-x)]磷腈合成和气体分离性能研究 总被引:1,自引:1,他引:0
六氯环三聚磷腈经二次重结晶一次减压升华纯化后,通过真空热开环聚合和亲核取代反应,用不同摩尔比的2-(2-氯乙氧基)乙醇钠和三氟乙醇纳(1∶3;1∶5;1∶6.5)作为亲核取代试剂混取代聚二氯磷腈,再经多次非溶剂沉淀纯化得到目标聚合物聚[(2-(2-氯乙氧基)乙氧基)x(三氟乙氧基)2-x]磷腈.利用31P-NMR监测,以确保得到纯化的聚合物.采用1H-NMR、FT-IR、GPC、DSC、XRD等测试手段对所得到的聚合物进行了结构表征和性能测试,并利用自制的压力法透气性能测定仪测定了这些聚合物的气体渗透系数.结果表明,三氟乙氧基和2-(2-氯乙氧基)乙氧基两种基团已接枝在聚磷腈侧链上,分别得到x值为0.19,0.18和0.08的3种聚[(2-(2-氯乙氧基)乙氧基)x(三氟乙氧基)2-x]磷腈,其玻璃化温度分别为-6.37℃,-12.85℃和-25.68℃,重均分子量为5.4×105,6.8×105和1.5×105,在同样的反应条件下,三氟乙氧基较2-(2-氯乙氧基)乙氧基有更强的竞争取代率.这种混取代聚磷腈较单一取代基的聚三氟乙氧基磷腈结晶度小,在本实验中两种取代基比例适中的聚[(2-(2-氯乙氧基)乙氧基)0.18(三氟乙氧基)1.82]磷腈的结晶度降至10.1%,这种聚合物显示出较高的气体渗透系数,CO2和He的气体渗透系数达到88.9和60.6 barrer,CO2/CH4和He/CH4的选择系数达到24.1和16.4,在天然气行业显露出良好的应用潜力.此外这类聚合物表现出特殊的H2/N2选择性,选择系数在0.2左右,N2的渗透系数为8.5 barrer,因而在合成氨行业显示出特殊的应用潜力. 相似文献
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Recently.anelectrochemiluminescent(ECL)Ptelectrodecoated\vithaRtl(bp})::derivativemoditiedchitosan/silicagelnlelllbralledevelopedbyZhaoalu/'.hasbeedsuccesstlill}appliedinselectivedetectionofoxalicacid.Yangel'I/.-.havediscoveredthatECLetficiencyofRu(phen),='ismuchhigherthanthatofRu(bp}i);=.Thus.wedesignedandsynthesizedanewactivematerialforECLsensor*Ru(phen)=(phenNHCH,Br)(PF,)=.andthesyntheticrouteisshowninFigure1.Figure1.SchemeI\)rs}nthcticrouteofRu(phcn)2(phCll-NIICIl:Br)(I'I:,)2… 相似文献
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Cis-dioxo-metal complex ( NH3CH2CH2NH2 ) 2.5 [ Mo0.5^(V)W0.5^(VI)O2 ( OC6H4O ) 2] 1 was obtained by the reaction of tetra-butyl ammonium hexamolybdotungstate with 1, 2-dihydroxybenzene in the mixed solvent of CH3OH, CH3CN and ethylenediamine,and characterized by X-ray diffraction, UV-vis and EPR analysis. Compared with its analogous complexes (NH3CH2CH2NH2)3[Mo^(V)O2(OC6H40)2] 2 and (NH3CH2CH2NH2)2[W^(VI)O2(OC6H4O)2] 3, the results show that tungsten(VI) is less active in redox than molybdenum (VI) and that the change of the valence induced by substitution of W(VI) for Mo(V) in EMO2(OC6H40)2]n- does not influence the coordination geometry of the complex anion in which the metal center exhibits distorted octahedral coordination with cis-dioxo catechol. The responses to EPR of complexes 1 and 2 are active but complex 3 is silent,and the UV-vis spectra exhibited by the three complexes are obvious different because of the different electronic configuration between the central Mo(V) and W(VI) ions in the complexes.It is noteworthy that complexes 1 and 2 have the similar EPR signal to flavoenzyme, suggesting that the three complexes have the same coordination geometry feature with the co-factor of flavoenzyme. 相似文献
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分别以Fe(Cl O4)3、FeCl3、Fe2(SO4)3作为氧化剂,对3′,4′-乙撑二氧-2,2′∶5′,2″-三噻吩(TET)进行了化学氧化聚合,并研究了聚合条件对聚合物结构和电化学性能的影响。利用红外光谱、紫外光谱、X射线衍射对聚合物进行了表征,采用循环伏安、恒电流充放电等电化学方法研究了聚合物的电化学性能。结果表明:当TET与Fe(Cl O4)3的摩尔比为1∶4,反应温度为18℃,反应时间为12 h时,聚3′,4′-乙撑二氧-2,2′∶5′,2″-三噻吩(PTET)具有更好的共轭结构和电化学性能,导电率可达1.47 S/m,比电容可达133 F/g。 相似文献
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微波法合成一维结构Cd(OH)2螺旋形纳米线 总被引:1,自引:1,他引:0
通过微波辐照法一步合成了长1~3 μm, 直径30~100 nm的螺旋形纳米线, 实验结果表明它是由更细的纳米线组装成束的. 通过改变反应物浓度可以调控螺旋纳米线的直径和长度, 不同的镉盐对产物的结构与形貌有较大的影响. 讨论了螺旋形纳米线可能的形成机理. 相似文献
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应用Gemini型咪唑基离子液体和聚丙烯(PP)熔融共混,制备出Gemini型咪唑基离子液体改性PP,并对改性PP的结构与性能进行了表征与测试.研究结果表明,Br[C14im](CH2)4[C14im]Br添加到PP中后,起到了异相成核的作用,同时使PP晶体结晶度减小;添加离子液体的样品熔融峰温,结晶峰温与纯样相近,同时离子液体也诱导了PP中α晶的生成;Gemini型咪唑基离子液体可以提高PP的抗静电性能,加入量为3 phr时,表面电阻率为8.97×109Ωcm,抗静电性能优良;此外,添加离子液体后样品拉伸强度有所降低,冲击强度有所提高,断裂伸长率有所下降,降低了PP的玻璃化温度,说明离子液体对PP有增塑作用. 相似文献
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报道了一种以钌(Ⅱ)-联吡啶[Ru(bpy)2+3]为催化剂的B-Z化学发光振荡新现象. 研究了B-Z化学发光振荡反应的影响因素, 并对体系的UV光吸收振荡进行了对比研究, 探讨了化学发光振荡反应的可能机理. 结果表明, 该体系的化学发光振荡是由于氧化态的钌(Ⅱ)-联吡啶被振荡反应过程中的强还原性中间体还原所引起的, 化学发光振荡随时间增加呈现周期性变化. 相似文献
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SynthesisandCrystalStructureof(Et_4N)_2[Pd_2(mp)_2(mpH)_2]ShiJi-Cheng;HuangXiao-Ying;WenTing-Bin;DengYu-Heng;ChengChang-Neng;Li?.. 相似文献
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Gholamabbas Chehardoli Mohammad Ali Zolfigol Seyedeh Bahareh Azimi Ebadollah Alizadeh 《中国化学快报》2011,22(7):827-830
Melamine and poly vinylpyrrolidone(PVP) reacted with neat sulfuric acid readily to form two new organic solid acids namely melamine-(H2SO4)3 and PVP-(H2SO4)n.These solid acids were used for the first nitration of bisphenol A as well as other phenols in the presence of NH4NO3.Mono- and di-nitro bisphenol A have been characterized with IR and 1H NMR techniques. 相似文献
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Excellent results have been achieved in the Cu(OAc)2-catalyzed Sonogashira cross-couplings of aryl iodides and activated aryl bromides utilizing TBAF (tetrabutylammonium fluoride) as the base and 4,6-dimethoxypyrimidin-2-amine as the ligand. It is noteworthy that the reaction is conducted under aerobic, solvent-free and palladium-free conditions. 相似文献