封面文章
化學(xué)
封面介紹:《科技導(dǎo)報(bào)》2015年第13期13-16頁刊登了農(nóng)榮等的研究論文“LED用黃綠色熒光粉LiZnPO4︰Mn2+,Al3+的合成及Al3+敏化發(fā)光研究”。以廉價(jià)的錳(II)離子代替昂貴的稀土離子,用高溫固相法合成了Li1-xZn0.9-xPO4︰Mn0.1,Alx系列的熒光粉,樣品具有LiZnPO4的結(jié)構(gòu)。用熒光發(fā)射光譜及激發(fā)光譜表征了樣品的發(fā)光性能。研究結(jié)果表明,Al3+的最佳摻雜量為3%,所對應(yīng)的熒光粉樣品為Li0.97Zn0.87PO4︰Mn0.1,Al0.03。Al3+的最佳摻雜量樣品的發(fā)光強(qiáng)度是未摻Al3+樣品的3.98倍,說明在LiZnPO4基質(zhì)中Al3+對Mn2+的發(fā)光具有增敏作用,該樣品為黃綠色的熒光粉,在紫外線激發(fā)LED的領(lǐng)域具有潛在的應(yīng)用前景。本期封面圖片展示的是用高溫固相法合成的LiZnPO4︰Mn,Al熒光粉,圖片由農(nóng)榮提供。
LED用黃綠色熒光粉LiZnPO4︰Mn2+,Al3+的合成及Al3+敏化發(fā)光研究
農(nóng)榮,黃映恒,盧科,等
為了獲得可用于發(fā)光二極管(LED)的新型黃綠色熒光粉,用高溫固相法合成了Li1-xZn0.9-xPO4:Mn0.1,Alx系列的熒光粉。用 XRD 表征并分析了樣品,獲悉樣品具有LiZnPO4的結(jié)構(gòu)。用熒光發(fā)射光譜及激發(fā)光譜表征了樣品的發(fā)光性能,討論了 Al3+摻雜對LiZnPO4︰Mn,Al熒光粉發(fā)光性能的影響。結(jié)果表明:Al3+摻雜量對激發(fā)及發(fā)射光強(qiáng)度的影響均為開口向下、有極值的拋物線,Al3+的最佳摻雜量為3%,對應(yīng)樣品是Li0.97Zn0.87PO4︰Mn0.1,Al0.03;Al3+最佳摻雜量樣品的發(fā)光強(qiáng)度是未摻Al3+樣品的3.98倍,說明在LiZnPO4基質(zhì)中Al3+對Mn2+的發(fā)光具有增敏作用;Al3+的摻入只影響Mn2+的發(fā)光強(qiáng)度,不影響Mn2+的發(fā)光模式。Li0.97Zn0.87PO4︰Mn0.1,Al0.03的色坐標(biāo)值表明,該樣品為黃綠色熒光粉,其在紫外線激發(fā)LED領(lǐng)域具有潛在的應(yīng)用前景。
無機(jī)化合物;磷酸鹽;熒光粉;發(fā)光;光學(xué)材料;無機(jī)化合物;磷酸鹽;熒光粉;發(fā)光;光學(xué)材料
來源出版物:科技導(dǎo)報(bào),2015,33(13): 13-16聯(lián)系郵箱:廖森,liaosen@gxu.edu.cn
封面介紹:On page 1001,ZHENG et al developed a real-time PCR coupled with invader assay for accurate single nucleotide polymorphism genotyping through optimizing the amount of Flap endonuclease 1(FEN1 enzyme)and wild type detection probe. The proposed method was high specific,simple,non-polluting,short time-consuming and low cost.
實(shí)時(shí)熒光聚合酶鏈?zhǔn)椒磻?yīng)偶聯(lián)高特異性核酸侵入反應(yīng)檢測單核苷酸多態(tài)性
鄭夢琳,齊謝敏,童歡,等
摘要:建立了實(shí)時(shí)熒光聚合酶鏈?zhǔn)椒磻?yīng)(PCR)偶聯(lián)高特性核酸侵入反應(yīng)檢測單核苷酸多態(tài)性(SNP)的方法。優(yōu)化了體系中flap核酸內(nèi)切酶1(FEN1酶)和野生型檢測探針等用量,確定了最佳反應(yīng)條件,即FEN1酶用量為1.5 U,野生型檢測探針用量為0.125 μmol/L,0.5 μmol/L Invader突變型檢測探針,各0.25 μmol/L通用野生型(VIC)和突變型(FAM)熒光共振轉(zhuǎn)移發(fā)卡探針,顯著降低了野生型樣本和突變型樣本背景信號,避免了背景信號對檢測結(jié)果分型的干擾。采用本方法對編碼乙醛脫氫酶2(ALDH2)基因ALDH2*2位點(diǎn)21例樣本、細(xì)胞色素P450 2C19基因CYP2C19*2和CYP2C19*3位點(diǎn)各19例樣本進(jìn)行分型檢測,結(jié)果表明,ALDH2*2位點(diǎn)GG純合10例,GA雜合8例,AA純合3例;CYP2C19*2位點(diǎn)GG純合9例,GA雜合8例,AA純合2例;CYP2C19*3位點(diǎn)GG純合18例,GA雜合1例。使用焦磷酸測序進(jìn)行驗(yàn)證,兩種方法檢測結(jié)果一致。本方法特異性好、操作簡便、耗時(shí)短、成本低,可實(shí)現(xiàn)對SNP單管閉管無污染的分型檢測。
關(guān)鍵詞:實(shí)時(shí)熒光PCR;核酸侵入反應(yīng);單核苷酸多態(tài)性;乙醛脫氫酶2基因;細(xì)胞色素P450 2C19基因
來源出版物:分析化學(xué),2015,43(7): 1001-1008聯(lián)系郵箱:宋沁馨,songqinxin@sina.com
來源出版物:Chinese Chemical Letters,2015,26(7): 839-842
聯(lián)系郵箱:CHEN Chuan-feng,cchen@iccas.ac.cn
Capacitance performances of supramolecular hydrogels based on conducting polymers
Dai Ting-yang,Tang Rong,Yue Xiao-xiao,et al.
Abstract: The capacitance performances of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT-PSS)supramolecular hydrogels have been investigated systematically. The materials show a specific capacitance of 67 F/g and display excellent rate capability at the scan rate as high as 5000 mV/s in the cyclic voltammogram measurements,accompanied by good cycle stability. On the basis of the measurements of the microscale morphologies,specific areas and electrical conductivities,the mechanisms for the improvement of the electrochemical properties are discussed and ascribed to the novel porous microstructures of the hydrogels and the synergetic effect of the rigid PEDOT and soft PSS components. Furthermore,polyaniline(PAn)is compounded with the PEDOT-PSS hydrogels through an interfacial polymerization process,endowing the hydrogel materials with a higher specific capacitance of 160 F/g at the scan rate of 5000 mV/s. The significance of this work lies in the demonstration of a novel method to solve the problems of conducting polymers in electrochemical applications.
Keywords: Conducting polymers; Hydrogels; Capacitance performances; Rate capability;Supercapacitors
來源出版物:Chinese Journal of Polymer Science,2015,33(7): 1018-1027聯(lián)系郵箱:Yun Lu,yunlu@nju.edu.cn
焦?fàn)t煤氣二氧化碳重整制合成氣中La0.6Sr0.4NixCo1-xO3鈣鈦礦催化劑的合成、表征和催化性能研究
朱秋樺,程紅偉,鄒星禮,等
摘要:采用溶膠凝膠法制備了 La0.6Sr0.4NixCo1-xO3鈣鈦礦催化劑,并測試了該催化劑在焦?fàn)t煤氣CO2重整反應(yīng)中的性能.通過X射線衍射、N2吸附脫附、程序升溫還原、掃描電鏡、透射電鏡和熱重-微分掃描量熱等方法對催化劑進(jìn)行了表征。結(jié)果表明,溶膠凝膠法合成的 La0.6Sr0.4NixCo1-xO3催化劑形成了鈣鈦礦結(jié)構(gòu)的固溶體。著重考察了鈣鈦礦催化劑焙燒溫度和 A位 Ni的摻雜含量對其催化性能和反應(yīng)后積碳的影響。結(jié)果表明:La0.6Sr0.4NixCo1-xO3鈣鈦礦催化劑在反應(yīng)中生成了活性金屬Ni,Co顆粒和La2O2CO3,這些組分對催化劑的活性和穩(wěn)定性起關(guān)鍵性的作用,并且能夠抑制積碳的形成;焦?fàn)t煤氣中的富氫氣體具有抑制甲烷裂解反應(yīng)發(fā)生的作用,從而減少催化劑的積碳。
關(guān)鍵詞:合成氣;催化活性;鈣鈦礦;干重整;焦?fàn)t煤氣;積碳
來源出版物:催化學(xué)報(bào),2015,36(7): 915-92聯(lián)系郵箱:程紅偉,hwcheng@shu.edu.cn
磺酸功能化的離子液體型多金屬氧酸鹽的光色性能
李園園,楊春
摘要:發(fā)現(xiàn)磺酸功能化離子液體型多金屬氧酸鹽(IL-POM)具有可逆光色性質(zhì),并在紫外光激發(fā)下,詳細(xì)考察了[PyPS]nH3-nPW12(n=1,3)(PyPs : 吡啶丙磺酸鹽)、[PyPS]4SiW12、[TEAPS]3PW12(TEAPS : 3-(三乙胺基)丙磺酸鹽)等樣品的光致變色行為。結(jié)果表明,磺酸化的IL-POM是一類弱的電荷轉(zhuǎn)移多金屬氧酸鹽,但在紫外光激發(fā)下有機(jī)陽離子和POM陰離子間可以發(fā)生電子相互作用,實(shí)現(xiàn)W6+→W5+的還原,并形成穩(wěn)定的電荷轉(zhuǎn)移復(fù)合物,導(dǎo)致樣品顯色。鎢磷酸鹽的光色性大大強(qiáng)于鎢硅酸鹽,且空氣中避光放置可以消色。但樣品容易疲勞,著色-褪色重復(fù)性不好。對光色機(jī)理的研究顯示,有機(jī)陽離子中的—SO3H基團(tuán)作為電子供體參與了變色過程。揭示了磺酸基團(tuán)的電子供體作用,為設(shè)計(jì)電荷轉(zhuǎn)移多金屬氧酸鹽和POM基光色材料提供了新的思路。
關(guān)鍵詞:多金屬氧酸鹽;離子液體;磺酸功能化;光色性;機(jī)理;
來源出版物:應(yīng)用化學(xué),2015,32(7): 808-815
聯(lián)系郵箱:楊春,yangchun@njnu.edu.cn
封面介紹:在紫外光的照射下,安息香作為一種穩(wěn)定且易于制備的α-羥基酮,易發(fā)生Norrish I型光裂解反應(yīng)產(chǎn)生苯甲酰基自由基。該研究以α,α-二芳基烯丙醇為底物,通過苯甲酰基自由基加成/1,2-芳基遷移串聯(lián)過程,實(shí)現(xiàn)烯烴的雙官能團(tuán)化;同時(shí),在溫和、環(huán)境友好條件下,提供了一種新穎的光化學(xué)方法來有效制備1,2,4-三芳基-1,4-丁二酮衍生物。
紫外光介導(dǎo)合成1,2,4-三芳基-1,4-丁二酮反應(yīng)研究
黃宏麗,高國林,楊超,等
摘要:在紫外光照射下,安息香發(fā)生裂解產(chǎn)生苯甲?;杂苫c α,α-二芳基烯丙醇的雙鍵發(fā)生自由基加成并伴隨1,2-芳基遷移,實(shí)現(xiàn)了雙鍵的雙官能團(tuán)化;同時(shí)該反應(yīng)為有效合成1,2,4-三芳基-1,4-丁二酮化合物提供了一條新途徑。該方法具有操作簡單、反應(yīng)條件溫和等優(yōu)點(diǎn)。
關(guān)鍵詞:紫外光;1,2-芳基遷移;雙官能團(tuán)化;1,2,4-三芳基-1,4-丁二酮
來源出版物:影像科學(xué)與光化學(xué),2015,33(4): 265-274
聯(lián)系郵箱:楊超,xyyang@hit.edu.cn
封面介紹:The cover image presents an overview of a comparative study in which the performance of twelve DFT methods in the characterization of three trivalent U complexes was evaluated. On page 1283,DING Wan-jian et al. demonstrate that a properly selected DFT method may be used to study the geometry,the electronic structure,and the thermodynamics of low valent uranium complexes,and the results provide timely information for the application of DFT methods in studying low valent actinide molecular systems.
采用12種密度泛函理論方法表征三種三價(jià)鈾復(fù)合物
丁萬見,方維海,柴之芳,等
摘要:比較了BP86、PBE、B3LYP、B3PW91、BHandHLYP、PBE0、X3LYP、CAM-B3LYP、TPSS、M06L、M06和M06-2X等12種采用了廣義梯度近似(GGA、hybrid GGA、meta-GGA和hybrid meta-GGA)的密度泛函理論(DFT)方法在三個(gè)三價(jià)鈾復(fù)合物表征中的應(yīng)用. 研究模型采用鈾復(fù)合物催化 CO2和 CS2官能團(tuán)化反應(yīng)中的三個(gè)中間體(Tp*)2U-η1-CH2Ph(Cpd2),(Tp*)2U-κ2-O2CCH2Ph(Cpd3)和(Tp*)2U-κ2-S2CCH2Ph(Cpd4). 研究發(fā)現(xiàn),B3LYP和B3PW91在幾何結(jié)構(gòu)和電子結(jié)構(gòu)方面優(yōu)于其它方法。基于分子軌道理論的MP2方法在Cpd2和Cpd3的表征中給出與DFT方法相近的結(jié)果,而在Cpd4的表征中表現(xiàn)出較大的差異。這可能是由于同樣是單參考態(tài)方法的MP2捕捉到了與DFT方法不同的電子結(jié)構(gòu)。同時(shí),通過對比分別采用小核贗勢(5f-in-valence)和大核贗勢(5f-in-core)基組處理鈾原子的計(jì)算結(jié)果,發(fā)現(xiàn)對測試的模型體系,兩種處理方法可獲得相近的熱力學(xué)能量。與以往主要關(guān)注高價(jià)態(tài)錒系復(fù)合物的處理方法的評估工作不同,本項(xiàng)工作適應(yīng)逐漸增加的對低價(jià)態(tài)錒系分子體系的研究的需求,對12種常用的密度泛函理論方法在低價(jià)態(tài)錒系復(fù)合物研究中的應(yīng)用進(jìn)行了評估,期望為處理類似體系的研究工作提供參考。
關(guān)鍵詞:密度泛函理論;三價(jià)鈾復(fù)合物;錒系計(jì)算化學(xué);QTAIM
來源出版物:物理化學(xué)學(xué)報(bào),2015,31(7): 1283-1301聯(lián)系郵箱:丁萬見,dingwanjian@bnu.edu.cn
封面介紹:Sugar amino acids(SAAs)are carbohydrate derivatives bearing both amino and carboxylic acid functional groups. The biological potential of naturally occurring SAAs has extracted many organic chemists to discover their synthetic analogues. Herein,we report a concise method to access two novel SAAs starting from the commercially available glycals.
新型糖氨基酸類化合物的合成研究
汪學(xué)彬,王曉麗,胡靜,等
摘要:糖氨基酸(sugar amino acids,SAAs)是一類同時(shí)含有氨基和羧基的糖類衍生物,具有糖和氨基酸的結(jié)構(gòu)特征和化學(xué)反應(yīng)特性,常作為多功能合成砌塊用于組合化學(xué)的研究、糖模擬物和多肽模擬物的構(gòu)建等。因此,該類化合物的設(shè)計(jì)與合成受到國內(nèi)外化學(xué)家的持續(xù)關(guān)注。在本文中,我們發(fā)展了一種簡單、高效的合成新型糖氨基酸的方法,從廉價(jià)易得的3,4,6-O-三乙酰基-D-葡萄糖烯和3,4,6-O-三乙?;?D-半乳糖烯出發(fā),在硝酸鈰銨(CAN)的作用下通過一步自由基加成反應(yīng)分別得到2-C-二羧酸酯類化合物gluco-2和galacto-2,再經(jīng)過脫羧、脫乙酰、碘代、疊氮化鈉取代和一鍋法還原氨化反應(yīng),以最短直線步驟6步實(shí)現(xiàn)了糖氨基酸gluco-7(總收率34%)和galacto-7(總收率19%)的合成。所有合成的化合物均經(jīng)過IR,1H NMR,13C NMR和HRMS的表征。
關(guān)鍵詞:糖氨基酸;糖烯;自由基加成;一鍋法反應(yīng);合成
來源出版物:化學(xué)學(xué)報(bào),2015,73(7): 699-704聯(lián)系郵箱:尹健,jianyin@jiangnan.edu.cn
封面介紹:The cover picture shows the first examples for the synthesis of coumarins via direct couplings of alcohols with C-7 coumarin halides. Such reactions proved to be much more difficult than similar couplings with simple substituted phenyl halides,especially when the alcohols are sterically congested as encountered in this work. En route to the first synthesis of the two long-known naturally occurring coumarins,several broadly employed coupling protocols were examined for the given substrates without success. In the end,the desired products were obtained by performing the reaction in xylene at 160°C in the presence of CuI/Cs2CO3/1,11-penanthroline. More details are discussed in the article by Wu and Liu et al. on page 723-728.
Synthesis of Two Coumarins Isolated from Aster praealtus
WANG Bo,CHEN Hui-jun,WU Yi-kang,et al.
Abstract: Two coumarins isolated from Aster praealtus were synthesized via a direct coupling of the corresponding cyclohexyl carbinol with a coumarin-derived aryl bromide or iodide,a very difficult etherification due to the excess steric congestion around the carbinol and the low reactivity of the aryl halide that frustrated many seemingly feasible protocols. Unequivocal1H and13C NMR data for these compoundswere thus made available for the first time. Uncertainty and errors in1H and13C NMR data in previous reports are also eliminated and revealed,respectively.
Keywords: alcohols; condensation; natural products; stereochemistry; ethers
來源出版物:Chinese Journal of Chemistry,2015,33(7): 723-728聯(lián)系郵箱:WU Yi-kang,yikangwu@sioc.ac.cn
軟骨藻酸作用蛋白質(zhì)的親和毛細(xì)管電泳篩選
王曉倩,高鐵,洪專,等
摘要:基于親和毛細(xì)管電泳,定性比較了血漿、腸道及細(xì)胞線粒體中所選的9種重要功能蛋白質(zhì)與神經(jīng)毒性生物毒素——軟骨藻酸(domoic acid,DA)的相互作用。以DA淌度比變化量ΔM與蛋白質(zhì)濃度L作圖,根據(jù)斜率值大小可比較DA與蛋白質(zhì)作用的相對強(qiáng)弱。結(jié)果如下:可與DA相互作用的有6種蛋白質(zhì),作用強(qiáng)弱為:人凝血酶 > 細(xì)胞色素C≈胰蛋白酶≈免疫球蛋白E(Ig E)≈核糖核酸酶A > λ核酸外切酶;而鐵蛋白、轉(zhuǎn)鐵蛋白、凝集素與DA未表現(xiàn)出相互作用和親和力。實(shí)驗(yàn)表明,親和毛細(xì)管電泳具有高效、快速、所需樣品量低的優(yōu)點(diǎn),可用于DA作用靶蛋白的篩選,為DA的毒性機(jī)制研究和毒性防護(hù)提供基礎(chǔ)信息。
關(guān)鍵詞:親和毛細(xì)管電泳;軟骨藻酸;蛋白質(zhì);相互作用
來源出版物:色譜,2015,33(7): 673-677
聯(lián)系郵箱:屈鋒,qufengqu@bit.edu.cn
Synthesis and structures of triptycene-derived Tr?ger's base molecular clips
LI Peng-fei,HAN Ying,CHEN Chuan-feng ,et al.
A series of triptycene-derived Tr?ger's bases with molecular clip shaped structures have been conveniently and efficiently synthesized by one-pot condensation of corresponding amino-substituted triptycenes with paraformaldehyde in the presence of trifluoroacetic acid,and their structures have been characterized by NMR,MALDI-TOF MS spectra,elemental analyses and single-crystal X-ray diffraction.
Triptycene; Tr?ger's base; Molecular clip; Synthesis