简介:Phasebehaviorofbinarysystemofbromobenzene-chlorobenzene(C6H_5Br-C_6H_5Cl)confinedinSBA-15andMCM-41(porediameter8nm,3.8nm,respectively)hasbeeninvestigatedbymeansofdifferentialscanningcalorimetry(DSC).PhasediagramofC_6H_5Br-C_6H_5ClsystemconfinedinSBA-15isatypeofthecompletemisciblebothinliquidandsolidstate,thesamephasebehaviorasthebulksystem.However,thephasediagramcomprisesonlyoneboundaryline,whichisshifteddown22-36Kwithrespecttothebulksystem.C_6H_5Br,C_6H_5ClorthemixturewithinnanoporesofMCM-41isnonfreezing.ThedifferentphasebehaviorofthesystemconfinedinSBA-15andMCM-41isthoughtmainlyduetotherelativesizeofporetomolecule.
简介:Thesynthesisofanewtypeofhetero-macrocyclicpolyether2,3-henzo-1,4,7,13-tetraoxa-10-selenacyclopentadeca-2-eneisdeseribed.
简介:Twonew15-memhoredfimctionalizedmacrocycles,dioxo-polyazacydoalkaneswiththreependantacetatogroups,havebeensynthesizedbythecondensationreactionofDTPAdianhy-dride(DTPA=diethylenetrlamlnepentaaceticacid)with1,2-di-amlnopropane,(15-DTPA-1,2-pn),or1,2-diaminocydohex-ane,(15-DTPA-1,2-cy).Theirlanthanidecomplexes[Ln(15-DTPA-1,2-pn)(H2O)]2[Ln=Eu(1),Gd(2)]and[Ln(15-DTPA-1,2-cy)(H2O)]2[Ln=Eu(3),Gd(4)]werealsopre-pared.SinglecrystalX-raydiffractionanalysesofcomplexes2and4showthattheyhavedimericstructuresinsolidstate;eachmetalionisnine-coordinatedinadistortedtricapped-trig-onalprism.Incomplex4,thecoexistenceoftwodiastereoiso-mericmoleculesinthecrystallatticewasobserved.
简介:含有ONO给体原子的N-邻甲氧基苯甲酰基水杨酰肼配体与[VO(acac)2]在乙醇中反应得到钒(V)酰配合物VO[(C15H12N2O4)(OC2H5)].标题化合物晶体属三斜晶系,空间群Pī,晶胞参数:a=0.89411(5)nm,b=1.0063(2)nm,c=1.0392(2)nm,α=110.171(7)°,β=95.219(3)°,γ=93.822(2)°;V=0.8692(2)nm3,Z=2,R1=0.0513,wR=0.1532.研究结果表明:钒原子具有扭曲的四方锥配位构型,钒酰氧原子处在锥顶位置,配体的3个给体原子与溶剂分子形成锥底平面.
简介:Tetrabutylammoniumorpotassiumsaltsoforganometalllicderivativesoflacunarypolyanion(RM)3P2W15O59^n-(RM=CpTi,CpZr,C4H7O2SnorC5H9O2Sn)havebeenpreparedandstructurallycharacterizedbyelementalanalysis,IR,UV-Vis,^1HNMRand^183WNMRspectroscopies.Thetitlecomplexesexhibitantitumoractivityinvitro.
简介:对化合物[Na_2(H_2O)_(10)][Cu_4(H_2O)_(12)(H_2W_(12)O_(42))]·15H_2O(简称Na_2Cu_4W_(12))进行了体外抗肿瘤活性研究.应用四甲基偶氮唑盐(3-[4,5-dimethylthiazo-2-y]-2,5-diphenyltetrazoliumbromide,MTT)比色法分析Na_2Cu_4W_(12)对人肝癌细胞(HepG2)、人神经母细胞瘤细胞(SHY5Y)增殖抑制活性.采用光学显微镜观察肿瘤细胞的凋亡形态变化,用流式细胞术分析细胞周期和细胞凋亡,计算各期细胞比例及细胞凋亡率.结果表明,Na_2Cu_4W_(12)对HepG2和SHY5Y2种肿瘤细胞增殖半数抑制浓度IC_(50)值分别为5.3和10.2μmol·L~(-1),且呈剂量依赖性.光学显微镜下处理组细胞出现皱缩、变圆、缩小等形态变化,不同浓度Na_2Cu_4W_(12)处理12h早期凋亡细胞所占的百分比显著增加且呈剂量依赖性.综上所述,Na_2Cu_4W_(12)能够抑制胞瘤细胞增殖,诱导细胞凋亡.