中文名称2,2-联苯基-1-苦基肼基中文同义词1,1-二苯基-2-苦基肼;1-二苯基-2-三硝基苯肼;1,1-二苯基-2-苦基肼自由基(含10-20%的苯);2,2-二苯基-1-苦肼基,自由基;1-二苯-2-苦基肼;2,2-联苯基-1-苦基肼基(含10-20%苯);1,1-二苯-2-苦肼基;A,A二苯基Β苦基肼基游离基英文名称2,2-diphenyl-1-picrylhydrazyl英文同义词2,2-Diphenylpicrylhydrazyl;2,2-Diphenyl-1-picrylhydrazyl,1,1-Diphenyl-2-picrylhydrazylradical,2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl,DPPH;1-diphenyl-2-picrylhydrazyl;1,1-Diphenyl-2-picrylhydrazyl(DPPH);2,2-Diphenyl-1-(2,4,6-trinitrophenyl)-hydrazyl(DPPH);1,1-Diphenyl-2-picrylhydrazylradical,2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl,DPPH;1,1-Diphenyl-2-picrylhydrazylFreeRadical(contains10-20%Benzene);[1-(2,4,6-Trinitrophenyl)-2,2-diphenylhydrazino]radicalCAS号1898-66-4分子式C18H12N5O6*分子量394.32EINECS号217-591-8相关类别其他生化试剂;试剂;有机砌块;化学试剂;有机化合物;通用试剂;肼;对照品;有机化工原料;合成材料中间体;中药对照品;试剂盒-细胞分析试剂盒;AromaticHydrazides,Hydrazines,HydrazonesandOximes;DPPHMol文件1898-66-4.mol结构式2,2-联苯基-1-苦基肼基性质熔点~135°C(dec.)(lit.)密度1.484g/cm3储存条件2-8°C溶解度乙腈(微溶)、氯仿(微溶)、DMSO(微溶)、甲醇(微溶)形态固体颜色绿色水溶解性Solubleindimethylformamide,ethanol,chloroform,ether,carbondisulfinde,acetone,oils,carbontetrachloride,glacialaceticacidandtoluene.Insolubleinwater.最大波长(λmax)515nm(MeOH)(lit.)Merck14,3330BRN1846081稳定性震动敏感EPA化学物质信息Hydrazyl,2,2-diphenyl-1-(2,4,6-trinitrophenyl)-(1898-66-4)2,2-联苯基-1-苦基肼基用途与合成方法应用A,A二苯基Β苦基肼基游离基即DPPH自由基,在特定波长下测定DPPH与抗氧化物质反应前后吸收值的变化可定量测定被测物质的抗氧化能力。DPPH法是测定茶抗氧化性能的一种快Chemicalbook速简便的方法,测定条件掌握得当,可以获得较好的测定稳定性。应用2,2-联苯基-1-苦基肼基为有机肼化合物,可用作化学试剂。生物活性DPPH(2,2-Diphenyl-1-picrylhydrazyl)是一种稳定的自由基,可用于测量抗氧化剂的自由基清除活性。DPPH中氮原子的奇数电子通过从抗氧化剂吸收氢原子而还原为相应的肼。DPPH方法可用于水性和非极性有机溶剂中,并可用于检查亲水性和亲脂性抗氧化剂。体外研究DPPHshowsastrongabsorptionbandat517nmduetoitsoddelectronandsolutionappearsadeepvioletcolour,theabsorptionvanishesastheelectronpairsoff.Theresultingdecolorizationisstoichiometricwithrespecttothenumberofelectronstakenup.Thealcoholicsolutionsof0.5mMaredenselycoloredandatthisconcentration,theLambert-Beerlawisobeyedovertheusefulrangeofabsorption.DPPHassayisarapid,simple,inexpensiveandwidelyusedmethodtomeasuretheabilityofcompoundstoactasfreeradicalscavengersorhydrogendonors,andtoevaluateantioxidantactivityoffoods.Itcanalsobeusedtoquantifyantioxidantsincomplexbiologicalsystems,forsolidorliquidsamples.Thismethodiseasyandappliestomeasuretheoverallantioxidantcapacityandthefreeradicalscavengingactivityoffruitandvegetablejuice.Thisassayhasbeensuccessfullyutilizedforinvestigatingantioxidantpropertiesofwheatgrainandbran,vegetables,conjugatedlinoleicacids,herbs,edibleseedoils,andfloursinseveraldifferentsolventsystemsincludingethanol,aqueousacetone,methanol,aqueousalcoholandbenzene.Itisaconvenientmethodfortheantioxidantassayofcysteine,glutathione,ascorbicacid,tocopherolandpolyhydroxyaromaticcompounds,foroliveoil,fruits,juicesandwines.用途生化研究 |