简介：UV-visandluminescencespectroscopictitrationexperimentsshowthatanovelRu(Ⅱ）complexexhibitsoff-on-offpHluminescentswitchingwithamaximumon-offrationofabout100.

简介：Akindofluminousbacterialsensorsthatcanquicklydetecttheacutetoxicityofenvironmentalpollutantsweredeveloped.Themethodisbasedonthedetectionofthecellularlightofbrightluminousbacillusbymeansoffixingcellssoastodetectacutetoxicityofluminousbacillus.Thebacterialsensoriscomposedofimmobilizedfilmofphotobacteriumphosphoreum.Thesebacterialfilmsaresensitivetodetectingthetoxicoids,whicharedifficultorevenimpossibletobemeasuredbytraditionalanalyticalchemistrymethods.Thefilmsshouldbestoredat4℃andthestabilityofthesensorsexceeds1monthwithnomeasurabledeteriorationofthesignal.TheseresultsdemonstratethattheimmobilizedfilmofP.phosphreumcanbeusedtodeveloptheon-lineenvironmentalcontaminationmonitor.

简介：Luminescentcoordinationcompoundswithnitrogen-containingligandshaveattractedmuchattentionduetotheirgoodperformanceinsensorandelectroluminescentdevicetechniques[1-17].Todevelopnewluminescentmaterials,alargenumberofd10metalcomplexes,especiallyzinccomplexes,withthenitrogen-containingligandshavebeensynthesizedandtheirluminescencebehaviourhavebeenstudied[1-11].Ithasbeenfoundthatforagivencomplex,thesizeoftheπ-conjugatedsystemoftheligandandtheelectroniceffectofsubstituentsattheligandareimportantfactorsformodulatingitsluminescentproperties[5,8,9].

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简介：在这研究，新有点磁性、光的Fe3O4/CdTenanocomposites的准备被表明。SuperparamagneticFe3O4nanoparticles被铁、铁的离子的热水的一起沉淀首先综合，与丁氨二酸酸与tetramethylammonium氢氧化物(TMAOH)和化学激活由他们的表面的修正列在后面。修改表面的Fe3O4nanoparticles当时与CdTe量点(QD)是covalently涂的，它与mercaptoacetic酸(MPA)被修改，到通过Fe3O4和carboxyl的表面上的氨基的组的协作的Fe3O4/CdTe磁性、光的nanocomposites在CdTeQD上组织的形式。同样综合的nanocomposites的结构和性质被描绘。nanocomposites与40-50nm，黄绿色的排放特征和房间温度强磁性的一条平均直径拥有了结构，这被显示。荧光和nanocomposites的紫外力的吸收系列显示出CdTeQD与那些作比较的蓝移动。蓝移动的机制被介绍。nanocomposites与8.9emu/g的浸透磁化保留了铁磁性的性质。

简介：Three-dimensional(3D)flowerlikehierarchicalZn2GeO4andMn2+-dopedZn2GeO4microstructureshavebeenpreparedbyafacilehydrothermalapproach.X-Raydiffraction(XRD),fieldemissionscanningelectronmicro-scopy(FESEM),transmissionelectronmicroscopy(TEM)andphotoluminescence(PL)spectrometrywereemployedtocharacterizethesamples.SuchflowerlikehierarchicalZn2GeO4microstructureswithanaveragediameterof3―4μmwerefoundtobeconstructedbyabundantsinglecrystallinenanorodsofabout90nmindiameter.TheluminescentpropertiesofZn2GeO4:xMnphosphorswithdifferentcontentsofMn2+asanactivatorwereinvestigated.TheMn2+-dopedsamplesshowedgreenluminescencecorrespondingtothed-dtransitionofMn2+undertheirradiationofUVlight.Theredshift(from531nmto538nm)inλemwithincreasingMn2+contentwasobservedintheluminescentspectra,whichshouldbeattributedtoaweakcrystalfieldbecauseofthesubstitutionofZn2+byMn2+atadistortedtetrahedrallatticesite.