简介：Amethodofsynchronous-high-derivativespectfluorforidentificationofcrudeoilandfueloilpollutionisstudied.Thebestoperationconditionsforthe2ndand4thderiv,areset.Todifferentiateoil-spillatriverandsea,thismethodisrapidandsimple,andthespectrahavehighresolutionpoweras"fingerprint".

简介：Refluxingcalix[4]-1,3-substitutedbenzaldehydederivative(4)withglycinehydrazidederivative,weobtainedanovelcalix[4]arenehydrazonederivative(5)via'1+2'condensationinayieldof78%.Inthereactionofcompound4withL-leucinehydrazidederivativeatroomtemperature,lariatcalix[4]-1,3-aza-crown(6)withchiralaminoacidgroupasbranchedchainwassynthesizedvia'1+1'additioninayieldof70%.Thepreliminaryextractionexperimentssuggestedthathostingcompounds5and6possessedgoodcomplexationabilitiesforα-aminoacids.

简介：Thecopolymerizationofp-diethynylbenzene（PDEB）withphenylacetylene（PhA）,4,4’-diethynylbiphenyl（DEBP）orm-diethynylbenzene（MDEB）arestudiedbyvaryingmoleratiosofmonomers.WhenthemoleratiosofPDEB/PhAarelessorequalto1/5,thecopolymersaresolubleandfusible,buttheothercopolymersareinsolubleandinfusible.Theresultsshowthatthegoodsolventofcross-linkedcopolymersisbenzeneandtheirsolubilityparameteris9.15cal0.5.cm（-1.5）.Andtheirswellability（θp）,Hugginsparameter（χ）,density(d425)andtheaveragemolecularweightsbetweencrosslinks（c）aremeasured.Itisfoundthatθpandcofcopolymersaregreaterbutd425islessthanthatofrespectivehomopolymers.IRspectrashowthatthecopolymershavetransoidconfigurationandsmallnumberofunreactedethynylgroupsexistinthecopolymers.Themechanismaboutthepolymerizationoracetylenicderivativesinitiatedby（Ph3P）2PdCl2isdiscussed.

简介：Anovelvisiblelightactivephoto-catalystnamedCHC/C-PVA/TiO2,thecompositeoftitaniumdioxide（TiO2）withconjugatedderivativeofpolyvinylalcohol（C-PVA）loadedonacordieritehoneycombceramic（CHC）substrate,wasfabricatedbycombiningthesynthesisofTiO2sol,preparationofC-PVAviathermallytreatingpolyvinylalcohol,andimmobilizationofTiO2solandC-PVAonCHC.BydetectingthechangeofUV–visabsorptionspectraofthemodelorganicpollutant（methylorange（MO））inthepresenceofthecompositeundervisiblelightirradiation,thephoto-catalyticactivitywasevaluatedandtheresultsshowthattheCHC/C-PVA/TiO2compositehasanenhancedphoto-catalyticactivitywhencomparedtotheCHC/TiO2composite.Besides,theCHC/C-PVA/TiO2showsagoodphoto-catalyticstabilityafterthefourthcycles.Thestructureanalysesbyscanningelectronmicroscope（SEM）andenergydispersiveX-rayspectroscopy（EDS）showthecoexistenceofC-PVAandTiO2ontheCHCandthecracksonthesurfaceofCHC/C-PVA/TiO2.Resultofultraviolet-visiblediffusereflectionspectroscopy（UV–visDRS）revealsthattheCHC/C-PVA/TiO2canabsorbbothultravioletandvisiblelightwhileresultofX-rayphotoelectronspectroscopy（XPS）indicatestheexistenceofC,OandTielementsintheCHC/C-PVA/TiO2.ThetypicalstructuresaswellastheopticalcharacteristicsoftheCHC/C-PVA/TiO2areresponsiblefortheenhancementinthephoto-catalyticactivity.

简介：8,8′-Dibromo-6,6′,7,7′-tetramethoxy-5,5′-diisopropyl-3,3′-oxydimethylenedinaphtho[2,1-b:2′,1′-d]furan,C32H30Br2O;M.W.=670;triclinic;spacegroupP1;a=8.896（2）,b=10.216（1）,c=10.423（1）A,α=108.48（1）,β=119.36（1）,γ=99.26（1）;V=723.5A3;Z=1,Dcal.=1.479g.cm-3.MoKα=28.11cm-1,F（000）=326,T=293K.Thestructurewassolvedbydirectmethodandfull-matrixleast-squaresrefinementconvergedatR=0.034for2377observedreflections.Theoxygenatominseven-memberedringexistsinadisorderedarrangement.Bothbisnaphthaleneandoxygen-containingfive-memberedringhaveplanarconformationswithdihedralangle6°,showingmarkedaromaticfeature.