简介：TwokindsofSt/DVBcopolymerbeedscontaining(1-pyrenyl)formyland(1-pyrenyl)methylgroupsrespectivelyhavebeensynthesizedbybothfunctionalizationandcopolymerization.Thefluorescencespectraoftheswollenpolymerssynthesizedaresimilarinshapetothoseofthecorrespondingmodelcompounds,whiletheintensityratioofexcimertomonomershowscleardependenceonthecontentsofthepyrenegroups.

简介：ThemorphologicalchangeofSt/DVBcrosslinkedgelsduringchloromethylationwasstudiedbyfluorescencespectroscopyusingSt/DVBcrosslinkedandhypercrosslinkedgelsascontrolsamples.Ithasbeenfoundthatwithincreaseofchlorinecontent,theexcimeremissionband(～325nm)approachestovanish,whiletheintensityofmulti-ringaggregateemissionband(～420nm)quicklyreachesamaximum,andthendecreasessharplyaccompaniedbyappearanceofanewbroadbandcentredatca488nmwhichroughlycoincideswiththetypicalemissionbandofhypercrossllinkedSt/DVBgels.Mearwhile,theresultofIRmeasurementsuggeststhatmethylenebridgebetweenphenylringsformsandincreaseswithchloromethylationprocess.Theseresultsareexplainedintermsofasidereactionofpost-crosslinking,whichdensifiesthelooselycrosslinkednetworksandundoesthedenselyentangledmicrogelnuclei.Asaresult,themorphologyofthecrosslinkedgelsbecomesmorehomogeneouswithchloromethylation.