Apolymer（poly（9,10-anthracenevinylene-alt-4,4’-（9,9-bis（4-（4’-（1,2,2’-triphenylvinyl）phenoxy）butyl）-9Hfluorene-2,7-diyl）dibenzaldehyde）,P1）wassuccessfullysynthesizedthroughtheWittig-Hornerreactionbyemployingfluoreneand9,10-distyrylanthracenemoietiesasbuildingblocksforbackboneandtetraphenylethenesaspendantgroups.Photophysicalandthermalpropertiesoftheresultingpolymericemitterwerefullycharacterizedbyultraviolet-visible（UVVis）absorptionandphotoluminescence（PL）spectra,thermogravimetricanalysis（TGA）anddifferentialscanningcalorimetry（DSC）.WhileP1emitsanorange-lightcenteredat567nmindilutetetrahydrofuran（THF）solution,thesolidpowderofthepolymerexhibitsstrongyellowemissionpeakedat541nm.Itisalsofoundthattheas-synthesizedpolymershowsuniquepropertyofaggregation-enhancedemission（AEE）.Inaddition,P1possesseshighthermalstabilitywithadecompositiontemperature(Td,5%)of430°Candhighmorphologicalstabilitywithaglasstransitiontemperature（Tg）of171°C.Underthestimulusofmechanicalforce,theemissionofP1canbechangedfromyellowtored(Δλmax=61nm),showingaremarkablemechanochromism.TheresultsfromXRDanalysissuggestthatsuchmechanochromicphenomenonofP1isprobablycausedbythedestructionofcrystallinestructure,whichleadstotheconformationalplanarizationofthedistyrylanthracenemoietiesformingbythepolymerizationandtheincreaseofmolecularconjugationofthebackbone.
