Matches in SemOpenAlex for { <https://semopenalex.org/work/W2553545178> ?p ?o ?g. }
Showing items 1 to 77 of
77
with 100 items per page.
- W2553545178 abstract "A series of tetraphenylethylene (TPE) derivatives based on hexakisphenylbenzene backbone (HPB-nTPE, n=2, 4, 6) were synthesized by cobalt carbonyl-catalyzed cyclotrimerization of alkynes with 1,2-bis(4-(tert-butyl)phenyl)ethyne and 1,2-bis(4'-(1,2,2-triphenylvinyl)-(1,1'-biphenyl)-4-yl)ethyne (TPE-TPE) as starting materials. By varying the ratio of the starting materials, HPB-nTPE (n=2, 4, 6) with 2, 4 or 6 TPE substituents were obtained. The structures of HPB-nTPE (n=2, 4, 6) were characterized by IR, 1 H NMR and MALDI-TOF mass spectra. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) show that the decomposition temperatures of HPB-nTPE are all above 440 ℃, indicative of high thermal stability of HPB-nTPE. The photophysical properties of the tetrahydrofuran solution, the aggregate and the neat solid of HPB-nTPE were investigated. The aggregates of HPB-nTPE (n=2, 4, 6) were obtained in tetrahydrofuran/water mixed solvents with various volume fractions of water, which was confirmed by the scanning electron microscope (SEM). HPB-nTPE (n=2, 4, 6) show typical aggregation induced emission properties, almost non-emissive in tetrahydrofuran solu- tion, but strongly emissive in the aggregate or solid state. The highest fluorescence quantum yields for HPB-nTPE (n=2, 4, 6) in aggregate state are 0.37, 0.36 and 0.37, respectively, which are more than 400 times higher than that in tetrahydrofuran. The quantum yields of the neat solid of HPB-nTPE (n=2, 4, 6) are determined to be 0.39, 0.36 and 0.36, which are ca. 1.8 times of that of the neat solid of tetraphenylethylene. Both restrictions of the intramolecular rotation of phenyl rings and the inter/intramolecular π-π stacking of the TPE chromophores caused by the star-shape rigidity structure of hexakisphenylben- zene suppress the nonradiative transition, consequently, giving higher fluorescence quantum yield of the aggregates and the neat solid of HPB-nTPE in comparison with TPE. This work is of importance for developing highly emissive organic materi- als in solid states. Keywords tetraphenylethylene; hexakisphenylbenzene; aggregation induced emission; nanoaggregate" @default.
- W2553545178 created "2016-11-30" @default.
- W2553545178 creator A5013697180 @default.
- W2553545178 creator A5020527695 @default.
- W2553545178 creator A5025376043 @default.
- W2553545178 creator A5038788855 @default.
- W2553545178 creator A5067856743 @default.
- W2553545178 date "2015-01-01" @default.
- W2553545178 modified "2023-09-24" @default.
- W2553545178 title "Synthesis and Aggregation-induced Emission of Tetraphenylethylene Derivatives Based on Hexakisphenylbenzene Backbone" @default.
- W2553545178 hasPublicationYear "2015" @default.
- W2553545178 type Work @default.
- W2553545178 sameAs 2553545178 @default.
- W2553545178 citedByCount "0" @default.
- W2553545178 crossrefType "journal-article" @default.
- W2553545178 hasAuthorship W2553545178A5013697180 @default.
- W2553545178 hasAuthorship W2553545178A5020527695 @default.
- W2553545178 hasAuthorship W2553545178A5025376043 @default.
- W2553545178 hasAuthorship W2553545178A5038788855 @default.
- W2553545178 hasAuthorship W2553545178A5067856743 @default.
- W2553545178 hasConcept C121332964 @default.
- W2553545178 hasConcept C178790620 @default.
- W2553545178 hasConcept C185592680 @default.
- W2553545178 hasConcept C2776227087 @default.
- W2553545178 hasConcept C2776701986 @default.
- W2553545178 hasConcept C2778987444 @default.
- W2553545178 hasConcept C2780471494 @default.
- W2553545178 hasConcept C2780591471 @default.
- W2553545178 hasConcept C39519442 @default.
- W2553545178 hasConcept C59061564 @default.
- W2553545178 hasConcept C60100273 @default.
- W2553545178 hasConcept C62520636 @default.
- W2553545178 hasConcept C8010536 @default.
- W2553545178 hasConcept C91881484 @default.
- W2553545178 hasConcept C97355855 @default.
- W2553545178 hasConceptScore W2553545178C121332964 @default.
- W2553545178 hasConceptScore W2553545178C178790620 @default.
- W2553545178 hasConceptScore W2553545178C185592680 @default.
- W2553545178 hasConceptScore W2553545178C2776227087 @default.
- W2553545178 hasConceptScore W2553545178C2776701986 @default.
- W2553545178 hasConceptScore W2553545178C2778987444 @default.
- W2553545178 hasConceptScore W2553545178C2780471494 @default.
- W2553545178 hasConceptScore W2553545178C2780591471 @default.
- W2553545178 hasConceptScore W2553545178C39519442 @default.
- W2553545178 hasConceptScore W2553545178C59061564 @default.
- W2553545178 hasConceptScore W2553545178C60100273 @default.
- W2553545178 hasConceptScore W2553545178C62520636 @default.
- W2553545178 hasConceptScore W2553545178C8010536 @default.
- W2553545178 hasConceptScore W2553545178C91881484 @default.
- W2553545178 hasConceptScore W2553545178C97355855 @default.
- W2553545178 hasLocation W25535451781 @default.
- W2553545178 hasOpenAccess W2553545178 @default.
- W2553545178 hasPrimaryLocation W25535451781 @default.
- W2553545178 hasRelatedWork W2008907598 @default.
- W2553545178 hasRelatedWork W2034445380 @default.
- W2553545178 hasRelatedWork W2077301187 @default.
- W2553545178 hasRelatedWork W2127388398 @default.
- W2553545178 hasRelatedWork W2150932253 @default.
- W2553545178 hasRelatedWork W2318513251 @default.
- W2553545178 hasRelatedWork W2319998515 @default.
- W2553545178 hasRelatedWork W2362865897 @default.
- W2553545178 hasRelatedWork W2366356987 @default.
- W2553545178 hasRelatedWork W2371692810 @default.
- W2553545178 hasRelatedWork W2386304453 @default.
- W2553545178 hasRelatedWork W2561463884 @default.
- W2553545178 hasRelatedWork W2581681315 @default.
- W2553545178 hasRelatedWork W2598767649 @default.
- W2553545178 hasRelatedWork W2791634304 @default.
- W2553545178 hasRelatedWork W2871430109 @default.
- W2553545178 hasRelatedWork W2892400617 @default.
- W2553545178 hasRelatedWork W2903569676 @default.
- W2553545178 hasRelatedWork W2961615397 @default.
- W2553545178 hasRelatedWork W2993308279 @default.
- W2553545178 isParatext "false" @default.
- W2553545178 isRetracted "false" @default.
- W2553545178 magId "2553545178" @default.
- W2553545178 workType "article" @default.