Matches in SemOpenAlex for { <https://semopenalex.org/work/W620079416> ?p ?o ?g. }
Showing items 1 to 64 of
64
with 100 items per page.
- W620079416 abstract "Benzoylation of biphenyl with benzoyl chloride is an important acylation reaction, producing monosubstituted product, 4-phenyl benzophenone (4-PBP) and disubstituted product, 4, 4’- dibenzoylbiphenyl (4, 4’-DBBP). 4, 4’-DBBP is a monomer used as a component in emitting layer in polymer light emitting (PLED) devices. The objective of this study is to synthesize and characterize a highly active sulphated AlMCM-41 acid catalyst by enhancing its acidity through sulphation. Firstly, the AlMCM-41 with various SiO2/Al2O3 ratios was prepared by direct synthesis, followed by conversion to H-AlMCM-41 via ion exchange of NaAlMCM-41 with ammonium nitrate. Finally, sulphated AlMCM-41 was prepared by impregnation of sulphuric acid in toluene. The sulphated MCM-41 materials possess high surface area (>500 m2/g) and large quantities of BrA¶nsted acid sites after characterizing with surface analyzer and pyridine infrared spectroscopy. 27Al MAS NMR indicates the presence of octahedrally coordinated extra-framework sulphated aluminiums (EFAL) and aluminium sulphate. The Hammett indicators show that the acid strength of the sulphated AlMCM-41 materials was stronger than sulphuric acid and H-AlMCM-41 because of sulphate groups attached to aluminium atom in sulphated AlMCM-41. The results of comparative study on the dibenzoylation of biphenyl reaction indicate that only sulphated AlMCM-41 gives both monosubstituted 4-PBP and disubstituted 4, 4’-DBBP with the highest activity compared to sulphuric acid, H-AlMCM-41 and sulphated amorphous silica." @default.
- W620079416 created "2016-06-24" @default.
- W620079416 creator A5022525550 @default.
- W620079416 date "2006-03-01" @default.
- W620079416 modified "2023-09-24" @default.
- W620079416 title "Synthesis and characterization of sulphated AIMCM-41 and its catalytic activity in dibenzoylation of biphenyl with benzoyl chloride" @default.
- W620079416 hasPublicationYear "2006" @default.
- W620079416 type Work @default.
- W620079416 sameAs 620079416 @default.
- W620079416 citedByCount "2" @default.
- W620079416 countsByYear W6200794162017 @default.
- W620079416 crossrefType "dissertation" @default.
- W620079416 hasAuthorship W620079416A5022525550 @default.
- W620079416 hasConcept C117760992 @default.
- W620079416 hasConcept C13965031 @default.
- W620079416 hasConcept C145148216 @default.
- W620079416 hasConcept C161790260 @default.
- W620079416 hasConcept C178790620 @default.
- W620079416 hasConcept C185592680 @default.
- W620079416 hasConcept C2778279444 @default.
- W620079416 hasConcept C2778695967 @default.
- W620079416 hasConcept C2779485729 @default.
- W620079416 hasConcept C2780230327 @default.
- W620079416 hasConcept C2780591471 @default.
- W620079416 hasConcept C2781464203 @default.
- W620079416 hasConceptScore W620079416C117760992 @default.
- W620079416 hasConceptScore W620079416C13965031 @default.
- W620079416 hasConceptScore W620079416C145148216 @default.
- W620079416 hasConceptScore W620079416C161790260 @default.
- W620079416 hasConceptScore W620079416C178790620 @default.
- W620079416 hasConceptScore W620079416C185592680 @default.
- W620079416 hasConceptScore W620079416C2778279444 @default.
- W620079416 hasConceptScore W620079416C2778695967 @default.
- W620079416 hasConceptScore W620079416C2779485729 @default.
- W620079416 hasConceptScore W620079416C2780230327 @default.
- W620079416 hasConceptScore W620079416C2780591471 @default.
- W620079416 hasConceptScore W620079416C2781464203 @default.
- W620079416 hasLocation W6200794161 @default.
- W620079416 hasOpenAccess W620079416 @default.
- W620079416 hasPrimaryLocation W6200794161 @default.
- W620079416 hasRelatedWork W1900809685 @default.
- W620079416 hasRelatedWork W1971904149 @default.
- W620079416 hasRelatedWork W1979068016 @default.
- W620079416 hasRelatedWork W1999535261 @default.
- W620079416 hasRelatedWork W2003359433 @default.
- W620079416 hasRelatedWork W2005944496 @default.
- W620079416 hasRelatedWork W2008195938 @default.
- W620079416 hasRelatedWork W2022295453 @default.
- W620079416 hasRelatedWork W2031561839 @default.
- W620079416 hasRelatedWork W2034782716 @default.
- W620079416 hasRelatedWork W2041872036 @default.
- W620079416 hasRelatedWork W2072564139 @default.
- W620079416 hasRelatedWork W2085360451 @default.
- W620079416 hasRelatedWork W2089926949 @default.
- W620079416 hasRelatedWork W2118460703 @default.
- W620079416 hasRelatedWork W2280754916 @default.
- W620079416 hasRelatedWork W2377754994 @default.
- W620079416 hasRelatedWork W2547908159 @default.
- W620079416 hasRelatedWork W2597457255 @default.
- W620079416 hasRelatedWork W2915192591 @default.
- W620079416 isParatext "false" @default.
- W620079416 isRetracted "false" @default.
- W620079416 magId "620079416" @default.
- W620079416 workType "dissertation" @default.