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RESEARCH PRODUCT
Synthesis and thermal behavior of Janus dendrimers, part 1
Noora KuulojaJuhani HuuskonenKari RissanenTero TuuttilaManu Lahtinensubject
Thermogravimetric analysisChemistryCondensed Matter PhysicsPentaerythritolThermogravimetrychemistry.chemical_compoundDifferential scanning calorimetryDendrimerPolymer chemistryProton NMRThermal stabilityPhysical and Theoretical ChemistryThermal analysisInstrumentationdescription
Abstract Eight Janus-type dendrimers up to the second generation were synthesized, and their thermal properties were evaluated. Compounds consist of the dendritic bisMPA based polyester moieties, and either 3,4-dihexyloxybenzoic acid or 3,4-dihexadecyloxybenzoic acid moieties, attached to opposite sides of the pentaerythritol core. The structures of the molecules were verified with 1 H NMR, 13 C NMR, ESI TOF mass spectrometry and elemental analysis. The thermal stability was evaluated by thermogravimetric analysis, displaying onset decomposition temperatures ( T d ) ranging from 241 to 308 °C. Phase transitions were studied by differential scanning calorimetry. Based on the performed studies it was confirmed that OH terminated dendrimers 2 , 4 , 6 and 8 exhibited liquid crystalline phases. Also, the X-ray powder diffraction measurements were accomplished for the dendrimers having terminal hydroxyl groups.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-01-01 | Thermochimica Acta |