《Tuning layered superstructures in precision polymers》 was published in Scientific Reports in 2020. These research results belong to Danke, Varun; Reimann, Sophie; Binder, Wolfgang H.; Gupta, Gaurav; Beiner, Mario. Product Details of 141-86-6 The article mentions the following:
An approach to influence and control layered superstructures by varying the methylene sequence length between two consecutive functional groups in linear precision polymers containing 2,6-diaminopyridine (DAP) groups is presented. Layered superstructures with repeating units involving three monomeric units along the chain direction with very high coherence lengths upto 110 nm are observed in case of shorter alkyl segments, (16 and 18 CH2 units), while more conventional layer superstructures incorporating only one monomer are found for related polymers with 20 CH2 units per methylene sequence. A building block model explaining the unusually large periodicity of three monomeric units is proposed wherein layers containing crystalline or amorphous methylene sequences occur in different combinations. Occurrence of different layered structures depending on crystallization conditions, methylene sequence length as well as functional group type is explained by a competition of H-interactions between the DAP groups and the van der Waal forces between the hydrophobic methylene groups. In the experimental materials used by the author, we found 2,6-Diaminopyridine(cas: 141-86-6Product Details of 141-86-6)
2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Product Details of 141-86-6