The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 71776-70-0, Name is 4-Methylpentan-2-amine hydrochloride, SMILES is NC(C)CC(C)C.[H]Cl, in an article , author is Hashim, Nur Athirah, once mentioned of 71776-70-0, Recommanded Product: 71776-70-0.
Herein, the impact of alkyl bridge length is unraveled on the self-assembly of N-annulated perylenetetracarboxamides 1-4 that cooperatively form supramolecular polymers. Spectroscopic studies in different solvents as media for the self-assembly demonstrate the impact that the length of the bridge separating the two amide groups of compounds 1-4 exerts on the supramolecular polymerization process: i) in MCH/Tol (8/2), compounds 1-3 exhibit a consecutive process that, however, it is not operative for 4; ii) the presence of three methylene units in 2, which can induce a parallel distribution of the amide groups, notably decreases the stability of the corresponding aggregates in Tol; iii) increasing the spacer length accelerates the conversion of the metastable, intramolecularly H-bonded monomeric species, which prevents to develop seeded supramolecular polymerizations; iv) the presence of a spacer with five methylene units in 4 hinders the formation of the corresponding 10-membered pseudo-cycle; and v) only the higher relative stability of the inactivated monomeric species of 1 enables pathway complexity, with a kinetically controlled self-assembly to yield nanoparticles and a thermodynamically controlled supramolecular polymerization to achieve fibrillar structures. The results presented herein expand the knowledge on the structure/property relationship for self-assembling units to provide pathway complexity and to bias the kinetics and stability of the supramolecular aggregates.
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Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics