Aqueous Self-Assembly of Hydrophobic Molecules Influenced by the Molecular Geometry

Jia Chen, Linlin Zheng, Xiaohuan Ji, Jin Wen, Chien Lung Wang, Liping Zhu*, Bin Sun, Xiaosong Wang, Meifang Zhu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Water, in addition to acting as a solvent, plays a constructional role in aqueous self-assembly. The hydrophobic molecule of POSS-PDI-POSS (POSS = polyhedral oligomeric silsesquioxanes, PDI = perylene diimide) has a shape anisotropy in which POSS is a ball-like bulky group and PDI is a flat aromatic group. The self-assembly of this molecule in water created assemblies with inner spaces due to the steric effect, which suppressed aromatic interactions of PDI and trapped water for the colloidal stability. By replacing POSS with dodecyl (C12), C12-PDI-C12 aggregated with extended aromatic interaction of PDI and less inner water. The resulting aggregates tended to agglomerate and precipitate. This discovery extended the scope of aqueous self-assembly by using the building blocks without amphiphilicity and created knowledge for biophysics.

Original languageEnglish
Pages (from-to)1334-1340
Number of pages7
JournalJournal of Physical Chemistry B
Volume126
Issue number6
DOIs
StatePublished - 17 Feb 2022

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