Organogels of FmocFF: Exploring the Solvent-Dependent Gelmorphic Behavior

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Organic Chemistry

Background:

• 9-fluorenyl methoxycarbonyl-phenylalanine (FmocFF) is a well-studied low-molecular-weight hydrogelator.
• The organogelation potential of FmocFF remains underexplored despite extensive hydrogel research.

Purpose of the Study:

• To systematically investigate the formation and properties of FmocFF-based organogels across a spectrum of organic solvents.
• To elucidate the factors influencing gelmorphic behavior, mechanical strength, and structural characteristics of FmocFF organogels.

Main Methods:

• Systematic exploration of FmocFF organogelation in diverse organic solvents.
• Rheological measurements to assess mechanical strength.
• In situ second-harmonic generation (SHG) microscopy for native gel structure analysis.

Main Results:

• FmocFF demonstrates robust organogelation capabilities across various organic solvents.
• Organogels exhibit diverse gel morphologies and degrees of crystallinity, influenced by the solvent.
• Mechanical properties and structure are significantly affected by both solvent-solute interactions and the degree of crystallinity.

Conclusions:

• FmocFF is a versatile organogeltor with tunable properties based on solvent selection.
• Crystallinity emerges as a critical factor, alongside solvent-solute interactions, in dictating FmocFF organogel structure and mechanical performance.
• In situ SHG microscopy provides valuable insights into the native state of organogel structures.