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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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New phenophospholipids equipped with multi-functionalities: Regiospecific synthesis and characterization.

Sampson Anankanbil1, Bianca Pérez1, Chiranjib Banerjee2

  • 1Department of Engineering, Faculty of Science and Technology, Aarhus University, 8000 Aarhus, Denmark.

Journal of Colloid and Interface Science
|April 6, 2018
PubMed
Summary

New phenophospholipids enhance emulsion and oxidative stability. These multifunctional molecules offer superior performance compared to traditional soybean phosphatidylcholine (PC) and caffeic acid combinations for various applications.

Keywords:
Bioactive ingredientsInterfaceOxidative/physical stabilityPhenophospholipidsRegiospecific synthesis

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Area of Science:

  • * Organic Chemistry
  • * Materials Science
  • * Biochemistry

Background:

  • * Multi-phase systems require molecules with manifold functionalities for complex interfacial reactions.
  • * Phosphatidylcholine (PC) scaffolds offer surface-active properties, while phenolic acids provide antioxidant benefits.
  • * Combining these properties can yield multifunctional molecules for enhanced stability of bioactive ingredients.

Purpose of the Study:

  • * To synthesize novel phenophospholipids by integrating phenolic acids with a PC scaffold.
  • * To evaluate the physical and oxidative stability conferred by these new molecules in delivery systems.
  • * To explore their potential in stabilizing emulsions and protecting sensitive ingredients.

Main Methods:

  • * Synthesis of sn-1-acyl(C12-C18)-sn-2-caffeoyl and sn-1-caffeoyl-sn-2-acyl phosphatidylcholines via regiospecific pathways.
  • * Structural verification using Mass Spectrometry (MS) and Nuclear Magnetic Resonance (NMR) (1H/13C).
  • * Characterization of critical micelle concentrations (CMC), Fourier-transform infrared spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), emulsion stabilization tests, and antioxidant assays (Thiobarbituric Acid Reactive Substances - TBARS, 2,2-diphenyl-1-picrylhydrazyl - DPPH).

Main Results:

  • * Broad spectrum of CMC values observed for phenophospholipids, leading to superior emulsion stability compared to soybean PC.
  • * All synthesized phenophospholipids demonstrated improved oxidation inhibition, with sn-2-caffeoyl variants outperforming sn-1-caffeoyl counterparts, soybean PC, and mixtures.
  • * Incorporation of caffeoyl moiety into the PC scaffold maintained radical scavenging ability and significantly enhanced ion chelating capacity (4.5-fold increase for sn-1-myristoyl(C14)-sn-2-caffeoyl PC versus soy PC).
  • * Fluorescence microscopy confirmed phenophospholipid localization at the interface.
  • * sn-1-myristoyl(C14)-sn-2-caffeoyl PC exhibited optimal multifunctional properties.

Conclusions:

  • * Novel phenophospholipids were successfully synthesized and characterized, demonstrating significant improvements in emulsion and oxidative stability.
  • * The sn-2-caffeoyl phenophospholipids, particularly sn-1-myristoyl(C14)-sn-2-caffeoyl PC, show exceptional potential as multifunctional stabilizers.
  • * These findings highlight the utility of integrating phenolic acids with PC scaffolds for advanced delivery systems and multi-purpose applications.