Investigation of Entropic Canopy Dynamics of Nanoparticle Organic Hybrid Materials for Potential Application to Novel Environmental Solvents

Abstract

As novel multi−functional green solvents, Nanoparticle Organic Hybrid Materials (NOHMs) are synthesized. NOHMs, which consist of inorganic core and organic canopy, are self−suspended nanoparticles exhibiting liquid-like behavior. NOHMs are recognized as a multi−functional platform material presenting promising potentials for various energy and environmental applications due to negligible vapor pressure and enhanced thermal stability at high temperature over 200 ℃℃. More importantly, NOHMs have a great tunabi lity on both entropic and enthalpic designs by introducing tailored core, linkage, and canopy with specific functionalities. In particular, the entropic property which related to the architecture of the particle is known to influence on the canopy dynamics and degree of order so that the thermal, chemical, and electrical properties can be varied. In this investigation, it was designed to evaluate the entropic effects of NOHM−I−HPE systems on the canopy dynamics. The four different NOHM systems with varying the core size and the core size diversity were synthesized (single 7, 12, 22 nm suspension and ternary suspension). Also, canopy dynamics and properties were investigated via thermal and spectroscopic analyses including ATR FT−IR and PFG NMR. The results revealed that the ununiformed core sizes lessen the space-filling constraints compare to the uniformed core size so differs the canopy dynamics that decreases the confinement and increases the self−diffusion coefficient.