13C and 27Al NMR relaxation, viscosity, and 1H diffusion studies of an ethylaluminum dichloride melt

Article Abstract:

13C and 27Al nuclear magnetic resonance and 1H diffusion ordered studies of a 1:1 1-ethyl-3-methylimidazolium chloride (MEICI)-ethylaluminum dichloride melt showed a direct correlation between 13C and 27Al rotational correlation times, self-diffusion coefficients and viscosity. The relationships indicate that the transport properties of the melt are determined by the molar quantities of the salt rather than the individual properties of the ions. Results also showed that reasonable values for the radius of MEI+ can be obtained by suing the appropriate microviscosity factors

Viscosity, Diffusion, Diffusion (Physics)

---

139La NMR relaxation and chemical shift studies in the aqueous nitrate and chloride solutions

Article Abstract:

A study was conducted to examine the relaxation and chemical shifts of 139lanthanum in the aqueous nitrate and chloride solutions at 274-343 K. The activation energies of lanthanum were determined in both La(NO3)3-LiNO3 or -HNO3, and LaCl3-LiCl3 or -HCL systems. Results showed that chloride ions do not interact with lanthanum below 4.3 mol/L. Moreover, nitrate ions induce upfield shifts and chloride ions induce downfield shifts relative to the amount of hydrated lanthanum.

Ions, Nitrates, Lanthanum

---

Comparative study of exciton relaxation dynamics in C60 and C70 solid

Article Abstract:

The time-resolved photoluminescence (PL) method and transient absorption (TA) technique were used to examine the exciton dynamics of C60 and C70 solids. The decay dynamics of C70, in contrast to C60, were found to be mainly governed by exciton-trap annihilation under the relatively low fluence condition for PL measurement. At the extremely high fluence condition used in TA measurement, the decay in C70 is faster that the PL decay.

Usage, Absorption, Exciton theory, Excitons, Carbon allotropes, Photoluminescence

Similar abstracts:

• Abstracts: In situ vibrational spectroscopy studies of supported niobium oxide catalysts. Deposition of Ru adatoms on Pt using organometallic chemistry: catalysts for electrooxidation of MeOH and adsorbed carbon monoxide
• Abstracts: Viscosity and inertia-limited rupture of dextran-supported black lipid membranes. Interaction of wedge-shaped proteins in flat bilayer membranes
• Abstracts: Vapor adsorption in thin silicalite-1 films studied by spectroscopic ellipsometry

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.