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
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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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.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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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.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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