Briefly, all the COD values of the curve-fitting analysis in all the cases were above 0.999, and the chi-squared was 0.85, indicating that these two [beta] resins have a high aromaticity
. However, the aromaticity
index of [beta]-2 was <0.5.
Considering that the H/C value of the PDOM is smaller, its high aromaticity
leads to an easier combination with the sediment, so as to increase the number of adsorption sites and promote the adsorption of OTC.
According to literature , calculated [GAMMA] values have been employed to estimate relative aromaticity
of furan homologues and stabilities of atomic clusters.
Xing, "Adsorption of phenolic compounds by carbon nanotubes: role of aromaticity
and substitution of hydroxyl groups," Environmental Science and Technology, vol.
With increasing aromaticity
, however, the stability of free radicals increases.
; exploring basic chemical concepts with the quantum theory of atoms in molecules.
This critical dilution depends on the diluent aromaticity
, being of about 1.8-2 (solvent-to-bitumen ratio) for a paraffinic diluent and about 4 for naphtha.
Limited structural analysis demonstrated an absence of aromaticity
, countering the argument of phthalate ester contamination (Baden et al.
Therefore the structure, density and aromaticity
of the obtained tars were studied, while the aromaticity
was expressed by the index of aromaticity
calculated from the infrared spectra of tors.
Humic acids are generally thought to be complex aromatic (about 19-25% aromaticity
) macromolecules with amino acids, sugars, peptides, and aliphatic compounds involved in the cross-linking between the aromatic groups [1, 2].
This presumably retained the stereochemistry of critical rings A and D with the spatial conformation of sulfate group at C-3, keto group at C-17, and aromaticity
of ring A intact.
The triazole ring with heteroaromatic structure would have excellent stabilities derived from its molecular symmetry and aromaticity
, so new kinds of heteroaromatic monomers holding triazole unit should have contributions for the chemical stability, thermal and thermooxidative stability.