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The solubilities (s, mol/L) of different oxyquinolinates
(oxinates, MeL2) are calculated using the formulae obtained
according to elementary algebra, with the use of Excel spreadsheets. The
calculations are involved with solution of algebraic equation of the third
degree, obtained on the basis of concentration balances. The root of this
equation, , is then inserted into the charge balance,
and resolved according to zeroing procedure. In principle, the calculations are
related to aqueous media. Nonetheless, the extension on liquid-liquid
extraction systems is also proposed.
A novel poly(quinquethiophene) partially containing
3,4-ethylenedioxythiophene (EDOT) and 3-hexylthiophene, poly(3,3 ''''-dihexyl-3',4',3''',4'''-diethylenedioxy-2,2':5',2'':5'',2''':5''',2''''-quinquethiophene), was synthesized by three types of polycondensations. Among them,
direct C-H coupling reaction gave the polymer with the highest molecular
weight. The resulting polymer was soluble in common organic solvents.
Absorption and fluorescence spectra of the polymer showed a remarkable
red-shift compared with the corresponding monomer due to the expansion of
effective π-conjugation length.