Synthesis, Characterization and Pd(II) Ions Coordination Equilibrium Studies of - octasubstituted octylthio- and dodecylthio-derivatised phthalocyanines
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Date
2016
Authors
Ogunbayo, T.B.
Akinbulu, I.A.
Mbambisa, G.
Olusegun, M.A.
Olafimihan, J.O.
Journal Title
Journal ISSN
Volume Title
Publisher
Ife Journal of Science
Abstract
Two metal-free phthalocyanines, 1,4,8,11,15,18,22,25,-octakis(octylthio)phthalocyanine (H OOPc) and 2
1,4,8,11,15,18, 22,25,-octakis(dodecylthio)phthalocyanine (H ODPc) were synthesized and characterized 2
1
using Elemental analysis, IR, H NMR, and UV/Vis absorption spectroscopies. The Pd(II) coordination extent
and sequence were investigated for the two molecules at room temperature. The extent and nature of the two
processes were different for the two molecules. The numbers of Pd(II) ions bound by H OOPc and H ODPc 2 2
were 5 and 4 respectively, showing significant contribution from variation in chain length. The longer chain H Pc 2
behaved differently by disallowing Pd(II) ion coordination in its cavity. There was also a direct correlation
between the carbon chain length and equilibrium constants, with the longer chain showing a lower equilibrium
9 3 -1
constant of 1.1 x 10 dm mol .
Description
Keywords
Equilibrium Constant , Phthalocyanines , Coordination , Octylthio , Dodecylthio , Palladium Ions