M. Bakir, O. Brown / Journal of Molecular Structure 609 32002) 129±136
135
Fig. 6. A plot of the absorbance of a-)series 1) and b-)series 2) conformations of dpkbh 1.25 £ 1025 M in DMF at 392 and 324 nm, respectively,
versus concentration of CdCl2.
species such as HClO4, NaOH, CH3COOH and others,
all of which interact with dpkbh, were used to adjust
the pH of the solution. The interaction between the
competing species and dpkbh affect the equilibrium
distribution of the high- and low-energy electronic
states of dpkbh and its optosensing properties.
Due to its convenient synthesis, rich physicochem-
ical properties and current interest in molecular
sensors, the coordination chemistry and optosensing
behavior of dpkbh are under investigation.
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Acknowledgements
We acknowledge funding from The University of the
West Indies and Inter-America Development Bank.