Common ion semiconductor alloys in quantum structures such as dots and rods have the added benefit of control of the electron affinity of the material in addition to the fundamental spectral control provided by quantum confinement. Such alloys could be useful in mixed-material devices such as organic/inorganic photovoltaic cells, since inorganic valence and conduction energy levels can be appropriately matched to the HOMO/LUMO levels of the compatible organic phase. In this research we have synthesized common anion II-VI alloys consisting of a large band-gap core/small band-gap shell. We have been able to achieve a spectral signature ranging up to 200nm over the visible spectrum by a one-pot synthesis of CdxZn1-xSe alloys. The morphology of the alloy (supported by TEM, XRD and PL characterization) was a prolate rod-like quantum structure resulting from coalesced quantum dots consisting of three regions, each of which provides for a specific spectral signature. The 440nm PL peak was from ZnSe, while intermediate wavelengths were due to alloyed CdxZn1-xSe, and a peak at 640nm was due to a CdSe rich shell. With the judicious control of time and temperature of reaction, it was possible to create a multi-region quantum structure that mimicked the spectral characteristics of a selected alloy composition, i.e. achieve emission over a much larger range of the electromagnetic spectrum.