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Abstract
By maintaining α-Ag(DM)2 (DM = C10H8N4) around room temperature (RT) () during ultraviolet–visible (UV–vis) irradiation, a series of photochemical products namedβ was obtained.The solid β was comprised of structurally different compounds. All of the solidβ phases share the original chemical formula ofAg(DM)2 and exhibit semiconducting behaviour, yet they differ from eachother in their XRD patterns. They are divided into two phases:β1 and β2. Compared with the XRD pattern of theα phase, theβ1 phase exhibited XRDpeaks at the same 2θ-angles but with different relative intensities, while theβ2 phase exhibited totally different XRD patterns from those of theα orβ1 phases. The actual composition of a particular solid of‘β’ phase is dependent upon irradiation time, and can be controlled continuously. Around RT, theα phase exhibits metallic conductivity, while theβ1 and β2 phases are suggested to be semiconductors. As a result, onecan continuously and finely control the electrical resistivity ofAg(DM)2 by UV irradiation to modify it into a mixture ofα,β1 and/or β2 phases.
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