Luminescence properties of monoclinic Cu4I4(Piperidine)4

A new modification of Cu4I4Pip4 has been synthesized under hydrothermal conditions. X-ray crystallography revealed that this compound crystallized in the monoclinic system and consists of a tetrahedral core with composition Cu4I4, in which each Cu atom is coordinated by a piperidine molecule via the N atom. In contrast to a previously reported modification of Cu4I4Pip4, the present modification shows luminescent properties when exposed to UV-light. In addition, we have used time-dependent density functional theory calculations to characterize both compounds in term of both absorption and emission.

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► A new modification of Cu4I4Pip4 has been produced under hydrothermal conditions.
► This modification have fluorescence properties when it is exposed to UV light.
► The fluorescence properties was characterized with fluorescence spectrophotometer.
► Quantum mechanical calculations was also performed.