Ce/Au(CN)2--Based Coordination Polymers Containing and Lacking Aurophilic Interactions

Yann Garcia, Bao Lian Su, Ryan J. Roberts, John C. Ahern, Howard H. Patterson, Daniel B. Leznoff

    Research output: Contribution to journalArticlepeer-review

    Abstract

    New members of the Ln[Au(CN)2]3·3H2O and [nBu4N]2[Ln(NO3)4Au(CN)2] series Ln = Ce (CeAu3 and CeAu respectively) are reported herein where their synthesis, structure and photoluminescence properties are discussed. The first is a 3-D coordination polymer with aurophilic interactions of 3.35 Å and the latter is a 1-D coordination polymer that lacks them. At 293 K both CeAu3 and CeAu display characteristic CeIII-based emission at λmax = 393 nm (5d→2FJ), however in CeAu3 AuI-based emission (λmax = 410, 1MLCT) dominates the spectrum. At 77 K however, the dominant emission is AuI-based with characteristic emissions of λmax = 430 nm (1MLCT) and 490 nm (3MLCT). The key difference in the luminescence of these two materials can be rationalized in terms of their respective structures, through either the aurophilic network and lack thereof and/or the rigidity offered in the 3-D structure of CeAu3.

    Original languageEnglish
    Pages (from-to)2082-2087
    Number of pages6
    JournalEuropean Journal of Inorganic Chemistry
    Volume2016
    Issue number13-14
    DOIs
    Publication statusPublished - 1 May 2016

    Keywords

    • Aurophilicity
    • Cerium
    • Fluorescence spectroscopy
    • Heterometallic complexes

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