Characterization of an unprecedented (ethanol)4 cluster in a novel photoluminescent silver(I) coordination polymer

An unprecedented (ethanol)4 cluster is observed in a photoluminescent silver(I) coordination polymer host, [Ag2(dmt)2(nda)·2EtOH]n (1, dmt = 2,4-diamino-6-methyl-1,3,5-triazine, H2nda = naphthalene-1,4-dicarboxylic acid, EtOH = ethanol). In 1, two pairs of symmetry-related ethanol molecules are hydrogen bonded with each other by Osingle bondH⋯O hydrogen bonds to form a R44(8) hydrogen bond motif where all the ethanol molecules are proton acceptor and proton donor at the same time. The thermal stability and luminescent behavior of 1 were also discussed.