Toward Copper(I)-Iodide-Based Coordination Architectures via N,N′-Bis(pyridylcarbonyl)-4,4′-diaminodiphenyl Ether with Different Solvent Compositions

Abstract

In this study, copper(I) iodides and N,N′-bis(pyridylcarbonyl)-4,4′-diaminodiphenyl ether (papo) reacted to give new metal−organic frameworks. In the absence of CH3CN the reaction gave [CuI(papo)]n (1) and [Cu3I3(papo)]n (2), whereas in the presence of CH3CN 2 and [Cu8I4(dmtrz)4]n (3; dmtrz = 3,5-dimethyl-1,2,4-triazolate, from in situ ligand formation) were obtained. In the same pot in the presence of CH3CN, a red and mononuclear Cu(II) complex, [Cu(dmtap)2]I2 (4, dmtap = 2,4-dimethyl-1,3,5-triazapentadiene), was also isolated which supports the in situ synthesis of dmtrz by a non-ammonia pathway. The single and double stair-step structures of 1 and 2 are composed of single and double CuI-chains, respectively, and these chains are further linked through bridging papo ligands to form sheet structures. Although classical hydrogen bonding interactions in 1 is found absent, these interactions between amide−iodide in 2 were observed and found to increase its structural complexity. 3 contains a distorted Cu(I)...