摘要:
With the aim of checking whether the O(phenoxo)(2)O(methoxy)(2) compartment of 3-methoxysalicylaldehyde-diamine ligands can interact with an aquated proton, the work in this investigation presents the syntheses, characterization, crystal structures and diffuse reflectance spectra of the products obtained from the reactions of three mononuclear copper(II) compounds derived from three H2LOMe ligands (H2LOMe-en, H2LOMe-op and H2LOMe-hex) with perchloric acid in DMF, MeOH and MeOH-MeCN, where 'en', 'op' and 'hex' in the superscripts of the ligand symbols indicate that the diamine functionality comes from ethylenediamine, o-phenylenediamine and trans-1,2-diaminocyclohexane, respectively. From these R reactions, the following six compounds have been isolated: [{(CuLOMe-en)-L-II}(me(2)NH(2))](ClO4) (1), [{(COL)-L-II (OMe-oP))(Me2NH2)](ClO4) (2), [{(CuLOMe-hex)-L-II}(Me2NH2)](ClO4) (3), [{(CuLOMe-en)-L-II}(2)(enH(2))](ClO4)(2) (4, where enH(2) means diprotonated ethylenediamine), [{(CuLOMe-op)-L-II}(2)(opdaH(2))](ClO4)(2)center dot 2H(2)O (5, where enH(2) means diprotonated o-phenylenediamine) and [{(COLOMe-hex)-L-II}(MeOH2)](ClO4) (6). The Me2NH2+ moiety in 1-3, NH3+ sites in 4 and 5 and Me0H; moiety in 6 interact with the 04 compartment by forming bifurcated hydrogen bonds. Interestingly, compound 6 is an unprecedented type of host-guest system. The individual units in 1-6 are self-assembled by non-covalent interactions to generate one, two and three-dimensional self-assemblies. A spectroscopic correlation has been enlightened. (C) 2014 Elsevier Ltd. All rights reserved.