The succinamate(−1) ligand in 4f-metal chemistry: First example of amide coordination in the double-chain 1D coordination polymer catena-aquatris(succinamato(−1))erbium(III)

A series of lanthanide–organic polymers incorporating ethyl-4,5-imidazole-dicarboxylato and formate coligand: structures, luminescent and magnetic properties

“…The relatively strong emission maxima centered at 462 and 563 nm should be assigned to the typical 4 I 15/2 / 4 F 7/2 and 4 I 15/2 / 4 S 3/2 transitions, respectively. 27,28 In addition, a weak emission band with the maximum wavelength of at 681 nm also can be observed, corresponding to the characteristic emission of the 2 F 5/2 / 4 F 9/2 transition. 29,30 The above-mentioned transition has also been found in analogous erbium compounds, in which the coordination number of central ion is nine.…”

First use of the maleamate(−1) ligand in coordination chemistry: Dinuclear copper(II) complexes with N-donors and their interesting ‘organic’ chemistry

“…With the above considerations in mind, we have been exploring 'ligand blend' reactions involving the succinamate(À1) ligand, À OOC-CH 2 -CH 2 -CONH 2 (Hsucm À ), and various N,N 0 -or N,N 0 , N 00 -donors as a means to dinuclear and polymeric copper(II) species [3]; we also reported 1D lanthanide(III) coordination polymers featuring only Hsucm À ligands [4]. Here we report studies on the reactions of maleamic acid (HOOC-CH@CH-CONH 2 , H 2 L) with Cu(ClO 4 ) 2 AE 6H 2 O in the presence of chelating aromatic N,N 0 -or N,N 0 , N 00 -donors as co-ligands, resulting in interesting dinuclear complexes that contain the intact maleamate ion ( À OOC-CH@CH-CONH 2 , HL À ) or the monomethyl maleate(À1) ligand derived from the metal ion-assisted transformation of the former.…”