Novel ion recognition systems based on cyclic and acyclic oligo(salen)-type ligands

Unprecedented Hexanuclear Cobalt(II) Nonsymmetrical Salamo-Based Coordination Compound: Synthesis, Crystal Structure, and Photophysical Properties

“…It crystallizes in the monoclinic crystal system, space group C2/c, and consists of six Co(II) atoms, two (HL) 3-units, two µ 2 -acetato ions, two bidentate chelating acetate ions, two coordinated deprotonated methanol molecules, four coordinated methanol molecules, and two crystallizing methanol molecules. This 6:2 (Co(II) atom: Ligand) type of Co(II) coordination compound is unprecedented in the early reported Salamo-based Co(II) coordination compounds bearing the structures of 1:1 [44,58] [78]. (Figure 1) The whole coordination compound molecule is symmetrical and therefore only shows Co1, Co2, and Co3 coordination situation can explain the structure of the whole coordination compound.…”

“…Meanwhile, supramolecular chemistry has recognized Salen-type coordination compounds because of intermolecular hydrogen bonding interactions, C-H···π and π···π stacking interactions consist in chelate rings and the associated aromatic rings [33][34][35][36][37][38][39][40][41][42]. In recent years, our focus switched to the syntheses, structures, and properties of metal coordination compounds with Salamo (2,2 -[Ethylenedioxybis(nitrilomethyli-dyne)]diphenol) and its various derivatives derived from its constitutional units with different substituent groups [43][44][45][46][47][48][49]. The structural motifs of these coordination compound molecules may be affected by several factors, such as the performance of the ligands, the property of the central atoms, anion effects, solvent effects, and so on [50][51][52][53][54][55][56][57][58][59].…”

Crystal structure of bis(μ2-acetato-κ2 O:O′)-bis{μ2-4-chloro-2-(8-(4-(diethylamino)-2-oxidophenyl)-3,6-dioxa-2,7-diazaocta-1,7-dien-1-yl)phenolato-κ6 O:O,N,N′,O′′:O′′}tricobalt(II), C44H49Cl2Co3N6O12

“…Salen and its derivatives are a very important versatile ligand in coordination chemistry as a kind of multidentate ligands [1][2][3][4], and their metal complexes [5][6][7] have a very wide range of applications, such as optical and magnetic materials [8][9][10][11], biological activities [12], supramolecular architectures [13][14][15]. The crystal structure shows that the title complex consists of three Co(II) atoms, two (L) 2− units and two acetate ions.…”

Dynamic Helicity Control of Oligo(salamo)-Based Metal Helicates

“…As one of the possible candidates of dynamic helical complexes, we designed metal complexes having a series of acyclic oligo(salen)-type ligands (H 2 salen = N,N'-disalicylideneethylenediamine) ( Figure 5a) [25][26][27][28][29][30], while there are several types of related helical structures based on monomeric [31][32][33][34][35][36][37][38][39][40][41], dimeric [42,43] and polymeric [44][45][46] salen-type ligands. We employed salamo derivatives, the oxime analog of salen, as the constituent of the oligomers (H 2 salamo = 1,2-bis(salicylideneaminooxy)ethane) [47,48].…”