Red and blue luminescent metallo-supramolecular coordination polymers assembled through π–π interactions †

Polymeric topologies in cadmium(II) dithiophosphate adducts of the isomeric n-pyridinealdazines, n = 2, 3 and 4

“…2 and selected bond distances and angle are included in Table 3. The cadmium atom is situated on a crystallographic centre of inversion and is coordinated in a trans-N 2 S 4 donor set, by contrast to that observed in (1). In this case the Cd--S bond distances differ by only 0.021 A and it is noteworthy that the Cd--N bond distance is longer in (2) compared to (1); a similar observation is applicable to the structure of (3), Table 3, but not to the same extent.…”

“…The adducts were obtained from refluxing (2h) the parent cadmium compound (0.2g) with a 1 : 1 stoichiometric amount of the n-pyridinealdazine ligand, n ¼ 2, 3 and 4 (Aldrich), in CHCl 3 solution. After reaction, the solvent was removed in vacuo and the residue recrystallised by slow evaporation from dichloromethane/hexane ( 2 = 1 ), for (1), and chloroform/acetonitrile ( 3 = 1 ), for (2) and (3), solutions of the respective compounds.…”

“…While 1-D, 2-D and 3-D arrays of cadmium complexes attract attention in terms of their possible applications in chemical luminescence [1][2][3][4][5], the focus of our studies has been upon the delineation of the factors that control supramolecular aggregation in these and related systems. An emerging theme from our work indicates that steric control, exerted by (i) ligand-bound R groups, (ii) metalbound organic substituents, (iii) where applicable, restricted coordination ability of diimine bases, and (iv) some combination of (i)-(iii) above, can be exploited to generate specific aggregation patterns [6][7][8].…”

Electron delocalization in vinyl ruthenium substituted cyclophanes: Assessment of the through-space and the through-bond pathways

“…Implications are numerous and incluel e, inter alia , the photophysics of luminophores [6][7][8] or of polymers having exte nel eel arene substitue nts or backbones [9,10], the formation of self-assembleel coorelination cages [3,5,11] anel the exchange of magnetic [1 2-18] or electronic information [8,16,[19][20][21][22][23][24][25][26][27][28]. 7t-Stacking is also hel eI res ponsibl e for rapiel charge mig rati o n over oligonucleotieles a nel DNA [29][30][31][32] or columnar m eso phases mael e up of suitably functionalizeel eli sk-shape el bllileling blocks with exteneled aromatic cores [32][33][34][35][36][37].…”

Supramolecular complexes of cobalt(II), manganese(II) and cadmium(II) with bis(terpyridine) ligand as novel luminescent materials

“…As follows from the presented results the luminescence behaviour of the cadmium(II) and manganese(II) complexes are similar. With reference to the previous spectroscopic work on the luminescence of the Cd(II) complexes observed in these systems luminescence in UV region of spectrum is assigned to intraligand -* transitions, when the blue luminescence is related to the charge transfer transitions 16,17 . The blue luminescent materials are important for the production of displays.…”