Synthesis, structure and luminescence behaviour of heptacoordinated one-dimensional coordination polymers of the type [Cd(L)(dca)] (X) (L = a pentadentate Schiff base; dca = dicyanamide; X =ClO4-,

Bhola Nath Sarkar

¹

,

Kishalay Bhar

²

,

Soumi Chattopadhyay

³

et al.

Syntheses, structures, and properties of two binuclear cadmium(II) iodides containing a bis(tridentate) Schiff base/tetradentate tripodal amine: control of coordination numbers by varying ligand matrices

“…Polyamines, heterocycles, and Schiff bases are important chelating ligands [22][23][24] in this regard. Recently, we have reported [25][26][27][28] a series of cadmium(II) compounds with varied molecular and crystalline architectures and with interesting molecular properties using multidentate N-donor Schiff bases and polyamines. In our present endeavor, we have chosen one classical hexadentate Schiff base, N,N 0 -(bis(pyridine-2-yl)formylidene)triethylenetetramine (L1) and a tetradentate tripodal amine, tris(2-aminoethyl)amine (L2) (Scheme 1) to isolate cadmium(II) iodide compounds with different geometries and molecular properties.…”

Synthesis, structure and luminescence behaviour of a mononuclear cadmium(II) dicyanamide and a coordination polymer of mercury(II) dicyanamide containing 2,2′-dipyridylamine (dpaH) as end-capping ligand/anion of dpaH as binucleating bridge. Variance in coordination numbers, nuclearities and architectures with metal ion templates

“…In IR spectra, three strong bands at 2287, 2226 and 2160 cm À1 in 1 close to the free dicyanamide stretching frequencies [48] [m as + m s (C"N) 2286 cm À1 , m as (C"N) 2232 cm À1 and m s (C"N) 2179 cm À1 ] are indicative [41] of monodentate nitrile nitrogen binding of dca. In the polynuclear 2, the bands are shifted towards higher frequencies [2291, 2245 and 2180 cm À1 ] than those in mononuclear 1 presumably due to bridging coordination of dca [43]. …”

“…Group 12 metal ions, specially cadmium(II) and mercury(II), are well suited [31][32][33][34] as their d 10 configurations permit a wide variety of symmetries and coordination numbers; a special attention has been drawn for use of their compounds as electronic and optoelectronic devices [17,[35][36][37]. Dicyanamide (dca) is a versatile [38][39][40][41][42][43] bridging unit and may bind metal ion through terminal or bridges such as l 1,1, l 1,3, l 1,5 , l 1,1,5, l 1,3,5 , l 3,3,5 and l 1,3,3,5 , etc. motifs.…”

Syntheses, molecular and crystalline architectures, and luminescence behaviours of two dinuclear cadmium(II) compounds containing a tetradentate N-donor di-Schiff base

“…The larger-sized pseudohalide, dicyanamide (dca), is a versatile [21][22][23][24] bridging unit and may bind metal ion through terminal or bridges such as l 1,1, l 1,3, l 1,5 , l 1,1,5, l 1,3,5 , l 3,3,5 and l 1,3,3,5 motifs. Recently, we are active [25][26][27][28] to isolate cadmium(II) compounds of varied molecular and crystalline architectures and with interesting molecular properties using multidentate N-donor organic di-Schiff bases and polyamines. In our present endeavor, we have taken a tetradentate di-Schiff base N,N 0 -(bis(pyridin-2-yl)benzylidene)-1,3-propanediamine (L) (Scheme 1) to synthesize cadmium(II) compounds of different geometries and molecular properties in combination with bridging units like chloride and dicyanamide.…”