110952-50-6

Upstream product

• 97-51-8 5-Nitrosalicylaldehyde 
• 100-36-7 N,N-diethylethylenediamine 

Downstream Products

• 1455010-40-8 [Cu(2-[(2-(diethylamino)ethylimino)methyl]-4-nitrophenolate)(dicyanamide)]_n 

Relevant academic research and scientific papers

Counter anion modulated variation of denticity of NNO donor Schiff base in copper(II) complexes: Isolation of a zwitterionic Schiff base as the metal complex

Three copper(II) complexes [Cu(HL)2(ClO4)]ClO 4H2O (1), [Cu(L)DMF]ClO4 (2) and [CuL(NCO)][Cu2L2 (NCO)2] (3) [where HL = 2-[(2-Diethylamino-ethylimino)-methyl]-4-nitro-phenol, a tridentate Schiffbase] have been synthesized and characterized by elemental analysis, IR and UV-Vis spectroscopy and single-crystal X-ray diffraction studies. In complexes 2 and 3, the Schiff base is acting as a tridentate ligand. However, in complex 1, the Schiff base is present in its zwitterionic form. The denticity of the tridentate Schiff base has been modulated by the acidity of counter anions. Complexes 1 and 2 are mono-meric. Copper(II) assumes square pyramidal geometry in 1 (Addison parameter (τ) = 0.15) and square planar geometry in 2. The asymmetric unit of complex 3 consists of two crystallographically different double end-on cyanate bridged dimers, containing square pyramidal copper(II) {Addison parameter (s) = 0.157}. Complexes 1 and 3 crystallize in triclinic space group, P1 with cell dimensions a=11.3479(10), b=12.5198(9), c= 13.6640(12), α = 94.299(7)°, b = 97.281(7)° and γ = 116.007(6)° (for 1) and a = 11.6149(8), b = 11.8145(9), c= 13.8741(13), α = 65.524(6)°, b = 73.373(6)° and c = 63.857(5)° (for 3), whereas complex 2 crystallizes in monoclinic space group, P21/c with cell dimensions a = 7.5765(2), b=19.6005(6), c= 14.5861(4) and b = 102.679(1)° (for 2). The weak forces like lone pair ··· π / π ··· π/anion ··· π interactions lead to various supramolecular architectures.

Synthesis and characterization of four dicyanamide bridged copper(II) complexes with N2O donor tridentate Schiff bases as blocking ligands

Four copper(II) complexes [Cu(L1)(dca)]n(1), [Cu(L2)(dca)(H2O)]2 (2), [Cu(L3)(dca)]n(3) and [Cu(L4)(dca)]n (4), where HL1 = 2-[(2-aminoethylimino) methyl]-4-nitrophenol, HL2 = 2-[(2-(methylamino)ethylimi-no)methyl]- 4-nitrophenol, HL3 = 2-[(2-(dimethylamino)ethylimino)methyl]-4- nitrophenol and HL4 = 2-[(2-(diethylamino)ethylimino)methyl]-4- nitrophenol are tridentate Schiff base ligands, were synthesized and characterized by elemental analysis, IR and UV-Vis spectroscopy and single-crystal X-ray diffraction studies. Complex 1 and 4 are 1D helical, complex 2 is dimeric and complex 3 is 1D linear chain. X-ray single crystal structure analyses reveal that in complexes 1, 2 and 4, dicyanamide (dca) anions act as a purely μ-1,5-bridging ligand whereas in case of complex 3, two consecutive dca units serve as 1,3-bridging ligand while the third one exhibits end-to-end 1,5-bridging mode. Copper(II) centers in case of two complexes (1 and 3) exhibit square pyramidal geometry as depicted by Addison parameter (s) values whereas metal centers of complexes 2 and 4 depict distorted octahedral and square pyramidal geometry respectively. The role of weak forces like lone pair··· π / π··· π interactions in influencing the self-assembly process appears to be of importance. Such types of interactions leading to supramolecular network in the four complexes are described here.

Nitro schiff base metal complex dyes and their use in optical layers for optical data recording

The present invention relates to Nitro Schiff base metal complex dyes and their use in optical layers for optical data recording, preferably for optical data recording using a laser with a wavelength up to 450 nm. The invention further relates to a write once read many (WORM) type optical data recording medium capable of recording and reproducing information with radiation of blue laser, which employs Nitro Schiff base metal complex dyes in the optical layer.

Nitro schiff base metal complex dyes and their use with monosubstituted squaric acid dyes

The present invention relates to Nitro Schiff base metal complex dyes, to compositions comprising Nitro Schiff base metal complex dyes and monosubstituted squaric acid complex dyes, and their use in optical layers for optical data recording, preferably for optical data recording using a laser with a wavelength up to 450 nm. The invention further relates to a write once read many (WORM) type optical data recording medium capable of recording and reproducing information with radiation of blue laser, which employs Nitro Schiff base metal complex dyes, or compositions comprising Nitro Schiff base metal complex dyes and monosubstituted squaric acid complex dyes, in the optical layer.