SYNTHESIS AND CHARACTERIZATION OF THE NOVEL CU (II) AND ZN (II) AZO PIGMENTS

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HADADZADEH H.; REZVANI A.R.

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Journal: Nashrieh Shimi va Mohandesi Shimi Iran Year:2007 | Volume:26 | Issue:2 Page(s): 93-102

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Title

SYNTHESIS AND CHARACTERIZATION OF THE NOVEL CU (II) AND ZN (II) AZO PIGMENTS

Author(s)

HADADZADEH H. | REZVANI A.R. | Issue Writer Certificate

Keywords

AZO PIGMENTQ3

PHENYLCYANAMIDEQ3

THIOUREAQ3

CHARGE TRANSFERQ2

THERMAL ANALYSISQ2

Abstract

Two novel Cu (II) and Zn (II) AZO PIGMENTs, [Cu(azodicyd)]n and [Zn(azodicyd)]n, where azodicyd is dianion of 4,4′-azodi(phenylcyanamide) have been synthesized. Neutral 4, 4′-azodi (phenylcyanamide) can be readily synthesized in high yields from 4, 4′-azodi (aniline) by the desulfurization reaction of its THIOUREA derivative. The Zn (II) and Cu (II) AZO PIGMENTs can be prepared from neutral 4, 4′-azodi (phenylcyanamide) and Cu (OAC)2 or Zn (OAC) 2 in acetone- water, in the presence of triethylamine (TEA). The presence of only one sharp and very intense absorption band for the cyanamide stretching frequency in these AZO PIGMENTs provides evidence that both cyanamide moieties on the phenyl rings are equivalent in the solid state. The electronic absorption spectra of azodi (phenylcyanamide) dianion in DMF show a strong visible absorption, which we have assigned to intraligand CHARGE TRANSFER (ILCT) (NCN-to-N=N). When azodi (phenylcyanamide) dianion coordinated to Cu (II) or Zn (II), this transition is still observed. The electronic spectrum of Cu (II) AZO PIGMENT shows a LMCT band in the visible region. These AZO PIGMENTs can mix and melt with PE, PP and PVC without any thermal degradation. The DSC/TGA data show that the Cu (II) and Zn (II) AZO PIGMENTs decompose at 230 and 275°C, respectively. These AZO PIGMENTs are very stable in acidic, basic, oxidizing and reducing solutions.

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APA: Copy

HADADZADEH, H., & REZVANI, A.R.. (2007). SYNTHESIS AND CHARACTERIZATION OF THE NOVEL CU (II) AND ZN (II) AZO PIGMENTS. NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN), 26(2), 93-102. SID. https://sid.ir/paper/26336/en

Vancouver: Copy

HADADZADEH H., REZVANI A.R.. SYNTHESIS AND CHARACTERIZATION OF THE NOVEL CU (II) AND ZN (II) AZO PIGMENTS. NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN)[Internet]. 2007;26(2):93-102. Available from: https://sid.ir/paper/26336/en

IEEE: Copy

H. HADADZADEH, and A.R. REZVANI, “SYNTHESIS AND CHARACTERIZATION OF THE NOVEL CU (II) AND ZN (II) AZO PIGMENTS,” NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN), vol. 26, no. 2, pp. 93–102, 2007, [Online]. Available: https://sid.ir/paper/26336/en

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