Crystals morphology of ethylenediaminetetraacetatozincate triethylenediaminium and tetramethylethylenediaminium

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Abstract

Trimethylenediamine ethylenediaminetetraacetate zincate trihydrate [HN(CH2CH2)3NH]ZnL · 3H2О and tetramethylethylenediamine ethylenediaminetetraacetate zincate dihydrate [H(CH3)2NCH2CH2N(CH3)2H]ZnL · 2H2О were synthesized by reacting zinc oxide with ethylenediaminetetraacetic acid (H4L) and then with its triethylenediamine or tetramethylethylenediamine salts. The resulting compounds precipitate from aqueous or organic solvents in the form of thread-like, cubic and pyramidal crystals, which are characterized by elemental analysis, scanning electron microscopy, IR spectroscopy, thermogravimetry and differential scanning calorimetry.

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About the authors

V. V. Semenov

G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences

Author for correspondence.
Email: vvsemenov@iomc.ras.ru
Russian Federation, 603950 Nizhny Novgorod

N. V. Zolotareva

G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences

Email: vvsemenov@iomc.ras.ru
Russian Federation, 603950 Nizhny Novgorod

N. M. Lazarev

G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences

Email: vvsemenov@iomc.ras.ru
Russian Federation, 603950 Nizhny Novgorod

B. I. Petrov

G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences

Email: vvsemenov@iomc.ras.ru
Russian Federation, 603950 Nizhny Novgorod

T. I. Lopatina

G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences

Email: vvsemenov@iomc.ras.ru
Russian Federation, 603950 Nizhny Novgorod

E. N. Razov

Institute for Mechanical Engineering Problems, Russian Academy of Sciences

Email: vvsemenov@iomc.ras.ru
Russian Federation, 603950 Nizhny Novgorod

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2. Fig. 1. SEM image of filamentous crystals of trimethylenediaminium ethylenediaminetraacetatocincate trihydrate [HN(CH2CH2)3NH]ZnL-3H2O (I): a – balls, b – sharp needles, c – thread lengths, d – tubes.

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3. Fig. 2. SEM image of tetramethylethylenediamine ethylenediaminetetraacetatocincate [H(CH3)2NCH2CH2N(CH3)2H]ZnL-2H2O(II) dihydrate crystals precipitating from methanol (a, b) and acetonitrile (c, d).

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4. 3. Diffractograms of tetramethylethylenediamine ethylenediaminetraacetatocyncate crystals [H(CH3)2NCH2CH2N(CH3)2H]ZnL-2H2O (II) formed in methyl alcohol (1) and acetonitrile (2).

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5. Fig. 4. IR spectra of zinc ethylenediaminetetraacetate hexahydrate Zn[ZnL]-6H2O (1) and trimethylenediaminium trihydrate ethylenediaminetraacetatocincate [HN(CH2CH2)3NH]ZnL-3H2O (I) (2).

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6. Fig. 5. Dependences of mass loss on temperature (a – TGA, b – DTG) and DSC curves (c) of crystals of trimethylenediaminium ethylenediaminetraacetatocincate trihydrate [HN(CH2CH2)3NH]ZnL-3H2O (1) and tetramethylethylenediamine dihydrate ethylenediaminetraacetatocincate [H(CH3)2NCH2CH2N(CH3)2H]ZnL-2H2O (2).

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