Features of сhitosan interaction with copper(II) and cobalt(II) tetrasulfophthalocyanines

Lebedevа, N. Sh.; Gubarev, Yury A.; Yurina, Elena S.; V’yugin, A. I.; Lipatova, I. M.

doi:10.1134/s1070363217100139

Cited by 7 publications

(5 citation statements)

References 23 publications

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“…The addition of chitosan to the phthalocyanine solution leads to an increase in the proportion of dimeric structures in both cases. The spectral changes ( Figure 1 ) are consistent with previously obtained data for the indicated systems [ 33 , 34 ] and correspond to the established interaction mechanism according to which CuPc binds to chitosan in the dimeric state due to electrostatic and H-bonding between the peripheral SO 3 − , CuPc, and NH + groups and chitosan groups. Judging by the previously obtained IR spectra [ 33 ] for CoPc, in addition to electrostatic and H-bonding between peripheral CoPc substituents and chitosan groups, the formation of donor—acceptor bonds of the Co←NH 2 group of chitosan was found.…”

Section: Resultssupporting

confidence: 90%

“…The spectral changes ( Figure 1 ) are consistent with previously obtained data for the indicated systems [ 33 , 34 ] and correspond to the established interaction mechanism according to which CuPc binds to chitosan in the dimeric state due to electrostatic and H-bonding between the peripheral SO 3 − , CuPc, and NH + groups and chitosan groups. Judging by the previously obtained IR spectra [ 33 ] for CoPc, in addition to electrostatic and H-bonding between peripheral CoPc substituents and chitosan groups, the formation of donor—acceptor bonds of the Co←NH 2 group of chitosan was found. It should be noted that the advantages of the applied method are its simplicity, economy, easy isolation of the polymer complex of chitosan-MPc in solid form, and the possibility of introducing the required amount of MPc into chitosan.…”

Section: Resultssupporting

confidence: 90%

“…In addition, the authors of [ 25 ] did not evaluate possible changes in the chemical composition of chitosan itself upon heating. Therefore, in this work, we used a differ approach, successfully proven itself earlier [ 33 , 34 ], without using high temperatures and based on the formation of complexes between anionic sulphoderivatives of MPc and a cationic polysaccharide. Briefly, the procedure was as follows: a solution of chitosan hydrochloride was dissolved in deionized water and the required amount of metallosulphophthalocyanine was added with stirring and keeping to establish possible aggregation equilibria.…”

Section: Resultsmentioning

confidence: 99%

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Destruction of Chitosan and Its Complexes with Cobalt(II) and Copper(II) Tetrasulphophthalocyanines

et al. 2021

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Chitosan is a naturally occurring polysaccharide derived from chitin with a wide range of uses. Phthalocyanines are macroheterocyclic compounds that have a number of useful properties such as coloring and catalytic and antioxidant activity. Phthalocyanines are able to immobilize on chitosan, forming complexes with new useful properties. In this work, we evaluated the ability of phthalocyanines to increase the thermal stability of chitosan. Chitosan (CS) forms complexes with copper(II)-(CuPc) and cobalt(II)-(CoPc) tetrasulphophthalocyanines. The processes of destruction of chitosan (CS) and its complexes with sulphophthalocyanines CuPc and CoPc in oxidizing and inert atmospheres have been studied. It was established that, regardless of the atmosphere composition, the first chemical reactions taking place in the studied systems are elimination reactions. The latter ones in the case of chitosan and complex CS-CuPc lead to the formation of spatially crosslinked polymer structures, and it causes the release of CuPc from the polymer complex. It was found that in the case of CS-CoPc elimination reactions did not lead to the formation of crosslinked polymer structures but caused the destruction of the pyranose rings with a partial release of CoPc. Metallophthalocyanines showed antioxidant properties in the composition of complexes with chitosan, increasing the temperature of the beginning of glycosidic bond cleavage reaction by 30–35 °C in comparison with the similar characteristics for chitosan.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

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Destruction of Chitosan and Its Complexes with Cobalt(II) and Copper(II) Tetrasulphophthalocyanines

et al. 2021

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“…Modifications of chitosan (CS) to increase its efficiency as a ligand have received considerable attention in the past few decades [1][2][3][4][5][6]. On the other hand, CS-metal complexes have attracted great interest due to their potential use in environmental treatment, agriculture, medicine and food industries [7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Utility of newly modified chitosan in the removal of heavy metal ions from aqueous medium: ion selectivity, XPS and TGA

Al-Fulaij

Alsagheer

2019

Bull Mater Sci

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The purpose of this study is to evaluate the newly prepared modified chitosan, a new environmentally friendly adsorbent, in the field of wastewater treatment. Chitosan (CS) reacted with 3-chloro-2,4-pentanedione to give CS derivatives, CS-CPD. Modified CS with O-O and NO chelating centres was treated with aqueous solution containing different metal ions to investigate its metal uptake and selectivity. The concentration of metal ions in aqueous solution was measured by inductively coupled plasma-optical emission spectrometry. The structure of the complex was identified by elemental analysis, infrared and solid-nuclear magnetic resonance. In addition, the chelating centres were determined by X-ray photoelectron spectroscopy. The morphology of the modified polymer and its metal complexes was studied to show a dramatic change in cases of the CS-CPD-Pb, CS-CPD-Hg, CS-CPD-Cr and CS-CPD-Co complexes.

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“…In the context of this work, it is important to describe briefly the information obtained earlier on the composition and structure of chitosan complexes with the metal phthalocyanines. In our previous work, it was proved that chitosan binds phthalocyanines differently [17,34]. CuPc in chitosan is in a dimerized state, the polymer complex is formed due to electrostatic interactions between SO -3-groups of metallophthalocyanine and NH + -groups of chitosan, H-binding of peripheral substituents of CuPc with the side groups of the CS macrocycle, as well as due to hydrophobic forces.…”

mentioning

confidence: 99%

Pyrolysis of Complexes of Metallosulphophthalocyanines with Chitosan for Obtaining Graphite-like structures

Lebedevа¹,

Guseinov²,

Yurina³

et al. 2021

Preprint

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Highlights: Polymer complexes of chitosan with copper and cobalt phthalocyanines were obtained Decomposition products of chitosan and polymer complexes with metal phthalocyanines were determined Pyrolysis of chitosan and its polymer complexes with metallosulphophthalocyanines leads to the formation of carbonizates The introduction of copper phthalocyanine into the composition of the polymer complex with chitosan leads to an increase in the content of aliphatic structures in carbonizates, and cobalt phthalocyanine in aromatic compounds

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Features of сhitosan interaction with copper(II) and cobalt(II) tetrasulfophthalocyanines

Cited by 7 publications

References 23 publications

Destruction of Chitosan and Its Complexes with Cobalt(II) and Copper(II) Tetrasulphophthalocyanines

Destruction of Chitosan and Its Complexes with Cobalt(II) and Copper(II) Tetrasulphophthalocyanines

Utility of newly modified chitosan in the removal of heavy metal ions from aqueous medium: ion selectivity, XPS and TGA

Pyrolysis of Complexes of Metallosulphophthalocyanines with Chitosan for Obtaining Graphite-like structures

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