HYDROSOL OF C70 FULLERENE: SYNTHESIS AND STABILITY IN ELECTROLYTIC SOLUTIONS
This article is devoted to the synthesis and characterization of the hydrosol of C70 of the son/nC70 type and to its coagulation by sodium chloride and cetyltrimethylammonium bromide (CTAB). At C70 concentration of 3.3×10–6 M, the electrokinetic potential is ζ= –40 ± 4 mV, the particle size expresse...
Saved in:
| Date: | 2021 |
|---|---|
| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
| Published: |
V.I.Vernadsky Institute of General and Inorganic Chemistry
2021
|
| Online Access: | https://ucj.org.ua/index.php/journal/article/view/369 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Journal Title: | Ukrainian Chemistry Journal |
Institution
Ukrainian Chemistry Journal| id |
oai:ojs2.1444248.nisspano.web.hosting-test.net:article-369 |
|---|---|
| record_format |
ojs |
| spelling |
oai:ojs2.1444248.nisspano.web.hosting-test.net:article-3692021-12-22T09:12:01Z HYDROSOL OF C70 FULLERENE: SYNTHESIS AND STABILITY IN ELECTROLYTIC SOLUTIONS Mchedlov-Petrossyan, Nikolay Marfunin, Mykyta Klochkov , Volodymyr Radionov, Petro fullerene C70 hydrosol, electrokinetic potential, sodium chloride, cetyltrimethylammonium chloride, critical concentration of coagulation, Derjaguin–Landau–Verwey–Overbeek theory, Hamaker diagram, fullerene–fullerene Hamaker constant, structural contribution to the inter-particle interaction. This article is devoted to the synthesis and characterization of the hydrosol of C70 of the son/nC70 type and to its coagulation by sodium chloride and cetyltrimethylammonium bromide (CTAB). At C70 concentration of 3.3×10–6 M, the electrokinetic potential is ζ= –40 ± 4 mV, the particle size expressed as Zeta-average is 97±3 nm; at higher C70 concentrations, 1.7×10–5 and 6.9×10–5 M, the size stays the same: 99 – 100 nm. The critical concentration of coagulation (CCC) values, were determined using the diameter increasing rate (DIR) on NaCl concentration. The CCCs are concentration-dependent: 250, 145, and 130 mM at C70 concentrations 3.3×10–6, 1.7×10–5, and 6.9×10–5 M, respectively. The CCC for the CTAB surfactant is much lower, about 5×10–3 mM. At 0.02 mM CTAB, however, the overcharging up to ζ = + 40 mV and stabilization of the colloidal particles take place. Interpretation of the hydrosol coagulation by NaCl using the Derjaguin–Landau–Verwey–Overbeek theory makes it possible to determine the Hamaker constant of the C70–C70 interaction in vacuum, if only electrostatic repulsion and molecular attraction are taking into account: AFF ≈ 7×10–20 J. On the other hand, if we use the value AFF = (16.0–16.6)×10–20 J, obtained earlier in the study of organosols, then the data for hydrosols can be explained only by the introduction of an additional type of interactions. Following the terms of Churaev and Derjaguin, one should take into account the structural contribution to the interaction energy, which stabilizes the hydrosol. V.I.Vernadsky Institute of General and Inorganic Chemistry 2021-11-26 Article Article Physical chemistry Физическая xимия Фізична xімія application/pdf https://ucj.org.ua/index.php/journal/article/view/369 10.33609/2708-129X.87.10.2021.63-73 Ukrainian Chemistry Journal; Vol. 87 No. 10 (2021): Ukrainian Chemistry Journal; 63-73 Украинский химический журнал; Том 87 № 10 (2021): Ukrainian Chemistry Journal; 63-73 Український хімічний журнал; Том 87 № 10 (2021): Український хімічний журнал; 63-73 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/369/190 |
| institution |
Ukrainian Chemistry Journal |
| baseUrl_str |
|
| datestamp_date |
2021-12-22T09:12:01Z |
| collection |
OJS |
| language |
English |
| topic_facet |
fullerene C70 hydrosol electrokinetic potential sodium chloride cetyltrimethylammonium chloride critical concentration of coagulation Derjaguin–Landau–Verwey–Overbeek theory Hamaker diagram fullerene–fullerene Hamaker constant structural contribution to the inter-particle interaction. |
| format |
Article |
| author |
Mchedlov-Petrossyan, Nikolay Marfunin, Mykyta Klochkov , Volodymyr Radionov, Petro |
| spellingShingle |
Mchedlov-Petrossyan, Nikolay Marfunin, Mykyta Klochkov , Volodymyr Radionov, Petro HYDROSOL OF C70 FULLERENE: SYNTHESIS AND STABILITY IN ELECTROLYTIC SOLUTIONS |
| author_facet |
Mchedlov-Petrossyan, Nikolay Marfunin, Mykyta Klochkov , Volodymyr Radionov, Petro |
| author_sort |
Mchedlov-Petrossyan, Nikolay |
| title |
HYDROSOL OF C70 FULLERENE: SYNTHESIS AND STABILITY IN ELECTROLYTIC SOLUTIONS |
| title_short |
HYDROSOL OF C70 FULLERENE: SYNTHESIS AND STABILITY IN ELECTROLYTIC SOLUTIONS |
| title_full |
HYDROSOL OF C70 FULLERENE: SYNTHESIS AND STABILITY IN ELECTROLYTIC SOLUTIONS |
| title_fullStr |
HYDROSOL OF C70 FULLERENE: SYNTHESIS AND STABILITY IN ELECTROLYTIC SOLUTIONS |
| title_full_unstemmed |
HYDROSOL OF C70 FULLERENE: SYNTHESIS AND STABILITY IN ELECTROLYTIC SOLUTIONS |
| title_sort |
hydrosol of c70 fullerene: synthesis and stability in electrolytic solutions |
| description |
This article is devoted to the synthesis and characterization of the hydrosol of C70 of the son/nC70 type and to its coagulation by sodium chloride and cetyltrimethylammonium bromide (CTAB). At C70 concentration of 3.3×10–6 M, the electrokinetic potential is ζ= –40 ± 4 mV, the particle size expressed as Zeta-average is 97±3 nm; at higher C70 concentrations, 1.7×10–5 and 6.9×10–5 M, the size stays the same: 99 – 100 nm. The critical concentration of coagulation (CCC) values, were determined using the diameter increasing rate (DIR) on NaCl concentration. The CCCs are concentration-dependent: 250, 145, and 130 mM at C70 concentrations 3.3×10–6, 1.7×10–5, and 6.9×10–5 M, respectively. The CCC for the CTAB surfactant is much lower, about 5×10–3 mM. At 0.02 mM CTAB, however, the overcharging up to ζ = + 40 mV and stabilization of the colloidal particles take place. Interpretation of the hydrosol coagulation by NaCl using the Derjaguin–Landau–Verwey–Overbeek theory makes it possible to determine the Hamaker constant of the C70–C70 interaction in vacuum, if only electrostatic repulsion and molecular attraction are taking into account: AFF ≈ 7×10–20 J. On the other hand, if we use the value AFF = (16.0–16.6)×10–20 J, obtained earlier in the study of organosols, then the data for hydrosols can be explained only by the introduction of an additional type of interactions. Following the terms of Churaev and Derjaguin, one should take into account the structural contribution to the interaction energy, which stabilizes the hydrosol. |
| publisher |
V.I.Vernadsky Institute of General and Inorganic Chemistry |
| publishDate |
2021 |
| url |
https://ucj.org.ua/index.php/journal/article/view/369 |
| work_keys_str_mv |
AT mchedlovpetrossyannikolay hydrosolofc70fullerenesynthesisandstabilityinelectrolyticsolutions AT marfuninmykyta hydrosolofc70fullerenesynthesisandstabilityinelectrolyticsolutions AT klochkovvolodymyr hydrosolofc70fullerenesynthesisandstabilityinelectrolyticsolutions AT radionovpetro hydrosolofc70fullerenesynthesisandstabilityinelectrolyticsolutions |
| first_indexed |
2025-09-24T17:43:41Z |
| last_indexed |
2025-09-24T17:43:41Z |
| _version_ |
1849658102448652288 |