Self-assembling systems based on amphiphilic alkyltriphenylphosphonium bromides: Elucidation of the role of head group

Gainanova, G. A.; Vagapova, Guzalia I.; Syakaev, Victor V.; Ibragimova, A. R.; Валеева, Ф. Г.; Tudriy, Elena V.; Галкина, И. В.; Kataeva, О. N.; Zakharova, L. Ya.; Latypov, Shamil K.; Коновалов, А. И.

doi:10.1016/j.jcis.2011.10.074

Cited by 67 publications

(39 citation statements)

References 80 publications

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“…[21,22] Полиэтиленимин (ПЭИ, МM = 50000) и полиэтиленгликоль (ПЭГ, ММ = 20000) («Sigma-Aldrich») использованы без предварительной очистки. Использован-ные в работе полиэтиленгликоль и полиэтиленимин являют-ся гидрофильными полимерами, существующими в водном растворе в виде клубков с радиусами инерции 4.5 и 7 нм, со-ответственно.…”

Section: экспериментальная частьunclassified

“…Аналогичное явление наблюдали в других раство-рах катионных ПАВ со стерически загруженной головной группой, в том числе ТФФБ. [22] Это, вероятно, связано с частичной ионизацией молекул воды в сольватных обо-лочках под действием кооперативного заряда агрегатов с образованием гидроксид-анионов, которые электростати-чески связываются с головными группами, и свободных протонов, снижающих значение рН среды. Предположи-тельно, в молекуле КФ фосфониевая группа выступает в качестве головной группы, а ассоциация происходит за счет водородных связей между гидроксильными группа-ми макроциклической платформы.…”

Section: результаты и их обсуждениеunclassified

“…Для выявления роли макроциклической платформы проведено сравнение данных по ассоциации фосфорсо-держащего каликсарена в отсутствие и в присутствии полимеров со свойствами систем на основе цетилтрифе-нилфосфоний бромида (ТФФБ-16), для которого имеют-ся опубликованные нами результаты в индивидуальном растворе [22] и смешанной композиции ТФФБ-16 -ПЭГ, [23] а также данные для системы ТФФБ-16 -ПЭИ. В Таблице 1 приведены значения ККА для индивидуальных и сме-шанных систем на основе каликсарена и ТФФБ-16 с ги-дрофильными полимерами.…”

Section: результаты и их обсуждениеunclassified

“…Добавки полимеров по-разному влияют на значения ККА. Изотерма поверхностного натяжения системы КФ-ПЭГ не имеет перелома, характеризую- 03 -*Данные опубликованы [22] **Данные опубликованы [23] Aggregation in a Binary System Based on Calix[4]resorcinol щего ККА. Это связано, вероятно, с тем, что значение ККА сдвинулось в область высоких концентраций, ко-торые в нашем случае приготовить не удалось.…”

Section: результаты и их обсуждениеunclassified

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Aggregation in a Binary System Based on Calix[4]resorcinol with Phosphonium Groups and Hydrophilic Polymers

Gaynanova¹,

Vagapova²,

Knyazeva³

et al. 2016

MHC

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Section: экспериментальная частьunclassified

Section: результаты и их обсуждениеunclassified

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Aggregation in a Binary System Based on Calix[4]resorcinol with Phosphonium Groups and Hydrophilic Polymers

Gaynanova¹,

Vagapova²,

Knyazeva³

et al. 2016

MHC

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“…Surfactants with charged nitrogen (TMA and DABCO series) showed very similar cmc's of around 1 mM, while phosphonium salts demonstrated much lower cmc values. 3,5 The advantages in terms of micellization capacity may result in more effective functional activity. Therefore, the purpose of this study is to compare their binding capacity toward different guests, including hydrophobic organic substrates and an oligonucleotide.…”

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Comparative Study of Aqueous Solutions of Cationic Surfactants: Structure/Activity Relation in Their Aggregation and Solubilization Behavior and Complexation with an Oligonucleotide

et al. 2012

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For mono-and dicationic surfactants with trimethylammonium (TMA), triphenylphosphonium (TPP), and 4-aza-1-alkyl-1-azoniabicyclo[2.2.2]octane (DABCO) polar groups, and also for pyrimidinic amphiphiles, a correlation is revealed between their aggregation and solubilization properties and their complexation capacity toward an oligonucleotide. Mixed cationic surfactantcalixarene systems demonstrate controllable binding/ release properties.Cationic surfactants are very attractive for the design of catalytic systems, analytical separation, antimicrobial compositions, and synthetic vectors for gene delivery.1,2 In these strategies, the capacity of surfactants to adsorb on surfaces or to bind guest molecules is utilized. Nanocontainers based on surfactants are noncovalently bound dynamic structures, and they should therefore be competitive with carriers based on covalently formed polymer containers and polyelectrolyte capsules fabricated by the layer-by-layer technique. The advantages of surfactant-based nanocontainers are their easy preparation, versatile uses, controlled morphology and size, low required concentration, and biocompatibility. Therefore, to be competitive from the viewpoint of current technologies, cationic surfactants have to meet the above criteria and exhibit high micellization and solubilization capacities and low toxicity. The morphology of aggregates, their binding capacity, and hence, their functional activity depend to a great extent on the chemical structure of amphiphiles. Herein, micellar systems based on cationic surfactants are studied with variation of the nature of the charge atoms. In particular, mono-and dicationic surfactants with trimethylammonium (TMA-n), triphenylphosphonium (TPP-n), and 4-aza-1-alkyl-1-azoniabicyclo[2.2.2]octane (DABCO-n) polar groups, as well as pyrimidinic mono-and dicationic amphiphiles, are considered, with the number of carbon atoms in the alkyl chain n varied from 8 to 18. The data obtained are exemplified by the hexadecyl derivatives TMA-16, Generally, different methods are used to estimate the aggregation behavior, in particular, tensiometry, conductometry, NMR self-diffusion, dye solubilization studies, and so on. The data obtained are analyzed in terms of the concentration dependences of the measured parameters, and breakpoints in the plots are identified as critical micelle concentrations (cmc's). These values indicate the onset of micellization in the systems. In our earlier works, 36 the micellization of cationic surfactants with different headgroups was studied through a combination of methods. Surfactants with charged nitrogen (TMA and DABCO series) showed very similar cmc's of around 1 mM, while phosphonium salts demonstrated much lower cmc values.3,5 The advantages in terms of micellization capacity may result in more effective functional activity. Therefore, the purpose of this study is to compare their binding capacity toward different guests, including hydrophobic organic substrates and an oligonucleotide.As seen in Figure 1, a higher solubiliza...

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Aggregation behavior of alkyl triphenyl phosphonium bromides in aprotic and protic ionic liquids

Lü

Shi

et al. 2013

Colloid Polym Sci

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Self-assembling systems based on amphiphilic alkyltriphenylphosphonium bromides: Elucidation of the role of head group

Cited by 67 publications

References 80 publications

Aggregation in a Binary System Based on Calix[4]resorcinol with Phosphonium Groups and Hydrophilic Polymers

Aggregation in a Binary System Based on Calix[4]resorcinol with Phosphonium Groups and Hydrophilic Polymers

Comparative Study of Aqueous Solutions of Cationic Surfactants: Structure/Activity Relation in Their Aggregation and Solubilization Behavior and Complexation with an Oligonucleotide

Aggregation behavior of alkyl triphenyl phosphonium bromides in aprotic and protic ionic liquids

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