Synthesis of higher aliphatic alkylpolyamines

Limanov, V. E.; Rapin, S. A.; Ivanov, S. B.

doi:10.1007/bf00758467

Cited by 2 publications

(3 citation statements)

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“…The Gemini surfactants C n H 2n+1 NH(CH 2 ) m NH 2 , where n = 10, 12, 14 and m = 3, 4) were synthesized as described in literature [37,38] using ethylenediamine, 1,3-diaminopropane, 1,4-diaminobutane, 1-bromodecane, 1-bromododecane, and 1-bromotetradecane (Aldrich). Absolute ethanol and deionized water were used as solvents for mesoporous molecular sieve synthesis.…”

Section: Methodsmentioning

confidence: 99%

“…Mesostructure Synthesis: The desired Gemini surfactant, prepared and purified according to literature procedures [37], was stirred in water to obtain a milky white solution. TEOS in ethanol was added gradually at room temperature to form a reaction mixture of the following molar composition: 1.0:0.25:77.7:3.5 TEOS/C n H 2n+1 NH(CH 2 ) m -NH 2 /H 2 O/EtOH.…”

Section: Methodsmentioning

confidence: 99%

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Lamellar Mesostructured Silicas with Chemically Significant Hierarchical Morphologies

Karkamkar¹,

Kim²,

Mahanti³

et al. 2004

Adv Funct Materials

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We describe the hierarchical structures of mesostructured silicas assembled from electrically neutral and unsymmetrical Gemini surfactants of the type CnH2n+1NH(CH2)mNH2 with n = 10, 12, 14 and m = 3, 4. As expected for Gemini surfactants with an all anti‐chain configuration and a packing parameter near 1.0, lamellar framework structures are formed, regardless of the length of the alkyl chain (n) and the number of carbon atoms (m) linking the two amino group centers. However, different layer curvatures and levels of hierarchical structure are observed depending on the delicate balance between the hydrophilic interactions at the surfactant head group–silica interface and the hydrophobic interactions between the surfactant alkyl groups. For Gemini derivatives with n = 12 or 14 and m = 3 or 4, well‐expressed hierarchical vesicles are formed that are analogous to those assembled previously from Gemini surfactants with m = 2. However, for n = 10, a new coiled slab structure (m = 3) and an onion‐like core–shell structure (m = 4) are formed. In addition, a previously unobserved stripe‐like silica structure is obtained from a C012+2+0 Gemini surfactant in combination with an α,ω‐diamine co‐surfactant. The relative stability of these hierarchical structures depends on the delicate competition between the long‐range elastic forces occurring in the hydrophobic region of the assembled surfactant and the short‐range chemical forces in the hydrophilic moiety. Lamellar silicas with hierarchical vesicular structures, the new coiled slab, and stripe‐like phases promise to be chemically significant morphologies, because they can minimize the framework pore length and provide optimal access to the framework walls under diffusion‐limited conditions.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Lamellar Mesostructured Silicas with Chemically Significant Hierarchical Morphologies

Karkamkar¹,

Kim²,

Mahanti³

et al. 2004

Adv Funct Materials

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“…N -lauroyl- l -glutamic acid [C 11 H 23 CONHCH(CO 2 H)C 2 H 4 CO 2 H] was supplied by Ajinomoto Co., Inc. Palmitic acid (C 15 H 31 CO 2 H), n -hexadecanethiol (C 16 H 33 SH), n -hexadecyltrimethylammonium bromide [C 16 H 33 N(CH 3 ) 3 Br], and 1-chlorohexadecane (C 16 H 33 Cl) were obtained from Tokyo Kasei Kogyo Co. Phosphoric acid (85% H 3 PO 4 ), calcium acetate monohydrate [Ca(OAc) 2 ·H 2 O], ethanol (EtOH), and ethylenediamine (NH 2 C 2 H 4 NH 2 ) were obtained from Wako Chemical Co. Diammonium hydrogenphosphate ((NH 4 ) 2 HPO 4 ) was obtained from Nacalai Tesque Co. 4-Dodecyldiethylenetriamine [C 12 H 25 N(C 2 H 4 NH 2 ) 2 , 80%] and tetramethylammonium hydroxide (TMAOH) pentahydrate [(CH 3 ) 4 NOH·5H 2 O] were obtained from ACROS. Calcium diisopropoxide [Ca(O i Pr) 2 ] was obtained from Kojundo Chemical Laboratory Co. n -Hexadecylethylenediamine (C 16 H 33 NHC 2 H 4 NH 2 ) was prepared according to the literature, by the reaction between C 16 H 33 Cl and NH 2 C 2 H 4 NH 2 .…”

Section: Methodsmentioning

confidence: 99%

Templating Route for Mesostructured Calcium Phosphates with Carboxylic Acid- and Amine-Type Surfactants

et al. 2008

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Mesostructured calcium phosphates constructed by ionic frameworks were synthesized using carboxylic acid- and amine-type surfactants in mixed solvent systems of ethanol and water. A lamellar mesostructured calcium phosphate was prepared using palmitic acid as an anionic surfactant, as in the case using n-alkylamines. A wormhole-like mesostructured calcium phosphate can be obtained using dicarboxyl N-lauroyl- l-glutamic acid, whose headgroup is larger than that of palmitic acid. Similar mesostructured product was obtained using 4-dodecyldiethylenetriamine with a large headgroup containing two primary amine groups. Interactions of carboxyl and primary amino groups in the surfactant molecules with inorganic species are quite important for the formation of mesostructured calcium phosphates. The Ca/P molar ratio of mesostructured calcium phosphates was strongly affected by the molecular structure of surfactants containing carboxyl and primary amino groups. Ca-rich materials can be obtained using carboxylic acid-type surfactants (Ca/P approximately 1.7) rather than amine-type surfactants (Ca/P approximately 1.0).

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Synthesis of higher aliphatic alkylpolyamines

Cited by 2 publications

References 0 publications

Lamellar Mesostructured Silicas with Chemically Significant Hierarchical Morphologies

Lamellar Mesostructured Silicas with Chemically Significant Hierarchical Morphologies

Templating Route for Mesostructured Calcium Phosphates with Carboxylic Acid- and Amine-Type Surfactants

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