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231223s2007 xx ||||| 00| ||eng c |
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|a pubmed25n0561.xml
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|a (DE-627)NLM168327023
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|a (NLM)17291018
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Zakharova, Lucia Ya
|e verfasserin
|4 aut
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|a Nanosized reactors based on polyethyleneimines
|b from microheterogeneous systems to immobilized catalysts
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|c 2007
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 06.07.2007
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Effective nanoreactors based on polyethyleneimines (PEIs) for the hydrolytic cleavage of O-alkyl O-p-nitrophenyl chloromethylphosphonates (alkyl = ethyl, hexyl) and di(p-nitrophenyl)phosphate were developed in conformity with the idea of modeling the polyfunctional catalytic mechanism of enzymes. A step-by-step modification of the single PEI solution by additives with their own catalytic activities (sodium dodecyl sulfate and lanthanum salt) gave rise to a marked improvement in the reaction efficiency. A 104-106-fold acceleration of the reaction compared to the aqueous basic hydrolysis of the substrates was achieved in the sodium dodecyl sulfate-polyethyleneimine-La(III) ternary system. This system can be considered to be metallomicelles immobilized on a hydrophilic polymer matrix. When the PEI immobilized on silica gel was used as a catalyst, the full completion of the reaction was achieved for 100 min under mild conditions, while the half-life of the reaction in a comparable homogeneous regime exceeds 100 h
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Enzymes
|2 NLM
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|a Micelles
|2 NLM
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|a Polymers
|2 NLM
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|a Salts
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|a Surface-Active Agents
|2 NLM
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|a Sodium Dodecyl Sulfate
|2 NLM
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|a 368GB5141J
|2 NLM
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|a Lanthanum
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|a 6I3K30563S
|2 NLM
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|a Polyethyleneimine
|2 NLM
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|a 9002-98-6
|2 NLM
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|a Ibragimova, Alsu R
|e verfasserin
|4 aut
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|a Valeeva, Farida G
|e verfasserin
|4 aut
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|a Zakharov, Andrey V
|e verfasserin
|4 aut
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|a Mustafina, Asiya R
|e verfasserin
|4 aut
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|a Kudryavtseva, Lyudmila A
|e verfasserin
|4 aut
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|a Harlampidi, Harlampy E
|e verfasserin
|4 aut
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|a Konovalov, Alexander I
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1991
|g 23(2007), 6 vom: 13. März, Seite 3214-24
|w (DE-627)NLM098181009
|x 0743-7463
|7 nnns
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| 773 |
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|g volume:23
|g year:2007
|g number:6
|g day:13
|g month:03
|g pages:3214-24
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