The Importance of Molecular Parameters of Quaternary Ammonium Salts in Their Antigibberellin (Retardant) Activity
作者:R. G. Gafurov、V. Yu. Grigor'ev、A. N. Proshin、V. G. Chistyakov、I. V. Martynov、N. S. Zefirov
DOI:10.1023/b:rubi.0000049778.67576.cc
日期:2004.11
The importance of six theoretically calculated molecular parameters in the antigibberellin (retardant) activity of quaternary ammonium salts is studied using a regression analysis. A bioassay system based on cell culture of fungus Gibberella fujikuroi is used to determine the activity. In the case of N,N,N-trimethyl-N(2-hydroxyethyl)ammonium chloride (choline) and N,N,N-triethyl-N-(2-hydroxyethyl)ammonium chloride (N,N,N-triethylcholine) derivatives with linear structure, the polarizability, proton acceptor activity, and lipophilicity of these compounds exert the largest effect on the antigibberellin activity. The antigibberellin activity of more sterically hindered N,N-dialkylpiperidinium salts was mainly defined by the steric parameter, while the polarizability, proton acceptor activity, and (through them) lipophilicity exert a lesser effect. Other parameters are of minor importance for the three groups of compounds studied.
[EN] CLAY STABILIZING COMPOSITIONS AND USE OF SAID COMPOSITIONS FOR STABILIZING WATER SENSITIVE FORMATIONS<br/>[FR] COMPOSITIONS DE STABILISATION DE L'ARGILE ET UTILISATION DESDITES COMPOSITIONS POUR STABILISER DES FORMATIONS SENSIBLES À L'EAU
申请人:TAMINCO BVBA
公开号:WO2016156559A1
公开(公告)日:2016-10-06
The present invention provides a clay stabilizing composition comprising a compound according to formula (I) and water, whereby R1, R2, R3, R4 are independently selected from H, alkyl, and whereby at least one of R1, R2, R3, R4 is alkyl; whereby R5, R6, R7 are independently selected from H, alkyl; and whereby X" comprises an anion. In addition, the present invention provides a method for controlling clay stability properties by contacting a clay stabilizing composition comprising a compound according to formula (I) and water with at least a part of a wellbore.
Shape-Selective Recognition of Quaternary Ammonium Chloride Ion Pairs
作者:Dong-Hao Li、Bradley D. Smith
DOI:10.1021/acs.joc.8b03197
日期:2019.3.1
Synthetic receptors that recognize ion pairs are potentially useful for many technical applications, but to date there has been little work on selectiverecognition of quaternary ammonium (Q+) ion pairs. This study measured the affinity of a tetralactammacrocycle for 11 different Q+·Cl– salts in chloroform solution. In each case, NMR spectroscopy was used to determine the association constant (Ka) and