1990
DOI: 10.1007/bf00652543
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The influence of hydrophobic solvation on the alkaline hydrolysis of ethyl esters of polar substituted 2-methylpropionic acids in water

Abstract: The rate constants of the alkaline hydrolysis of 2-methylpropionic acid ethyl ester, tx-hydroxy, ot-bromo, ct-cyano, and tx-nitro-2-

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Cited by 7 publications
(1 citation statement)
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“…Similar to our consideration, Pizem et al (Pizem et al, 2005) also pointed out that during the solution deposition process of a titanium film on polyimide substrates, reactive imide groups could be partially hydrolyzed and thereby influence the acidic oxide deposition solution. In our work, we found that the existence of polar sulfate and hydroxyl groups on irradiated PET regions would facilitate the alkaline hydrolysis to release more COOH groups in a weak base environment than unirradiated regions, because grafting of sulfate and hydroxyl groups onto the α site of the glycol ester (COOCH2CH2OOC) along PET chains would effectively increase the rate constant of the alkaline hydrolysis (Schmeer et al, 1990;Bruice et al, 1961 and1962), whereas this effect was not obvious on unirradiated regions without such polar groups. The existence of COOH groups on substrates would weaken the deposition of the ZnO layer (Hsu et al, 2005) because these COOH endgroups on polymer surface could firstly be deprotonated and negatively charged, and then preferentially bonded with HMT molecules to create electrostatic and/or steric screening for Fig.…”
Section: Zno Film Fabrication On Sulfated Hydroxylated and Caroxylatmentioning
confidence: 78%
“…Similar to our consideration, Pizem et al (Pizem et al, 2005) also pointed out that during the solution deposition process of a titanium film on polyimide substrates, reactive imide groups could be partially hydrolyzed and thereby influence the acidic oxide deposition solution. In our work, we found that the existence of polar sulfate and hydroxyl groups on irradiated PET regions would facilitate the alkaline hydrolysis to release more COOH groups in a weak base environment than unirradiated regions, because grafting of sulfate and hydroxyl groups onto the α site of the glycol ester (COOCH2CH2OOC) along PET chains would effectively increase the rate constant of the alkaline hydrolysis (Schmeer et al, 1990;Bruice et al, 1961 and1962), whereas this effect was not obvious on unirradiated regions without such polar groups. The existence of COOH groups on substrates would weaken the deposition of the ZnO layer (Hsu et al, 2005) because these COOH endgroups on polymer surface could firstly be deprotonated and negatively charged, and then preferentially bonded with HMT molecules to create electrostatic and/or steric screening for Fig.…”
Section: Zno Film Fabrication On Sulfated Hydroxylated and Caroxylatmentioning
confidence: 78%