Multifunctional hydrolytic catalyses. xi. the hydrolysis of p-nitrophenyl acetate by a polysoap-bound bifunctional catalyst

Toyoki Kunitake, Tetsuo Sakamoto

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The catalytic hydrolysis of p-nitrophenyl acetate was studied in water at 30°C in the presence of a polysoap-bound bifunctional (LIMHA) catalyst. The polysoaps used were poly(vinylimidazole) quaternized with dodecyl and ethyl groups and poly(ethylenimine) partly quaternized with methyl and higher alkyl (C, C, C) groups. The catalysis proceeded via the acetyl transfer to the dissociated hydroxamate unit of the bifunctional catalyst and the subsequent decomposition of the intermediate by the neighboring imidazole. Catalysis was promoted well in the hydrophobic domain of the polysoap, but was less than that in the conventional cationic micelle of hexadecyltrimethylammonium bromide. The efficiency of the polysoap-bound bifunctional catalyst was ca. 1000 times greater than that of imidazole.

Original languageEnglish
Pages (from-to)871-877
Number of pages7
JournalPolymer Journal
Volume11
Issue number11
DOIs
Publication statusPublished - Jan 1 1979

Fingerprint

Hydrolysis
Catalysis
Catalysts
Micelles
Decomposition
Water
4-nitrophenyl acetate
imidazole
cetrimonium
aziridine

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Multifunctional hydrolytic catalyses. xi. the hydrolysis of p-nitrophenyl acetate by a polysoap-bound bifunctional catalyst. / Kunitake, Toyoki; Sakamoto, Tetsuo.

In: Polymer Journal, Vol. 11, No. 11, 01.01.1979, p. 871-877.

Research output: Contribution to journalArticle

@article{489540a5413440228ea4c11612a75767,
title = "Multifunctional hydrolytic catalyses. xi. the hydrolysis of p-nitrophenyl acetate by a polysoap-bound bifunctional catalyst",
abstract = "The catalytic hydrolysis of p-nitrophenyl acetate was studied in water at 30°C in the presence of a polysoap-bound bifunctional (LIMHA) catalyst. The polysoaps used were poly(vinylimidazole) quaternized with dodecyl and ethyl groups and poly(ethylenimine) partly quaternized with methyl and higher alkyl (C, C, C) groups. The catalysis proceeded via the acetyl transfer to the dissociated hydroxamate unit of the bifunctional catalyst and the subsequent decomposition of the intermediate by the neighboring imidazole. Catalysis was promoted well in the hydrophobic domain of the polysoap, but was less than that in the conventional cationic micelle of hexadecyltrimethylammonium bromide. The efficiency of the polysoap-bound bifunctional catalyst was ca. 1000 times greater than that of imidazole.",
author = "Toyoki Kunitake and Tetsuo Sakamoto",
year = "1979",
month = "1",
day = "1",
doi = "10.1295/polymj.11.871",
language = "English",
volume = "11",
pages = "871--877",
journal = "Polymer Journal",
issn = "0032-3896",
publisher = "Nature Publishing Group",
number = "11",

}

TY - JOUR

T1 - Multifunctional hydrolytic catalyses. xi. the hydrolysis of p-nitrophenyl acetate by a polysoap-bound bifunctional catalyst

AU - Kunitake, Toyoki

AU - Sakamoto, Tetsuo

PY - 1979/1/1

Y1 - 1979/1/1

N2 - The catalytic hydrolysis of p-nitrophenyl acetate was studied in water at 30°C in the presence of a polysoap-bound bifunctional (LIMHA) catalyst. The polysoaps used were poly(vinylimidazole) quaternized with dodecyl and ethyl groups and poly(ethylenimine) partly quaternized with methyl and higher alkyl (C, C, C) groups. The catalysis proceeded via the acetyl transfer to the dissociated hydroxamate unit of the bifunctional catalyst and the subsequent decomposition of the intermediate by the neighboring imidazole. Catalysis was promoted well in the hydrophobic domain of the polysoap, but was less than that in the conventional cationic micelle of hexadecyltrimethylammonium bromide. The efficiency of the polysoap-bound bifunctional catalyst was ca. 1000 times greater than that of imidazole.

AB - The catalytic hydrolysis of p-nitrophenyl acetate was studied in water at 30°C in the presence of a polysoap-bound bifunctional (LIMHA) catalyst. The polysoaps used were poly(vinylimidazole) quaternized with dodecyl and ethyl groups and poly(ethylenimine) partly quaternized with methyl and higher alkyl (C, C, C) groups. The catalysis proceeded via the acetyl transfer to the dissociated hydroxamate unit of the bifunctional catalyst and the subsequent decomposition of the intermediate by the neighboring imidazole. Catalysis was promoted well in the hydrophobic domain of the polysoap, but was less than that in the conventional cationic micelle of hexadecyltrimethylammonium bromide. The efficiency of the polysoap-bound bifunctional catalyst was ca. 1000 times greater than that of imidazole.

UR - http://www.scopus.com/inward/record.url?scp=0018543631&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0018543631&partnerID=8YFLogxK

U2 - 10.1295/polymj.11.871

DO - 10.1295/polymj.11.871

M3 - Article

VL - 11

SP - 871

EP - 877

JO - Polymer Journal

JF - Polymer Journal

SN - 0032-3896

IS - 11

ER -