• Complex
  • Title
  • Keyword
  • Abstract
  • Scholars
  • Journal
  • ISSN
  • Conference
搜索

Author:

Xu, Guangpeng (Xu, Guangpeng.) | Jia, Bingying (Jia, Bingying.) | Xu, Bang (Xu, Bang.) | Bai, Shiyang (Bai, Shiyang.) | Sun, Jihong (Sun, Jihong.) (Scholars:孙继红) | Munir, Tallat (Munir, Tallat.)

Indexed by:

EI Scopus SCIE

Abstract:

Using poly(acrylic acid) (abbreviated as PAA) as a shell, bimodal mesoporous silicas (ab-breviated as BMMs) as a core, and bipyridine-proline (abbreviated as Z) as an active species, a facile approach for preparation of the P-Z@BMMs nanocomposites with core-shell structure was proposed, which was used as a suitable pH-sensitive catalyst for asymmetric aldol reaction between p-nitrobenzaldehyde and cyclohexanone. Their microstructural features and physicochem-ical properties were extensively characterized by various methods, such as powder X-ray diffraction patterns, N2 adsorption-desorption isotherms, the scanning (and transmission) electron microscopy images, the dynamic light scattering measurements, the thermogravimetric analysis, the elemental analysis, and the Fourier transform infrared spectroscopy spectra. Particularly, their fractal evolu-tion, the pair distance distribution function, and the Porod plots were demonstrated via the small -angle X-ray scattering patterns. The results elucidated that the PAA was successfully incorporated onto the external amino-modified surfaces of the mesoporous BMMs, and the particles having PAA grafted thereon had a pH-responsive shell in thickness of around 0.97 nm for controlled release of Z species by adjusting pH value of the reaction medium. Besides, the synthesized P-Z@BMMs pre-sented the satisfactory catalytic yields (around 80%) in comparison with the homo-and heteroge-neous catalytic system using Z or Z@BMMs as the catalysts.(c) 2023 The Author(s). Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Keyword:

pH -sensitive Bimodal mesoporous silicas Asymmetric aldol reaction Bipyridine-proline Fractal characteristic

Author Community:

  • [ 1 ] [Xu, Guangpeng]Beijing Univ Technol, Dept Chem Engn, Beijing Key Lab Green Catalysis & Separat, 100 PingLeYuan, Beijing 100124, Peoples R China
  • [ 2 ] [Jia, Bingying]Beijing Univ Technol, Dept Chem Engn, Beijing Key Lab Green Catalysis & Separat, 100 PingLeYuan, Beijing 100124, Peoples R China
  • [ 3 ] [Xu, Bang]Beijing Univ Technol, Dept Chem Engn, Beijing Key Lab Green Catalysis & Separat, 100 PingLeYuan, Beijing 100124, Peoples R China
  • [ 4 ] [Bai, Shiyang]Beijing Univ Technol, Dept Chem Engn, Beijing Key Lab Green Catalysis & Separat, 100 PingLeYuan, Beijing 100124, Peoples R China
  • [ 5 ] [Sun, Jihong]Beijing Univ Technol, Dept Chem Engn, Beijing Key Lab Green Catalysis & Separat, 100 PingLeYuan, Beijing 100124, Peoples R China
  • [ 6 ] [Munir, Tallat]Beijing Univ Technol, Dept Chem Engn, Beijing Key Lab Green Catalysis & Separat, 100 PingLeYuan, Beijing 100124, Peoples R China

Reprint Author's Address:

Show more details

Related Keywords:

Source :

ARABIAN JOURNAL OF CHEMISTRY

ISSN: 1878-5352

Year: 2023

Issue: 8

Volume: 16

6 . 0 0 0

JCR@2022

ESI Discipline: CHEMISTRY;

ESI HC Threshold:20

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 1

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

Affiliated Colleges:

Online/Total:720/5300032
Address:BJUT Library(100 Pingleyuan,Chaoyang District,Beijing 100124, China Post Code:100124) Contact Us:010-67392185
Copyright:BJUT Library Technical Support:Beijing Aegean Software Co., Ltd.