NDLI: Modification of hollow core-shell particles with poly (amino) acids to induce chirality

Content Provider	IEEE Xplore Digital Library
Author	Chandren, S. Ohtani, B.
Copyright Year	2010
Description	Author affiliation: Catalysis Research Center, Hokkaido University, Japan (Chandren, S.; Ohtani, B.)
Abstract	Due to the potential environmental applications, photocatalytic reactions occurring on the surface of photoirradiated titanium (IV) oxide (TiO2) have garnered a wide interest [1, 2]. Despite displaying high photocatalytic activity, the utilization of TiO2 is limited by its lack of selectivity. To address this problem, Ikeda et al. [3, 4] conducted a study, in which they reported the fabrication of a novel core-shell composite photocatalyst which consisted of commercially available TiO2 particles incorporated into a hollow silica shell (SiO2/void/TiO2). The SiO2/void/TiO2 showed decomposition of small substrates but negligible activity for larger molecules. This composite also exhibited the ability to retain the intrinsic activity of original TiO2 for small substrates due to the presence of a void space between the TiO2 core and the hollow silica shell. In this study, platinized TiO2 core and hollow silica shell (SiO2/void/Pt-TiO2) were synthesized, and the silica pores were modified with chiral agents, namely poly (amino acid)s. The fabrication of the composite is firstly done by modifying the surface of TiO2 powder with amino groups using 3-amino-propyltrimethoxysilane (APS). To obtain carbon-coated TiO2, the amino-functionalized TiO2 was treated with aqueous glucose (carbon layer). Then n-(2-aminoethyl)-3-aminopropyl-trimethoxysilane (AEAPS) and tetraethyl orthosilicate (TEOS) (silica layer) was used to yield Si/C/TiO2, followed by heat treatment to remove the carbon layer to obtain SiO2/void/TiO2. As the synthesis of the SiO2/void/TiO2 is still on-going and yet to be successful, poly-L-lysine and poly (L-lactic acid) were impregnated on platinized TiO2 (ST-41) in order to study the effect of poly (amino) acids in inducing chirality. The resulting material and platinized TiO2 was tested out in the photocatalytic redox-combined synthesis of L-PCA (pipecolinic acid) from (racemic) DL-lysine in order to obtain optically active PCA [5]. The results show that platinized TiO2 modified with poly (L-lactic acid) displayed a higher optical purity of L-PCA as compared to normal platinized TiO2, although the conversion was slightly lower. Platinized TiO2 modified with poly-L-lysine on the other hand, demonstrated a much lower conversion percentage among the three samples prepared. This shows that poly (L-lactic acid) have potential in inducing chirality in SiO2/void/TiO2 in order to produce optically active PCA.
Starting Page	1
Ending Page	1
File Size	74083
Page Count	1
File Format	PDF
ISBN	9781424488537
e-ISBN	9781424488544
DOI	10.1109/ESCINANO.2010.5701064
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-01
Publisher Place	Malaysia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Principal component analysis
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Grafting Modification of the Reactive Core-Shell Particles to Enhance the Toughening Ability of Polylactide

Core–shell zeolite Y with ant-nest like hollow interior constructed by amino acids and enhanced catalytic activity

Heat-Mediated Transformation of $PMMA-SiO_{2}$ Core-Shell Particles into Hollow $SiO_{2}$ Particles

Core–Shell Nanostructures and CdS Hollow Spheres

Fabrication of Carbon Capsules with Hollow Macroporous Core/Mesoporous Shell Structures

Construction of PS/PNIPAM core-shell particles and hollow spheres by using hydrophobic interaction and thermosensitive phase separation

Monodisperse Temperature-Sensitive Microcontainers

Long-Range Interaction Analysis using Principal Component Analysis

Hollow Al2O3 Microspheres Derived from Al/AlOOH.nH2O Core-Shell Particles

Modification of hollow core-shell particles with poly (amino) acids to induce chirality

Similar Documents

Grafting Modification of the Reactive Core-Shell Particles to Enhance the Toughening Ability of Polylactide

Core–shell zeolite Y with ant-nest like hollow interior constructed by amino acids and enhanced catalytic activity

Heat-Mediated Transformation of $PMMA-SiO_{2}$ Core-Shell Particles into Hollow $SiO_{2}$ Particles

Core–Shell Nanostructures and CdS Hollow Spheres

Fabrication of Carbon Capsules with Hollow Macroporous Core/Mesoporous Shell Structures

Construction of PS/PNIPAM core-shell particles and hollow spheres by using hydrophobic interaction and thermosensitive phase separation

Monodisperse Temperature-Sensitive Microcontainers

Long-Range Interaction Analysis using Principal Component Analysis

Hollow Al2O3 Microspheres Derived from Al/AlOOH.nH2O Core-Shell Particles

Modification of hollow core-shell particles with poly (amino) acids to induce chirality