Synthesis of amino acid block-copolymer imprinted chiral mesoporous silica and its acoustically-induced optical Kerr effects

Pradip Paik, Yitzhak Mastai, Iwan Kityk, Piort Rakus, Aharon Gedanken

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14 Scopus citations

Abstract

Chiral mesoporous SiO 2 (CMS) have been synthesized and studied the Acoustically-Induced Optical Kerr Effects (AIOKE) and the results have been compared with non-chiral mesoporous silica. The CMS with controllable pore sizes (of ∼3 nm) and high surface areas of ca. 650 m 2g -1 was synthesized by mimicking the intrinsic chirality of the amino acid block copolymers. The chiral mesoporous materials were characterized through HRTEM, BET, small-angle XRD, 29Si-NMR and circular dichroism. AIOKE measurements have been performed using an Er:glass 20 ns laser with a 10 Hz frequency repetition. The optimal AIOKE results of the CMS were achieved for 9.7% of the chromophore in the matrices. We found that the AIOKE for the CMS mimicked with chiral block copolymers is quite high compared to the non-chiral SiO 2. A difference in AIOKE for these two compounds is observed, enabling CMS that can be used for the design of the acoustically-operated quantum electronic devices.

Original languageEnglish
Pages (from-to)127-131
Number of pages5
JournalJournal of Solid State Chemistry
Volume192
DOIs
StatePublished - Aug 2012

Bibliographical note

Funding Information:
We gratefully acknowledge the financial support from the ISRAEL SCIENCE FOUNDATION (ISF) (grant No. 660/07 ).

Funding

We gratefully acknowledge the financial support from the ISRAEL SCIENCE FOUNDATION (ISF) (grant No. 660/07 ).

FundersFunder number
Israel Science Foundation660/07

    Keywords

    • Block-copolymers
    • Chiral imprinting
    • Mesoporous silica
    • Optical Kerr effects

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