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Creation of Chiral Thixotropic Gels through a Crown-Ammonium Interaction and their Application to a Memory-Erasing Recycle System
A unique class of oligothiophene‐based organogelator bearing two crown ethers at both ends was synthesized. This compound could gelatinize several organic solvents, forming one‐dimensional fibrous aggregates. From the observation of circular dichroism, it was confirmed that the helical handedness of...
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Published in: | Chemistry : a European journal 2012-03, Vol.18 (10), p.2832-2838 |
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creator | Sobczuk, Adam A. Tsuchiya, Youichi Shiraki, Tomohiro Tamaru, Shun-ichi Shinkai, Seiji |
description | A unique class of oligothiophene‐based organogelator bearing two crown ethers at both ends was synthesized. This compound could gelatinize several organic solvents, forming one‐dimensional fibrous aggregates. From the observation of circular dichroism, it was confirmed that the helical handedness of the fibrous assembly is controllable by the chirality of 1,2bisammonium guests, thus suggesting that one guest molecule bridges two gelator molecules through the crown–ammonium interaction. Interestingly, we have found that such chirality is created by thermal gelation, whereas it disappears by thixotropic gelation. The new finding implies that the present organogel system is applicable as a reversible switching memory device, featuring memory creation by a heat mode and memory erasing by a mechanical mode.
Chiral memory switching: A unique class of functional organogelator based on crown ether appended oligothiophene was created, the chirality of which was influenced by the interaction with chiral ammonium guests. Stimuli‐induced circular dichroism with controlled handedness of aggregates was observed. The reversibility of thixotropic/thermal behaviors can be applied to chirality switching memory devices (see scheme). |
doi_str_mv | 10.1002/chem.201103249 |
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Chiral memory switching: A unique class of functional organogelator based on crown ether appended oligothiophene was created, the chirality of which was influenced by the interaction with chiral ammonium guests. Stimuli‐induced circular dichroism with controlled handedness of aggregates was observed. The reversibility of thixotropic/thermal behaviors can be applied to chirality switching memory devices (see scheme).</description><identifier>ISSN: 0947-6539</identifier><identifier>EISSN: 1521-3765</identifier><identifier>DOI: 10.1002/chem.201103249</identifier><identifier>PMID: 22290582</identifier><identifier>CODEN: CEUJED</identifier><language>eng</language><publisher>Weinheim: WILEY-VCH Verlag</publisher><subject>Chemistry ; Chirality ; Circular Dichroism ; Circularity ; crown compounds ; Crown ethers ; Crown Ethers - chemical synthesis ; Crown Ethers - chemistry ; Data storage ; Dichroism ; Gels - chemical synthesis ; Gels - chemistry ; Handedness ; Memory devices ; Models, Molecular ; Molecular Structure ; Quaternary Ammonium Compounds - chemistry ; self-assembly ; sol-gel processes ; supramolecular chemistry ; Switching ; Thiophenes - chemical synthesis ; Thiophenes - chemistry</subject><ispartof>Chemistry : a European journal, 2012-03, Vol.18 (10), p.2832-2838</ispartof><rights>Copyright © 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim</rights><rights>Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.</rights><rights>Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4809-ffa62082ae3c296ed1e4007a468f7fff83564e2433d47b0aef30bb1ba0a8bbfd3</citedby><cites>FETCH-LOGICAL-c4809-ffa62082ae3c296ed1e4007a468f7fff83564e2433d47b0aef30bb1ba0a8bbfd3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22290582$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Sobczuk, Adam A.</creatorcontrib><creatorcontrib>Tsuchiya, Youichi</creatorcontrib><creatorcontrib>Shiraki, Tomohiro</creatorcontrib><creatorcontrib>Tamaru, Shun-ichi</creatorcontrib><creatorcontrib>Shinkai, Seiji</creatorcontrib><title>Creation of Chiral Thixotropic Gels through a Crown-Ammonium Interaction and their Application to a Memory-Erasing Recycle System</title><title>Chemistry : a European journal</title><addtitle>Chem. Eur. J</addtitle><description>A unique class of oligothiophene‐based organogelator bearing two crown ethers at both ends was synthesized. This compound could gelatinize several organic solvents, forming one‐dimensional fibrous aggregates. From the observation of circular dichroism, it was confirmed that the helical handedness of the fibrous assembly is controllable by the chirality of 1,2bisammonium guests, thus suggesting that one guest molecule bridges two gelator molecules through the crown–ammonium interaction. Interestingly, we have found that such chirality is created by thermal gelation, whereas it disappears by thixotropic gelation. The new finding implies that the present organogel system is applicable as a reversible switching memory device, featuring memory creation by a heat mode and memory erasing by a mechanical mode.
Chiral memory switching: A unique class of functional organogelator based on crown ether appended oligothiophene was created, the chirality of which was influenced by the interaction with chiral ammonium guests. Stimuli‐induced circular dichroism with controlled handedness of aggregates was observed. The reversibility of thixotropic/thermal behaviors can be applied to chirality switching memory devices (see scheme).</description><subject>Chemistry</subject><subject>Chirality</subject><subject>Circular Dichroism</subject><subject>Circularity</subject><subject>crown compounds</subject><subject>Crown ethers</subject><subject>Crown Ethers - chemical synthesis</subject><subject>Crown Ethers - chemistry</subject><subject>Data storage</subject><subject>Dichroism</subject><subject>Gels - chemical synthesis</subject><subject>Gels - chemistry</subject><subject>Handedness</subject><subject>Memory devices</subject><subject>Models, Molecular</subject><subject>Molecular Structure</subject><subject>Quaternary Ammonium Compounds - chemistry</subject><subject>self-assembly</subject><subject>sol-gel processes</subject><subject>supramolecular chemistry</subject><subject>Switching</subject><subject>Thiophenes - chemical synthesis</subject><subject>Thiophenes - chemistry</subject><issn>0947-6539</issn><issn>1521-3765</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkUtv1DAURiMEokNhyxJZYgGbDNePxPFyFKbTSm15FbG0nMx1xyWJp3aiNsv-86ZMGSEWsPLmnCP5fknymsKcArAP9QbbOQNKgTOhniQzmjGacplnT5MZKCHTPOPqIHkR4xUAqJzz58kBY0xBVrBZclcGNL3zHfGWlBsXTEMuNu7W98FvXU1W2ETSb4IfLjfEkDL4my5dtK3v3NCSk67HYOpfvunWE4gukMV227h6V-39ZJ1h68OYLoOJrrskX7Ee6wbJtzH22L5MnlnTRHz1-B4m34-WF-VxevppdVIuTtNaFKBSa03OoGAGec1UjmuKAkAakRdWWmsLnuUCmeB8LWQFBi2HqqKVAVNUlV3zw-TdrrsN_nrA2OvWxRqbxnToh6jVdL9c0JxN5Pt_klTKAoQCyCb07V_olR9CN_1DU54xDlIVcqLmO6oOPsaAVm-Da00YNQX9MKN-mFHvZ5yEN4_ZoWpxvcd_7zYBagfcuAbH_-R0ebw8-zOe7lw3nf9275rwU-eSy0z_OF9p8fnj0TnjX3TG7wFHGbk7</recordid><startdate>20120305</startdate><enddate>20120305</enddate><creator>Sobczuk, Adam A.</creator><creator>Tsuchiya, Youichi</creator><creator>Shiraki, Tomohiro</creator><creator>Tamaru, Shun-ichi</creator><creator>Shinkai, Seiji</creator><general>WILEY-VCH Verlag</general><general>WILEY‐VCH Verlag</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>K9.</scope><scope>7X8</scope></search><sort><creationdate>20120305</creationdate><title>Creation of Chiral Thixotropic Gels through a Crown-Ammonium Interaction and their Application to a Memory-Erasing Recycle System</title><author>Sobczuk, Adam A. ; Tsuchiya, Youichi ; Shiraki, Tomohiro ; Tamaru, Shun-ichi ; Shinkai, Seiji</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4809-ffa62082ae3c296ed1e4007a468f7fff83564e2433d47b0aef30bb1ba0a8bbfd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Chemistry</topic><topic>Chirality</topic><topic>Circular Dichroism</topic><topic>Circularity</topic><topic>crown compounds</topic><topic>Crown ethers</topic><topic>Crown Ethers - chemical synthesis</topic><topic>Crown Ethers - chemistry</topic><topic>Data storage</topic><topic>Dichroism</topic><topic>Gels - chemical synthesis</topic><topic>Gels - chemistry</topic><topic>Handedness</topic><topic>Memory devices</topic><topic>Models, Molecular</topic><topic>Molecular Structure</topic><topic>Quaternary Ammonium Compounds - chemistry</topic><topic>self-assembly</topic><topic>sol-gel processes</topic><topic>supramolecular chemistry</topic><topic>Switching</topic><topic>Thiophenes - chemical synthesis</topic><topic>Thiophenes - chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sobczuk, Adam A.</creatorcontrib><creatorcontrib>Tsuchiya, Youichi</creatorcontrib><creatorcontrib>Shiraki, Tomohiro</creatorcontrib><creatorcontrib>Tamaru, Shun-ichi</creatorcontrib><creatorcontrib>Shinkai, Seiji</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>MEDLINE - Academic</collection><jtitle>Chemistry : a European journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sobczuk, Adam A.</au><au>Tsuchiya, Youichi</au><au>Shiraki, Tomohiro</au><au>Tamaru, Shun-ichi</au><au>Shinkai, Seiji</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Creation of Chiral Thixotropic Gels through a Crown-Ammonium Interaction and their Application to a Memory-Erasing Recycle System</atitle><jtitle>Chemistry : a European journal</jtitle><addtitle>Chem. Eur. J</addtitle><date>2012-03-05</date><risdate>2012</risdate><volume>18</volume><issue>10</issue><spage>2832</spage><epage>2838</epage><pages>2832-2838</pages><issn>0947-6539</issn><eissn>1521-3765</eissn><coden>CEUJED</coden><abstract>A unique class of oligothiophene‐based organogelator bearing two crown ethers at both ends was synthesized. This compound could gelatinize several organic solvents, forming one‐dimensional fibrous aggregates. From the observation of circular dichroism, it was confirmed that the helical handedness of the fibrous assembly is controllable by the chirality of 1,2bisammonium guests, thus suggesting that one guest molecule bridges two gelator molecules through the crown–ammonium interaction. Interestingly, we have found that such chirality is created by thermal gelation, whereas it disappears by thixotropic gelation. The new finding implies that the present organogel system is applicable as a reversible switching memory device, featuring memory creation by a heat mode and memory erasing by a mechanical mode.
Chiral memory switching: A unique class of functional organogelator based on crown ether appended oligothiophene was created, the chirality of which was influenced by the interaction with chiral ammonium guests. Stimuli‐induced circular dichroism with controlled handedness of aggregates was observed. The reversibility of thixotropic/thermal behaviors can be applied to chirality switching memory devices (see scheme).</abstract><cop>Weinheim</cop><pub>WILEY-VCH Verlag</pub><pmid>22290582</pmid><doi>10.1002/chem.201103249</doi><tpages>7</tpages></addata></record> |
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subjects | Chemistry Chirality Circular Dichroism Circularity crown compounds Crown ethers Crown Ethers - chemical synthesis Crown Ethers - chemistry Data storage Dichroism Gels - chemical synthesis Gels - chemistry Handedness Memory devices Models, Molecular Molecular Structure Quaternary Ammonium Compounds - chemistry self-assembly sol-gel processes supramolecular chemistry Switching Thiophenes - chemical synthesis Thiophenes - chemistry |
title | Creation of Chiral Thixotropic Gels through a Crown-Ammonium Interaction and their Application to a Memory-Erasing Recycle System |
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