Ion-Gated Synthetic Photosystems.
Identifieur interne : 000127 ( Main/Exploration ); précédent : 000126; suivant : 000128Ion-Gated Synthetic Photosystems.
Auteurs : RBID : pubmed:24689517Abstract
Herein, molecular strings of ions built along charge-transporting channels are shown to dramatically increase photocurrents and enable charge transport over long distances, thus confirming the existence and significance of ion-gated photosystems. For their synthesis, ordered and oriented stacks of naphthalenediimides were grown on indium tin oxide by ring-opening disulfide-exchange polymerization. To these charge-transporting channels, coaxial strings of anions or cations-fixed, mobile, complete, partial, pure, or mixed-were added by orthogonal hydrazone exchange. The presence of partially protonated carboxylates was found to most significantly increase activity, implying that they both attract holes and repel electrons, that is, facilitate photoinduced charge separation and hinder charge recombination at the same time. As a result of this quite remarkable situation, photocurrents increased rather than decreased with increasing charge stabilization on their "stepping stones." The presence of mobile anions facilitated long-distance charge transport through thick films. Turned off by inhibited anion mobility, that is, proton hopping, hole/proton antiport is identified to account for long-distance charge transport in ion-gated photosystems.
DOI: 10.1021/ja501389g
PubMed: 24689517
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Ion-Gated Synthetic Photosystems.</title><author><name sortKey="Sakai, Naomi" uniqKey="Sakai N">Naomi Sakai</name><affiliation wicri:level="1"><nlm:affiliation>Department of Organic Chemistry, University of Geneva , CH-1211 Geneva, Switzerland.</nlm:affiliation><country xml:lang="fr">Suisse</country><wicri:regionArea>Department of Organic Chemistry, University of Geneva , CH-1211 Geneva</wicri:regionArea></affiliation></author><author><name sortKey="Charbonnaz, Pierre" uniqKey="Charbonnaz P">Pierre Charbonnaz</name></author><author><name sortKey="Ward, Sandra" uniqKey="Ward S">Sandra Ward</name></author><author><name sortKey="Matile, Stefan" uniqKey="Matile S">Stefan Matile</name></author></titleStmt><publicationStmt><date when="2014">2014</date><idno type="doi">10.1021/ja501389g</idno><idno type="RBID">pubmed:24689517</idno><idno type="pmid">24689517</idno><idno type="wicri:Area/Main/Corpus">000086</idno><idno type="wicri:Area/Main/Curation">000086</idno><idno type="wicri:Area/Main/Exploration">000127</idno></publicationStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Herein, molecular strings of ions built along charge-transporting channels are shown to dramatically increase photocurrents and enable charge transport over long distances, thus confirming the existence and significance of ion-gated photosystems. For their synthesis, ordered and oriented stacks of naphthalenediimides were grown on indium tin oxide by ring-opening disulfide-exchange polymerization. To these charge-transporting channels, coaxial strings of anions or cations-fixed, mobile, complete, partial, pure, or mixed-were added by orthogonal hydrazone exchange. The presence of partially protonated carboxylates was found to most significantly increase activity, implying that they both attract holes and repel electrons, that is, facilitate photoinduced charge separation and hinder charge recombination at the same time. As a result of this quite remarkable situation, photocurrents increased rather than decreased with increasing charge stabilization on their "stepping stones." The presence of mobile anions facilitated long-distance charge transport through thick films. Turned off by inhibited anion mobility, that is, proton hopping, hole/proton antiport is identified to account for long-distance charge transport in ion-gated photosystems.</div></front></TEI><pubmed><MedlineCitation Status="Publisher" Owner="NLM"><PMID Version="1">24689517</PMID><DateCreated><Year>2014</Year><Month>4</Month><Day>2</Day></DateCreated><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1520-5126</ISSN><JournalIssue CitedMedium="Internet"><PubDate><Year>2014</Year><Month>Apr</Month><Day>1</Day></PubDate></JournalIssue><Title>Journal of the American Chemical Society</Title><ISOAbbreviation>J. Am. Chem. Soc.</ISOAbbreviation></Journal><ArticleTitle>Ion-Gated Synthetic Photosystems.</ArticleTitle><Pagination><MedlinePgn></MedlinePgn></Pagination><Abstract><AbstractText NlmCategory="UNLABELLED">Herein, molecular strings of ions built along charge-transporting channels are shown to dramatically increase photocurrents and enable charge transport over long distances, thus confirming the existence and significance of ion-gated photosystems. For their synthesis, ordered and oriented stacks of naphthalenediimides were grown on indium tin oxide by ring-opening disulfide-exchange polymerization. To these charge-transporting channels, coaxial strings of anions or cations-fixed, mobile, complete, partial, pure, or mixed-were added by orthogonal hydrazone exchange. The presence of partially protonated carboxylates was found to most significantly increase activity, implying that they both attract holes and repel electrons, that is, facilitate photoinduced charge separation and hinder charge recombination at the same time. As a result of this quite remarkable situation, photocurrents increased rather than decreased with increasing charge stabilization on their "stepping stones." The presence of mobile anions facilitated long-distance charge transport through thick films. Turned off by inhibited anion mobility, that is, proton hopping, hole/proton antiport is identified to account for long-distance charge transport in ion-gated photosystems.</AbstractText></Abstract><AuthorList><Author><LastName>Sakai</LastName><ForeName>Naomi</ForeName><Initials>N</Initials><Affiliation>Department of Organic Chemistry, University of Geneva , CH-1211 Geneva, Switzerland.</Affiliation></Author><Author><LastName>Charbonnaz</LastName><ForeName>Pierre</ForeName><Initials>P</Initials></Author><Author><LastName>Ward</LastName><ForeName>Sandra</ForeName><Initials>S</Initials></Author><Author><LastName>Matile</LastName><ForeName>Stefan</ForeName><Initials>S</Initials></Author></AuthorList><Language>ENG</Language><PublicationTypeList><PublicationType>JOURNAL ARTICLE</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2014</Year><Month>4</Month><Day>1</Day></ArticleDate></Article><MedlineJournalInfo><MedlineTA>J Am Chem Soc</MedlineTA><NlmUniqueID>7503056</NlmUniqueID><ISSNLinking>0002-7863</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>4</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>4</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2014</Year><Month>4</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>aheadofprint</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1021/ja501389g</ArticleId><ArticleId IdType="pubmed">24689517</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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