Nonlinear absorption properties of 5,10-A2B2 porphyrins--correlation of molecular structure with the nonlinear responses.
Identifieur interne : 000512 ( Main/Exploration ); précédent : 000511; suivant : 000513Nonlinear absorption properties of 5,10-A2B2 porphyrins--correlation of molecular structure with the nonlinear responses.
Auteurs : RBID : pubmed:23503655English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Metals, Organometallic Compounds, Porphyrins, Trimethylsilyl Compounds.
- Halogenation, Spectrophotometry.
Abstract
The nonlinear absorption properties of two series of novel free base and metalated meso 5,10-A2B2 substituted porphyrins, both bearing p-tolyl as an A substituent and TMS-ethynyl or bromine as a B substituent, were investigated with the open Z-scan technique at 532 nm in the ns time regime. Most of the compounds exhibited a transmission drop with increasing input fluence. This behavior is desirable for their applications in optical limiting. More complex responses: a drop in transmission followed by an increase in transmission or an increase in transmission followed by a transmission drop, with increasing input fluence, were detected for certain compounds. All of the recorded responses were successfully fitted with a four-level model with simultaneous two-photon absorption arising from the higher excited states (consecutive one- + one- + two-photon absorption). The TMS-ethynyl group was found to be a more efficient meso substituent in optical limiting than the bromine atom. Indium, lead and zinc complexes with TMS-ethynyl substituents were the strongest positive nonlinear absorbers amongst compounds studied which makes them the most interesting candidates for optical limiting application.
DOI: 10.1039/c3pp25410k
PubMed: 23503655
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Most of the compounds exhibited a transmission drop with increasing input fluence. This behavior is desirable for their applications in optical limiting. More complex responses: a drop in transmission followed by an increase in transmission or an increase in transmission followed by a transmission drop, with increasing input fluence, were detected for certain compounds. All of the recorded responses were successfully fitted with a four-level model with simultaneous two-photon absorption arising from the higher excited states (consecutive one- + one- + two-photon absorption). The TMS-ethynyl group was found to be a more efficient meso substituent in optical limiting than the bromine atom. Indium, lead and zinc complexes with TMS-ethynyl substituents were the strongest positive nonlinear absorbers amongst compounds studied which makes them the most interesting candidates for optical limiting application.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">23503655</PMID><DateCreated><Year>2013</Year><Month>05</Month><Day>22</Day></DateCreated><DateCompleted><Year>2013</Year><Month>12</Month><Day>09</Day></DateCompleted><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1474-9092</ISSN><JournalIssue CitedMedium="Internet"><Volume>12</Volume><Issue>6</Issue><PubDate><Year>2013</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology</Title><ISOAbbreviation>Photochem. Photobiol. Sci.</ISOAbbreviation></Journal><ArticleTitle>Nonlinear absorption properties of 5,10-A2B2 porphyrins--correlation of molecular structure with the nonlinear responses.</ArticleTitle><Pagination><MedlinePgn>996-1007</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1039/c3pp25410k</ELocationID><Abstract><AbstractText>The nonlinear absorption properties of two series of novel free base and metalated meso 5,10-A2B2 substituted porphyrins, both bearing p-tolyl as an A substituent and TMS-ethynyl or bromine as a B substituent, were investigated with the open Z-scan technique at 532 nm in the ns time regime. Most of the compounds exhibited a transmission drop with increasing input fluence. This behavior is desirable for their applications in optical limiting. More complex responses: a drop in transmission followed by an increase in transmission or an increase in transmission followed by a transmission drop, with increasing input fluence, were detected for certain compounds. All of the recorded responses were successfully fitted with a four-level model with simultaneous two-photon absorption arising from the higher excited states (consecutive one- + one- + two-photon absorption). The TMS-ethynyl group was found to be a more efficient meso substituent in optical limiting than the bromine atom. Indium, lead and zinc complexes with TMS-ethynyl substituents were the strongest positive nonlinear absorbers amongst compounds studied which makes them the most interesting candidates for optical limiting application.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Zawadzka</LastName><ForeName>Monika</ForeName><Initials>M</Initials><Affiliation>School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland.</Affiliation></Author><Author ValidYN="Y"><LastName>Wang</LastName><ForeName>Jun</ForeName><Initials>J</Initials></Author><Author ValidYN="Y"><LastName>Blau</LastName><ForeName>Werner J</ForeName><Initials>WJ</Initials></Author><Author ValidYN="Y"><LastName>Senge</LastName><ForeName>Mathias O</ForeName><Initials>MO</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType><PublicationType>Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2013</Year><Month>03</Month><Day>18</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Photochem Photobiol Sci</MedlineTA><NlmUniqueID>101124451</NlmUniqueID><ISSNLinking>1474-905X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance>Metals</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance>Organometallic Compounds</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance>Porphyrins</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance>Trimethylsilyl Compounds</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName MajorTopicYN="N">Halogenation</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Metals</DescriptorName><QualifierName MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Organometallic Compounds</DescriptorName><QualifierName MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Porphyrins</DescriptorName><QualifierName MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Spectrophotometry</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N">Trimethylsilyl Compounds</DescriptorName><QualifierName MajorTopicYN="N">chemistry</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="aheadofprint"><Year>2013</Year><Month>3</Month><Day>18</Day></PubMedPubDate><PubMedPubDate PubStatus="epublish"><Year>2013</Year><Month>5</Month><Day>21</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2013</Year><Month>3</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2013</Year><Month>3</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2013</Year><Month>12</Month><Day>16</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1039/c3pp25410k</ArticleId><ArticleId IdType="pubmed">23503655</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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