Mostrar el registro sencillo del ítem
dc.contributor.author
Xia, Pan
dc.contributor.author
Huang, Zhiyuan
dc.contributor.author
Li, Xin
dc.contributor.author
Romero, Juan José
dc.contributor.author
Vullev, Valentine I.
dc.contributor.author
Pau, George Shu Heng
dc.contributor.author
Tang, Ming Lee
dc.date.available
2018-07-17T21:20:13Z
dc.date.issued
2017-01
dc.identifier.citation
Xia, Pan; Huang, Zhiyuan; Li, Xin; Romero, Juan José; Vullev, Valentine I.; et al.; On the efficacy of anthracene isomers for triplet transmission from CdSe nanocrystals; Royal Society of Chemistry; Chemical Communications; 53; 7; 1-2017; 1241-1244
dc.identifier.issn
1359-7345
dc.identifier.uri
http://hdl.handle.net/11336/52537
dc.description.abstract
The effect of isomeric substitutions on the transmitter for triplet energy transfer (TET) between nanocrystal (NC) donor and molecular acceptor is investigated. Each isomeric acceptor is expected to bind in a unique orientation with respect to the NC donor. We see that this orbital overlap drastically affects the transmission of triplets. Here, two functional groups, the carboxylic acid and dithiocarbamate, were varied between the 1-, 2- and 9-positions of the anthracene ring to give three ACA and three ADTC isomers. These six anthracene isomers served as transmitters for triplets between CdSe NC sensitizers and 9,10-diphenylanthracene annihilators for photon upconversion. The photon upconversion quantum yield (QY) is the highest for 9-ACA (12%), lowest for 9-ADTC (0.1%), around 3% for both 1-ACA and 1-ADTC, and about 1% for the 2-isomers. These trends in QYs are reflected in the rates of TET given by ultrafast transient absorption spectroscopy where a maximum of 3.8 × 107 s−1 for 9-ACA was measured. Molecular excited state energy levels were measured both in solution and polymer hosts to correlate structure to TET. This work confirms that anthracene excited states levels are very sensitive to molecular substitution, which in combination with orbital overlap, critically affect Dexter-based TET.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Royal Society of Chemistry
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Quantum Dots
dc.subject
Triplet Transmission
dc.subject
Solar Energy Conversion
dc.subject.classification
Nano-materiales
dc.subject.classification
Nanotecnología
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
On the efficacy of anthracene isomers for triplet transmission from CdSe nanocrystals
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-06-25T01:05:00Z
dc.journal.volume
53
dc.journal.number
7
dc.journal.pagination
1241-1244
dc.journal.pais
Reino Unido
dc.description.fil
Fil: Xia, Pan. University of California; Estados Unidos
dc.description.fil
Fil: Huang, Zhiyuan. University of California; Estados Unidos
dc.description.fil
Fil: Li, Xin. University of California; Estados Unidos
dc.description.fil
Fil: Romero, Juan José. University of California; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Vullev, Valentine I.. University of California; Estados Unidos
dc.description.fil
Fil: Pau, George Shu Heng. Lawrence Berkeley National Laboratory; Estados Unidos
dc.description.fil
Fil: Tang, Ming Lee. University of California; Estados Unidos
dc.journal.title
Chemical Communications
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1039/C6CC08229G
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/Content/ArticleLanding/2017/CC/C6CC08229G
Archivos asociados