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dc.contributor.authorDas, Sushanta K.
dc.contributor.authorSandanayaka, Atula S. D.
dc.contributor.authorSubbaiyan, Navaneetha K.
dc.contributor.authorZandler, Melvin E.
dc.contributor.authorIto, Osamu
dc.contributor.authorSouza, Francis D.
dc.date.accessioned2012-09-21T15:00:14Z
dc.date.available2012-09-21T15:00:14Z
dc.date.issued2012-09
dc.identifier.citationDas, Sushanta K.; Sandanayaka, Atula S. D.; Subbaiyan, Navaneetha K.; Zandler, Melvin E.; Ito, Osamu; Souza, Francis D. 2012. Functionalization of Diameter-Sorted Semiconductive SWCNTs with Photosensitizing Porphyrins: Syntheses and Photoinduced Electron Transfer, v.18 no. 36 pp.11388-11398en_US
dc.identifier.issn0947-6539
dc.identifier.otherWOS:000308310100031
dc.identifier.urihttp://dx.doi.org/10.1002/chem.201200970
dc.identifier.urihttp://hdl.handle.net/10057/5322
dc.descriptionClick on the DOI link below to access the article (may not be free).en_US
dc.description.abstractCovalent functionalization of diameter sorted SWCNTs with porphyrins (MP), and photochemistry to establish nanotube diameter-dependent charge separation efficiencies are reported. The MP-SWCNT(n, m) [M = 2H or Zn, and (n, m)=(7,6) or (6,5)] nanohybrids are characterized by a variety of spectroscopic, thermogravimetric, TEM imaging techniques, and also by DFT MO calculations. The thermogravimetric, Raman and fluorescence studies reveal the presence of a moderate number of porphyrins on the SWCNT surface. The MO results suggest charge separation (CS) via the excited state of MP. Time-resolved fluorescence studies reveal quenching of the singlet excited state of the MP with SWCNT(n, m), giving the rate constants of charge separation (k(CS)) in the range of (4-5) x 10(9) s(-1). Nanosecond transient absorption measurements confirm the charge-separated radical cation and the radical anion as [MPC center dot+ -SWCNT center dot-] with their characteristic absorption bands in the visible and near-IR regions. The charge separated states persist for about 70-100 ns thus giving an opportunity to utilize them to build photoelectrochemical cells, which allowed us to derive the structure-reactivity relationship between the nature of porphyrin and diameter of the employed nanotubes.en_US
dc.language.isoen_USen_US
dc.publisherWILEY-V C H VERLAG GMBH, BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYen_US
dc.relation.ispartofseriesChemistry-A European Journal;v.18 no.36
dc.subjectcharge separationen_US
dc.subjectelectron transferen_US
dc.subjectlight-energy harvestingen_US
dc.subjecthotoelectrochemistryen_US
dc.subjectporphyrinsen_US
dc.titleFunctionalization of diameter-sorted semiconductive SWCNTs with photosensitizing porphyrins: syntheses and photoinduced electron transferen_US
dc.typeArticleen_US
dc.description.versionPeer reviewed
dc.rights.holderCopyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


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