dc.contributor.author | Das, Sushanta K. | |
dc.contributor.author | Sandanayaka, Atula S. D. | |
dc.contributor.author | Subbaiyan, Navaneetha K. | |
dc.contributor.author | Zandler, Melvin E. | |
dc.contributor.author | Ito, Osamu | |
dc.contributor.author | Souza, Francis D. | |
dc.date.accessioned | 2012-09-21T15:00:14Z | |
dc.date.available | 2012-09-21T15:00:14Z | |
dc.date.issued | 2012-09 | |
dc.identifier.citation | Das, 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.11388-11398 | en_US |
dc.identifier.issn | 0947-6539 | |
dc.identifier.other | WOS:000308310100031 | |
dc.identifier.uri | http://dx.doi.org/10.1002/chem.201200970 | |
dc.identifier.uri | http://hdl.handle.net/10057/5322 | |
dc.description | Click on the DOI link below to access the article (may not be free). | en_US |
dc.description.abstract | Covalent 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.iso | en_US | en_US |
dc.publisher | WILEY-V C H VERLAG GMBH, BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY | en_US |
dc.relation.ispartofseries | Chemistry-A European Journal;v.18 no.36 | |
dc.subject | charge separation | en_US |
dc.subject | electron transfer | en_US |
dc.subject | light-energy harvesting | en_US |
dc.subject | hotoelectrochemistry | en_US |
dc.subject | porphyrins | en_US |
dc.title | Functionalization of diameter-sorted semiconductive SWCNTs with photosensitizing porphyrins: syntheses and photoinduced electron transfer | en_US |
dc.type | Article | en_US |
dc.description.version | Peer reviewed | |
dc.rights.holder | Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim | |