Functionalization of diameter-sorted semiconductive SWCNTs with photosensitizing porphyrins: syntheses and photoinduced electron transfer

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