Crossover from single-step tunneling to multistep hopping for molecular triplet energy transfer

Josh Vura-Weis, Sameh H. Abdelwahed, Ruchi Shukla, Rajendra Rathore, Mark A Ratner, Michael R Wasielewski

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

Triplet energy transfer (TT), a key process in molecular and organic electronics, generally occurs by either strongly distance-dependent single-step tunneling or weakly distance-dependent multistep hopping. We have synthesized a series of p-stacked molecules consisting of a benzophenone donor, one to three fluorene bridges, and a naphthalene acceptor, and studied the rate of TT from benzophenone to naphthalene across the fluorene bridge using femtosecond transient absorption spectroscopy. We show that the dominant TT mechanism switches from tunneling to wire-like hopping between bridge lengths 1 and 2. The crossover observed for TT can be determined by direct observation of the bridge-occupied state. Copyright Science 2010 by the American Association for the Advancement of Science; all rights reserved.

Original languageEnglish
Pages (from-to)1547-1550
Number of pages4
JournalScience
Volume328
Issue number5985
DOIs
Publication statusPublished - Jun 18 2010

Fingerprint

Energy Transfer
Spectrum Analysis
Observation
Tissue Donors
fluorene
benzophenone
naphthalene

ASJC Scopus subject areas

  • General

Cite this

Crossover from single-step tunneling to multistep hopping for molecular triplet energy transfer. / Vura-Weis, Josh; Abdelwahed, Sameh H.; Shukla, Ruchi; Rathore, Rajendra; Ratner, Mark A; Wasielewski, Michael R.

In: Science, Vol. 328, No. 5985, 18.06.2010, p. 1547-1550.

Research output: Contribution to journalArticle

Vura-Weis, Josh ; Abdelwahed, Sameh H. ; Shukla, Ruchi ; Rathore, Rajendra ; Ratner, Mark A ; Wasielewski, Michael R. / Crossover from single-step tunneling to multistep hopping for molecular triplet energy transfer. In: Science. 2010 ; Vol. 328, No. 5985. pp. 1547-1550.
@article{c1445055f187418689018b520387990c,
title = "Crossover from single-step tunneling to multistep hopping for molecular triplet energy transfer",
abstract = "Triplet energy transfer (TT), a key process in molecular and organic electronics, generally occurs by either strongly distance-dependent single-step tunneling or weakly distance-dependent multistep hopping. We have synthesized a series of p-stacked molecules consisting of a benzophenone donor, one to three fluorene bridges, and a naphthalene acceptor, and studied the rate of TT from benzophenone to naphthalene across the fluorene bridge using femtosecond transient absorption spectroscopy. We show that the dominant TT mechanism switches from tunneling to wire-like hopping between bridge lengths 1 and 2. The crossover observed for TT can be determined by direct observation of the bridge-occupied state. Copyright Science 2010 by the American Association for the Advancement of Science; all rights reserved.",
author = "Josh Vura-Weis and Abdelwahed, {Sameh H.} and Ruchi Shukla and Rajendra Rathore and Ratner, {Mark A} and Wasielewski, {Michael R}",
year = "2010",
month = "6",
day = "18",
doi = "10.1126/science.1189354",
language = "English",
volume = "328",
pages = "1547--1550",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "5985",

}

TY - JOUR

T1 - Crossover from single-step tunneling to multistep hopping for molecular triplet energy transfer

AU - Vura-Weis, Josh

AU - Abdelwahed, Sameh H.

AU - Shukla, Ruchi

AU - Rathore, Rajendra

AU - Ratner, Mark A

AU - Wasielewski, Michael R

PY - 2010/6/18

Y1 - 2010/6/18

N2 - Triplet energy transfer (TT), a key process in molecular and organic electronics, generally occurs by either strongly distance-dependent single-step tunneling or weakly distance-dependent multistep hopping. We have synthesized a series of p-stacked molecules consisting of a benzophenone donor, one to three fluorene bridges, and a naphthalene acceptor, and studied the rate of TT from benzophenone to naphthalene across the fluorene bridge using femtosecond transient absorption spectroscopy. We show that the dominant TT mechanism switches from tunneling to wire-like hopping between bridge lengths 1 and 2. The crossover observed for TT can be determined by direct observation of the bridge-occupied state. Copyright Science 2010 by the American Association for the Advancement of Science; all rights reserved.

AB - Triplet energy transfer (TT), a key process in molecular and organic electronics, generally occurs by either strongly distance-dependent single-step tunneling or weakly distance-dependent multistep hopping. We have synthesized a series of p-stacked molecules consisting of a benzophenone donor, one to three fluorene bridges, and a naphthalene acceptor, and studied the rate of TT from benzophenone to naphthalene across the fluorene bridge using femtosecond transient absorption spectroscopy. We show that the dominant TT mechanism switches from tunneling to wire-like hopping between bridge lengths 1 and 2. The crossover observed for TT can be determined by direct observation of the bridge-occupied state. Copyright Science 2010 by the American Association for the Advancement of Science; all rights reserved.

UR - http://www.scopus.com/inward/record.url?scp=77953764048&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77953764048&partnerID=8YFLogxK

U2 - 10.1126/science.1189354

DO - 10.1126/science.1189354

M3 - Article

C2 - 20558715

AN - SCOPUS:77953764048

VL - 328

SP - 1547

EP - 1550

JO - Science

JF - Science

SN - 0036-8075

IS - 5985

ER -