Non-exponential distance dependence of bridge-mediated electronic coupling

• Donor chromophores attached to oligo-(phenyleneethynylene) molecular bridges of varying length have attenuation factors for electron tunneling β that vary systematically with the donor-bridge (DB) energy gap (see picture). Investigations show that for bridges with ethynylene and vinylene repeating subunits, the electronic coupling increases with increasing donor-acceptor (DA) distance. A simple model accounts for this unexpected observation. (Figure Presented). © 2006 Wiley-VCH Verlag GmbH & Co. KGaA.

Subject headings

NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

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art (subject category)

ref (subject category)