Probe charge transfer

Fig. 2 Illustration of two possible routes of probe-charge transfer in a correctly connected circuit.

M.C., and Kavan, L. (2011) Probing charge transfer between shells of double-walled carbon nanotubes sorted by outer-wall electronic type. Chem. 

To directly probe charge-transfer reactions between two DNA bases, two fluorescent analogues of adenine, 2-aminopurine (A2) and l,N -ethenoadenine (A ), were employed as photooxidants (Figure ID) [16]. In aqueous solution, both of these bases are efficiently quenched by deazaguanine (Z) and guaifine (G), with only small amounts of quenching observed with inosine (I). 

Lewis WK, Lindsay CM, Bemish RJ, Miller RE. (2005) Probing charge-transfer processes in helium nanodroplets by optically selected mass spectrometry (OSMS) Charge steering by long-range interactions. J. Am. Chem. Soc. 127 7235-7242. 

Much of chemistry occurs in the condensed phase solution phase ET reactions have been a major focus for theory and experiment for the last 50 years. Experiments, and quantitative theories, have probed how reaction-free energy, solvent polarity, donor-acceptor distance, bridging stmctures, solvent relaxation, and vibronic coupling influence ET kinetics. Important connections have also been drawn between optical charge transfer transitions and thennal ET. 

Probing DNA Charge Transfer and Transport over Different Distance,... 

In many investigations of CT, pendant redox probes interact with both bases of abase pair. However, studies of base-base charge transfer can differentiate between discrete intra- and interstrand reactions (Fig. 7). These investigations further attest to the critical role of base stacking in DNA-mediated CT. In B-DNA duplexes, stacking interactions are largely restricted to... 

Wanninger-Weifi C, Valis L, Wagenknecht H-A (2008) Pyrene-modified guanosine as fluorescent probe for DNA modulated by charge transfer. Bioorg Med Chem 16 100-106... 

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