Hydrogen-bond mediated photoinduced electron-transfer: novel dimethylaniline-anthracene ensembles formed via Watson-Crick base-pairing.
The synthesis of a new, noncovalent anthracene-dimethylaniline dyad (ensemble I) held together via guanosine-cytidine Watson-Crick base-pairing interactions is reported. Upon excitation at 420 nm, photoinduced electron-transfer from the dimethylaniline donor to the singlet excited state of the anthracene acceptor occurs, as inferred from a combination of time-resolved fluorescence quenching and transient absorption measurements. In toluene at room temperature, the rate constants for photoinduced intraensemble electron-transfer and subsequent back-electron-transfer (charge recombination) are k{sub CS} = (3.5 {+-} 0.03) x 10{sup 10} s{sup -1} and k{sub CR} = (1.42 {+-} 0.03) x 10{sup 9} s{sup -1}, respectively.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Institutes of Health (NIH); OUS
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 943065
- Report Number(s):
- ANL/CHM/JA-37241; JACSAT; TRN: US201002%%536
- Journal Information:
- J. Am. Chem. Soc., Vol. 123, Issue 16 ; Apr. 25, 2001; ISSN 0002-7863
- Country of Publication:
- United States
- Language:
- ENGLISH
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