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Lookup NU author(s): Professor Andrew Benniston,
Emeritus Professor Anthony Harriman,
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The properties of a tritopic artificial biological probe are described. This probe consists of a luminescent pyrene-thiophene unit connected by an ethynylene group to a 2,2′:6′,2″-terpyridine (terpy) cation binding site. The pyrene unit, as evidenced by fluorescence spectroscopy under illumination at 400 nm, is capable of intercalating into double-stranded calf-thymus DNA in H2O (buffered, pH = 7.0) at 25 °C. The binding constant K was calculated to be 6.0 × 105M-1. Titration of zinc(II) ions in an aqueous (pH = 7.0) solution containing the intercalated probe results in fluorescence quenching which again is a consequence of the zinc(II) ions binding to the terpy site. The DNA-bound probe has also been shown to undergo singlet energy transfer to intercalated ethidium bromide with a rate constant of 9.4 × 109 s-1. © Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005.
Author(s): Benniston AC, Harriman A, Lawrie DJ, Mehrabi M
Publication type: Article
Publication status: Published
Journal: European Journal of Organic Chemistry
Print publication date: 01/04/2005
ISSN (print): 1434-193X
ISSN (electronic): 1099-0690
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