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Distinguishing Förster resonance energy transfer and solvent-mediated charge-transfer relaxation dynamics in a zinc(II) indicator

Title: Distinguishing Förster resonance energy transfer and solvent-mediated charge-transfer relaxation dynamics in a zinc(II) indicator: a femtosecond time-resolved transient absorption spectroscopic study.
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Name(s): Zhu, Lei, 1978-, author
Sreenath, Kesavapillai, author
Yi, Chongyue, author
Knappenberger, Kenneth, Jr., author
Type of Resource: text
Genre: Text
Issuance: serial
Date Issued: 2014
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: A bifluorophoric molecule (1) capable of intramolecular Förster Resonance Energy Transfer (FRET) is reported. The emission intensity of the FRET acceptor in 1 depends on the molar absorptivity of the donor, which is a function of zinc(II) complexation. The FRET dynamics of [Zn(1)](ClO4)2 is characterized by femtosecond time-resolved transient absorption spectroscopy. The solvent-mediated relaxation of the charge-transfer (CT) state of the isolated donor and the FRET process of the donor–acceptor conjugate are on similar time scales (40–50 ps in CH3CN), but distinguishable by the opposite solvent polarity dependency. As the solvent polarity increases, the efficiency of Columbic-based FRET is reduced, whereas CT relaxation is accelerated. In addition to revealing a method to distinguish CT and FRET dynamics, this work provides a photophysical foundation for developing indicators based on the FRET strategy.
Identifier: FSU_migr_chm_faculty_publications-0015 (IID), 10.1039/C3CP55382E (DOI)
Keywords: FRET, zinc, charge transfer, BODIPY, femtosecond
Citation: "Distinguishing Forster resonance energy transfer and solvent-mediated charge-transfer relaxation dynamics in a zinc(II) indicator: a femtosecond time-resolved transient absorption spectroscopic study" Sreenath, K.; Yi, C. Y.; Knappenberger, K. L.; Zhu L. Phys. Chem. Chem. Phys. 2014, 16, 5088-5092.
Subject(s): Chemistry, Inorganic
Chemistry, Organic
Chemistry, Physical and theoretical
Links: http://dx.doi.org/10.1039/C3CP55382E
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_migr_chm_faculty_publications-0015
Owner Institution: FSU
Is Part of Series: Department of Chemistry and Biochemistry Faculty Publications.
Is Part Of: Physical Chemistry Chemical Physics.
Issue: 16

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Zhu, L., Sreenath, K., Yi, C., & Knappenberger, K. (2014). Distinguishing Förster resonance energy transfer and solvent-mediated charge-transfer relaxation dynamics in a zinc(II) indicator: a femtosecond time-resolved transient absorption spectroscopic study. Physical Chemistry Chemical Physics. Retrieved from http://dx.doi.org/10.1039/C3CP55382E