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Encapsulated energy-transfer cassettes with extremely well resolved fluorescent outputs.

This paper concerns the development of water-compatible fluorescent imaging probes with tunable photonic properties that can be excited at a single wavelength. Bichromophoric cassettes 1a-1c consisting of a BODIPY donor and a cyanine acceptor were prepared using a simple synthetic route, and their p... Full description

Journal Title: Journal of the American Chemical Society January 12, 2011, Vol.133(1), pp.51-55
Main Author: Ueno, Yuichiro
Other Authors: Jose, Jiney , Loudet, Aurore , Pérez-Bolívar, César , Anzenbacher, Pavel , Burgess, Kevin
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1520-5126 ; DOI: 1520-5126 ; DOI: 10.1021/ja107193j
Link: http://search.proquest.com/docview/846898423/?pq-origsite=primo
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title: Encapsulated energy-transfer cassettes with extremely well resolved fluorescent outputs.
format: Article
creator:
  • Ueno, Yuichiro
  • Jose, Jiney
  • Loudet, Aurore
  • Pérez-Bolívar, César
  • Anzenbacher, Pavel
  • Burgess, Kevin
subjects:
  • Animals–Chemistry
  • Boron Compounds–Chemistry
  • Calcium Phosphates–Chemical Synthesis
  • Color–Chemistry
  • Drug Design–Metabolism
  • Energy Transfer–Cytology
  • Fluorescent Dyes–Chemistry
  • Liver–Chemistry
  • Molecular Imaging–Chemistry
  • Nanoparticles–Chemistry
  • Permeability–Chemistry
  • Rats–Chemistry
  • Silicates–Chemistry
  • Spectrometry, Fluorescence–Chemistry
  • Time Factors–Chemistry
  • 4,4-Difluoro-4-Bora-3a,4a-Diaza-S-Indacene
  • Boron Compounds
  • Calcium Phosphates
  • Fluorescent Dyes
  • Silicates
  • Calcium Phosphate
ispartof: Journal of the American Chemical Society, January 12, 2011, Vol.133(1), pp.51-55
description: This paper concerns the development of water-compatible fluorescent imaging probes with tunable photonic properties that can be excited at a single wavelength. Bichromophoric cassettes 1a-1c consisting of a BODIPY donor and a cyanine acceptor were prepared using a simple synthetic route, and their photophysical properties were investigated. Upon excitation of the BODIPY moiety at 488 nm the excitation energy is transferred through an acetylene bridge to the cyanine dye acceptor, which emits light at approximately 600, 700, and 800 nm, i.e., with remarkable dispersions. This effect is facilitated by efficient energy transfer that gives a "quasi-Stokes" shift between 86 and 290 nm, opening a huge spectral window for imaging. The emissive properties of the cassettes depend on the energy-transfer (ET) mechanism: the faster the transfer, the more efficient it is. Measurements of rates of ET indicate that a through-bond ET takes place in the cassettes 1a and 1b that is 2 orders of magnitude faster than the classical through-space, Förster ET. In the case of cassette 1c, however, both mechanisms are possible, and the rate measurements do not allow us to discern between them. Thus, the cassettes 1a-1c are well suited for multiplexing experiments in biotechnological methods that involve a single laser excitation source. However, for widespread application of these probes, their solubility in aqueous media must be improved. Consequently, the probes were encapsulated in calcium phosphate/silicate nanoparticles (diameter ca. 22 nm) that are freely dispersible in water. This encapsulation process resulted in only minor changes in the photophysical properties of the cassettes. The system based on cassette 1a was chosen to probe how effectively these nanoparticles could be used to deliver the dyes into cells. Encapsulated cassette 1a permeated Clone 9 rat liver cells, where it localized in the mitochondria and fluoresced through the acceptor part, i.e., red. Overall, this paper reports readily accessible, cyanine-based through-bond ET cassettes that are lypophilic but can be encapsulated to form nanoparticles that disperse freely in water. These particles can be used to enter cells and to label organelles.
language: eng
source:
identifier: E-ISSN: 1520-5126 ; DOI: 1520-5126 ; DOI: 10.1021/ja107193j
fulltext: no_fulltext
issn:
  • 15205126
  • 1520-5126
url: Link


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titleEncapsulated energy-transfer cassettes with extremely well resolved fluorescent outputs.
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subjectAnimals–Chemistry ; Boron Compounds–Chemistry ; Calcium Phosphates–Chemical Synthesis ; Color–Chemistry ; Drug Design–Metabolism ; Energy Transfer–Cytology ; Fluorescent Dyes–Chemistry ; Liver–Chemistry ; Molecular Imaging–Chemistry ; Nanoparticles–Chemistry ; Permeability–Chemistry ; Rats–Chemistry ; Silicates–Chemistry ; Spectrometry, Fluorescence–Chemistry ; Time Factors–Chemistry ; 4,4-Difluoro-4-Bora-3a,4a-Diaza-S-Indacene ; Boron Compounds ; Calcium Phosphates ; Fluorescent Dyes ; Silicates ; Calcium Phosphate
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descriptionThis paper concerns the development of water-compatible fluorescent imaging probes with tunable photonic properties that can be excited at a single wavelength. Bichromophoric cassettes 1a-1c consisting of a BODIPY donor and a cyanine acceptor were prepared using a simple synthetic route, and their photophysical properties were investigated. Upon excitation of the BODIPY moiety at 488 nm the excitation energy is transferred through an acetylene bridge to the cyanine dye acceptor, which emits light at approximately 600, 700, and 800 nm, i.e., with remarkable dispersions. This effect is facilitated by efficient energy transfer that gives a "quasi-Stokes" shift between 86 and 290 nm, opening a huge spectral window for imaging. The emissive properties of the cassettes depend on the energy-transfer (ET) mechanism: the faster the transfer, the more efficient it is. Measurements of rates of ET indicate that a through-bond ET takes place in the cassettes 1a and 1b that is 2 orders of magnitude faster than the classical through-space, Förster ET. In the case of cassette 1c, however, both mechanisms are possible, and the rate measurements do not allow us to discern between them. Thus, the cassettes 1a-1c are well suited for multiplexing experiments in biotechnological methods that involve a single laser excitation source. However, for widespread application of these probes, their solubility in aqueous media must be improved. Consequently, the probes were encapsulated in calcium phosphate/silicate nanoparticles (diameter ca. 22 nm) that are freely dispersible in water. This encapsulation process resulted in only minor changes in the photophysical properties of the cassettes. The system based on cassette 1a was chosen to probe how effectively these nanoparticles could be used to deliver the dyes into cells. Encapsulated cassette 1a permeated Clone 9 rat liver cells, where it localized in the mitochondria and fluoresced through the acceptor part, i.e., red. Overall, this paper reports readily accessible, cyanine-based through-bond ET cassettes that are lypophilic but can be encapsulated to form nanoparticles that disperse freely in water. These particles can be used to enter cells and to label organelles.
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titleEncapsulated energy-transfer cassettes with extremely well resolved fluorescent outputs.
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