Fluorescence quenching in Zn2+-bis-terpyridine coordination polymers: a single molecule study
(2012) In Journal of Materials Chemistry 22(31). p.16041-16050- Abstract
- A Zn2+-bis-terpyridine coordination polymer is investigated by single-molecule fluorescence spectroscopy (SMS). The bis-terpyridine ligands of the coordination polymers bear conjugated chromophores connecting the terpyridine spheres of the ligands, which resemble structural features of MEH-PPV. To the best of our knowledge this paper presents the first systematic SMS study on Zn2+-bis-terpyridine coordination polymers. Upon incorporation of free chromophores into the polymer, the fluorescence quantum yield of individual chromophores appears to be reduced. The reason for the reduced emission per chromophore in a polymer is investigated by brightness studies on single isolated polymer molecules. Furthermore, the experiments reveal that the... (More)
- A Zn2+-bis-terpyridine coordination polymer is investigated by single-molecule fluorescence spectroscopy (SMS). The bis-terpyridine ligands of the coordination polymers bear conjugated chromophores connecting the terpyridine spheres of the ligands, which resemble structural features of MEH-PPV. To the best of our knowledge this paper presents the first systematic SMS study on Zn2+-bis-terpyridine coordination polymers. Upon incorporation of free chromophores into the polymer, the fluorescence quantum yield of individual chromophores appears to be reduced. The reason for the reduced emission per chromophore in a polymer is investigated by brightness studies on single isolated polymer molecules. Furthermore, the experiments reveal that the Zn2+-bis-terpyridine coordination polymer contains a significantly larger fraction of effective chromophores, compared to one of the most common conjugated polymers, e. g., MEH-PPV. This finding is attributed to the particularly rigid geometry of the system at hand, which was corroborated by polarization-dependent experiments. Time-resolved experiments identified two different types of intensity fluctuations: small amplitude intensity fluctuations might correlate with switching of individual chromophores by structural fluctuations, while large amplitude jumps switch off the emission of the entire molecule. Finally, experiments under different atmospheric conditions offer further insights into the molecular mechanism and the nature of the quenchers involved in the blinking. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2991515
- author
- Siebert, Ronald ; Tian, Yuxi LU ; Camacho Dejay, Rafael LU ; Winter, Andreas ; Wild, Andreas ; Krieg, Andreas ; Schubert, Ulrich S. ; Popp, Juergen ; Scheblykin, Ivan LU and Dietzek, Benjamin
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Materials Chemistry
- volume
- 22
- issue
- 31
- pages
- 16041 - 16050
- publisher
- Royal Society of Chemistry
- external identifiers
-
- wos:000306479600077
- scopus:84863903200
- ISSN
- 1364-5501
- DOI
- 10.1039/c2jm31237a
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
- id
- 327c56f3-ad53-4e89-968d-efe556dd4c4b (old id 2991515)
- date added to LUP
- 2016-04-01 10:07:50
- date last changed
- 2022-04-19 22:56:18
@article{327c56f3-ad53-4e89-968d-efe556dd4c4b, abstract = {{A Zn2+-bis-terpyridine coordination polymer is investigated by single-molecule fluorescence spectroscopy (SMS). The bis-terpyridine ligands of the coordination polymers bear conjugated chromophores connecting the terpyridine spheres of the ligands, which resemble structural features of MEH-PPV. To the best of our knowledge this paper presents the first systematic SMS study on Zn2+-bis-terpyridine coordination polymers. Upon incorporation of free chromophores into the polymer, the fluorescence quantum yield of individual chromophores appears to be reduced. The reason for the reduced emission per chromophore in a polymer is investigated by brightness studies on single isolated polymer molecules. Furthermore, the experiments reveal that the Zn2+-bis-terpyridine coordination polymer contains a significantly larger fraction of effective chromophores, compared to one of the most common conjugated polymers, e. g., MEH-PPV. This finding is attributed to the particularly rigid geometry of the system at hand, which was corroborated by polarization-dependent experiments. Time-resolved experiments identified two different types of intensity fluctuations: small amplitude intensity fluctuations might correlate with switching of individual chromophores by structural fluctuations, while large amplitude jumps switch off the emission of the entire molecule. Finally, experiments under different atmospheric conditions offer further insights into the molecular mechanism and the nature of the quenchers involved in the blinking.}}, author = {{Siebert, Ronald and Tian, Yuxi and Camacho Dejay, Rafael and Winter, Andreas and Wild, Andreas and Krieg, Andreas and Schubert, Ulrich S. and Popp, Juergen and Scheblykin, Ivan and Dietzek, Benjamin}}, issn = {{1364-5501}}, language = {{eng}}, number = {{31}}, pages = {{16041--16050}}, publisher = {{Royal Society of Chemistry}}, series = {{Journal of Materials Chemistry}}, title = {{Fluorescence quenching in Zn2+-bis-terpyridine coordination polymers: a single molecule study}}, url = {{http://dx.doi.org/10.1039/c2jm31237a}}, doi = {{10.1039/c2jm31237a}}, volume = {{22}}, year = {{2012}}, }