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  • Siebert, Ronald (author)

Fluorescence quenching in Zn2+-bis-terpyridine coordination polymers: a single molecule study

  • Article/chapterEnglish2012

Publisher, publication year, extent ...

  • Royal Society of Chemistry (RSC),2012

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  • LIBRIS-ID:oai:lup.lub.lu.se:327c56f3-ad53-4e89-968d-efe556dd4c4b
  • https://lup.lub.lu.se/record/2991515URI
  • https://doi.org/10.1039/c2jm31237aDOI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • 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.

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  • Tian, YuxiLund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)chem-yit (author)
  • Camacho Dejay, RafaelLund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)chem-rce (author)
  • Winter, Andreas (author)
  • Wild, Andreas (author)
  • Krieg, Andreas (author)
  • Schubert, Ulrich S. (author)
  • Popp, Juergen (author)
  • Scheblykin, IvanLund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)chem-isc (author)
  • Dietzek, Benjamin (author)
  • Kemisk fysikEnheten för fysikalisk och teoretisk kemi (creator_code:org_t)

Related titles

  • In:Journal of Materials Chemistry: Royal Society of Chemistry (RSC)22:31, s. 16041-160501364-55010959-9428

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