6. Photophysical Properties and Applications of Lanthanoid Helicates

  1. Galia Maayan3 and
  2. Markus Albrecht4
  1. Jean-Claude G. Bünzli1,2

Published Online: 4 FEB 2013

DOI: 10.1002/9781118517413.ch6

Metallofoldamers: Supramolecular Architectures from Helicates to Biomimetics

Metallofoldamers: Supramolecular Architectures from Helicates to Biomimetics

How to Cite

Bünzli, J.-C. G. (2013) Photophysical Properties and Applications of Lanthanoid Helicates, in Metallofoldamers: Supramolecular Architectures from Helicates to Biomimetics (eds G. Maayan and M. Albrecht), John Wiley & Sons, Ltd, Chichester, UK. doi: 10.1002/9781118517413.ch6

Editor Information

  1. 3

    Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Israel

  2. 4

    Institut für Organische Chemie, RWTH Aachen University, Germany

Author Information

  1. 1

    Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Switzerland

  2. 2

    Photovoltaic Materials, Department of Materials Chemistry, Korea University, Sejong Campus, South Korea

Publication History

  1. Published Online: 4 FEB 2013
  2. Published Print: 25 FEB 2013

ISBN Information

Print ISBN: 9780470973233

Online ISBN: 9781118517413

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Keywords:

  • chiral helicates;
  • energy transfer;
  • heterometallic d-f helicates;
  • homometallic lanthanoid helicates;
  • lanthanoid luminescence;
  • nephelauxetic effect;
  • photophysical properties;
  • quantum yield;
  • radiative lifetime;
  • site-symmetry analysis

Summary

This chapter describes basic photophysical properties of homometallic lanthanoid helicates, heterometallic d-f helicates, and chiral helicates, along with photonic applications in biosciences and luminescent materials. First, it focuses on triple-stranded dinuclear helicates for which extensive photophysical data are at hand. This section presents a discussion on the influence of the triplet-state energy on quantum yields, radiative lifetime, nephelauxetic effect, site-symmetry analysis, energy transfer between lanthanoid ions, and lanthanoid luminescent bioprobes. These helicates have been tested on three aspects: luminescent cell staining, specific targeting of cancerous cells and tissues and DNA analysis. Other investigated helicates discussed are dinuclear triple-stranded helicates, tri- and tetranuclear triple-stranded helicates. The chapter also discusses luminescent properties, including sensitization of the lanthanoid luminescence by d-transition metal ions, lengthening of the excited state lifetime and molecular upconversion.