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An easily accessible toolbox of functionalized macrocycles and rotaxanes, a (Tandem) ESI-FTICR mass spectrometric study on fréchet-type dendrimers with ammonium cores and hierarchical self-assembly of metallosupramolecular nano-spheres

Başlık çevirisi mevcut değil.

  1. Tez No: 401341
  2. Yazar: BİLGE BAYTEKİN
  3. Danışmanlar: PROF. DR. CHRISTOPH SCHALLEY, PROF. DR. RAINER HAAG
  4. Tez Türü: Doktora
  5. Konular: Kimya, Chemistry
  6. Anahtar Kelimeler: Belirtilmemiş.
  7. Yıl: 2008
  8. Dil: İngilizce
  9. Üniversite: Freie Universität Berlin
  10. Enstitü: Yurtdışı Enstitü
  11. Ana Bilim Dalı: Belirtilmemiş.
  12. Bilim Dalı: Belirtilmemiş.
  13. Sayfa Sayısı: 212

Özet

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Özet (Çeviri)

Bottom-to-top approach has lately gained more attention in nanotechnology for building new functional materials. However, the gap between the well-studied supramolecular architectures with promising features and the functional nano-materials is still a challenge for the chemists. Molecular machinery, which is a part of nanotechnological research, requires building blocks that are easily achievable, tuneable and working with high efficiency. Moreover, the assembly of these building blocks in specially designed ways is needed to achieve complex architectures. Macrocycles and rotaxanes have been well investigated as components of molecular machines so far by others. Even though there are uncountable examples of such systems with possible use in nanotechnology, the above mentioned gap is still present for them. In the first part of this work, not only different functional groups are incorporated in tetralactam macrocycles and rotaxanes in a straightforward way to obtain various different architectures but also ways to assemble them into higher structures are shown. The various possible uses of these architectures are stated and as an example, energy transfer systems are synthesized. In the second part, Fréchet dendrimers are investigated by a powerful analytical tool for supramolecular chemistry, electrospray ionization mass spectrometry. In this study, the defects that result from syntheses of these dendrimers are analysed. Then, an interesting and novel fragmentation pattern encountered in collision induced dissociation experiments is presented, to which several mechanisms are proposed and discussed. The last part of the thesis is another approach to functional supramolecular architectures: Self-assembled nanospheres. The study is the display of a discovery of a previously-not-known way of building up nano-spheres from coordination polymers of simple organic ligands and metal complexes.

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