Publication detail

Triplet Energy Transfer in Bichromophoric Amino Acids, Dipeptides and Carboxylic Acid Diesters

ZABADAL, Miroslav HEGER, Dominik KLÁN, Petr KŘÍŽ, Zdeněk

Original Title

Triplet Energy Transfer in Bichromophoric Amino Acids, Dipeptides and Carboxylic Acid Diesters

Type

journal article - other

Language

English

Original Abstract

The Intramolecular Triplet-triplet Energy Transfer (ITET) in various bichromophoric amino acids (glycine, valine, phenylalanine, and sarcosine), dipeptides (diglycine, diphenylalanine), and a simple diester, with the benzoyl and naphthyl terminal groups serving as donor and acceptor, respectively (Fig. 1), were studied by the steady-state photokinetic measurements. The efficiency of a through-space exothermic ITET was affected by the interchromophore distance (8 or 11 atoms), the nature of the connecting chain as well as the side chains. Rigidity of the peptide bond in short bichromophoric compounds causes that the ITET processes are controlled by ground-state conformational distribution. Whereas a less rigid diester would allow that certain unfavorable conformations may coil to favorable ones within an excited-state lifetime (< 10-8 s). Flexibility of the bichromophore with ester moiety and the steric effect of the side hydrocarbon groups in valine- and sarcosine-based molecules lead into the most efficient energy transfer. While the benzyl groups in the phenylalanine and phenylalanylphenylalanine-based bichromophores had a suppressing effect on ITET.

Keywords

bichromophore; triplet-triplet energy transfer; imtramolecular energy transfer; amino acid; steady-state methods

Authors

ZABADAL, Miroslav; HEGER, Dominik; KLÁN, Petr; KŘÍŽ, Zdeněk

RIV year

2005

Released

20. 9. 2005

Publisher

Česká chemická společnost

Location

Chemické listy Novotného lávka 5 116 68 Praha 1

ISBN

0009-2770

Periodical

Chemické listy

Year of study

99

Number

S

State

Czech Republic

Pages from

513

Pages to

514

Pages count

2

BibTex

@article{BUT46647,
  author="Miroslav {Zabadal} and Dominik {Heger} and Petr {Klán} and Zdeněk {Kříž}",
  title="Triplet Energy Transfer in Bichromophoric Amino Acids, Dipeptides and Carboxylic Acid Diesters",
  journal="Chemické listy",
  year="2005",
  volume="99",
  number="S",
  pages="513--514",
  issn="0009-2770"
}