"Heger, Dominik" . "photochemistry; energy transfer"@en . "RIV/00216224:14310/04:00009947!RIV09-MSM-14310___" . . . "Collect. Czech. Chem. Commun." . . "4" . . "Z(MSM 143100005)" . . "4"^^ . "Intramolekul\u00E1rn\u00ED tripletov\u00FD p\u0159enos energie u kr\u00E1tk\u00FDch bichromoforn\u00EDch aminokyselin"@cs . "4"^^ . "RIV/00216224:14310/04:00009947" . . "K\u0159\u00ED\u017E, Zden\u011Bk" . . "568790" . "Intramolekul\u00E1rn\u00ED tripletov\u00FD p\u0159enos energie u kr\u00E1tk\u00FDch bichromoforn\u00EDch aminokyselin"@cs . . "Efficiencies of the intramolecular triplet-triplet energy transfer (ITET) in various bichromophoric amino acids (glycine, valine, phenylalanine, and sarcosine), dipeptides (glycylglycine, phenylalanylphenylalanine), and a simple diester, with the benzoyl and naphthyl terminal groups serving as donor and acceptor, respectively, have been determined by the steady-state photokinetic measurements. The magnitude of the transfer rate constants (>10 exp8 s-1) and the number of bonds separating the chromophores (8 or 11 atoms) suggest a through-space exothermic exchange mechanism in all cases. The influence of interchromophore distance, the character of the connecting chain as well as of side chains, was evaluated. While the most efficient energy transfer was found in a flexible diester and in valine- and sarcosine-based molecules due to the steric effect of the side hydrocarbon groups, the benzyl groups in the phenylalanine and phenylalanylphenylalanine-based bichromophores had a suppressing effect on ITE" . "Intramolecular Triplet-Triplet Energy Transfer in Short Flexible Bichromophoric Amino Acids, Dipeptides and Carboxylic Acid Diester"@en . "Kl\u00E1n, Petr" . "Intramolecular Triplet-Triplet Energy Transfer in Short Flexible Bichromophoric Amino Acids, Dipeptides and Carboxylic Acid Diester" . "0010-0765" . "CZ - \u010Cesk\u00E1 republika" . . . "69" . "Efficiencies of the intramolecular triplet-triplet energy transfer (ITET) in various bichromophoric amino acids (glycine, valine, phenylalanine, and sarcosine), dipeptides (glycylglycine, phenylalanylphenylalanine), and a simple diester, with the benzoyl and naphthyl terminal groups serving as donor and acceptor, respectively, have been determined by the steady-state photokinetic measurements. The magnitude of the transfer rate constants (>10 exp8 s-1) and the number of bonds separating the chromophores (8 or 11 atoms) suggest a through-space exothermic exchange mechanism in all cases. The influence of interchromophore distance, the character of the connecting chain as well as of side chains, was evaluated. While the most efficient energy transfer was found in a flexible diester and in valine- and sarcosine-based molecules due to the steric effect of the side hydrocarbon groups, the benzyl groups in the phenylalanine and phenylalanylphenylalanine-based bichromophores had a suppressing effect on ITE"@en . . "000220854200004" . "21"^^ . . "14310" . . "Intramolekul\u00E1rn\u00ED tripletov\u00FD p\u0159enos energie u kr\u00E1tk\u00FDch bichromoforn\u00EDch aminokyselin"@cs . "Zabadal, Miroslav" . "[4932A523AEAB]" . . . "Intramolecular Triplet-Triplet Energy Transfer in Short Flexible Bichromophoric Amino Acids, Dipeptides and Carboxylic Acid Diester"@en . . "Intramolecular Triplet-Triplet Energy Transfer in Short Flexible Bichromophoric Amino Acids, Dipeptides and Carboxylic Acid Diester" . .