"573000" . . . "Meso-tetratolyl porfyrinov\u00E9 deriv\u00E1ty substituovan\u00E9 pyridiov\u00FDmi skupinami: agregace, fotofyzik\u00E1ln\u00ED vlastnosti a komplexace s DNA"@cs . . "RIV/61388955:_____/04:00101107!RIV/2005/AV0/A54005/N" . . "Aggregation of meso-tetratolylporphyrins substituted with two (P2), three (P3) and four (P4) pyridinium groups and their complexation with DNA were studied using UV/Vis and fluorescence spectroscopies, resonance light scattering and circular dichroism. In aqueous solution porphyrins P2-P4 existed in a monomeric form and/or as H- and J-aggregates. The concentration ratio of monomer/aggregates was controlled by the number of cationic substituents, by ionic strength and by temperature. Porphyrin monomers were externally bound to calf thymus DNA with the binding constant of /~106 M-1. Porphyrin aggregates formed chiral assemblies on the DNA template not affecting the duplex melting point. The lifetime of the triplet states of bound monomeric P3 and P4 increased after binding, however it did not prevent the formation of 1O2."@en . "Kub\u00E1t, Pavel" . "Meso-Tetratolylporphyrins Substituted by Pyridinium Groups: Aggregation, Photophysical Properties and Complexation with DNA"@en . . . "porphyrin; aggregates; DNA"@en . . . "3"^^ . . "RIV/61388955:_____/04:00101107" . "P(GA203/01/0634), P(GA203/02/0420), P(GA203/04/0426), Z(AV0Z4040901)" . . "[875635329C05]" . . . "8"^^ . "4"^^ . . "-" . . . "0894-3230" . "Meso-Tetratolylporphyrins Substituted by Pyridinium Groups: Aggregation, Photophysical Properties and Complexation with DNA"@en . "Aggregation of meso-tetratolylporphyrins substituted with two (P2), three (P3) and four (P4) pyridinium groups and their complexation with DNA were studied using UV/Vis and fluorescence spectroscopies, resonance light scattering and circular dichroism. In aqueous solution porphyrins P2-P4 existed in a monomeric form and/or as H- and J-aggregates. The concentration ratio of monomer/aggregates was controlled by the number of cationic substituents, by ionic strength and by temperature. Porphyrin monomers were externally bound to calf thymus DNA with the binding constant of /~106 M-1. Porphyrin aggregates formed chiral assemblies on the DNA template not affecting the duplex melting point. The lifetime of the triplet states of bound monomeric P3 and P4 increased after binding, however it did not prevent the formation of 1O2." . "Meso-Tetratolylporphyrins Substituted by Pyridinium Groups: Aggregation, Photophysical Properties and Complexation with DNA" . . . . "Agregace, fotofyzik\u00E1ln\u00ED vlastnosti a komplexace s DNA meso-tetratolyl porfyrinov\u00FDch deriv\u00E1t\u016F substituovan\u00E9 dv\u011Bmi (P2), t\u0159emi (P3) a \u010Dty\u0159mi (P4) pyridiov\u00FDmi skupinami byly studov\u00E1ny metodami UV/Vis spektroskopie, rozptylem sv\u011Btla, cirkul\u00E1rn\u00EDm dichroismem a pomoc\u00ED \u010Dasov\u011B rozli\u0161en\u00E9 luminiscenc\u00ED singletn\u00EDho kysl\u00EDku. Ve vodn\u00E9m roztoku se P2 \u2013 P4 vyskytuj\u00ED jako monomery a agreg\u00E1ty obou typ\u016F (J i H). Pom\u011Br koncentrac\u00ED monomeru a jednotliv\u00FDch agreg\u00E1t\u016F je \u0159\u00EDzen po\u010Dtem kationick\u00FDch substituent\u016F, iontovou silou a teplotou. P4 je p\u0159ev\u00E1\u017En\u011B monomern\u00ED a v\u00E1\u017Ee se extern\u011B na DNA s telec\u00EDho brzl\u00EDku s vazebnou konstantou 1.2x106 M-1. Pofyriny P2 a P3 samovoln\u011B agreguj\u00ED na fosf\u00E1tov\u00E9 kost\u0159e DNA a tvo\u0159\u00ED chir\u00E1ln\u00ED agreg\u00E1ty, kter\u00E9 neovliv\u0148uj\u00ED bod t\u00E1n\u00ED duplexu DNA. Doba \u017Eivota tripletn\u00EDch stav\u016F monomern\u00EDch P3 a P4 roste po nav\u00E1z\u00E1n\u00ED na DNA, ale tato skute\u010Dnost nebr\u00E1n\u00ED schopnosti tvo\u0159it singletn\u00ED kysl\u00EDk."@cs . "Meso-tetratolyl porfyrinov\u00E9 deriv\u00E1ty substituovan\u00E9 pyridiov\u00FDmi skupinami: agregace, fotofyzik\u00E1ln\u00ED vlastnosti a komplexace s DNA"@cs . "Lang, Kamil" . "17" . . . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . "890;897" . "Proch\u00E1zkov\u00E1, Kristina" . . "Meso-Tetratolylporphyrins Substituted by Pyridinium Groups: Aggregation, Photophysical Properties and Complexation with DNA" . "Journal of Physical Organic Chemistry" . "Zelinger, Zden\u011Bk" .