OBSERVATION OF CONFORMATIONAL RELAXATION HINDRANCE IN THE SINGLET EXCITED-STATE FOR PORPHYRIN INCORPORATED IN A LIPID-MEMBRANE

Authors
ANIKIN MV BOROVKOV VV ISHIDA A WASA K SAKATA Y
Citation
Mv. Anikin et al., OBSERVATION OF CONFORMATIONAL RELAXATION HINDRANCE IN THE SINGLET EXCITED-STATE FOR PORPHYRIN INCORPORATED IN A LIPID-MEMBRANE, Chemical physics letters, 226(3-4), 1994, pp. 337-343
Citations number
32
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
226
Issue
3-4
Year of publication
1994
Pages
337 - 343
Database
ISI
SICI code
0009-2614(1994)226:3-4<337:OOCRHI>2.0.ZU;2-I
Abstract
The behavior of two free base porphyrins, 5,10,15,20-tetrakis(p-tolyl) porphine (TTP) and 10,15,20-tetrakis(3,5-di-tert-butylphenyl)porphine (TBP), incorporated into dipalmitoyl-phosphatidylcholine membranes has been comparatively studied by steady-state fluorescence spectroscopy. TBP in the membrane interior, in contrast to TTP, showed pronounced d ecrease of Stokes shift and displacement of Q bands toward shorter wav elengths due to the restriction of its conformational freedom caused b y the interaction of tert-butyl residues with ordered lipid hydrocarbo n chains.