Substructures and different energy relaxation time within the first electronic transition of pinacyanol

Pigment–protein architecture in the light‐harvesting antenna complexes of purple bacteria: does the crystal structure reflect the native pigment–protein arrangement?

“…The 850‐nm band in the absorption spectrum of the isolated LH2 does not show any indication of spectral substructure, not even at 4 K [18]. However, with non‐linear polarization spectroscopy in the frequency domain (NLPF, a special optical mixing technique [22,23]) in B850 of Rb. sphaeroides such substructure can be clearly resolved already at room temperature [24]: there are two transitions with maxima at 847 and 857 nm (i.e.…”

Location of Pinacyanol in Micellar Solutions of N-Alkyl Trimethylammonium Bromide Surfactants

“…PIN has been used to determine critical micelle concentrations (4) and to study bacterial polysaccharides (5,6) and the photoisomerization of polymethine dyes, since it forms short-lived photoisomers after the S 0 → S 1 transition (7). As a redox indicator, it is used to monitor peroxide activation (8).…”

Elucidation of structure–function relationships in photosynthetic light-harvesting antenna complexes by non-linear polarization spectroscopy in the frequency domain (NLPF)

“…1997; Beenken and Ehlert, 1998). Subsequent to earlier studies with purple bacterial peripheral antenna (LH2) complexes (Leupold et al, 1993;Leupold et al, 1994;Leupold, 1995;Nowak et al, 1995;Stiel et al, 1997;Leupold et al, 2000;reviewed, e.g., Leupold et al, 2006a) and model systems (Stiel et al, 1995;Voigt et al, 1997) the experimental technique has been considerably extended and refined. In particular, a novel -much improved -set-up for NLPF spectroscopy was proposed and introduced by Voigt et al (1999).…”