Photophysikalische und photochemische Prozesse in micellaren Systemen

Abstract

712 0 Verlag Chemie, GmbH. 0.6940 Weinheim, 1YKO Wertvolle Informationen iiber Zusammensetzung, Struktur und dynamische Eigenschaften dieser Micellen sind durch Photolumineszenz-Experimente erhaltlich. Wir zeigen, wie photolumineszierende und photochemische Sonden zur Erforschung der Micellstruktur und der Phasentrennung in diesen mikroheterogenen Systemen dienen konnen. Uberdies wird darauf hingewiesen, daR sich photophysikalische und photochemische Reaktionen in micellaren Systemen von analogen Prozessen in homogener Losung erheblich unterscheiden"'. 0044-K249/80/0909~0712 $ 02.50/0 Angew. Chem. 92, 712-734 (1980) Angew. Chem. 92, 712-734 (1980) Angew. Chem. 92, 712-734 (19x0) Angew. Chem. 92, 71 2-734 ( I 980)

Quenching Mechanisms and Diffusional Pathways in Micellar Systems Unravelled by Time‐Resolved Magnetic‐Field Effects

“…[2] The obvious dependence of the MFE rise on the DABCO concentration in Figure 1 À3 m). In this range, the experimental traces are very well represented by a biexponential model, as given in Equation (1).…”

“…[1,2] The latter raises a number of fundamental issues, which we will address in this paper for a ketone-amine system. Where are the reactants preferentially located?…”

Photochemistry in Surfactant Solutions

“…In this respect micelles are sometimes referred to as "supercages" and as "microscopic reactors" which favor bimolecular processes (17,18). Also the term "micellar catalysis" is used to describe the higher rate at which bimolecular photochemical reactions proceed.…”

“…Several years later the kinetics of related reactions were investigated in great detail and used for probing the structure of surfactant solutions containing substrate molecules (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16). These studies have opened the way to a proliferation of photochemical work on various other colloidal systems, which have recently been reviewed (17)(18)(19). Related subjects include the photochemical cleavage of water (20), artificial photosynthesis (21), and the photochemistry in zeolithes (22).…”

Modeling of the kinetics of pyrene-bromide phosphorescence in aqueous-micellar media

“…Oxygen causes quenching of PAH molecule luminescence [6]; therefore, this phenomenon allows diffusion [7], transport, and distribution of oxygen in various heterogeneous media to be investigated [8][9][10]. It is also used in oxygen detectors [11][12][13][14][15].…”