Luminescence and Configurations of Perylene Dimers in a Langmuir-Blodgett Film was written by Mahrt, J.;Willig, F.;Storck, W.;Weiss, D.;Kietzmann, R.;Schwarzburg, K.;Tufts, B.;Troesken, B.. And the article was included in Journal of Physical Chemistry in 1994.Quality Control of 12-Methoxy-12-oxododecanoic acid This article mentions the following:
Luminescence and excitation spectra of a Langmuir-Blodgett multilayer with a high concentration of densely packed perylene chromophores are measured at 2 K. They are compared with corresponding spectra of the dimeric α-perylene crystal and of perylene dimers formed in a glass. The majority of the perylene chromophores are arrested in the Langmuir-Blodgett film in the form of open metastable dimer configurations with monomer-like spectra. They dominate the absorption spectrum and excitation spectrum of luminescence. From these open dimers the excitation energy is rapidly transferred to the lower excited state of a stable dimer species functioning as a trap. Luminescence from this excited g-state leads to the peak at 550 nm in the luminescence spectrum. A second peak at 630 nm and the red side of the luminescence spectrum are due to E-excimer luminescence. The wide spectral range of the luminescence, extending from below 500 nm up to 800 nm, reflects sub-angstrom differences in the configurations of the dimers. In the experiment, the researchers used many compounds, for example, 12-Methoxy-12-oxododecanoic acid (cas: 3903-40-0Quality Control of 12-Methoxy-12-oxododecanoic acid).
12-Methoxy-12-oxododecanoic acid (cas: 3903-40-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Quality Control of 12-Methoxy-12-oxododecanoic acid
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics