𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Polarization of the monomer and excimer fluorescence of pyrene derivatives in liquid-crystalline hosts

✍ Scribed by Horst Stegemeyer; Jörg Hasse; Wim Laarhoven

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
443 KB
Volume
137
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

The monomer and excimer fluorescence polarization of 4,9-disubstituted pyrenes with molecular long axes nearly perpendicular to the pyrene skeleton were measured in a nematic liquid crystal. By comparison with unsubstituted pyrene it is found that the excimer transition moment is oriented parallel to the sandwich plane and perpendicular to the pyrene long axis.

📜 SIMILAR VOLUMES

Excimer formation of pyrene as a probe t
Excimer formation of pyrene as a probe to investigate the recombination of geminate pairs: ODESR and fluorescence study of dilute pyrene in squalane
✍ Masaharu Okazaki; Yutaka Tai; Ryoichi Nakagaki; Keichi Nunome; Kazumi Toriyama 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 504 KB

It is shown that the monomer fluorescence and the excimer fluorescence from a dilute pyrene solution in squalane at room temperature are mainly from "delayed" geminate pairs (Py-, S+) and (Py-, Py+ ), respectively, from the ODESR spectra observed at the monomer and the excimer fluorescence. The reco

Influence of Polarity and Viscosity of t
Influence of Polarity and Viscosity of the Micellar Interface on the Fluorescence Quenching of Pyrenic Compounds by Indole Derivatives in AOT Reverse Micelles Solutions
✍ Marcela S Altamirano; Claudio D Borsarelli; Juan J Cosa; Carlos M Previtali 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 132 KB

The fluorescence quenching of the pyrene derivatives (4-(1pyrenyl)butyl) trimethylammonium bromide (PBTMA), (1-(1pyrenyl)methyl) trimethylammonium iodide (PMTMA), and 1-pyrene sulfonic acid (PSA) by indole methyl substituted in positions 1 and 2, tryptophan and tryptamine, was studied in AOT/ heptan

Effects of the solid/liquid interface on
Effects of the solid/liquid interface on the excimer formation of pyrene in toluene containing poly (methyl methacrylate). A time-resolved total internal reflection fluorescence study
✍ Sanyo Hamai; Naoto Tamai; Hiroshi Masuhara 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 463 KB

By means of time-resolved total internal reflection (TIR) fluorescence measurements, rise and decay profiles of the pyrene excimer fluorescence were examined in toluene containing 3.3x 10e4 mol dm-" of poly(methy1 methacrylate) (PMMA, MW= 120000). In addition to a reduction of the fluorescence inten