Effect of Hexafluorobenzene on the Photophysics of Pyrene

Abstract

Absorption and fluorescence spectroscopy studies reveal the formation of a weak complex between pyrene and C(6)F(6) even in very dilute systems. The complex affects the photophysics of pyrene and reveals a combination of static and dynamic-quenching phenomena in both polar and nonpolar solvents. The results are supported by computational studies that shed light on the structure of the complex and the interactions involved and suggest that ground and excited-state interactions are of comparable magnitude; the association is believed to be driven by quadrupolar interactions. Understanding these interactions in solution is important for applications that aim at controlling the regio- or stereoselectivity of organic reactions.

Aromatische Ringe in chemischer und biologischer Erkennung: Energien und Strukturen

“…In einer Vielzahl von Modellstudien wurde die Energetik des Perfluoraren-Aren-Synthons in Lösung untersucht. [141] Gung und Mitarbeiter stellten eine auf Triptycen basierende molekulare Waage her (Abbildung 4 c), die in der gefalteten syn-Konformation eine nahe Face-to-Face-C 6 H 5 -C 6 F 5 -Wechselwirkung eingeht, die in der anti-Konformation nicht vorliegt. [142] Die syn-Konformation ist besonders dann bevorzugt, wenn die beiden stapelnden Ringe eine entgegengesetzte Polarität aufweisen.…”

BN versus CC: How Similar Are They?

“…The photophysical behavior of pyrene is amongst the best understood of all organic compounds, and it remains the subject of much study. [17] Excimer formation occurs even at very low concentrations, and the vibrational fine structure of the emission spectrum can be used to examine solvent polarity. Thus, the synthesis of the BN analogue of pyrene represents a major breakthrough, allowing comparisons to be made with one of the most important hydrocarbon chromophores.…”

Exploring aggregation‐induced emission through tuning of ligand structure for picomolar detection of pyrene

“…Inhalation of combustion products and coal tar linings and dry cleaning of garments are also responsible for pyrene poisoning . The above discussion clearly indicates the immense importance of trace level selective detection and estimation pyrene, which is difficult because of similar properties PAHs . It is to be noted that most of the PAHs, including pyrene, are prone to aggregation (monomer to excimer) in solution, the main obstacle for their selective recognition.…”