Room-temperature phosphorescence as an indicator of triplet-triplet energy transfer between dyes and polycyclic aromatic hydrocarbons solubilized in anionic micelles

2000 ◽  
Author(s):  
G. V. Melnikov ◽  
S. Shtykov ◽  
I. Goryacheva
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Energy Transfer ◽  
Aromatic Hydrocarbons ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Triplet Energy ◽  
Polycyclic Aromatic ◽  
Triplet Energy Transfer ◽  
Anionic Micelles

scholarly journals Using Room Temperature Phosphorescence of Gold(I) Complexes for PAHs Sensing

Molecules ◽  
2021 ◽  
Vol 26 (9) ◽  
pp. 2444
Author(s):  
Marian Rosental ◽  
Richard N. Coldman ◽  
Artur J. Moro ◽  
Inmaculada Angurell ◽  
Rosa M. Gomila ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Triplet State ◽  
Aromatic Hydrocarbons ◽  
Room Temperature ◽  
Dft Calculation ◽  
Heavy Atom ◽  
Luminescent Properties ◽  
Intersystem Crossing ◽  
Room Temperature Phosphorescence ◽  
Polycyclic Aromatic

The synthesis of two new phosphane-gold(I)–napthalimide complexes has been performed and characterized. The compounds present luminescent properties with denoted room temperature phosphorescence (RTP) induced by the proximity of the gold(I) heavy atom that favors intersystem crossing and triplet state population. The emissive properties of the compounds together with the planarity of their chromophore were used to investigate their potential as hosts in the molecular recognition of different polycyclic aromatic hydrocarbons (PAHs). Naphthalene, anthracene, phenanthrene, and pyrene were chosen to evaluate how the size and electronic properties can affect the host:guest interactions. Stronger affinity has been detected through emission titrations for the PAHs with extended aromaticity (anthracene and pyrene) and the results have been supported by DFT calculation studies.

On the Use of Perhydrocoronene as a Matrix in the Luminescence Spectroscopy of Polycyclic Aromatic Hydrocarbons

1990 ◽  
Vol 45 (6) ◽  
pp. 814-816 ◽  
Author(s):  
John C. Fetzer ◽  
Maximilian Zander
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Guest Molecule ◽  
Solute Concentration ◽  
Delayed Fluorescence ◽  
Luminescence Spectroscopy ◽  
Triplet Energy ◽  
Polycyclic Aromatic ◽  
P Type ◽  
Triplet Energy Transfer

Abstract Higher molecular polycyclic aromatic hydrocarbons (PAH) form supersaturated solid solutions in perhydrocoronene. With coronene as the solute, concentration-dependent P-type delayed fluorescence is observed at 77 K. Even very small amounts of coronene, present as an impurity in the perhydrocoronene matrix, can lead to quenching of the phosphorescence of an added guest PAH by intermolecular triplet-triplet energy transfer and to sensitized coronene phosphorescence when the lowest triplet state of the added guest molecule lies higher in energy than that of coronene. Thermal band broadening of guest molecule phosphorescence has been studied in the temperature range from 77 to 433 K.

9,10-Dinaphthylphenanthrene: Synthese, Rotationsisomerie und Photocyclisierung zu polycyclischen aromatischen Kohlenwasserstoffen9,10-Dinaphthylphenanthrenes: Synthesis, Rotational Isomers and Photocyclization to Polycyclic Aromatic Hydrocarbons

1992 ◽  
Vol 47 (12) ◽  
pp. 1764-1774 ◽  
Author(s):  
Karl-Dietrich Gundermann ◽  
Elke Romahn ◽  
Maximilian Zander
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Energy Transfer ◽  
Nmr Spectroscopy ◽  
Aromatic Hydrocarbons ◽  
Trans Isomers ◽  
Preparative Scale ◽  
Rotational Isomers ◽  
Polycyclic Aromatic

9,10-Di(1-naphthyl)phenanthrene (5 a) and 9,10-di(2-naphthyl)phenanthrene (5 b) have been synthesized. It is shown that 5 a and 5b both form two stable rotational (cis/trans) isomers with the naphthalene molecular planes perpendicular to the phenanthrene plane. In the case of 5 a the mixture of the two isomers has been separated in a preparative scale and each isomer characterized by e. g., NMR spectroscopy. Photocyclization of 5a leads to benzo[e]phenanthro[1,2,3,4-ghi]perylene (9) while 5 b yields phenanthro[9,10-i]pentahelicene (14); both hydrocarbons have not been previously described in the literature. The observed selectivities of photocyclization are explained on the basis of the structures and stabilities of the initially formed photoproducts (dihydro structures 15 and 14 a). The role of intramolecular non-radiative singlet-singlet energy transfer (naphthalene → phenanthrene) as competing with photocyclization is discussed in detail.

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