scholarly journals Role of aquifer media in determining the fate of polycyclic aromatic hydrocarbons in the natural water and sediments along the lower Ganges river basin

2019 ◽  
Vol 55 (4) ◽  
pp. 354-373 ◽  
Author(s):  
Srimanti Duttagupta ◽  
Abhijit Mukherjee ◽  
Joyanto Routh ◽  
Laxmi Gayatri Devi ◽  
Animesh Bhattacharya ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
River Basin ◽  
Aromatic Hydrocarbons ◽  
Natural Water ◽  
Ganges River ◽  
Polycyclic Aromatic ◽  
Ganges River Basin

Role of alterations in ca2+‐associated signaling pathways in the immunotoxicity of polycyclic aromatic hydrocarbons

1995 ◽  
Vol 45 (2) ◽  
pp. 101-126 ◽  
Author(s):  
Donna R. Davila ◽  
DeAnn P. Davis ◽  
Kerry Campbell ◽  
John C. Cambier ◽  
Letitia A. Zigmond ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Signaling Pathways ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

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.

Sign in / Sign up

Export Citation Format

Share Document