Fluorescence quenching of polycyclic aromatic compounds by humic acid

The Analyst ◽  
1994 ◽  
Vol 119 (5) ◽  
pp. 997-1001 ◽  
Author(s):  
M. U. Kumke ◽  
H.-G. Löhmannsröben ◽  
Th. Roch
Keyword(s):  
Humic Acid ◽  
Fluorescence Quenching ◽  
Aromatic Compounds ◽  
Polycyclic Aromatic Compounds ◽  
Polycyclic Aromatic

scholarly journals Spectroscopic Properties of Polycyclic Aromatic Compounds: Examination of Nitromethane as a Selective Fluorescence Quenching Agent for Alternant Polycyclic Aromatic Nitrogen Hetero-Atom Derivatives

1992 ◽  
Vol 46 (2) ◽  
pp. 229-235 ◽  
Author(s):  
Sheryl A. Tucker ◽  
William E. Acree ◽  
Mary J. Tanga ◽  
Sumio Tokita ◽  
Kimihiro Hiruta ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Aromatic Compounds ◽  
Fluorescence Emission ◽  
Spectroscopic Properties ◽  
Polycyclic Aromatic Compounds ◽  
Solvent Mixtures ◽  
Aqueous Acetonitrile ◽  
Polycyclic Aromatic ◽  
Emission Behavior

Nitromethane is examined as a selective fluorescence quenching agent for alternant polycyclic aromatic nitrogen hetero-atoms (PANHs). Fluorescence emission behavior is reported for 1-azapyrene, 2-azapyrene, 4-azapyrene, 4-azachrysene, 12-azabenzo[a]pyrene, phenanthro[9, 10g]isoquinoline, phenanthro[2,3h]isoquinoline, phenanthro[3,2h]-isoquinoline, 2-azabenz[a]anthracene, 1-azabenz[a]anthracene, 9-azabenz[a]anthracene, dibenzo[c,i]phenanthro[1,10,9,8anmlk]phenanthridine, diphenanthro[9,10,1def;1',10',9'hij]phthalazine, and benz[de]isoquino[1,8gh]quinoline dissolved in acetonitrile or aqueous-acetonitrile solvent mixtures at various nitromethane concentrations. Results of these measurements show that nitromethane does quench fluorescence emission of ten of the solutes studied; however, phenanthro-[2,3h]isoquinoline, 9-azabenz[a]anthracene, benz[de]isoquino[1,8gh]-quinoline, and dibenzo[c,i]phenanthro[1,10,9,8anmlk]phenanthridine are notable exceptions.

Sorption of Polycyclic Aromatic Compounds to Humic Acid As Studied by High-Performance Liquid Chromatography

1997 ◽  
Vol 31 (4) ◽  
pp. 1102-1108 ◽  
Author(s):  
Torben Nielsen ◽  
Katrin Siigur ◽  
Christian Helweg ◽  
Ole Jørgensen ◽  
Poul Erik Hansen ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Humic Acid ◽  
Aromatic Compounds ◽  
High Performance ◽  
Polycyclic Aromatic Compounds ◽  
Polycyclic Aromatic
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