scholarly journals Spectrochemical investigations of preferential solvation: fluorescence emission behavior of select polycyclic aromatic hydrocarbon solute probes dissolved in mixed solvents

1993 ◽  
Vol 97 (43) ◽  
pp. 11199-11203 ◽  
Author(s):  
William E. Acree ◽  
Sheryl A. Tucker ◽  
Denise C. Wilkins
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Preferential Solvation ◽  
Mixed Solvents ◽  
Fluorescence Emission ◽  
Polycyclic Aromatic ◽  
Emission Behavior

scholarly journals Polycyclic Aromatic Hydrocarbon Solute Probes: Effect of Solvent Polarity on the Ovalene and Benzo[ghi]perylene Fluorescence Emission Fine Structures

1988 ◽  
Vol 42 (8) ◽  
pp. 1525-1531 ◽  
Author(s):  
Riaz Waris ◽  
Michael A. Rembert ◽  
David M. Sellers ◽  
William E. Acree ◽  
Kenneth W. Street ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Fluorescence Emission ◽  
Solvent Polarity ◽  
Fluorescence Properties ◽  
Effect Of Solvent ◽  
Fluorescence Measurements ◽  
Polycyclic Aromatic ◽  
Fine Structures ◽  
Made In

Fluorescence properties of benzo[ghi]perylene (BPe) and ovalene (Ov) dissolved in 25 solvents of varying polarity are reported. Measurements indicate that emission intensities depend on solvent polarity. The BPe and Ov solvent polarity scales are defined as the ratio of the fluorescence emission intensities of bands I and III of the vibronic spectra. Benzo[ghi]perylene and ovalene solute probes enable fluorescence measurements to be made in spectral regions less prone to solvent inner filtering and other artifacts which have hampered the use of pyrene (Py) as a polarity probe molecule.

Polycyclic Aromatic Hydrocarbon Solute Probes. Part IV: Effect of Solvent Polarity on the Fluorescence Emission Fine Structures of Select Pyrene and Pentaphene Derivatives

1989 ◽  
Vol 43 (5) ◽  
pp. 845-850 ◽  
Author(s):  
Riaz Waris ◽  
Kenneth W. Street ◽  
William E. Acree ◽  
John C. Fetzer
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Fluorescence Spectra ◽  
Fluorescence Emission ◽  
Solvent Polarity ◽  
Effect Of Solvent ◽  
Polycyclic Aromatic ◽  
Fine Structures ◽  
Intensity Ratios ◽  
Calculated Intensity

Fluorescence properties of benzo[e]pyrene, benzo[a)pyrene, dibenzo[a,ejpyrene (naphtho[1,2,3,4def]chrysene), 1-chloropyrene, tribenzo[de, kl,rst]pentaphene, dinaphtho[2,1,8,7defg,2′,1,8′,7'ijkl]pentaphene, benz [rst]anthra[9,1,2cde]pentaphene, and dibenzo[fg,ij]phenanthro[2,1,10,9,8,7pqrstuv]pentaphene dissolved in solvents of varying polarity are reported. Measurements indicate that emission intensities of benzo[e)pyrene (BePy) and dibenzophenanthropentaphene (DBPP) depend on solvent polarity. Two new polarity scales are defined, BePy = I/IV and DBPP = I/II, on the basis of the ratio of the fluorescence intensities of select vibronic bands. For fluorescence spectra for the remaining six compounds studied, either the spectra were not clearly resolvable or the calculated intensity ratios remained nearly constant, irrespective of solvent polarity.

Polycyclic Aromatic Hydrocarbon Solute Probes. Part V: Fluorescence Spectra of Pyrene, Ovalene, Coronene, and Benzo[ghi]perylene Dissolved in Liquid Alkylammonium Thiocyanate Organic Salts

1989 ◽  
Vol 43 (7) ◽  
pp. 1149-1153 ◽  
Author(s):  
Kenneth W. Street ◽  
William E. Acree ◽  
John C. Fetzer ◽  
Prabhakara H. Shetty ◽  
Colin F. Poole
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Emission Intensity ◽  
Fluorescence Spectra ◽  
Fluorescence Emission ◽  
Fluorescence Properties ◽  
Organic Salts ◽  
Polycyclic Aromatic ◽  
Fluorescence Emission Intensity ◽  
Intensity Ratios

Fluorescence properties of pyrene (Py), benzo[ghi]perylene (BPe), coronene (Co), and ovalene (Ov) dissolved in n-butylammonium thiocyanate, sec-butylammonium thiocyanate, and dipropylammonium thiocyanate are reported. Solvent polarities of the thiocyanate salts are estimated from the fluorescence emission intensity ratios of bands I and III (i.e., Py = I/III) of the polycyclic aromatic hydrocarbon vibronic spectra. Calculated BPe, Co, and Ov values indicate that all three thiocyanate salts are comparable in polarity to cyclohexanone.

scholarly journals Polycyclic aromatic hydrocarbon solute probes. Part II. Effect of solvent polarity on the fluorescence emission fine structures of coronene derivatives

The Analyst ◽  
1989 ◽  
Vol 114 (2) ◽  
pp. 195 ◽  
Author(s):  
Riaz Waris ◽  
Michael A. Rembert ◽  
David M. Sellers ◽  
William E. Acree ◽  
Kenneth W. Street ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Fluorescence Emission ◽  
Solvent Polarity ◽  
Effect Of Solvent ◽  
Polycyclic Aromatic ◽  
Fine Structures

1,1’-Biaceanthrylene and 2,2'-Biaceanthrylene: Models for Linking Larger Polycyclic Aromatic Hydrocarbons via Five-Membered Rings

2019 ◽  
Author(s):  
Yachu Du ◽  
Kyle Plunkett
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Electronic Properties ◽  
Aromatic Hydrocarbons ◽  
Model Systems ◽  
Redox Potentials ◽  
Dimer Model ◽  
Optical And Electronic Properties ◽  
Polycyclic Aromatic

We show that polycyclic aromatic hydrocarbon (PAH) chromophores that are linked between two five-membered rings can access planarized structures with reduced optical gaps and redox potentials. Two aceanthrylene chromophores were connected into dimer model systems with the chromophores either projected outward (2,2’-biaceanthrylene) or inward (1,1’-biaceanthrylene) and the optical and electronic properties were compared. Only the planar 2,2’-biaceanthrylene system showed significant reductions of the optical gaps (1 eV) and redox potentials in relation to the aceanthrylene monomer.<br>

1,1’-Biaceanthrylene and 2,2'-Biaceanthrylene: Models for Linking Larger Polycyclic Aromatic Hydrocarbons via Five-Membered Rings

2019 ◽  
Author(s):  
Yachu Du ◽  
Kyle Plunkett
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Electronic Properties ◽  
Aromatic Hydrocarbons ◽  
Model Systems ◽  
Redox Potentials ◽  
Dimer Model ◽  
Optical And Electronic Properties ◽  
Polycyclic Aromatic

We show that polycyclic aromatic hydrocarbon (PAH) chromophores that are linked between two five-membered rings can access planarized structures with reduced optical gaps and redox potentials. Two aceanthrylene chromophores were connected into dimer model systems with the chromophores either projected outward (2,2’-biaceanthrylene) or inward (1,1’-biaceanthrylene) and the optical and electronic properties were compared. Only the planar 2,2’-biaceanthrylene system showed significant reductions of the optical gaps (1 eV) and redox potentials in relation to the aceanthrylene monomer.<br>

Sign in / Sign up

Export Citation Format

Share Document