01 Fluorescence of Polycyclic Aromatic Hydrocarbons - anthracene_page_1
Chem4229 Fluorescence and Absorption Spectra of PAHs Experiment 1 Fluorescence and Absorption Spectra of Polycyclic Aromatic Hydrocarbons…
01 Fluorescence of Polycyclic Aromatic Hydrocarbons - anthracene_page_2
Chem4229 Excitation (Absorption) pesaee Singlet States ed Vibrational laa States 10°! Seconds s.3 | 3 3 Internal Conversion Delayed —_— 2…
01 Fluorescence of Polycyclic Aromatic Hydrocarbons - anthracene_page_3
Chem4229 R (Rydberg) o* (antibonding) x* (antibonding) o*R oro* w>n* n>o* n+ee 1m (nonbonding) © (bonding) @ (bonding) Malliken’s…
01 Fluorescence of Polycyclic Aromatic Hydrocarbons - anthracene_page_4
Chem4229 to a readout signal with a transducer. This is an example of a SB instrument in which one beam passes through one cell and is…
01 Fluorescence of Polycyclic Aromatic Hydrocarbons - anthracene_page_5
Chem4229 a radiational transition between electronic states of the same multiplicity. For most molecules, the electrons are paired in the…
01 Fluorescence of Polycyclic Aromatic Hydrocarbons - anthracene_page_6
Chem4229 Wavelength (Nanometers) 300 350 400 450500 600 8 Figure 4 J o Absorption &. 68 Fluorescence Intensity Extinction Coefficient (M“'…
01 Fluorescence of Polycyclic Aromatic Hydrocarbons - anthracene_page_7
Chem4229 A*+Q ‘Sa +Q (4) The relaxation of the excited molecule by emission of light (Eq. 3) is first order with rate constant Ar. On the…
01 Fluorescence of Polycyclic Aromatic Hydrocarbons - anthracene_page_8
Chem4229 ution, prepare a series of increasingly dilute solu- tions, in 5 mL volumetric flasks with concentrations as shown in the table…
01 Fluorescence of Polycyclic Aromatic Hydrocarbons - anthracene_page_9
Chem4229 used in this experiment. Comment on the sensitivity of the two methods. Reference (1) reports the molar absorption coeffi- cients…