Triplet‐Singlet Transitions in Organic Molecules. Lifetime Measurements of the Triplet State

1949 ◽  
Vol 17 (10) ◽  
pp. 905-913 ◽  
Author(s):  
Donald S. McClure
Keyword(s):  
Triplet State ◽  
Organic Molecules ◽  
Lifetime Measurements

scholarly journals Quenching of hexafluoroacetone phosphorescence by mercury

1968 ◽  
Vol 46 (6) ◽  
pp. 1031-1033 ◽  
Author(s):  
N. C. Lang ◽  
K. O. Kutschke
Keyword(s):  
Triplet State ◽  
Linear Function ◽  
Excellent Agreement ◽  
Mercury Concentration ◽  
Relative Yield ◽  
Lifetime Measurements ◽  
First Order

The ratio of the relative yield for fluorescence to that for phosphorescence of hexafluoroacetone excited at 3130 Å was measured; the ratio was a linear function of mercury concentration. This observation confirms that the deactivation of the triplet state proceeds by a reaction which is first order in [Hg]. A quenching constant was obtained which is in excellent agreement with that based on lifetime measurements under mercury-free and mercury-saturated conditions.

Measurements of energy gap at the level anti-crossing region of the photo-excited triplet state of organic molecules

2000 ◽  
Vol 331 (5-6) ◽  
pp. 489-496 ◽  
Author(s):  
Tran-Chin Yang ◽  
David J. Sloop ◽  
S.I. Weissman ◽  
Tien-Sung Lin
Keyword(s):  
Triplet State ◽  
Organic Molecules ◽  
Energy Gap ◽  
Excited Triplet State ◽  
Excited Triplet

scholarly journals Looking at the photodynamics of individual fluorescent molecules and proteins

2001 ◽  
Vol 73 (3) ◽  
pp. 431-434 ◽  
Author(s):  
M. F. García-Parajó ◽  
J.-A. Veerman ◽  
L. Kuipers ◽  
N. F. van Hulst
Keyword(s):  
Triplet State ◽  
Real Time ◽  
Organic Molecules ◽  
Fluorescent Proteins ◽  
Fluorescence Emission ◽  
Intersystem Crossing ◽  
Time And Space ◽  
Dark State ◽  
Fluorescent Molecules

The photodynamics of individual molecules and fluorescent proteins has been investigated in real time. In the case of organic molecules, both the triplet state lifetime and intersystem crossing yield appear to vary in time and space. In the case of autofluorescent proteins, light-driven "on-off" fluorescence emission has been observed, with a behavior that is consistent with the existence of a long-lived dark state.

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