Journal ArticleDOI
Picosecond time-resolved spectroscopy and the intersystem crossing rates of anthrone and fluorenone
T. Kobayashi,S. Nagakura +1 more
Reads0
Chats0
TLDR
In this article, the mechanism of efficient intersystem crossing of anthrone has been discussed and compared with that of benzophenene, and the rise time of fluorenone has been found to be sensitive to solvent, changing from 140 ps in cyclohexane to 12 ns in acetone.About:
This article is published in Chemical Physics Letters.The article was published on 1976-11-01. It has received 90 citations till now. The article focuses on the topics: Intersystem crossing & Fluorenone.read more
Citations
More filters
Journal ArticleDOI
Green emission from poly(fluorene)s: The role of oxidation
Egbert Zojer,Alexander Pogantsch,Emmanuelle Hennebicq,David Beljonne,Jean-Luc Brédas,Patricia Scandiucci de Freitas,Ullrich Scherf,Emil List +7 more
TL;DR: In this article, the optical properties of poly(fluorene)s containing ketonic defects were analyzed using quantum-chemical techniques, focusing on the influence of excited-state localization effects.
Journal ArticleDOI
Quenching Processes in Hydrogen-Bonded Pairs: Interactions of Excited Fluorenone with Alcohols and Phenols
TL;DR: In this paper, the authors studied the kinetics of dynamic quenching of singlet and triplet fluorenone by a series of alcohols, phenols, and related compounds, in which hydrogen-bonding power, redox potential, and acidity are systematically varied.
Journal ArticleDOI
Picosecond transient spectroscopy of molecules in solution
TL;DR: In this paper, the transient absorption spectra of a number of compounds in solution at room temperature have been measured with picosecond-scale time resolution and unprecedented accuracy and reliability.
Journal ArticleDOI
1H‐Phenalen‐1‐one: Photophysical Properties and Singlet‐Oxygen Production
Esther Oliveros,Patricia Suardi-Murasecco,T. Aminian-Saghafi,André M. Braun,Hans-Jürgen Hansen +4 more
TL;DR: The 1H-phenalen-1-one (1) has been shown to be one of the most efficient singlet-oxygen sensitizers in both polar and non-polar media, in particular in the area of relatively high energies of excitation as mentioned in this paper.
Journal ArticleDOI
Ultrafast intermolecular hydrogen bond dynamics in the excited state of fluorenone
Vaishali Samant,Arun K. Singh,Guda Ramakrishna,Hirendra N. Ghosh,Tapan K. Ghanty,Dipak K. Palit +5 more
TL;DR: In this paper, a comparison of the features of the steady-state fluorescence spectra of fluorenone in various kinds of media demonstrates that two spectroscopically distinct forms of fluornone in the S 1 state, namely the non-hydrogen-bonded (or free) molecule as well as the hydrogen-bunded complex, are responsible for the dual-fluorescence behavior of fluorescence behavior of normal alcoholic solvents at room temperature (298 K).
References
More filters
Journal ArticleDOI
Spin—Orbit Coupling and the Radiationless Processes in Nitrogen Heterocyclics
TL;DR: In this paper, the matrix elements of the spin-orbit operator between the zero-order (spin-free) (n, π*) states of nitrogen heterocyclics are examined.
Journal ArticleDOI
The Radiationless Processes Involving Change of Multiplicity in the Diazenes
Journal ArticleDOI
Spin-Orbit Coupling and Radiationless Transitions in Aromatic Ketones
S. Dym,Robin M. Hochstrasser +1 more
TL;DR: The spin-orbital coupling mechanism for 3nπ*←1A was investigated for several substituted benzophenones by use of polarized absorption spectra and high-field Zeeman studies and was found to be consistent with the scheme already determined for benzophenone itself as mentioned in this paper.
Journal ArticleDOI
The Dynamics of Populating The Lowest Triplet State Of Benzophenone Following Singlet Excitation
TL;DR: In this paper, the build-up of triplet-triplet absorption at 5300 A was measured during and subsequent to the excitation of benzophenone by 5 psec pulses of 3545 A radiation (frequency tripled Nd 3+ : glass fundamental).