Results 231 to 240 of about 28,603 (262)

Intersystem crossing in methylene

Chemical Physics Letters, 1970
Abstract Singlet-triplet intersystem crossing in methylene is considered as a two step process: (a) reversible intramolecular equilibration of singlet and triplet species, and (b) collisional deactivation of the vibrationally excited triplet state. The overall process is predicted to be bimolecular, in agreement with the experimental observation of ...
Tai Yup Chang, Harold Basch
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Intersystem crossing in anthracene

Chemical Physics Letters, 1970
Abstract A temperature dependent intersystem crossing rate is observed below ca. 170°K for anthracene in methyl tetrahydrofuran. From the temperature dependence of the 0,0 bands in absorption and emission, this is interpreted as being due to slow lattice relaxation in the excited singlet state.
T.F. Hunter, R.F. Wyatt
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Rapid intersystem crossings in anti bimanes

Physical Chemistry Chemical Physics, 2016
First principles electronic structure calculations show that T2 in anti bimanes are effective conduits for very fast intersystem crossings from S1 into the triplet manifold.
T S, Chwee, G S, Lim, Z C, Wong, M B, Sullivan, W Y, Fan   +4 more
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Intersystem crossing in methylene

Chemical Physics Letters, 1969
Abstract The rate of singlet-triplet intersystem crossing in methylene is a second-order process requiring collisional perturbation to couple with the triplet manifold so that the transition can occur. The efficiency of the process increases with increasing mass of the collision partner, but nevertheless is relatively slow, requiring in excess of 200
Thomas W. Eder, Robert W. Carr, John W. Koenst   +2 more
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Unexpected intersystem crossing

Nature Chemistry, 2019
Intersystem crossing plays a role in the mechanism of many reactive collisions between atomic species and organic molecules, and has been generally observed when the reactants are still approaching one another. Now, intersystem crossing has been observed to also occur after their initial interaction.
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Intersystem crossing of triplet formaldehyde

Chemical Physics Letters, 1974
Abstract Triplet benzene (3B1U sensitized decomposition of H2CO in the gas phase gives an appreciable yield of “molecules” H2 and CO. This evidence supports that T1↭S0 intersystem crossing in formaldehyde is an efficient and important process. The implication of this is that S1↭T1 intersystem crossing could be important, more so than recognized ...
Richard G. Miller, Edward K.C. Lee
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Nanomagnetic Control of Intersystem Crossing

The Journal of Physical Chemistry A, 2009
A theory is presented for how magnetic nanostructures can catalyze intersystem crossing in molecular radical pairs. Magnetic field gradients near physically realistic nanostructures are strong enough to induce a relative reorientation of two electronic spins in
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Intersystem crossing in the helicenes

Chemical Physics Letters, 1975
Abstract The rate constants of radiationless S1 → Tn and T1 → S0 intersystem crossing of six helicenes have been evaluated by combining emission lifetimes and quantum yields of fluorescence and triplet state formation. The data are compared to those of linear acenes.
Sapir, Michael, Vander Donckt, Emile
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Intersystem crossing in molecular dimers

Chemical Physics Letters, 1978
Abstract Intersystem crossing in molecular pairs is examined in relation to the structure of the pair. Simple relationships are derived which differ from previously reported ones by the inclusion of the vibronic nature of intersystem crossing.
Michael K. Bowman, James R. Norris
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Comments on activated intersystem crossing

Chemical Physics Letters, 1972
Abstract Parameters defining temperature-dependent and temperature-independent intersystem crossing from the fluorescent state of 1,2-benzanthracene are reported, and their significance is discussed in terms of multilevel crossing from vibrationally excited singlet states.
M.F. Thomaz, M. Isabel Barradas, B. Stevens   +2 more
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