Relevant bibliographies by topics / Undergoes intersystem crossing

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Academic literature on the topic 'Undergoes intersystem crossing'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Undergoes intersystem crossing"

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Fuat, Bayrakcekena, B. Jomehri Behzad, and Yaman Ali. "Photophysical properties of 5H-dibenzo[a,d]cycloheptene in solution." Journal of Indian Chemical Society Vol. 78, May 2001 (2001): 234–36. https://doi.org/10.5281/zenodo.5872863.

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Department of Electronics Engineering, Yeditepe University, Uskudar 81160, Istanbul, Turkey Department of Engineering Physics, Department of Physics, Ankara University, Tandogan 06100 Ankara, Turkey <em>E-mail</em> : ayaman@science.ankara.edu.tr&nbsp; &nbsp;<em> Fax</em> : 90-312-2232395 <em>Manuscript received 21 February 2000, revised 29 September 2000, accepted 8 December 2000</em> A number of photophysical properties of 5<em>H</em>-dibenzo[<em>a,d</em>]cycloheptene have been measured including the decay parameters of the lowest excited singlet and triplet states. Molecules were excited in
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Cruz, Chad D., Jennifer Yuan, Clàudia Climent, et al. "Using sulfur bridge oxidation to control electronic coupling and photochemistry in covalent anthracene dimers." Chemical Science 10, no. 32 (2019): 7561–73. http://dx.doi.org/10.1039/c8sc05598j.

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For anthracene dimers bridged by a sulfur atom, modulating the sulfur oxidation state profoundly affects excited state behavior. The SO<sub>2</sub>-bridge supports long-lived states and photodimerization, while the S-bridge undergoes intersystem crossing.
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3

Ghosh, Rajib, Amitabha Nandi, and Dipak K. Palit. "Solvent sensitive intramolecular charge transfer dynamics in the excited states of 4-N,N-dimethylamino-4′-nitrobiphenyl." Physical Chemistry Chemical Physics 18, no. 11 (2016): 7661–71. http://dx.doi.org/10.1039/c5cp07778h.

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Solvent sensitive excited state dynamics of DNBP is explored. In polar solvents, the ultrafast barrierless TICT process is the major relaxation pathway, whereas, in nonpolar solvents the excited state undergoes the PICT process, followed by efficient intersystem crossing to the triplet state.
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Carroll, Mary K., and Gary M. Hieftje. "A Novel Fiber-Optic-Based Pump-Probe Instrument for the Acquisition of Kinetic Information." Applied Spectroscopy 46, no. 2 (1992): 317–21. http://dx.doi.org/10.1366/0003702924125465.

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A pump-probe instrument is described that utilizes two beams from the same laser and a fiber-optic-based sample cell for low-temperature measurements. The utility of this instrument is demonstrated through an examination of the excited-state kinetics of 2,7-diphenylphenanthrene, for which the rate constant of singlet-to-triplet intersystem crossing is found to be approximately 8 × 105 s−1. This molecule is interesting in that it undergoes an unusual rotational conformation change in the triplet state with a rate constant of 2.4 × 108 s−1 at 77 K.
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Muthukrishnan, Sivaramakrishnan, Tamara C. S. Pace, Qian Li, et al. "Comparison of photoenolization and alcohol release from alkyl-substituted benzoyl benzoic esters." Canadian Journal of Chemistry 89, no. 3 (2011): 331–38. http://dx.doi.org/10.1139/v10-161.

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Photolysis of 1B in argon-saturated solutions yields 4B and releases methanol. Laser flash photolysis of 1B shows formation of biradical 2B, which has a lifetime of ~50 ns and a λmax at 330 nm. Biradical 2B undergoes an intersystem crossing to form photoenols E-3B and Z-3B with a λmax at 390 nm. Laser flash photolysis shows that the lifetimes of E-3B and Z-3B are affected by the solvent. Density functional theory calculations demonstrate that the transition-state barrier for a 1,5-H atom shift from Z-3B to regenerate 1B is affected by the ortho-alkyl substituents, whereas the stereoelectronics
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Čeklovský, Alexander, and Shinsuke Takagi. "Oxygen sensing materials based on clay/metalloporphyrin hybrid systems." Open Chemistry 11, no. 7 (2013): 1132–36. http://dx.doi.org/10.2478/s11532-013-0238-z.

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AbstractThis study was focused on the investigation of novel hybrid organo/inorganic systems for oxygen sensing applications. As a host material, a synthetic clay mineral Sumecton SA was chosen, while, as guest materials, metalloporphyrins containing Pt(II) and Pd(II) were chosen. These are known to be very efficient agents for sensing applications because of a “heavy atom effect”. This effect promotes a spin-orbit coupling, resulting in the fact that almost all of the radiation from a singlet excited state undergoes intersystem crossing, followed by a de-excitation via a triplet state. The co
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7

Lee, Richmond, and Michelle L. Coote. "Theoretical Investigation of Oxidative Cleavage of Cholesterol by Dual O2 Activation and Sulfide Reduction." Australian Journal of Chemistry 69, no. 9 (2016): 933. http://dx.doi.org/10.1071/ch16093.

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Theoretical calculations are used to explore a plausible mechanism for oxidative cleavage of cholesterol mediated by two ground-state O2 molecules. It is shown that cholesterol can form a stable pre-complex with the two triplet dioxygen molecules, which could be further stabilized in an enzyme environment by methionine (modelled here as Me2S). Triplet O2 can then react to form a metastable biradical species that is then further stabilized by reaction with a second triplet O2, resulting in an intermediate that undergoes an intersystem crossing to form a diperoxy intermediate. This in turn is re
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Bathellier, Camille, Li-Juan Yu, Graham D. Farquhar, Michelle L. Coote, George H. Lorimer, and Guillaume Tcherkez. "Ribulose 1,5-bisphosphate carboxylase/oxygenase activates O2 by electron transfer." Proceedings of the National Academy of Sciences 117, no. 39 (2020): 24234–42. http://dx.doi.org/10.1073/pnas.2008824117.

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Ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) is the cornerstone of atmospheric CO2 fixation by the biosphere. It catalyzes the addition of CO2 onto enolized ribulose 1,5-bisphosphate (RuBP), producing 3-phosphoglycerate which is then converted to sugars. The major problem of this reaction is competitive O2 addition, which forms a phosphorylated product (2-phosphoglycolate) that must be recycled by a series of biochemical reactions (photorespiratory metabolism). However, the way the enzyme activates O2 is still unknown. Here, we used isotope effects (with 2H, 25Mg, and 18O) to moni
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O’Sullivan, Stephen, Leila Tabrizi, Kaja Turzańska, Ian P. Clark, Deirdre Fitzgerald-Hughes, and Mary T. Pryce. "Photophysical Properties and Protein Binding Studies of Piperazine-Substituted Anthracene-BODIPY Dyads for Antimicrobial Photodynamic Therapy." Molecules 30, no. 13 (2025): 2727. https://doi.org/10.3390/molecules30132727.

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This work presents the synthesis, characterisation, photophysical properties, time-resolved spectroscopic behaviour, and biological evaluation of two structurally distinct heavy-atom-free BODIPY-anthracene dyads (BDP-1) and the newly designed 2,6-bis[1-(tert-butyl) 4-(prop-2-yn-1-yl) piperazine-1,4-dicarboxylate] BODIPY-anthracene (BDP-2), incorporating 2,6-alkynyl-piperazine substituents for potential application in antimicrobial photodynamic therapy. BDP-1 exhibits absorption and emission maxima at 507 nm and 516 nm, respectively, with a Stokes shift of 344 cm−1 in dichloromethane (DCM), cha
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Cho, Eunkyung, Minki Hong, Yu Seok Yang, Yong Joo Cho, Veaceslav Coropceanu, and Jean-Luc Brédas. "Energy transfer processes in hyperfluorescent organic light-emitting diodes." Journal of Materials Chemistry C 10, no. 12 (2022): 4629–36. http://dx.doi.org/10.1039/d1tc05090g.

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In an efficient hyperfluorescent ternary blend, most of the singlet excitons from the TADF sensitizers will efficiently transfer to the emitters while the triplet excitons will first undergo a reverse intersystem crossing transition.
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Book chapters on the topic "Undergoes intersystem crossing"

1

Grossman, J. C., w. A. Lester, and S. G. Louie. "Quantum Monte Carlo density functional theory characterization of 2-cyclopentenone and 3-cyclopentenone formation from 0(3 P) + cyclopentadiene." In Quantum Monte Carlo. Oxford University PressNew York, NY, 2007. http://dx.doi.org/10.1093/oso/9780195310108.003.00130.

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Abstract One of the myriad reactions of interest in the combustion of motor fuels is the addition of an oxygen atom in the 3 P state to cyclopentadiene. The generally accepted mechanism for the reaction begins with addition of the atom to a double bond, and formation of one or the other of two triplet diradicals depending on the point of addition. These can both undergo intersystem crossing to form singlet diradicals which pass through different transition states to the product, 2- or 3-cyclopentenone. In this study possible reaction pathways were investigated using a variety of electronic str
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2

Baer, Tomas, and William L. Hase. "State Preparation and Intramolecular Vibrational Energy Redistribution." In Unimolecular Reaction Dynamics. Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195074949.003.0006.

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The first step in a unimolecular reaction involves energizing the reactant molecule above its decomposition threshold. An accurate description of the ensuing unimolecular reaction requires an understanding of the state prepared by this energization process. In the first part of this chapter experimental procedures for energizing a reactant molecule are reviewed. This is followed by a description of the vibrational/rotational states prepared for both small and large molecules. For many experimental situations a superposition state is prepared, so that intramolecular vibrational energy redistrib
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