Intersystem crossing (ISC) in DMABN and DMABA: Laser induced optoacoustic spectroscopy and semi-empirical (AM1) calculations
Literature Information
The individual contribution of the intersystem crossing (ISC) process in the total non-radiative deactivation ofthe excited fluorophores, p-N,N-dimethylaminobenzonitrile (DMABN) and p-N,N-dimethylaminobenzaldehyde(DMABA) was determined by laser-induced optoacoustic spectroscopy (LIOAS). It was noted that, for DMABN, the ISC yield is almost insensitive to the solvent polarity, while, it is highly solvent dependent for DMABA. Semi-empirical (AM1) calculations have been performed to optimize the ground state geometry of both the fluorophores. The AM1-SCI (singly excited configuration interaction) method has been adopted to get the energies and the dipole moments of their excited states. From the calculated oscillator strengths for the optical transitions and also from absorption studies in solvents of different polarity it is revealed that DMABN isexcitedtotheS2stateandDMABAtotheS3stateselectivelywithalaserbeamof320nm.Theexperimental results for the large variation of the ISC yield (φISC) in DMABA has been ascribed to the reordering of the nπ* and ππ* states with a change in the solvent polarity.
Related Literature
Enzyme immobilized millimeter-sized polyHIPE beads with easy separability and recyclability
Mengjie Wang, Meng Wang, Yun Zhu, Shengmiao Zhang, Jianding Chen
DOI: 10.1039/C9RE00065H
Enhanced reactive CO2 species formation via V2O5-promoted Ni/KCC-1 for low temperature activation of CO2 methanation
Muhamed Yusuf Shahul Hamid, Anis Farhana Abdul Rahman
DOI: 10.1039/C8RE00312B
Decomposition kinetics for HONO and HNO2
Xi Chen, Mark E. Fuller, C. Franklin Goldsmith
DOI: 10.1039/C8RE00201K
Hydrogen and steam injected tandem μ-reactor GC/FID system: phenol recovery from bisphenol A and alkylphenols using Ni/Y zeolite
S. Kumagai, M. Asakawa, T. Kameda, Y. Saito, A. Watanabe, C. Watanabe, T. Yoshioka
DOI: 10.1039/C9RE00299E
Continuous synthesis of Zn2Al–CO3 layered double hydroxides: a comparison of bench, pilot and industrial scale syntheses
R. L. Gomes, C. Crawshaw, L. Neve, R. Lodge, M. Fay, C. Winkler, M. Hull, E. Lester
DOI: 10.1039/C8RE00241J
Homogeneous synthesis of hydroxylamine hydrochloride via acid-catalyzed hydrolysis of nitromethane
Fanglin Huo, Yangcheng Lu
DOI: 10.1039/C9RE00468H
Lignin valorization process control under feedstock uncertainty through a dynamic stochastic programming approach
Hanxi Bao, Zhiqiang Zhou, Georgios Kotsalis, Guanghui Lan, Zhaohui Tong
DOI: 10.1039/C9RE00176J
The interplay between ceria particle size, reducibility, and ethanol oxidation activity of ceria-supported gold catalysts
Gregory M. Mullen, Edward J. Evans, Jr., Benjamin C. Siegert, Nathan R. Miller, Benjamin K. Rosselet, Iliya Sabzevari, Adrianna Brush, Zhiyao Duan
DOI: 10.1039/C7RE00175D
Operation range extension via hot-spot control for catalytic CO2 methanation reactors
Jens Bremer
DOI: 10.1039/C9RE00147F
You might also like
What is 3-Fluoro-2-methylbenzylamine (CAS: 771573-36-5)?
3-Fluoro-2-methylbenzylamine is an organic compound with the CAS number 771573-3...
Is Tert-butyl 2-(oxetan-3-ylidene)acetate (CAS: 1207175-03-8) safe?
Tert-butyl 2-(oxetan-3-ylidene)acetate is considered safe for its intended uses ...
What precautions should be taken when handling 4-Acetyl-2-fluorobenzonitrile (CAS: 214760-18-6)?
Proper personal protective equipment (PPE) such as gloves, goggles, and a lab co...
How is 2-Ethyl-4-methyl-1,3-thiazole (CAS: 15679-12-6) typically synthesized?
2-Ethyl-4-methyl-1,3-thiazole is commonly synthesized via the reaction of thiour...
How should 5',5''-([2,2'-Bithiophene]-5,5'-diyl)bis(([1,1':3',1''-terphenyl]-4,4''-dicarboxylic acid)) (CAS: 1227780-71-3) be stored?
This compound should be stored in a cool, dry place away from direct sunlight an...
What regulatory guidelines apply to L-Lysine Acetate Salt (CAS: 52315-92-1)?
L-Lysine Acetate Salt (CAS: 52315-92-1) is subject to various regulatory guideli...
Is 6-Fluoro-3-hydroxy-2-pyrazinecarboxamide (CAS: 259793-96-9) safe?
6-Fluoro-3-hydroxy-2-pyrazinecarboxamide (CAS: 259793-96-9) is generally conside...
What are the physical and chemical properties of 1,1'-Sulfonylbis(1H-imidazole) (CAS: 7189-69-7)?
1,1'-Sulfonylbis(1H-imidazole) is a crystalline solid with a molecular weight of...
What industries use 4-methyl-7-nitro-1H-indole-3-carbonitrile (CAS: 289483-82-5)?
4-Methyl-7-nitro-1H-indole-3-carbonitrile (CAS: 289483-82-5) is primarily used i...
How should waste containing 5-Bromo-3-indolyl-beta-galactoside (CAS: 97753-82-7) be handled?
Waste containing 5-Bromo-3-indolyl-beta-galactoside (CAS: 97753-82-7) should be ...
Source Journal
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.













![1,1'-[(E)-1,2-Ethenediyl]bis(4-bromobenzene) structure 1,1'-[(E)-1,2-Ethenediyl]bis(4-bromobenzene) structure](https://static.chemtradehub.com/structs/188/18869-30-2-c907.webp)
