Intermolecular electron transfer in merocyanine aggregates studied by optical and transient EPR methods
Literature Information
Lorenzo Franco, Luigi Pasimeni, Glauco Ponterini, Marco Ruzzi, Ulderico Segre
Excited states of two merocyanine chromophores have been studied by means of optical and magnetic resonance techniques. The dye molecules were dissolved in solvents of different polarity and cast in thin films on quartz surfaces. The optical absorption and emission spectra of both molecules indicate a little charge-transfer character in the S0–S1 transition. The cast films contain monomers and H type aggregates. EPR spectra have been obtained by time resolved techniques at low temperature after illumination of the sample. EPR spectra of isolated molecules in frozen solutions are typical of triplet excited states generated by spin–orbit promoted intersystem crossing. Two signals are observed in EPR spectra of the cast films, with a narrow line in emission superimposed on a very weak molecular triplet lineshape. The polarization and lineshape analysis suggest that a radical ion pair with a lifetime of the order of microseconds is formed by intermolecular charge migration following the photoinduced electron-transfer reaction between the donor and acceptor moieties of the chromophore.
Related Literature
You might also like
What are the main uses of (3.beta.)-3-Hydroxy-N,N-dimethyl-chol-5-en-24-amide (CAS: 79066-03-8)?
(3.beta.)-3-Hydroxy-N,N-dimethyl-chol-5-en-24-amide (CAS: 79066-03-8) is primari...
What regulatory guidelines apply to 5-(aminomethyl)-2-methoxyphenol (CAS: 89702-89-6)?
5-(Aminomethyl)-2-methoxyphenol (CAS: 89702-89-6) is classified under GHS as a s...
What is Thieno[2,3-c]pyridin-7(6H)-one (CAS: 28981-13-7)?
Thieno[2,3-c]pyridin-7(6H)-one (CAS: 28981-13-7) is a heterocyclic organic compo...
Is 1-[(6-Methoxy-3-pyridinyl)methyl]-4-piperidinamine dihydrochloride (CAS: 1185311-28-7) safe?
1-[(6-Methoxy-3-pyridinyl)methyl]-4-piperidinamine dihydrochloride is generally ...
What regulatory guidelines apply to [(2E)-3-Phenyl-2-propen-1-yl]phosphonic acid (CAS: 146404-58-2)?
[(2E)-3-Phenyl-2-propen-1-yl]phosphonic acid (CAS: 146404-58-2) is regulated und...
What regulatory guidelines apply to 6-Bromo-7-methoxyquinoline (CAS: 1620515-86-7)?
6-Bromo-7-methoxyquinoline (CAS: 1620515-86-7) falls under the scope of the Glob...
What industries use (2R)-1-(1-Benzofuran-2-yl)-N-propyl-2-pentanamine (CAS: 260550-89-8)?
This compound is primarily used in the pharmaceutical industry for the developme...
What are the main uses of 1-Ethyl-7-[2-methyl-6-(4H-1,2,4-triazol-3-yl)-3-pyridinyl]-3,5-dihydropyrazino[2,3-b]pyrazin-2(1H)-one (CAS: 1228013-15-7)?
1-Ethyl-7-[2-methyl-6-(4H-1,2,4-triazol-3-yl)-3-pyridinyl]-3,5-dihydropyrazino[2...
Are there alternatives to {5-(Acryloylamino)-2-[(dimethylamino)methyl]phenyl}boronic acid (CAS: 1217500-78-1) in synthesis?
Alternative reagents such as 2-[(dimethylamino)methyl]phenylboronic acid or rela...
What is 3-(Piperidin-4-yloxy)pyridine (CAS: 310881-48-2)?
3-(Piperidin-4-yloxy)pyridine (CAS: 310881-48-2) is an organic compound with the...
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.














