Photophysics on surfaces: Absorption and luminescence properties of Pheophorbide-a on cellulose
Literature Information
M. Gabriela Lagorio, Enrique San Román, André Zeug, Jörg Zimmermann, Beate Röder
Solid samples of Pheophorbide-a adsorbed on microcrystalline cellulose were prepared with a wide range of dye concentrations (7.1 × 10−9 to 8.9 × 10−6 mol (g cellulose−1) and studied by diffuse reflectance and steady-state and time-resolved fluorescence spectroscopy in the solid state. Absorption spectra obtained by means of reflectance spectroscopy were compared with those found in different environments and carrier systems. No aggregation may be inferred from the spectroscopic data. Changes in the fluorescence spectra with increasing dye concentration are attributed to: (a) reabsorption of luminescence and re-emission and (b) interaction between the excited dye molecule and ground state neighboring molecules. The first effect accounts for the observed differences in emission spectra for thin and thick layers of a given sample. Emission decays are non-exponential even at low dye concentrations. A Förster energy transfer mechanism leading to energy trapping by molecules of the same type as the excited dye is proposed.
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.










![N-[(6-Bromo-3-pyridinyl)methyl]ethanamine structure N-[(6-Bromo-3-pyridinyl)methyl]ethanamine structure](https://static.chemtradehub.com/structs/120/120740-05-8-ca55.webp)
![N-[4-(Cyanoethynyl)phenyl]-16-oxo-4,7,10,13-tetraoxa-17-azahenicos-1-yn-21-amide structure N-[4-(Cyanoethynyl)phenyl]-16-oxo-4,7,10,13-tetraoxa-17-azahenicos-1-yn-21-amide structure](https://static.chemtradehub.com/structs/218/2183440-36-8-68cb.webp)

![Ethanone, 1-[4-chloro-2-(methylthio)-5-pyrimidinyl]- structure Ethanone, 1-[4-chloro-2-(methylthio)-5-pyrimidinyl]- structure](https://static.chemtradehub.com/structs/661/66116-82-3-863e.webp)
