Rose Bengal adsorbed on microgranular cellulose: evidence on fluorescent dimers

Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology
Hernán B RodríguezEnrique San Román

Abstract

Rose Bengal adsorbed on microgranular cellulose was studied in the solid phase by total and diffuse reflectance and steady-state emission spectroscopy. A simple monomer-dimer equilibrium fitted reflectance data up to dye loadings of 4 x 10(-7) mol (g cellulose)(-1) and allowed calculation of monomer and dimer spectra. Further increase of dye loading resulted in the formation of higher aggregates. Observed emission and excitation spectra and quantum yields were corrected for reabsorption and reemission of luminescence, using a previously developed model, within the assumption that only monomers are luminescent [M. G. Lagorio, L. E. Dicelio, M. I. Litter and E. San Roman, J. Chem. Soc., Faraday Trans., 1998, 94, 419]. An apparent increase of fluorescence quantum yield with dye loading was found, which was attributed to the occurrence of dimer fluorescence. Extension of the model to two luminescent species (i.e. monomer and dimer) yielded constant fluorescence quantum yields for the monomer, phiM= 0.120 +/- 0.004, and for the dimer, phiD= 0.070 +/- 0.006. The monomer quantum yield is close to the value found for the same dye in basic ethanol. The presence of fluorescent dimers and calculated quantum yields are supported by analysi...Continue Reading

References

Mar 1, 1969·Photochemistry and Photobiology·P G SeyboldJ Callis
Oct 31, 2002·Photochemistry and Photobiology·Neil M SpeirsAnita C Jone
Mar 28, 2003·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Simon FitzGeraldMartin R Bryce
May 7, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Martin MirendaEnrique San Román
Dec 1, 1992·Journal of Photochemistry and Photobiology. B, Biology·A C CroceG Bottiroli

❮ Previous
Next ❯

Citations

May 11, 2006·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·María E Ramos, María G Lagorio
Aug 4, 2006·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Gabriela B Cordón, María G Lagorio
Sep 29, 2009·Photomedicine and Laser Surgery·Rosangela de Carvalho GoulartPietro Ciancaglini
Apr 3, 2012·Photochemistry and Photobiology·Hernán B RodríguezLuis F Vieira Ferreira
Dec 3, 2014·Journal of Photochemistry and Photobiology. B, Biology·María Beatriz Espeche TurbayClaudio D Borsarelli
Mar 13, 2008·Journal of Fluorescence·Xian-Fu ZhangFushi Zhang
Mar 14, 2017·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Brian Ospina CalvoM Gabriela Lagorio
Mar 10, 2017·Methods and Applications in Fluorescence·Sergio D Ezquerra RiegaEnrique San Román
Feb 9, 2012·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Paulo DuarteEnrique San Román
Jul 4, 2008·Annals of the New York Academy of Sciences·Hernán B Rodríguez, Enrique San Román
Mar 12, 2010·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Analia Iriel, María Gabriela Lagorio
Feb 19, 2010·Physical Chemistry Chemical Physics : PCCP·Sergio G LópezEnrique San Román
Oct 13, 2006·Photochemistry and Photobiology·Hernán B Rodríguez, Enrique San Román
Feb 18, 2012·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Eugenia P TomasiniEnrique San Román
Sep 10, 2005·Photochemistry and Photobiology·Hernán B RodríguezEnrique San Román
Jul 12, 2014·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Sergio G LopezEnrique San Román
Feb 18, 2012·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Johanna Mendes NovoM Gabriela Lagorio
Jun 6, 2013·Photochemistry and Photobiology·Hernán B Rodríguez, Enrique San Román
Sep 23, 2020·Materials·Tingting WangQingqing Wang
Jan 12, 2021·Photochemistry and Photobiology·Bryan MendesIrene E Kochevar
Apr 21, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Eugenia P TomasiniSilvia E Braslavsky
Sep 9, 2008·The Journal of Physical Chemistry. B·Martín MirendaEnrique San Román
Oct 11, 2017·ACS Omega·Emilio I AlarconIrene E Kochevar
Jul 30, 2019·ACS Applied Materials & Interfaces·Wangbingfei ChenQingqing Wang
Nov 30, 2018·Accounts of Chemical Research·Hernán B RodríguezEnrique San Román

❮ Previous
Next ❯

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Langmuir : the ACS Journal of Surfaces and Colloids
Martin MirendaEnrique San Román
Physical Chemistry Chemical Physics : PCCP
Sergio G LópezEnrique San Román
Photochemistry and Photobiology
Hernán B RodríguezEnrique San Román
© 2022 Meta ULC. All rights reserved