March 2012 – PPS Blog

Archive for March, 2012

Top ten most accessed articles in February

27 Mar 2012

This month sees the following articles in PPS that are in the top ten most accessed:-

Targeted photodynamic therapy of breast cancer cells using antibody-phthalocyanine-gold nanoparticle conjugates
Tanya Stuchinskaya, Miguel Moreno, Michael J. Cook, Dylan R. Edwards and David A. Russell
Photochem. Photobiol. Sci., 2011, 10, 822-831, DOI: 10.1039/C1PP05014A

Environmental effects of ozone depletion and its interactions with climate change: progress report, 2011
United Nations Environment Programme, Environmental Effects Assessment Panel
Photochem. Photobiol. Sci., 2012, 11, 13-27, DOI: 10.1039/C1PP90033A

Photo-oxidation of proteins
David I. Pattison, Aldwin Suryo Rahmanto and Michael J. Davies
Photochem. Photobiol. Sci., 2011, Advance Article, DOI: 10.1039/C1PP05164D

Photochemical release of methotrexate from folate receptor-targeting PAMAM dendrimer nanoconjugate
Seok Ki Choi, Thommey P. Thomas, Ming-Hsin Li, Ankur Desai, Alina Kotlyar and James R. Baker
Photochem. Photobiol. Sci., 2012, Advance Article, DOI: 10.1039/C2PP05355A

Ozone depletion and climate change: impacts on UV radiation
R. L. McKenzie, P. J. Aucamp, A. F. Bais, L. O. Björn, M. Ilyas and S. Madronich
Photochem. Photobiol. Sci., 2011, 10, 182-198, DOI: 10.1039/C0PP90034F

Photoactivatable fluorophores and techniques for biological imaging applications
Wen-hong Li and Genhua Zheng
Photochem. Photobiol. Sci., 2012, Advance Article, DOI: 10.1039/C2PP05342J

Photoinduced formation of reversible dye radicals and their impact on super-resolution imaging
Sebastian van de Linde, Ivan Krstić, Thomas Prisner, Sören Doose, Mike Heilemann and Markus Sauer
Photochem. Photobiol. Sci., 2011, 10, 499-506, DOI: 10.1039/C0PP00317D

UV wavelength-dependent DNA damage and human non-melanoma and melanoma skin cancer
Gerd P. Pfeifer and Ahmad Besaratinia
Photochem. Photobiol. Sci., 2012, 11, 90-97, DOI: 10.1039/C1PP05144J

Engineered photoreceptors as novel optogenetic tools
Andreas Möglich and Keith Moffat
Photochem. Photobiol. Sci., 2010, 9, 1286-1300, DOI: 10.1039/C0PP00167H, Perspective

UVA filters in sun-protection products: regulatory and biological aspects
A. Fourtanier, D. Moyal and S. Seite
Photochem. Photobiol. Sci., 2012, 11, 81-89, DOI: 10.1039/C1PP05152K

Why not take a look at the articles today and blog your thoughts and comments below.

Fancy submitting an article to PPS? Then why not submit to us today or alternatively email us your suggestions.

Comments Off on Top ten most accessed articles in February

PPS Issue 4 published online

22 Mar 2012

Photochemical & Photobiological Sciences issue 4 is now online; you can read the full issue here. The front cover of this issue highlights work from Gabriela Lagorio and co-workers from the University of Buenos Aires in Argentina. I their article the chlorophyll fluorescence from kiwi fruit is studied and modeled from the emission of the different parts of the fruit.

Several fruits (apples, pears, bananas, kiwi fruit, mango, avocado, etc.) contain chlorophyll displaying red fluorescence similar to that emitted by leaves. Kiwi fruit is one of the few fruits containing chlorophyll that retains the green colour during ripening. As chlorophyll fluorescence is connected with the photosystems’ behaviour in the fruit, it may be explored as a tool for quality sensing. This manuscript contributes to the understanding of both basic biospectroscopy of chlorophyll fluorescence and the non-destructive monitoring of kiwi fruit during storage.

Read the full article for free for six weeks!

Modelling chlorophyll fluorescence of kiwi fruit (Actinidia deliciosa)
Johanna Mendes Novo, Analia Iriel and M. Gabriela Lagorio
Photochem. Photobiol. Sci., 2012, 11, 724-730 DOI: 10.1039/C2PP05299G

Comments Off on PPS Issue 4 published online

Energy transfer from a rhodamine antenna to a ruthenium–bipyridine center

15 Mar 2012

Graphical abstract: Energy transfer from a rhodamine antenna to a ruthenium–bipyridine center In a recently published PPS article a team from Argentina demonstrate a way to enable a photodissociation reaction at longer wavelengths by utilising a modified rhodamine B (Rhod) cooridinated to a bis-bipyridine ruthenium (II) (Ru-bpy) phototrigger complex which has enhanced absorption of green light.

Due to the fundamental photochemistry of the system it has not been possible to obtain a phototrigger presenting both high absorption at longer wavelengths (500nm) and a high photorelease quantum yield. In this study the problem is circumvented by a coordinated fluorescent fragment harvesting long wavelength light and transferring this energy to the ruthenium centre, allowing high photoactivity at long wavelengths with very high absorptivity and high energy transfer quantum yield.

The behaviour of phototriggers, which releace a monodentate ligand through the d-d decomposition path, can be used to design caged compounds. Many molecules, including neurotransmitters and other biomolecules can be photodelivered using these complexes, which makes this one of the most promising techniques to cage drugs for photodynamic therapies, for neuroscience and for photoregulation of biological processes in general. This new mechanism found in a rhodamine-enhanced ruthenium phototrigger opens a full set of possibilities for designing Ru–bpy sensitizers, based in rhodamine and possibly other fluorescent dyes.

Read the full article for free until 10^th April by clicking on the title below:

Energy transfer from a rhodamine antenna to a ruthenium–bipyridine center
Oscar Filevich, Beatriz García-Acosta and Roberto Etchenique
Photochem. Photobiol. Sci., 2012, Advance Article, DOI: 10.1039/C2PP05415A

Comments Off on Energy transfer from a rhodamine antenna to a ruthenium–bipyridine center

Themed issue on photoremovable protecting groups is now online!

02 Mar 2012

PPS Issue 3 is now online and is a themed issue on photoremovable protecting groups: development and applications, see the full issue here. This themed issue presents research papers and perspectives on applications of photoremovable protecting groups that provide spatial and temporal control over the release of various chemicals and bioagents. Read Guest Editor Jacob Wirz’s Editorial which introduces the topic here.

The front cover represents an article by Andrei G. Kutateladze and co-workers from the University of Denver in the USA. In their study externally sensitized fragmentation in dithiane PPG-protected carbonyls is adopted for detection and amplification of binding events, which trigger massive self-amplified release of benzophenone from its masked state, simultaneously quenching the fluorescence. Read the full article for free here until 12^th April!

Comments Off on Themed issue on photoremovable protecting groups is now online!

PPS Blog

Archive for March, 2012

Top ten most accessed articles in February

PPS Issue 4 published online

Energy transfer from a rhodamine antenna to a ruthenium–bipyridine center

Themed issue on photoremovable protecting groups is now online!

Links

Categories

Archives

Meta