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Issue 11 2008 Chemical Biology now published
16 October 2008
Drawing together coverage from all RSC publications, providing an overview of the latest developments in chemical biology
Contents list for Photochemical & Photobiological Sciences, issue 11, 2008
Front cover
Photochem. Photobiol. Sci., 2008, 7, 1289
DOI: 10.1039/B818212B
Contents and Chemical Biology
Photochem. Photobiol. Sci., 2008, 7, 1291
DOI: 10.1039/B818215A
Perspectives
Time-resolved methods in biophysics. 8. Frequency domain fluorometry: applications to intrinsic protein fluorescence
Justin A. Ross and David M. Jameson,
Photochem. Photobiol. Sci., 2008, 7, 1301
DOI: 10.1039/b804450n
This review focuses on the development and modern implementation of the frequency domain approach to time-resolved fluorescence and its application to intrinsic protein fluorescence.
Micro-photochemistry: photochemistry in microstructured reactors. The new photochemistry of the future?
Emma E. Coyle and Michael Oelgemöller,
Photochem. Photobiol. Sci., 2008, 7, 1313
DOI: 10.1039/b808778d
This article summarises photochemical reactions performed in micro-structured reactors with an emphasis on synthetic applications.
Papers
Photophysics of cyclic multichromophoric systems based on 
-cyclodextrin and calix[4]arene with appended pyridin-2
-yl-1,2,3-triazole groups
Vincent Souchon, Stéphane Maisonneuve, Olivier David, Isabelle Leray, Juan Xie and Bernard Valeur,
Photochem. Photobiol. Sci., 2008, 7, 1323
DOI: 10.1039/b810465d
Tetra- and heptachromophoric systems based on calix[4]arene and -cyclodextrin with covalently linked pyridinyl triazole chromophores, exhibit different photophysical properties, especially in the presence of cadmium and zinc ions.
Substituent effects on the regioselectivity of the Paternò–Büchi reaction of 5- or/and 6-methyl substituted uracils with 4,4-disubstituted benzophenones
Feng-Feng Kong, Bao-Chang Zhai and Qin-Hua Song,
Photochem. Photobiol. Sci., 2008, 7, 1332
DOI: 10.1039/b810640a
The regioselectivity and the efficiency in the Paternò–Büchi reaction of 5- or/and 6-methylsubstituted uracil derivatives with 4,4-disubstituted benzophenones are strongly dependent on methyl substituent(s) at the C5–C6 double bond.
A photoprotection mechanism involving the D2 branch in photosystem II cores with closed reaction centers
Víctor Martínez-Junza, Malwina Szczepaniak, Silvia E. Braslavsky, Julia Sander, Marc Nowaczyk, Matthias Rögner and Alfred R. Holzwarth,
Photochem. Photobiol. Sci., 2008, 7, 1337
DOI: 10.1039/b809884k
The normally inactive D2 branch plays a photoprotective role in closed photosystem II reaction centers when—as a consequence of the negative charge on quinone QA—triplet chlorophyll (3ChlD2) is formed by the radical pair mechanism; 3ChlD2 is subsequently quenched by the D2-carotene.
Photoreduction of 2-methyl-1-nitro-9,10-anthraquinone in the presence of 1-phenylethanol
Henry Gruen and Helmut Görner,
Photochem. Photobiol. Sci., 2008, 7, 1344
DOI: 10.1039/b811372f
The complete photoreduction of 1-nitroAQ is bifunctional, starting by H-transfer from 1-phenylethanol to the triplet state, involving four electron equivalents and at the stage of 1-hydroxylamineAQ, the carbonyl groups function as H-acceptor sites.
A photochemical study on the blue dye indigo: from solution to ancient Andean textiles
Micaela M. Sousa, Catarina Miguel, Isa Rodrigues, A. Jorge Parola, Fernando Pina, J. Sérgio Seixas de Melo and Maria J. Melo,
Photochem. Photobiol. Sci., 2008, 7, 1353
DOI: 10.1039/b809578g
Old blues, on the photostability of the blue dye indigo: studies in solution, in model hydrogel matrices (collagen for wool and carboxymethylcellulose for cotton) and in millenary Andean textiles.
Kinetic analysis and elucidation options for AB(1k,2
) systems. new spectrokinetic methods for photochromes
Mounir Maafi and Robert G. Brown,
Photochem. Photobiol. Sci., 2008, 7, 1360
DOI: 10.1039/b807556e
Diaryethene forward quantum yield is proven to be irradiation dependent by a new kinetic elucidation method. Also, the forward efficiency is found higher than the reverse BA at 345 nm.
Chlorochromate ion as a catalyst for the photodegradation of chloroform by visible light
Anton J. Seidl, Larissa R. Cohen, Laura A. Peña and Patrick E. Hoggard,
Photochem. Photobiol. Sci., 2008, 7, 1373
DOI: 10.1039/b814585g
CrO3Cl- catalyzes the photodecomposition of chloroform in solutions exposed to air. CrO3Cl- is converted during photolysis to CrOCl4-, which participates in an as yet unexplained catalytic cycle involving a photochemical redox reaction with thermal regeneration.
Characterization of new fluorescent labels for ultra-high resolution microscopy
Andriy Chmyrov, Jutta Arden-Jacob, Alexander Zilles, Karl-Heinz Drexhage and Jerker Widengren,
Photochem. Photobiol. Sci., 2008, 7, 1378
DOI: 10.1039/b810991p
A set of rhodamine and pyronin dyes were investigated with respect to their triplet state dynamics and photostabilities. Based of FCS investigations, several dyes were found to meet requirements for ultra-high resolution microscopy, combining a prominent triplet state yield with reasonable photostability.
Radical cage effects: A method for measuring recombination efficiencies of secondary geminate radical cage pairs using pump–probe transient absorption methods
Alan B. Oelkers and David R. Tyler,
Photochem. Photobiol. Sci., 2008, 7, 1386
DOI: 10.1039/b804399j
A method is reported for measuring the recombination efficiency of secondary geminate radical cage pairs (Fc2 = kc2/(kc2 + kd2).
Luminescent Eu(III) hybrid materials for sensor applications
Beatriz Carmen Barja and Pedro Francisco Aramendía,
Photochem. Photobiol. Sci., 2008, 7, 1391
DOI: 10.1039/b806071a
An hybrid luminescent Eu(III) matrix was synthesized from a bis(trialkoxysilyl) organic precursor. In situ quenching measurements by Cu(II) yields a detection limit of 0.05 ppm of Cu(II) making these materials useful for metal sensor devices.
Visible light photo-oxidations in the presence of 
-Bi2O3
Joachim Eberl and Horst Kisch,
Photochem. Photobiol. Sci., 2008, 7, 1400
DOI: 10.1039/b811197a
-Bismuth oxide prepared by different methods and characterized photoelectrochemically assists efficient stoichiometric visible light mineralization of various pollutants.
Photoinduced electron transfer reaction of tris(4,4-dicarboxyl-2,2-bipyridine)ruthenium(II) ion with organic sulfides
Eswaran Rajkumar and Seenivasan Rajagopal,
Photochem. Photobiol. Sci., 2008, 7, 1407
DOI: 10.1039/b806974c
The excited state of [Ru(dcbpy)3]2+ complex undergoes facile one electron transfer reaction with organic sulfides.
Low concentrations of a non-hydrolysable tetra-S-glycosylated porphyrin and low light induces apoptosis in human breast cancer cells via stress of the endoplasmic reticulum
Sebastian Thompson, Xin Chen, Li Hui, Alfredo Toschi, David A. Foster and Charles Michael Drain,
Photochem. Photobiol. Sci., 2008, 7, 1415
DOI: 10.1039/b806536e
Apoptosis is initiated at the endoplasmic reticulum by low concentrations of a glycosylated porphyrin and low light.
Technical Note
In vivo nonlinear spectral imaging microscopy of visible and ultraviolet irradiated hairless mouse skin tissues
Jonathan A. Palero, Henriëtte S. de Bruijn, Angélique van der Ploeg van den Heuvel, Henricus J. C. M. Sterenborg, Huib van Weelden and Hans C. Gerritsen,
Photochem. Photobiol. Sci., 2008, 7, 1422
DOI: 10.1039/b808776h
Nonlinear spectral imaging microscopy reveals differences between control and UV-exposed mouse skin in vivo based on the recorded optically-sectioned images of unstained tissues, layer-resolved emission spectra and relative contributions of naturally fluorescing components.
Back matter
Photochem. Photobiol. Sci., 2008, 7, 1426
DOI: 10.1039/B818217P
Back cover
Photochem. Photobiol. Sci., 2008, 7, 1427
DOI: 10.1039/B818219C
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