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Article
Hole injection from P1 dye hot-excited states in p-type dye-sensitized films: a fluorescence study
We present a study of the excited state relaxation dynamics of the photosensitizer P1 used in p-type dye-sensitized solar cells. Comparative femtosecond fluorescence upconversion measurements in solution and i...
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Article
Open AccessTime-resolved cathodoluminescence of DNA triggered by picosecond electron bunches
Despite the tremendous importance of so-called ionizing radiations (X-rays, accelerated electrons and ions) in cancer treatment, most studies on their effects have focused on the ionization process itself, and...
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Article
Electronic excited states of guanine-cytosine hairpins and duplexes studied by fluorescence spectroscopy
Guanine-cytosine hairpins, containing a hexaethylene glycol bridge, are studied by steady-state fluorescence spectroscopy and time-correlated single photon counting; their properties are compared to those of d...
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Article
A joint experimental/theoretical study of the ultrafast excited state deactivation of deoxyadenosine and 9-methyladenine in water and acetonitrile
The excited states of deoxyadenosine (dA) and 9-methyladenine (9Me-Ade) were studied in water and acetonitrile by a combination of steady-state and time-resolved spectroscopy and quantum chemical calculations....
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Article
Electronically excited states of DNA oligonucleotides with disordered base sequences studied by fluorescence spectroscopy
DNA double-stranded oligomers are studied by steady-state and time-resolved fluorescence spectroscopy from the femtosecond to the nanosecond time-scale, following excitation at 267 nm. It is shown that emissio...
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Article
Long-lived fluorescence of homopolymeric guanine—cytosine DNA duplexes
The fluorescence spectrum of the homopolymeric double helix poly(dG)·poly(dC) is dominated by emission decaying on the nanosecond time-scale, as previously reported for the alternating homologue poly(dGdC)·pol...
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Article
The Carotid Artery Plaque Size and Echogenicity are Related to Different Cardiovascular Risk Factors in the Elderly
Carotid plaques can be characterised by ultrasound by size and echogenicity. Both size and echogenicity are predictors of cardiovascular events. The aim of this study was to examine whether traditional risk fa...
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Chapter
Energy Flow in DNA Duplexes
This chapter focuses on the singlet excited states of model DNA helices with simple base sequence: poly(dGdC).poly(dGdC), poly(dAdT).poly(dAdT) and poly(dA).poly(dT). We discuss their absorption spectra, which...
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Article
Effect of amino substitution on the excited state dynamics of uracil
The excited state deactivation of two amino-substituted uracils, 5-aminouracil (5AU) and 6-aminouracil (6AU) in aqueous solution was studied by femtosecond fluorescence upconversion. The fluorescence of 6AU de...
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Article
Brachial Artery Intima-Media Thickness and Echogenicity in Relation to Lipids and Markers of Oxidative Stress in Elderly Subjects:-The Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS) Study
The aim of the present study was to relate brachial artery intima-media thickness (IMT) and the grey scale median of the intima-media complex (IM-GSM) to traditional cardiovascular risk factors and markers of ...
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Article
Excited states and energy transfer among DNA bases in double helices
The study of excited states and energy transfer in DNA double helices has recently gained new interest connected to the development of computational techniques and that of femtosecond spectroscopy. The present...
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Article
Complexity of excited-state dynamics in DNA
Arising from: C. E. Crespo-Hernández, B. Cohen & B. Kohler Nature 436, 1141–1144 (2005); Crespo-Hernández et al. reply
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Article
Photophysical properties of 5-methylcytidine
Cytosine methylation, which determines the hot spots for DNA photo-damage, is shown to induce a red-shift of the nucleoside absorption spectrum, making the chromophore more vulnerable to solar radiation, and a...
