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Ultrafast Excited-State Deactivation of 8-Hydroxy-2′-deoxyguanosine Studied by Femtosecond Fluorescence Spectroscopy and Quantum-Chemical Calculations

18-Mar-2015 | Pascale Changenet-Barret; Thomas Gustavsson; Roberto Improta; Dimitra Markovitsi, Journal of Physical Chemistry A, 2015

The fluorescence properties of the 8-hydroxy-2′-deoxyguanosine (8-oxo-dG) in aqueous solution at pH 6.5 are studied by steady-state spectroscopy and femtosecond fluorescence up-conversion and compared with those of 2′-deoxyguanine (dG) and 2′-deoxyguanine monophosphate (dGMP). The steady-state ...


Development of a sensitive, stable and EGFR‐specific molecular imaging agent for surface enhanced Raman spectroscopy

17-Mar-2015 | Leanne J. Lucas, Claudio Tellez, Maiara L. Castilho, Christopher L. D. Lee, Michael A. Hupman, Lais S. Vieira, Isabe ..., Journal of Raman Spectroscopy, 2015

We created and studied a novel nanoprobe for spectroscopic molecular imaging of the epidermal growth factor (EGF) receptor, whose over‐expression is a hallmark of a wide range of cancers. Silver nanoparticles (AgNPs) of 45 nm diameter were synthesized and coupled to EGF by α‐lipoic acid, a short ...


Conserved hydrogen bonding in tetrahydrocarbazolone derivatives: influence of solution-state assembly on crystal form nucleation

17-Mar-2015 | Robert M. Edkins; Elliott Hayden; Jonathan W. Steed; Katharina Fucke, Chemical Communication, 2015

Two tetrahydocarbazolone derivatives were found to show multiple unsolvated crystal forms. A persistent dimer motif was detected in solution by FTIR spectroscopy that is maintained in the kinetic crystal forms. Rationally introduced steric bulk induces the formation of a more stable catemeric ...


Protomers of Benzocaine: Solvent and Permittivity Dependence

17-Mar-2015 | Stephan Warnke; Jongcheol Seo; Jasper Boschmans; Frank Sobott; James H. Scrivens; Christian Bleiholder; Michael T. B ..., Journal of the American Chemical Society, 2015

The immediate environment of a molecule can have a profound influence on its properties. Benzocaine, the ethyl ester of para-aminobenzoic acid that finds an application as a local anesthetic, is found to adopt in its protonated form at least two populations of distinct structures in the gas ...


Enzyme Induced Formation of Monodisperse Hydrogel Nanoparticles Tunable in Size

17-Mar-2015 | Vera Bocharova; Danna Sharp; Aaron Jones; Shiwang Cheng; Philip J. Griffin; Alexander L. Agapov; Dmitry Voylov; Yang ..., Chemistry of Materials, 2015

We report a novel approach to synthesize monodisperse hydrogel nanoparticles that are tunable in size. The distinctive feature of our approach is the use of a multicopper oxidase enzyme, laccase, as both a biocatalyst and template for nanoparticle growth. We utilize the ferroxidase activity of ...


Rheology and crystallization behavior of PLLA/TiO2‐g‐PDLA composites

13-Mar-2015 | Zhanxin Jing, Xuetao Shi, Guangcheng Zhang, Jiang Li, Polymers for Advanced Technologies, 2015

Poly(L‐lactide) (PLLA) composites with TiO2‐g‐poly(D‐lactide) (PDLA), which was synthesized by surface‐initiated opening ring polymerization with TiO2 as initiator and Sn(Oct)2 as catalyst, were prepared by solution casting. The synthesized TiO2‐g‐PDLA was characterized by transmission electron ...


Facile Method To Synthesize Na-Enriched Na1+xFeFe(CN)6 Frameworks as Cathode with Superior Electrochemical Performance for Sodium-Ion Batteries

12-Mar-2015 | Wei-Jie Li; Shu-Lei Chou; Jia-Zhao Wang; Yong-Mook Kang; Jian-Li Wang; Yong Liu; Qin-Fen Gu; Hua-Kun Liu; Shi-Xue Dou, Chemistry of Materials, 2015

Different Na-enriched Na1+xFeFe(CN)6 samples can be synthesized by a facile one-step method, utilizing Na4Fe(CN)6 as the precursor in a different concentration of NaCl solution. As-prepared samples were characterized by a combination of synchrotron X-ray powder diffraction (S-XRD), Mössbauer ...


NMR Techniques for Noble Metal Nanoparticles

11-Mar-2015 | Lauren E. Marbella; Jill E. Millstone, Chemistry of Materials, 2015

Solution phase noble metal nanoparticle growth reactions are comprised of deceptively simple steps. Analytical methods with high chemical, spatial, and temporal resolution are crucial to understanding these reactions and subsequent nanoparticle properties. However, approaches for the ...


Recovery and characterization of lignin from alkaline straw pulping black liquor: As feedstock for bio‐oil research

10-Mar-2015 | Zhengbin Tian, Lei Zong, Rujie Niu, Xiao Wang, Yan Li, Shiyun Ai, Journal of Applied Polymer Science, 2015

ABSTRACT Conversion of lignin derived from lignocellulosic biomass to bio‐oil has the promising potential to significantly reduce petroleum dependence. For that purpose, it is necessary to search for a low‐cost lignin source. In this study, lignin sample was separated from straw pulping black ...


Measurement of the 240Pu/239Pu Mass Ratio Using a Transition-Edge-Sensor Microcalorimeter for Total Decay Energy Spectroscopy

10-Mar-2015 | Andrew S. Hoover; Evelyn M. Bond; Mark P. Croce; Terry G. Holesinger; Gerd J. Kunde; Michael W. Rabin; Laura E. Wolf ..., Analytical Chemistry, 2015

We have developed a new category of sensor for measurement of the 240Pu/239Pu mass ratio from aqueous solution samples with advantages over existing methods. Aqueous solution plutonium samples were evaporated and encapsulated inside of a gold foil absorber, and a superconducting ...


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