共查询到20条相似文献,搜索用时 281 毫秒
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Elisabeth Siebert Marius Horch Yvonne Rippers Dr. Johannes Fritsch Dr. Stefan Frielingsdorf Prof. Dr. Oliver Lenz Francisco Velazquez Escobar Prof. Dr. Friedrich Siebert Lars Paasche Dr. Uwe Kuhlmann Dr. Friedhelm Lendzian Prof. Dr. Maria‐Andrea Mroginski Dr. Ingo Zebger Prof. Dr. Peter Hildebrandt 《Angewandte Chemie (International ed. in English)》2013,52(19):5186-5186
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Inside Back Cover: Self‐Assembly of Measles Virus Nucleocapsid‐like Particles: Kinetics and RNA Sequence Dependence (Angew. Chem. Int. Ed. 32/2016) 下载免费PDF全文
Dr. Sigrid Milles Dr. Malene Ringkjøbing Jensen Dr. Guillaume Communie Damien Maurin Dr. Guy Schoehn Prof. Rob W. H. Ruigrok Dr. Martin Blackledge 《Angewandte Chemie (International ed. in English)》2016,55(32):9441-9441
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Inside Cover: Molecular Recognition by a Short Partial Peptide of the Adrenergic Receptor: A Bottom‐Up Approach (Angew. Chem. Int. Ed. 20/2018) 下载免费PDF全文
Tsubasa Sekiguchi Masato Tamura Hikari Oba Dr. Pierre Çarçarbal Dr. Rolando Rafael Lozada‐Garcia Prof. Dr. Anne Zehnacker‐Rentien Dr. Gilles Grégoire Prof. Dr. Shun‐ichi Ishiuchi Prof.Dr. Masaaki Fujii 《Angewandte Chemie (International ed. in English)》2018,57(20):5558-5558
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Cover Picture: Dipolar Rotors Orderly Aligned in Mesoporous Fluorinated Organosilica Architectures (Angew. Chem. Int. Ed. 16/2015) 下载免费PDF全文
Dr. Silvia Bracco Dr. Mario Beretta Dr. Alice Cattaneo Prof. Angiolina Comotti Prof. Andrea Falqui Dr. Ke Zhao Prof. Charles Rogers Prof. Piero Sozzani 《Angewandte Chemie (International ed. in English)》2015,54(16):4681-4681
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Inside Back Cover: Accelerating Diffusion‐Ordered NMR Spectroscopy by Joint Sparse Sampling of Diffusion and Time Dimensions (Angew. Chem. Int. Ed. 25/2014) 下载免费PDF全文
Mateusz Urbańczyk Prof. Dr. Wiktor Koźmiński Dr. Krzysztof Kazimierczuk 《Angewandte Chemie (International ed. in English)》2014,53(25):6569-6569
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Laurent Dreesen Yannick Sartenaer Christophe Humbert Alaa A Mani Christophe Méthivier Claire-Marie Pradier Paul A Thiry André Peremans 《Chemphyschem》2004,5(11):1719-1725
Infrared/visible sum-frequency generation (SFG) spectroscopy is used to study the recognition of a protein (avidin) by a derived vitamin (biocytin) adsorbed on a calcium fluoride substrate. The specificity of the process is tested by replacing avidin with bovine serum albumin or presaturated avidin. The SFG spectroscopy shows drastic modifications in the CH and NH spectral ranges only upon exposure of the biocytin film to avidin. The comparison of the SFG data with Fourier transform infrared reflection absorption spectra (FT-IRRAS) in the same spectral ranges illustrates the advantages of nonlinear spectroscopy for studying and detecting recognition between biomolecules. 相似文献
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Inside Cover: A Rotational BODIPY Nucleotide: An Environment‐Sensitive Fluorescence‐Lifetime Probe for DNA Interactions and Applications in Live‐Cell Microscopy (Angew. Chem. Int. Ed. 1/2016) 下载免费PDF全文
Dr. Dmytro Dziuba Dr. Piotr Jurkiewicz Dr. Marek Cebecauer Prof. Dr. Martin Hof Prof. Dr. Michal Hocek 《Angewandte Chemie (International ed. in English)》2016,55(1):2-2
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Benjamin Dietzek Wolfgang Kiefer Arkady Yartsev Villy Sundstr?m Peter Schellenberg Paulius Grigaravicius Gudrun Hermann Jürgen Popp Michael Schmitt 《Chemphyschem》2006,7(8):1727-1733
The excited-state processes of protochlorophyllide a, the precursor of chlorophyll a in chlorophyll biosynthesis, are studied using picosecond time-resolved fluorescence spectroscopy. Following excitation into the Soret band, two distinct fluorescence components, with emission maxima at 640 and 647 nm, are observed. The 640 nm emitting component appears within the time resolution of the experiment and then decays with a time constant of 27 ps. In contrast, the 647 nm emitting component is built up with a 3.5 ps rise time and undergoes a subsequent decay with a time constant of 3.5 ns. The 3.5 ps rise kinetics are attributed to relaxations in the electronically excited state preceding the nanosecond fluorescence, which is ascribed to emission out of the thermally equilibrated S(1) state. The 27 ps fluorescence, which appears within the experimental response of the streak camera, is suggested to originate from a second minimum on the excited-state potential-energy surface. The population of the secondary excited state is suggested to reflect a very fast motion out of the Franck-Condon region along a reaction coordinate different from the one connecting the Franck-Condon region with the S(1) potential-energy minimum. The 27 ps-component is an emissive intermediate on the reactive excited-state pathway, as its decay yields the intermediate photoproduct, which has been identified previously (J. Phys. Chem. B 2006, 110, 4399-4406). No emission of the photoproduct is observed. The results of the time-resolved fluorescence study allow a detailed spectral characterization of the emission of the excited states in protochlorophyllide a, and the refinement of the kinetic model deduced from ultrafast absorption measurements. 相似文献
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Claire Mantel Hongyu Chen Robert H Crabtree Gary W Brudvig Jacques Pécaut Marie-No?lle Collomb Carole Duboc 《Chemphyschem》2005,6(3):541-546
The isolation, structural characterization, and electronic properties of two six-coordinated chloromanganese (III) complexes, [Mn(terpy)(Cl)3] (1) and [Mn(Phterpy)(Cl)3] (2), are reported (terpy = 2,2':6'2"-terpyridine, Phterpy = 4'-phenyl-2,2':6',2"-terpyridine). These complexes complement a series of mononuclear azide and fluoride Mn(lll) complexes synthesized with neutral N-tridentate ligands, [Mn(L)(X)3] (X = F- or N3 and L = terpy or bpea [N,N-bis(2-pyridylmethyl)-ethylamine)], previously described. Similar to these previous complexes, 1 and 2 exhibit a Jahn-Teller distortion of the octahedron, characteristic of a high-spin Mn(III) complex (S = 2). The analysis of the crystallographic data shows that, in both cases, the manganese ion lies in the center of a distorted octahedron characterized by an elongation along the tetragonal axis. Their electronic properties were investigated by multifrequency EPR (190-475 GHz) performed in the solid state at different temperatures (5-15 K). This study confirms our previous results and further shows that: i) the sign of D is correlated with the nature of the tetragonal distortion; ii) the magnitude of D is not sensitive to the nature of the anions in our series of rhombic complexes, contrary to the porphyrinic systems; iii) the [E/D] values (0.124 for 1 and 0.085 for 2) are smaller compared to those found for the [Mn(L)(X)3] complexes (in the range of 0.146 to 0.234); and iv) the E term increases when the ligand-field strength of the equatorial ligands decreases. 相似文献
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Rodrigo E Palacios Gerdenis Kodis Stephanie L Gould Linda de la Garza Alicia Brune Devens Gust Thomas A Moore Ana L Moore 《Chemphyschem》2005,6(11):2359-2370
An artificial photosynthetic reaction center consisting of a carotenoid (C), a dimesitylporphyrin (P), and a bis(heptafluoropropyl)porphyrin (P(F)), C-P-P(F) , and the related triad in which the central porphyrin has been metalated to give C-P(Zn)-P(F) have been synthesized and characterized by transient spectroscopy. These triads are models for amphipathic triads having a carboxylate group attached to the P(F) moiety; they are designed to carry out redox processes across lipid bilayers. Triad C-P-P(F) undergoes rapid singlet-singlet energy transfer between the porphyrin moieties, so that their excited states are in equilibrium. In benzonitrile, photoinduced electron transfer from the first excited singlet state of P and hole transfer from the first excited singlet state of P(F) yield the initial charge-separated state C-P(.) (+)-P(F) (.) (-). Subsequent hole transfer to the carotenoid moiety generates the final charge-separated state C(.) (+)-P-P(F) (.) (-), which has a lifetime of 1.1 mus and is formed with a quantum yield of 0.24. In triad C-P(Zn)-P(F) energy transfer from the P(Zn) excited singlet to the P(F) moiety yields C-P(Zn)-(1)P(F) . A series of electron-transfer reactions analogous to those observed in C-P-P(F) generates C(.) (+)-P(Zn)-P(F) (.) (-), which has a lifetime of 750 ns and is formed with a quantum yield of 0.25. Flash photolysis experiments in liposomes containing an amphipathic version of C-P(Zn)-P(F) demonstrate that the added driving force for photoinduced electron transfer in the metalated triad is useful for promoting electron transfer in the low-dielectric environment of artificial biological membranes. In argon-saturated toluene solutions of C-P-P(F) and C-P(Zn)-P(F) , charge separation is not observed and a considerable yield of triplet species is generated upon excitation of the porphyrin moieties. In both triads triplet energy localized in the P(F) moiety is channeled to the carotenoid chromophore by a triplet energy-transfer relay mechanism. Certain photophysical characteristics of these triads, including the sequential electron transfer and the triplet energy-transfer relay mechanism, are reminiscent of those observed in natural reaction centers of photosynthetic bacteria. 相似文献
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Inside Back Cover: Selective Alcohol Oxidation by a Copper TEMPO Catalyst: Mechanistic Insights by Simultaneously Coupled Operando EPR/UV‐Vis/ATR‐IR Spectroscopy (Angew. Chem. Int. Ed. 40/2015) 下载免费PDF全文
Dr. Jabor Rabeah Dr. Ursula Bentrup Prof. Dr. Reinhard Stößer Prof. Dr. Angelika Brückner 《Angewandte Chemie (International ed. in English)》2015,54(40):11875-11875