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51.
Cover Picture: Platinum trans‐Bis(borirene) Complexes Displaying Coplanarity and Communication Across a Platinum Metal Center (Chem. Eur. J. 6/2015)
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Dr. Tao Wei Malte Kohring Dr. Muqing Chen Prof. Dr. Shangfeng Yang Prof. Dr. Heiko B. Weber Dr. Frank Hauke Prof. Dr. Andreas Hirsch 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(14):5651-5655
Patterned graphene-functionalization with a tunable degree of functionalization can tailor the properties of graphene. Here, we present a new reductive functionalization approach combined with lithography rendering patterned graphene-functionalization easily accessible. Two types of covalent patterning of graphene were prepared and their structures were unambiguously characterized by statistical Raman spectroscopy together with scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM-EDS). The reversible defunctionalization processes, as revealed by temperature-dependent Raman spectroscopy, enable the possibility to accurately modulate the degree of functionalization by annealing. This allows for the management of chemical information through complete write/store/erase cycles. Based on our strategy, controllable and efficient patterning graphene-functionalization is no longer a challenge and facilitates the development of graphene-based devices. 相似文献
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Hauke F Vostrowsky O Hirsch A Quaranta A Leibl W Leach S Edge R Navaratnam S Bensasson RV 《Chemistry (Weinheim an der Bergstrasse, Germany)》2006,12(18):4813-4820
We have synthesised nine monomeric azaheterofullerene (AZA) derivatives, RC(59)N, with a wide variety of different side chains R and investigated their spectroscopic and photophysical properties in toluene and o-dichlorobenzene (ODCB). Measurements include their ground-state absorption spectra, molar absorption coefficient (epsilon(G)), fluorescence spectra, fluorescence quantum yields (Phi(F)), singlet-state lifetimes (tau(F)), triplet-state absorption spectra, triplet molar absorption coefficients (epsilon(T)), singlet oxygen (Phi(Delta)), and triplet state (Phi(T)) quantum yields. The replacement of a carbon by a nitrogen atom in the C(60) sphere strongly affects most of the spectroscopic and photophysical properties. The chemical nature of the R moiety has definite effects on these properties in contrast with minor effects on the chemical nature of the addends in [6,6]-ring bridged monoadduct methano[60]fullerene derivatives. These effects concern properties of the ground state, singlet excited state, and triplet states of our nine RC(59)N derivatives and in particular the values of photophysical parameters epsilon(G), epsilon(T), Phi(Delta), and Phi(T), which are significantly lower than those of analogous monoadduct [6,6]-ring bridged methano[60]fullerene derivatives. 相似文献
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We study a periodic one-dimensional exclusion process composed of a driven and a diffusive part. In a mesoscopic limit where both dynamics compete we identify bulk-driven phase transitions. We employ mean-field theory complemented by Monte Carlo simulations to characterize the emerging nonequilibrium steady states. Monte Carlo simulations reveal interesting correlation effects that we explain phenomenologically. 相似文献
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Englert JM Hauke F Feng X Müllen K Hirsch A 《Chemical communications (Cambridge, England)》2010,46(48):9194-9196
Unsubstituted hexa-peri-hexabenzocoronene (HBC)-a small and well defined model system for graphite/graphene-was exfoliated and dissolved in water and the resulting individualized nano graphene sheets were characterized spectroscopically for the first time. 相似文献
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Karthikeyan Annamalai Falk Liberta Marie-Theres Vielberg William Close Prof. Dr. Hauke Lilie Dr. Karl-Heinz Gührs Dr. Angelika Schierhorn Dr. Rolf Koehler Andreas Schmidt Dr. Christian Haupt Dr. Ute Hegenbart Dr. Stefan Schönland Dr. Matthias Schmidt Prof. Dr. Michael Groll Prof. Dr. Marcus Fändrich 《Angewandte Chemie (International ed. in English)》2017,56(26):7510-7514
Systemic amyloidosis is caused by the misfolding of a circulating amyloid precursor protein and the deposition of amyloid fibrils in multiple organs. Chemical and biophysical analysis of amyloid fibrils from human AL and murine AA amyloidosis reveal the same fibril morphologies in different tissues or organs of one patient or diseased animal. The observed structural similarities concerned the fibril morphology, the fibril protein primary and secondary structures, the presence of post-translational modifications and, in case of the AL fibrils, the partially folded characteristics of the polypeptide chain within the fibril. Our data imply for both analyzed forms of amyloidosis that the pathways of protein misfolding are systemically conserved; that is, they follow the same rules irrespective of where inside one body fibrils are formed or accumulated. 相似文献