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101.
Nikolaos Klouras Ioannis Demakopoulos Aris Terzis Caterina P. Raptopoulou 《无机化学与普通化学杂志》1995,621(1):113-116
The crystal and molecular structure of Ti(n5-C5H4CH3)2S5has been determined by X-ray diffraction studies. The substance crystallizes in the monoclinic crystal system [a = 6.8642(5), b = 16.507(1), c = 13.074(1) Å, β = 82.407(3)°, space group P21/n, Z = 4]. The geometry about the titanium atom is a distorted tetrahedron, with a (centroid)-Ti-(centroid) angle of 131.29° and a S? Ti? S angle of 93.38°. The six-membered ring TiS5 has a cyclohexane-like chair configuration. The structural results are compared to those for similar type titanium complexes. 相似文献
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105.
The mathematical basis for the Ruedenberg's and Mulliken's approximations is given in a general framework. 相似文献
106.
Clelia Dispenza Maurizio Leone Caterina Lo Presti Fabio Librizzi Valeria Vetri Giuseppe Spadaro 《Macromolecular Symposia》2007,247(1):303-310
Nanocomposites of inherently conductive polyaniline (PANI) within a highly hydrophilic polyvinyl alcohol (PVA) based hydrogel have been produced by coupling a conventional dispersion chemical oxidative polymerization to a subsequent high energy irradiation step, in order to convert the polymer stabilizing the aqueous dispersion, namely the PVA, into a highly water swollen hydrogel incorporating the PANI particles. The incorporation of the electroactive and “pH-sensitive” polymer into a transparent and highly permeable hydrogel matrix has been pursued as a route to the development of a novel class of potentially biocompatible, smart hydrogels that can respond to changes of the surrounding environment with measurable changes in their optical properties. Absorption spectra show that the optical absorption bands typical of PANI, known to be reversibly affected by changes of the polymer oxidation state or pH or both, are well preserved in the PVA hydrogels. Even more interestingly, fluorescence is observed from the nanoparticles of PANI in its inherently conductive form, whose intensity is strongly affected by changes of pH. This has enhanced the importance of this material to a large extent from both a scientific and a practical point of view. 相似文献
107.
Caterina Brandmayr Mirko Wagner Tobias Brückl Daniel Globisch David Pearson Andrea Christa Kneuttinger Veronika Reiter Antje Hienzsch Susanne Koch Ines Thoma Peter Thumbs Stylianos Michalakis Markus Müller Martin Biel Thomas Carell 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2012,124(44):11324-11328
108.
M. Chem. Caterina Brandmayr Dipl.‐Chem. Mirko Wagner Dr. Tobias Brückl Dr. Daniel Globisch Dr. David Pearson M. Sc. Andrea Christa Kneuttinger Dipl.‐Chem. Veronika Reiter Dr. Antje Hienzsch Dipl.‐Biol. Susanne Koch M. Sc. Ines Thoma Dipl.‐Chem. Peter Thumbs Dr. Stylianos Michalakis Dr. Markus Müller Prof. Dr. Martin Biel Prof. Dr. Thomas Carell 《Angewandte Chemie (International ed. in English)》2012,51(44):11162-11165
109.
Giuseppe Bellussi Angela Carati Stefania Guidetti Caterina Rizzo Roberto Millini Stefano Zanardi Erica Montanari Wallace O’Neil Parker Jr. Michela Bellettato 《催化学报》2015,(6):813-819
Phenylene-gallosilicates were prepared with the same crystalline structure as their aluminum ana-logues. The new Ga-Eni Carbon Silicates (Ga-ECS) phases were investigated by X-ray diffraction, scanning electron microscopy, nuclear magnetic resonance and thermogravimetric analysis, which demonstrated that gallium isomorphously replaced aluminum in the framework of the organ-ic-inorganic hybrids similar to the case of classical zeolites. Hybrid ECS materials were obtained with different types of bridged silsesquioxane precursors that maintained the aluminum-silicate nature of the inorganic moiety. This work confirms a new level of crystal chemistry versatility for this class of materials, and demonstrates the possibility to tailor also the inorganic part of the framework by changing the nature of the trivalent heteroatom. 相似文献
110.
Dr. Amanda K. Chaplin Dr. Caterina Bernini Dr. Adalgisa Sinicropi Prof. Riccardo Basosi Dr. Jonathan A. R. Worrall Dr. Dimitri A. Svistunenko 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2017,129(23):6602-6606
The concerted redox action of a metal ion and an organic cofactor is a unique way to maximize the catalytic power of an enzyme. An example of such synergy is the fungal galactose 6-oxidase, which has inspired the creation of biomimetic copper oxidation catalysts. Galactose 6-oxidase and its bacterial homologue, GlxA, possess a metalloradical catalytic site that contains a free radical on a covalently linked Cys–Tyr and a copper atom. Such a catalytic site enables for the two-electron oxidation of alcohols to aldehydes. When the ability to form the Cys–Tyr in GlxA is disrupted, a radical can still be formed. Surprisingly, the radical species is not the Tyr residue but rather a copper second-coordination sphere Trp residue. This is demonstrated through the introduction of a new algorithm for Trp-radical EPR spectra simulation. Our findings suggest a new mechanism of free-radical transfer between aromatic residues and that the Cys–Tyr cross-link prevents radical migration away from the catalytic site. 相似文献