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991.
Hugo Hernández-Toledo Prof. Hugo Torrens Dr. Marcos Flores-Álamo Prof. Luisa De Cola Dr. Guillermo Moreno-Alcántar 《Chemistry (Weinheim an der Bergstrasse, Germany)》2021,27(32):8308-8314
Luminescent copper(I)-based compounds have recently attracted much attention since they can reach very high emission quantum yields. Interestingly, Cu(I) clusters can also be emissive, and the extension from small molecules to larger architecture could represent the first step towards novel materials that could be obtained by programming the units to undergo self-assembly. However, for Cu(I) compounds the formation of supramolecular systems is challenging due to the coordinative diversity of copper centers. This works shows that this diversity can be exploited in the construction of responsive systems. In detail, the changes in the emissive profile of different aggregates formed in water by phosphine-thioether copper(I) derivatives were followed. Our results demonstrate that the self-assembly and disassembly of Cu(I)-based coordination polymeric nanoparticles (CPNs) is sensitive to solvent composition. The solvent-induced changes are related to modifications in the coordination sphere of copper at the molecular level, which alters not only the emission profile but also the morphology of the aggregates. Our findings are expected to inspire the construction of smart supramolecular systems based on dynamic coordinative metal centers. 相似文献
992.
de Andrade Fabrício Havy Dantas de Araújo Batista Rayanne Sales Melo Taynara Batista Lins Fernandes Felipe Hugo Alencar Macedo Rui Oliveira de Souza Fábio Santos Wanderley Almir Gonçalves 《Journal of Thermal Analysis and Calorimetry》2021,143(1):237-246
Journal of Thermal Analysis and Calorimetry - The aim of this study was to characterize and evaluate the compatibility of the dry extract (DE) of leaves of Annona muricata L. with pharmaceutical... 相似文献
993.
Hugo Krause 《Fresenius' Journal of Analytical Chemistry》1947,128(1):18-23
Ohne Zusammenfassung 相似文献
994.
Gaviria-Marin Magaly Matute-Vallejo Jorge Baier-Fuentes Hugo 《Computational & Mathematical Organization Theory》2021,27(4):414-450
Computational and Mathematical Organization Theory - Information and communication technologies (ICT) has the ability to create value by enabling other firm capabilities. Based on the ICT-enabled... 相似文献
995.
Nunes João C. F. Almeida Mafalda R. Faria Joaquim L. Silva Cláudia G. Neves Márcia C. Freire Mara G. Tavares Ana P. M. 《Journal of solution chemistry》2022,51(3):243-278
Journal of Solution Chemistry - Proteins are one the most widely studied biomolecules with diverse functions and applications. Aiming at overcoming the current drawbacks of purification processes... 相似文献
996.
Dr. Tania Neva Ana I. Carbajo-Gordillo Dr. Juan M. Benito Hugo Lana Dr. Gema Marcelo Prof. Carmen Ortiz Mellet Prof. Conchita Tros de Ilarduya Prof. Francisco Mendicuti Prof. José M. García Fernández 《Chemistry (Weinheim an der Bergstrasse, Germany)》2020,26(66):15259-15269
Original molecular vectors that ensure broad flexibility to tune the shape and surface properties of plasmid DNA (pDNA) condensates are reported herein. The prototypic design involves a cyclodextrin (CD) platform bearing a polycationic cluster at the primary face and a doubly linked aromatic module bridging two consecutive monosaccharide units at the secondary face that behaves as a topology-encoding element. Subtle differences at the molecular level then translate into disparate morphologies at the nanoscale, including rods, worms, toroids, globules, ellipsoids, and spheroids. In vitro evaluation of the transfection capabilities revealed marked selectivity differences as a function of nanocomplex morphology. Remarkably high transfection efficiencies were associated with ellipsoidal or spherical shapes with a lamellar internal arrangement of pDNA chains and CD bilayers. Computational studies support that the stability of such supramolecular edifices is directly related to the tendency of the molecular vector to form noncovalent dimers upon DNA templating. Because the stability of the dimers depends on the protonation state of the polycationic clusters, the coaggregates display pH responsiveness, which facilitates endosomal escape and timely DNA release, a key step in successful transfection. The results provide a versatile strategy for the construction of fully synthetic and perfectly monodisperse nonviral gene delivery systems uniquely suited for optimization schemes. 相似文献
997.
Ryusei Oketani Francesco Marin Dr. Paul Tinnemans Marine Hoquante Anne Laurent Dr. Clément Brandel Prof. Dr. Pascal Cardinael Dr. Hugo Meekes Prof. Dr. Elias Vlieg Prof. Dr. Yves Geerts Prof. Dr. Gérard Coquerel 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(61):13890-13898
A productive deracemization process based on a quaternary phase diagram study of a naphthamide derivative is reported. New racemic compounds of an atropisomeric naphthamide derivative have been discovered, and a quaternary phase diagram has been constructed that indicated that four solids are stable in a methanol/H2O solution. Based on the results of a heterogeneous equilibria study showing the stable domain of the conglomerate, a second-order asymmetric transformation was achieved with up to 97 % ee. Furthermore, this methodology showcases the chiral separation of a stable racemic compound forming system and does not suffer from any of the typical limitations of deracemization, although application is still limited to conglomerate-forming systems. We anticipate that this present study will serve as a fundamental model for the design of sophisticated chiral separation processes. 相似文献
998.
Santos Hugo L. S. Corradini Patricia G. Andrade Marcos A. S. Mascaro Lucia Helena 《Journal of Solid State Electrochemistry》2020,24(8):1899-1908
Journal of Solid State Electrochemistry - Copper oxides are considered to be very promising materials for promoting a hydrogen evolution reaction (HER). However, some CuO features, such as the... 相似文献
999.
Science China Mathematics - The main purpose of this paper is to extend the result obtained by Beirão da Veiga (2000) from the whole-space case to slip boundary cases. Denote by ū two... 相似文献
1000.
Pessia Gilinsky‐Sharon Hugo E. Gottlieb David E. Rajsfus Keren Keinan‐Adamsky Vered Marks Pinchas Aped Aryeh A. Frimer 《Magnetic resonance in chemistry : MRC》2012,50(10):672-679
The nitration of tetraiodoethylene (7) yields 1,1‐diiodo‐2,2‐dinitroethylene (8). The latter reacts with alkylamines 9 or alkyldiamines 11 to give the corresponding acyclic 1,1‐diamino‐2,2‐dinitroethylenes 10 or their cyclic analogs 12, respectively. On the basis of liquid and solid‐state 13C and 15N NMR data, x‐ray analysis and ab initio calculations, we suggest that the title compounds are always zwitterionic and that the CA–CN bond is not a true double bond. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献