Search Results - "Quiñoá, Emilio"

Merging Supramolecular and Covalent Helical Polymers: Four Helices Within a Single Scaffold by Fernández, Zulema, Fernández, Berta, Quiñoá, Emilio, Freire, Félix

“…Supramolecular and covalent polymers share multiple structural effects such as chiral amplification, helical inversion, sergeants and soldiers, or majority…”
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Sequential Induction of Chirality in Helical Polymers: From the Stereocenter to the Achiral Solvent by Nieto-Ortega, Belén, Rodríguez, Rafael, Medina, Samara, Quiñoá, Emilio, Riguera, Ricardo, Casado, Juan, Freire, Félix, Ramírez, Francisco Javier

“…Several steps of chiral induction have been detected in poly­(phenylacetylene)­s among their different hierarchical levels of chirality by vibrational circular…”
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Helical Colorimetric Sensors: Stimuli‐Directed Colorimetric Interconversion of Helical Polymers Accompanied by a Tunable Self‐Assembly Process (Small 13/2019) by Rodríguez, Rafael, Quiñoá, Emilio, Riguera, Ricardo, Freire, Félix

“…The image is an artistic depiction of the two structural states (helical and elongated) achieved by manipulation at the pendant groups of the…”
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Determining the Absolute Stereochemistry of Secondary/Secondary Diols by 1H NMR:  Basis and Applications by Freire, Félix, Seco, José Manuel, Quiñoá, Emilio, Riguera, Ricardo

“…The absolute configuration of 1,2-, 1,3-, 1,4-, and 1,5-diols formed by two secondary (chiral) hydroxy groups can be deduced by comparison of the NMR spectra…”
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Supramolecular Assemblies from Poly(phenylacetylene)s by Freire, Félix, Quiñoá, Emilio, Riguera, Ricardo

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Three-State Switchable Chiral Stationary Phase Based on Helicity Control of an Optically Active Poly(phenylacetylene) Derivative by Using Metal Cations in the Solid State by Hirose, Daisuke, Isobe, Asahi, Quiñoá, Emilio, Freire, Félix, Maeda, Katsuhiro

“…An unprecedented three-state switchable chiral stationary phase (CSP) for high-performance liquid chromatography (HPLC) was developed using a helical…”
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A practical guide for the assignment of the absolute configuration of alcohols, amines and carboxylic acids by NMR by Seco, José Manuel, Quiñoá, Emilio, Riguera, Ricardo

“…A practical guide for the assignment of the absolute configuration of alcohols, amines and carboxylic acids by NMR is presented. The guide includes information…”
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Chiral-to-Chiral Communication in Polymers: A Unique Approach To Control Both Helical Sense and Chirality at the Periphery by Cobos, Katherine, Quiñoá, Emilio, Riguera, Ricardo, Freire, Félix

“…A novel approach to the classical Sergeants and Soldiers effect, using chiral Sergeants and chiral Soldiers, allows control over both helical and external…”
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Architecture of Chiral Poly(phenylacetylene)s: From Compressed/Highly Dynamic to Stretched/Quasi-Static Helices by Rodríguez, Rafael, Quiñoá, Emilio, Riguera, Ricardo, Freire, Félix

“…The remarkable consequences in elongation, dynamic character, response to external stimuli (e.g., solvent effects, metal cations), and aggregation observed in…”
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Multistate Chiroptical Switch Triggered by Stimuli-Responsive Chiral Teleinduction by Rodríguez, Rafael, Quiñoá, Emilio, Riguera, Ricardo, Freire, Félix

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The Competitive Aggregation Pathway of an Asymmetric Chiral Oligo(p‐phenyleneethynylene) Towards the Formation of Individual P and M Supramolecular Helical Polymers by Fernández, Zulema, Fernández, Berta, Quiñoá, Emilio, Freire, Félix

“…A complex aggregation pathway towards two diastereomeric P and M supramolecular helices arises from the aggregation of a short, chiral, and rigid…”
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Chiral Coalition in Helical Sense Enhancement of Copolymers: The Role of the Absolute Configuration of Comonomers by Arias, Sandra, Rodríguez, Rafael, Quiñoá, Emilio, Riguera, Ricardo, Freire, Félix

“…Both the role of the absolute configuration and the tendency of a chiral monomer to promote a certain helical scaffold in a poly­(phenyl­acetylene) (PPA) have…”
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Polymeric Helical Structures à la Carte by Rational Design of Monomers by Cobos, Katherine, Rodríguez, Rafael, Domarco, Olaya, Fernández, Berta, Quiñoá, Emilio, Riguera, Ricardo, Freire, Félix

“…Preparation of helical structures à la carte by monomer design of dynamic helical polymers such as poly­(phenylacetylene)­s (PPAs) is a difficult task due to…”
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From Sergeants and Soldiers to Chiral Conflict Effects in Helical Polymers by Acting on the Conformational Composition of the Comonomers by Cobos, Katherine, Rodríguez, Rafael, Quiñoá, Emilio, Riguera, Ricardo, Freire, Félix

“…Different communication mechanisms can be switched within a copolymer by acting on the conformational composition of the components and their chirality. Thus,…”
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Poly(phenylacetylene) Amines: A General Route to Water-Soluble Helical Polyamines by Suárez-Picado, Esteban, Quiñoá, Emilio, Riguera, Ricardo, Freire, Félix

“…Poly­(phenylacetylene)­s bearing prim- and sec-amine groups are barely known because of their poisoning activity toward the polymerization catalyst. Herein, we…”
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Dynamic Chiral PPA–AgNP Nanocomposites: Aligned Silver Nanoparticles Decorating Helical Polymers by Núñez-Martínez, Manuel, Arias, Sandra, Quiñoá, Emilio, Riguera, Ricardo, Freire, Félix

“…A novel approach to prepare stimulus-sensitive nanocomposites is described, based on a dynamic helical polymer, chiral poly­(phenylacetylene) (PPA), and silver…”
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Screw sense excess and reversals of helical polymers in solution by Rey-Tarrío, Francisco, Rodríguez, Rafael, Quiñoá, Emilio, Freire, Félix

“…The helix reversal is a structural motif found in helical polymers in the solid state, but whose existence is elusive in solution. Herein, we have shown how…”
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Stereocomplex Nanocomposite Switch Based on Dynamic Helical Polymer-Gold and Silver Nanoparticle Hybrid Materials by Núñez-Martínez, Manuel, Quiñoá, Emilio, Freire, Félix

“…Controlled ON/OFF stereocomplexation of dynamic helical polymer-metal nanoparticle nanocompositespoly­(phenylacetylene)-MNP nanocomposites (M = Au or Ag)is…”
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Chiral Amplification and Helical-Sense Tuning by Mono- and Divalent Metals on Dynamic Helical Polymers by Freire, Félix, Seco, José Manuel, Quiñoá, Emilio, Riguera, Ricardo

“…Ion sensor: A highly dynamic poly(phenylacetylene) bearing α‐methoxyphenylacetic acid (MPA) as chiral pendant exhibits selective helix induction and chiral…”
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Chiral Conflict as a Method to Create Stimuli‐Responsive Materials Based on Dynamic Helical Polymers by Alzubi, Mohammad, Arias, Sandra, Rodríguez, Rafael, Quiñoá, Emilio, Riguera, Ricardo, Freire, Félix

“…A new multi‐sensor material based on helical copolymers showing the chiral conflict effect have been prepared. It can successfully detect and identify diverse…”
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