Search

Your search keyword '"Han, Yuan"' showing total 15 results
Start Over Author "Han, Yuan" Journal chemical communications
15 results on '"Han, Yuan"'

1. Thermally activated isomeric all-hydrocarbon molecular receptors for fullerene separation

Author

Yu-Dong Yang and Han-Yuan Gong

Subjects
chemistry.chemical_classification, Fullerene, 010405 organic chemistry, Metals and Alloys, General Chemistry, 010402 general chemistry, 01 natural sciences, Catalysis, Symmetry (physics), 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, Crystallography, Hydrocarbon, chemistry, Materials Chemistry, Ceramics and Composites, Benzene, Receptor, Conformational isomerism
Abstract

A new all-hydrocarbon macrocycle, cyclo[8](1,3-(4,6-dimethyl)benzene) (CDMB-8) has been reported. As prepared, it exists in Cs symmetry and shows no interaction with fullerenes (e.g., C60 or C70). High temperature (573 K) treatment induces thermal conversion of the material to an isomeric conformer with D4d symmetry as a receptor for fullerene separation.

Published
2019
Full Text
View/download PDF

2. Discrete 1 : 1 complexes and higher order assemblies formed from aminobenzene sulphonate anions and a tetraimidazolium 'molecular box'

Author

Brett M. Rambo, Jonathan L. Sessler, Junfeng Xiang, Han-Yuan Gong, Lei Zhang, Li Zhou, and Cai-Ling Wang

Subjects
010405 organic chemistry, Chemistry, Metals and Alloys, Supramolecular chemistry, Protonation, macromolecular substances, General Chemistry, 010402 general chemistry, 01 natural sciences, Catalysis, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Order (biology), Polymer chemistry, Materials Chemistry, Ceramics and Composites, Organic chemistry, Volume concentration
Abstract

Use of isomeric aminobenzene sulphonate anions in conjunction with a tetraimidazolium "molecular box" leads to self-assembled embedded structures. Simple 1 : 1 complexes are formed at low concentrations in DMSO when the host : guest ratio is 1.0. Higher order species are seen as the concentration is increased or the host-guest ratio is perturbed. The assembly and disassembly of the supramolecular aggregates can be controlled by application of various external stimuli, including changes in concentration, temperature, and protonation state of the guest species.

Published
2017
Full Text
View/download PDF

3. Aromatic sulfonate anion-induced pseudorotaxanes: environmentally benign synthesis, selectivity, and structural characterization

Author

Feng Tang, Junfeng Xiang, Jonathan L. Sessler, Rui Cao, Brett M. Rambo, and Han Yuan Gong

Subjects
Aqueous solution, Metals and Alloys, General Chemistry, Mechanically interlocked molecular architectures, Organic media, Combinatorial chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Ion, chemistry.chemical_compound, Sulfonate, chemistry, Materials Chemistry, Ceramics and Composites, Organic chemistry, Selectivity
Abstract

Anion-induced molecular threading is an emerging strategy for generating mechanically interlocked molecular architectures. Herein, we report the preparation of two pseudorotaxane structures generated from aromatic sulfonate anions and a tetraimidazolium-containing macrocycle in organic media, as well as under environmentally benign aqueous conditions.

Published
2015
Full Text
View/download PDF

9. Correction: Aromatic sulfonate anion-induced pseudorotaxanes: environmentally benign synthesis, selectivity, and structural characterization

Author

Han-Yuan Gong, Feng Tang, Brett M. Rambo, Rui Cao, Jun-Feng Xiang, and Jonathan L. Sessler

Subjects
Materials Chemistry, Metals and Alloys, Ceramics and Composites, General Chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Abstract

Correction for ‘Aromatic sulfonate anion-induced pseudorotaxanes: environmentally benign synthesis, selectivity, and structural characterization’ by Han-Yuan Gong et al., Chem. Commun., 2015, DOI: 10.1039/c4cc08284b.

Published
2015
Full Text
View/download PDF

10. Enzyme-triggered hydrogelation via self-assembly of alternating peptides

Author

Jiali Cai, Richard A. Gross, Zheng Yu, Xu Qin, Glenn L. Butterfoss, Wenchun Xie, Anne C. Khuong, Han Yuan, and Sai Tian

Subjects
Circular dichroism, Stereochemistry, Microscopy, Atomic Force, Catalysis, chemistry.chemical_compound, Papain, Materials Chemistry, Chymotrypsin, chemistry.chemical_classification, Dipeptide, Aqueous medium, Hydrogen bond, Circular Dichroism, Intermolecular force, Metals and Alloys, General Chemistry, Combinatorial chemistry, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Enzyme, chemistry, Ceramics and Composites, Self-assembly, Oligopeptides, Peptide Hydrolases
Abstract

α-Chymotrypsin catalyzed oligomerization of the "dipeptide lego" KL-ethyl ester (OEt) in aqueous media triggers a rapid sol-gel transition due to formation of alternating (KL)x. Resulting mixed chain oligomers, at alkaline pH, self-assemble into β-sheets. Thereafter, intermolecular backbone hydrogen bonding between peptides causes formation of physically entangled nanofibrillar networks.

Published
2013
Full Text
View/download PDF

13. Anion-directed assembly of a three-dimensional metal–organic rotaxane framework

Author

Han Yuan Gong, Won Cho, Moonhyun Oh, Vincent M. Lynch, Jonathan L. Sessler, and Brett M. Rambo

Subjects
Rotaxane, Chemistry, Metals and Alloys, General Chemistry, Photochemistry, Combinatorial chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Ion, Metal, chemistry.chemical_compound, visual_art, Materials Chemistry, Ceramics and Composites, visual_art.visual_art_medium, Naphthalene
Abstract

A three-dimensional extended, metal-organic rotaxane framework (MORF) that incorporates encircled "struts" has been synthesized through a one-pot self-assembly process involving a macrocyclic tetraimidazolium "molecular box", naphthalene dicaboxylate dianion, and Zn(II) cations. The present system represents progress towards controlling the features of three-dimensional metal-organic frameworks.

Published
2011
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results