Controlling Glycan Folding with Ionic Functional Groups DOI Creative Commons

Nishu Yadav,

Ana Poveda,

Yadiel Vázquez Mena

и другие.

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Glycans are intrinsically flexible molecules that can adopt many conformations. These often carry ionic functional groups influence glycan's conformational preferences, dynamics, and aggregation tendencies. Inspired by these mechanisms, we have engineered a glycan sequence whose secondary structure be precisely manipulated using groups. We strategically incorporated substituents into adopting hairpin conformation. Complementary stabilized the closed conformers, while repulsions shifted populations toward open forms. External stimuli, such as pH variations or enzyme addition, enabled us to dynamically control hairpin's opening closing. Additionally, changes in protonation states led aggregation, suggesting opportunities for creation of responsive glycan-based materials.

Язык: Английский

Compressible Hydrogels with Stabilized Chirality from Thermoresponsive Helical Dendronized Poly(phenylacetylene)s DOI

Lefei Shen,

Yuexin Cao,

Lei Wang

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(34)

Опубликована: Май 21, 2024

Fabrication of chiral hydrogels from thermoresponsive helical dendronized phenylacetylene copolymers (PPAs) carrying three-fold dendritic oligoethylene glycols (OEGs) is reported. Three different temperatures, i.e. below or above cloud point temperatures (T

Язык: Английский

Процитировано

5

Synthetic helical polymers: An overview on synthesis and their chiral separation efficiency DOI

Baisakhi Tilottama,

Kari Vijayakrishna

European Polymer Journal, Год журнала: 2024, Номер 213, С. 113071 - 113071

Опубликована: Апрель 28, 2024

Язык: Английский

Процитировано

4

Fluorescence-Selective Absorption and Circularly Polarized Fluorescence Energy Transfer Assist the Generation of Multicolor Circularly Polarized Luminescence in Chiral Helical Polyacetylene-Based Janus Nanofibers DOI
Yujie Ji, Kai Yang, Biao Zhao

и другие.

ACS Macro Letters, Год журнала: 2024, Номер 13(6), С. 673 - 680

Опубликована: Май 16, 2024

Chiroptical nanomaterials with circularly polarized luminescence (CPL) performance have aroused increasing attention. Herein, multicolor CPL-active Janus nanofibers are prepared through a simple parallel electrospinning method using chiral helical polyacetylenes as the source and achiral fluorophores fluorescent source. Interestingly, despite direct spatial isolation between component component, blue green CPL emissions can still be obtained due to fluorescence-selective absorption behavior of polyacetylenes, satisfactory dissymmetric factor (glum) 2 × 10-2 2.5 10-3, respectively. Moreover, by taking advantage circular polarization fluorescence energy transfer process, red emission is further achieved donors fluorophore an acceptor. The present work offers facile approach prepare multilevel-structured chiroptical materials promising application potentials in flexible photoelectric device.

Язык: Английский

Процитировано

4

Sergeant‐and‐Soldier Effect in an Organic Room‐Temperature Phosphorescent Host‐Guest System DOI

Anthony W. K. Law,

Tsz Shing Cheung, Jianyu Zhang

и другие.

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 17, 2024

Abstract Host‐guest systems have emerged as an efficient strategy for promoting organic room temperature phosphorescence (RTP). Despite the advantages of doping guest molecules into a host matrix, complexity these and lack techniques to visualize host‐guest interactions at molecular scale pose significant challenges in understanding underlying mechanisms. Here, novel RTP system is developed by incorporating low concentrations (1–10 mol%) TPP‐4C‐BI (guest) crystalline TPP‐4C‐Cz (host). Utilizing structural isomerism, are regularly incorporated crystal lattice, resulting quantum yields almost ten times higher than pure compounds. The enabled resolution packing single through X‐ray diffraction, providing unprecedented visualization interactions. A “sergeant‐and‐soldier” effect, where minority dopant (sergeants) significantly influence arrangement (soldiers), enhances identified. Further analyses revealed that due molecule's inefficient pathway, its long‐lived dark triplets channeled via triplet‐triplet energy transfer (TTET), allowing excited radiatively decay more efficiently. These insights advance mechanisms offer practical implications designing high‐efficiency phosphorescent materials.

Язык: Английский

Процитировано

4

One‐Handed Covalent Helical Ladder Polymers: The Dawn of a Tailorable Class of Chiral Functional Materials DOI
Giovanni Preda, Dario Pasini

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(35)

Опубликована: Май 31, 2024

In the last decades, chemists have developed methods to synthesize helical molecular architectures using a combination of covalent and non-covalent interactions. Very recently, new class completely covalent, one-handed ladder polymers has vigorously emerged. Such can be rationally programmably obtained through an approach guided by principles chirality-assisted-synthesis (CAS) making use synergically two disciplines that so far rarely interacted: non-planar chiral π-conjugated synthons polymer chemistry. The precise programmability 3D structure mechanical chiroptical properties will lead potential applications in areas such as enantiorecognition, catalysis, spintronics chiral-related optoelectronics. This minireview examines emerging field polymers, analyzing their synthesis, applications, limitations.

Язык: Английский

Процитировано

3

Odd–even effect in chiral side-chain cyanobiphenyl block copolymer assemblies prepared by polymerization-induced chiral self-assembly DOI
Jiaying Guo,

Zeyu Tang,

Hongbin Dai

и другие.

Nanoscale, Год журнала: 2024, Номер 16(30), С. 14269 - 14274

Опубликована: Янв. 1, 2024

The precise control of the chirality polymer assemblies is a challenge faced by scientists and has received significant attention in recent years. In this study, we employed polymerization-induced chiral self-assembly (PICSA) method to create side-chain cyanobiphenyl (CB) block copolymer (BCP) assemblies. flexible spacers CB monomers were regulated exhibit two distinct odd-even effects supramolecular asymmetrical arrangement mesogens inside BCP research results indicated that liquid crystalline properties significantly influence magnitude sign their chiroptical properties. These findings have implications for design with designable functions.

Язык: Английский

Процитировано

3

Thermoresponsive helical dendronized poly(arylacetylene)s: modulating the dynamic chirality DOI
Xueting Lu, Lei Wang, Liangxuan Ren

и другие.

Science China Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 2, 2025

Язык: Английский

Процитировано

0

Photo‐Controllable Förster Resonance Energy Transfer Based on Dynamic Chiral Self‐Assembly of Sequence‐Defined Amphiphilic Alternating Azopeptoids DOI Open Access
Haibao Jin, Fan Liu,

Pengchao Wu

и другие.

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 8, 2025

Abstract Endowing biomimetic sequence–controlled polymers with chiral functionality to construct stimuli‐responsive materials offers a promising approach for innovative chiroptical switch, but it remains challenging. Herein, is reported that the self‐assembly of sequence‐defined amphiphilic alternating azopeptoids generate photo‐responsive and ultrathin bilayer peptoidosomes vesicular thickness ≈1.50 nm diameter around ≈290 nm. The photoisomerization azobenzene moiety facilitates reversible structural transformation from isotropic anisotropic 1D helical nanoribbons (≈80 width) under irradiation UV visible lights, consequently leading chirality expression transfer asymmetric center achiral units. As model deformation‐induced energy transfer, non‐invasive azobenzene‐based Förster resonance system unprecedentedly constructed via introduction fluorescent donor pyrene derivatives sequentially photo‐regulated donor/acceptor ratio, displaying gradient color variation blue yellow (a broad Stokes shift ≈200 nm) high‐efficient efficiency 97.2%. photo‐controllable photoluminescence phenomenon endows these aggregates proof‐of‐concept application on multi‐colored information encryption. This work provides prospective strategy fabricate potential light‐controllable switches.

Язык: Английский

Процитировано

0

Helical Polymer‐Containing Bottlebrush Polymers (BBPs): Design, Synthesis, and Perspectives DOI Open Access
Hui Zou,

Shiqi Wang,

C. D. Han

и другие.

Macromolecular Rapid Communications, Год журнала: 2025, Номер unknown

Опубликована: Фев. 6, 2025

Abstract Helical polymer‐containing bottlebrush polymers (BBPs) are a special and fascinating type of polymer. They possess topology contain helical as main chains (MCs) or side (SCs), thereby presenting interesting fantastic properties, such chiral amplification, circularly polarized luminescence, photonic crystal, so on. This review mainly focuses on BBPs containing polypeptides, polyacetylenes (PAs), polyisocyanides (PIs). Detailed summarizations severally given to with polypeptides MCs SCs. Meanwhile, comprising PAs fully discussed. What's more, consisted PIs SCs described separately. In addition, other briefly introduced, too. The authors hope this will motivate more interest in developing complex topologies encourage further progress functional materials.

Язык: Английский

Процитировано

0

“Sergeants-and-soldiers” effect and modified Ising model in chiral polymer materials DOI
Liyuan Shi,

Fu Tian,

Sheng Wang

и другие.

Science China Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Фев. 8, 2025

Язык: Английский

Процитировано

0