Chemistry - A European Journal最新文献_第9页

Chiral Cycloparaarylenes Incorporating Binaphthyl Units: Dramatic Effects of Peripheral Functionalization on (Chir)Optical Properties. 含联萘基的手性环对芳烯：外周功能化对（Chir）光学性质的显著影响。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-08 DOI: 10.1002/chem.71771

Kazuto Takaishi, Kotaro Nakahara, Kasumi Nishiyama, Tadashi Ema

{"title":"Chiral Cycloparaarylenes Incorporating Binaphthyl Units: Dramatic Effects of Peripheral Functionalization on (Chir)Optical Properties.","authors":"Kazuto Takaishi, Kotaro Nakahara, Kasumi Nishiyama, Tadashi Ema","doi":"10.1002/chem.71771","DOIUrl":"https://doi.org/10.1002/chem.71771","url":null,"abstract":"Axially chiral [12]cycloparaarylenes 1 and 2, consisting of three each of 1,1'-binaphthyl and biphenyl units, were synthesized. Their characteristics were distinct from those of [12]cycloparaphenylene and depended on whether the 2,2'-substituents on the binaphthyls were methoxy groups or a methylenedioxy bridge. 1 with methoxy groups adopted a D3-symmetric structure with transoid binaphthyls, whereas 2 with methylenedioxy groups existed as an equilibrium mixture of C3- and C1-symmetric structures with cisoid binaphthyls. This difference arises from modulation in binaphthyl dihedral angles and the intrinsic preference of cycloparaarylenes (CPAs) for cylindrical arene arrangements. 1 displayed strong aggregation-induced emission enhancement (AIEE) with Φfl of 0.85 at 5°C and blue emission in the solid state. 2 showed weaker but more redshifted AIEE and solid-state green emission. Trifluoroacetic acid molecules stabilized the highly symmetric conformations of 1 in the excited state, leading to a ninefold enhancement in fluorescence (FL) and intense circularly polarized luminescence (CPL) with |glum| of 0.028 and BCPL of 820 M-1 cm-1 at -60°C.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71771"},"PeriodicalIF":3.6,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149126400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using Displacement-Assisted Desorption to Identify Reactive Intermediates: Ring-Fused Porphyrins on Cu(111). 用置换辅助解吸识别反应中间体：铜上的环熔卟啉（111）。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-07 DOI: 10.1002/chem.71740

Simon Steinbach, Alisson Ceccatto, Maximilian Muth, Hans-Peter Steinrück, Ole Lytken

{"title":"Using Displacement-Assisted Desorption to Identify Reactive Intermediates: Ring-Fused Porphyrins on Cu(111).","authors":"Simon Steinbach, Alisson Ceccatto, Maximilian Muth, Hans-Peter Steinrück, Ole Lytken","doi":"10.1002/chem.71740","DOIUrl":"https://doi.org/10.1002/chem.71740","url":null,"abstract":"Because of its excellent chemical sensitivity, temperature-programmed desorption (TPD) is a widely-used method to study on-surface reactions, but it is limited to study adsorbed species that desorb before they decompose. In this study, we present a novel displacement-assisted TPD approach that displaces the adsorbed species from the monolayer into the multilayer prior to desorption, and thus allows for the detection and unambiguous identification of species that would otherwise decompose on the surface before desorption. The method employs a three-step process consisting of (i) controlled pre-annealing to initiate an on-surface reaction, (ii) deposition of a displacement agent, enabling displacement of the species in the monolayer into the multilayer and (iii) subsequent annealing to desorb the multilayer. This approach is demonstrated by investigating the temperature-dependent self-metalation and subsequent ring fusions (cyclodehydrogenation) of tetraphenyl-porphyrin (2HTPP) on Cu(111), using phenylphosphonic acid (PPA) as a displacement agent. The results reveal the quantitative conversion of CuTPP to 1-, 2-, 3-, and finally 4-fold-fused derivatives, species that otherwise would require high-resolution STM or AFM to distinguish between.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71740"},"PeriodicalIF":3.6,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149126392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modular Assembly of a Biocatalytic Material for Stereoselective C─Si Bond Formation. 立体选择性C─Si键形成生物催化材料的模块化组装。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-07 DOI: 10.1002/chem.71776

Marc F Münker, Annika J Weber, Madleen Richter, Jennifer Kühne, Carmen M Dominguez, Christof M Niemeyer, Kersten S Rabe

{"title":"Modular Assembly of a Biocatalytic Material for Stereoselective C─Si Bond Formation.","authors":"Marc F Münker, Annika J Weber, Madleen Richter, Jennifer Kühne, Carmen M Dominguez, Christof M Niemeyer, Kersten S Rabe","doi":"10.1002/chem.71776","DOIUrl":"https://doi.org/10.1002/chem.71776","url":null,"abstract":"Biocatalysis offers sustainable routes to complex molecules, yet translating enzymatic activity into robust, reusable materials remains a major challenge. Here, we report the modular assembly of a self-supporting biocatalytic material for stereoselective C─Si bond formation using an engineered Rhodothermus marinus cytochrome c (CC). The material was constructed by site-specific covalent coupling of CC fused with two SpyCatcher domains (SC-CC-SC) with streptavidin variants bearing SpyTag domains (STV-ST), yielding a red, porous enzyme foam with defined hexagonal architecture. The modular STV-mediated crosslinking strategy enables the formation of carrier-free materials with high enzyme density and minimal diffusion barriers. The CC foams retained structural integrity and catalytic activity after drying, catalyzing the formation of a chiral organosilicon compound with high enantioselectivity under mild conditions. The enzyme remains active at the extensive gas-liquid interfaces within the foam, effectively combining high catalyst loading with excellent mass transport. The resulting material retains high stereoselectivity (>95% ee), exhibits catalytic performance comparable to previously reported carrier-based immobilization approaches, and maintains catalytic activity over five consecutive reuse cycles. This immobilization concept establishes a generalizable platform for fabricating biocatalytic materials from monomeric enzymes and expands the scope of enzymatic C─Si bond formation toward scalable, sustainable synthesis.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71776"},"PeriodicalIF":3.6,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149126414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MurNAc-Based Electrophilic Inhibitors of O-Acetylpeptidoglycan Esterase (Ape): Design, Synthesis, and Kinetic Evaluation. 基于murnac的o -乙酰肽聚糖酯酶（Ape）亲电抑制剂：设计、合成和动力学评价。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-06 DOI: 10.1002/chem.71774

Dmytro Voskoboinyk, Martin E Tanner

{"title":"MurNAc-Based Electrophilic Inhibitors of O-Acetylpeptidoglycan Esterase (Ape): Design, Synthesis, and Kinetic Evaluation.","authors":"Dmytro Voskoboinyk, Martin E Tanner","doi":"10.1002/chem.71774","DOIUrl":"https://doi.org/10.1002/chem.71774","url":null,"abstract":"Peptidoglycan (PG) is the key structural component of the bacterial cell wall, responsible for cellular shape and structural integrity. Postsynthetic modifications to PG enable bacteria to evade innate immunity and regulate endogenous autolysins. Among these, C-6 O-acetylation protects PG from lysozyme degradation, while O-acetylpeptidoglycan esterase (Ape) removes this modification to restore the free C-6 hydroxyl group required for lytic transglycosylase activity. Deletion of the ape gene resulted in aberrant cell morphology and attenuated virulence, identifying Ape as a potential antibacterial target. Previously, we reported aldehyde-based competitive inhibitors (Ki = 13 µM) of Ape from Campylobacter jejuni and demonstrated that formation of a covalent hemiacetal adduct, which mimics the tetrahedral intermediate in catalysis, is critical for binding. In this work, we expanded the inhibitor series to examine the contributions of the peptide stem, the anomeric substituent, and the electrophilic carbonyl functionality to Ape inhibition. The synthesized reversible competitive inhibitors exhibited micromolar to submillimolar potency. Peptide stem extension provided little improvement in affinity, while a benzyl substituent at the anomeric position reduced inhibitory potency. Monofluorinated analogues showed modest improvements, whereas difluoroaldehyde and trifluoromethyl ketone derivatives displayed reduced affinity. Finally, irreversible covalent inhibitors bearing dimethylphosphonate and epoxide functionalities proved ineffective against Ape.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71774"},"PeriodicalIF":3.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149101593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inverse CeO₂/Cu Catalysts with Engineered Cu⁺-O_V-Ce³⁺ Interfacial Sites for Reverse Water Gas Shift Reaction. 设计Cu+-OV-Ce3+界面位的逆CeO2/Cu催化剂用于逆水煤气移位反应。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-06 DOI: 10.1002/chem.71761

Xihui Yang, Wanhui Feng, Xiujia Ma, Zihao Liu, Zijun Yang, Qingfeng Ge, Xinli Zhu

{"title":"Inverse CeO2/Cu Catalysts with Engineered Cu+-OV-Ce3+ Interfacial Sites for Reverse Water Gas Shift Reaction.","authors":"Xihui Yang, Wanhui Feng, Xiujia Ma, Zihao Liu, Zijun Yang, Qingfeng Ge, Xinli Zhu","doi":"10.1002/chem.71761","DOIUrl":"10.1002/chem.71761","url":null,"abstract":"The reverse water-gas shift (RWGS) reaction can serve as a pivotal hub for converting CO2 into value-added chemicals. However, conventional Cu/CeO2 catalysts are constrained by a limited metal-oxide interfacial perimeter, suffering from both inadequate low-temperature activity and poor stability. Herein, a series of CeO2/Cu-x catalysts (where x is the Ce/Cu molar ratio) were synthesized via an oxalic acid-assisted sol-gel coprecipitation method, and tested for RWGS at 400°C and atmospheric pressure. The optimal inverse CeO2/Cu-0.1 achieves an intrinsic reaction rate of 197.0 µmol·gcat -1·s-1, which is 3.7 times higher than that of the conventional CeO2/Cu-10 (53.1 µmol·gcat -1·s-1) and is much more stable. Structural analyses revealed that the CeO2/Cu-0.1 is characterized by an inverse architecture of tiny CeO2 crystallites (4.6 nm) on larger Cu particles (12.7 nm), which is distinct from conventional architecture of Cu clusters (3.3 nm) on larger CeO2 particles (7.1 nm) for CeO2/Cu-10. The inverse architecture significantly improves the density of Cu+-OV-Ce3+ sites at the interfacial perimeter of CeO2/Cu, which facilitates the synergistic activation of H2 and CO2 as well as subsequent reaction, leading to lower reaction orders and a much higher intrinsic rate. This work demonstrates the inverse oxide/metal architecture with engineered oxide-metal interfacial sites for enhancing RWGS.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71761"},"PeriodicalIF":3.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149101595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Getting the Big Ones to Pack: Crystal Structure of Vitamin K₂ With a Chaperone. 让大的打包：维生素K2的晶体结构与伴侣。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-06 DOI: 10.1002/chem.71741

Jan Hartenfels, Greta Lília Runge-Seither, Tim Berking, Johanna Osterbrink, Carsten Wolf, Clemens Richert

{"title":"Getting the Big Ones to Pack: Crystal Structure of Vitamin K2 With a Chaperone.","authors":"Jan Hartenfels, Greta Lília Runge-Seither, Tim Berking, Johanna Osterbrink, Carsten Wolf, Clemens Richert","doi":"10.1002/chem.71741","DOIUrl":"https://doi.org/10.1002/chem.71741","url":null,"abstract":"Packing into a crystal lattice is not easy for flexible molecules with an irregular shape, as all molecules have to adopt the same conformation in order to fit into the same position of a well-ordered lattice. When numerous conformations are populated at the crystallization temperature, crystal growth can be impaired. The larger and more flexible the analyte to be crystallized, the greater the challenge to obtain single crystals suitable for x-ray crystallography. Here we show how vitamin K2, a natural product with a rigid, bicyclic menaquinone head group and a long flexible terpenoid chain, can be crystallized. A second-generation chaperone and an optimized protocol gave co-crystals that diffract to a resolution of 0.8 Å. The chaperone employed was 1,3,5,7-tetrakis(2-fluoro-4-methoxyphenyl)adamantane (TFM). The protocol involved seeding with crystals selected from the conglomerate of an initial run, and a three-stage temperature protocol. The x-ray crystal structure shows layers of chaperones and vitamin K2 molecules, with back-folding of the terpene chains of the latter. Together with another structure showing layers of chaperone and solvent, this confirms that tetraaryladamantanes can facilitate crystallization in more ways than by just filling voids in their packing arrangements.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71741"},"PeriodicalIF":3.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149101590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Redox-Coupled Charge Transfer in an Ionic Cu(I) Coordination Polymer for Room-Temperature NO₂ and SO₂ Sensing. 离子Cu(I)配位聚合物中氧化还原耦合电荷转移的室温NO2和SO2传感。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-06 DOI: 10.1002/chem.71766

Anrudh Mishra, Vikash Kumar Verma, Dilip Pandey, L Ponvijayakanthan, Sarvesh Kumar Maurya, Neeraj K Jaiswal, Shaibal Mukherjee, Abhinav Raghuvanshi

{"title":"Redox-Coupled Charge Transfer in an Ionic Cu(I) Coordination Polymer for Room-Temperature NO2 and SO2 Sensing.","authors":"Anrudh Mishra, Vikash Kumar Verma, Dilip Pandey, L Ponvijayakanthan, Sarvesh Kumar Maurya, Neeraj K Jaiswal, Shaibal Mukherjee, Abhinav Raghuvanshi","doi":"10.1002/chem.71766","DOIUrl":"https://doi.org/10.1002/chem.71766","url":null,"abstract":"Conducting coordination polymers (CPs) have emerged as promising materials for chemiresistive gas sensing at ambient conditions. In this work, we report three ionic semiconducting Cu(I) CPs constructed from (pyridin-4-yl)-N-(4H-1,2,4-triazol-4-yl)methenamine (PTMA), oxydi(2,1-phenylene)bis(diphenylphosphine), incorporating BF4 - (CP1, C44H35BCuF4N5OP2), PF6 - (CP2, C44H35CuF6N5OP3), and ClO4 - (CP3, C44H35ClCuN5O5P2) counteranions. Among these, CP1 shows outstanding dual-gas sensing capability toward SO2 and NO2 at ambient conditions, achieving strong chemiresistive responses with excellent selectivity, fast response-recovery behavior and stable cycling performance. Comparative studies using CP2 and CP3 reveal minimal counteranion influence, indicating that the sensing response is predominantly driven by interactions at the Cu-ligand framework. Complementary experimental measurements and theoretical calculations reveal that adsorption of electron-accepting analytes perturbs the electron density on Cu(I), inducing partial oxidation of Cu(I) to Cu(II) and modulating charge transfer along the polymer backbone without disrupting structural stability, thereby accounting for the observed resistance modulation. Overall, these findings highlight the potential of Cu(I) systems as a high-efficiency platform for room-temperature dual-gas sensing.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71766"},"PeriodicalIF":3.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149101612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fe-Ca-Catalyzed Conversion of Cellulose Into Highly Ordered Graphitic Carbon Revealed by Solid-State ¹ ³C NMR and Mössbauer Spectroscopy. fe - ca催化纤维素转化为高有序石墨碳的固态13c核磁共振和Mössbauer光谱研究。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-06 DOI: 10.1002/chem.71773

Shamala Gowri Krishnan, Yannick Coppel, Jean-François Meunier, Ange Nzihou

{"title":"Fe-Ca-Catalyzed Conversion of Cellulose Into Highly Ordered Graphitic Carbon Revealed by Solid-State 1 3C NMR and Mössbauer Spectroscopy.","authors":"Shamala Gowri Krishnan, Yannick Coppel, Jean-François Meunier, Ange Nzihou","doi":"10.1002/chem.71773","DOIUrl":"https://doi.org/10.1002/chem.71773","url":null,"abstract":"An earth-abundant Fe-Ca bimetallic catalyst was developed to drive the structural transformation of renewable cellulose into highly ordered graphitic carbon. Solid-state 13C NMR T1 relaxation measurements monitored the gradual reorganization of carbon as the temperature changed. The results demonstrate a clear correlation between elevated graphitization temperatures and longer relaxation time, with the Fe-Ca-catalyzed biocarbon at 1800°C achieving a T1 value of 102.5 s, which closely approaches the 117.5 s threshold for commercial graphite. 57Fe Mössbauer spectroscopy revealed a highly coordinated sequential reduction mechanism, shifting from nanoscale superparamagnetic oxides at low temperatures (400°C-600°C) to a reactive iron carbide intermediate at 800°C. At high temperatures (1400°C-1800°C), calcium serves as a vital structural modifier that prevents Fe nanoparticle sintering, thereby maintaining high metal dispersion and enabling complete deoxygenation and advanced graphitic crystallization. Although the resulting highly reduced ferromagnetic α-Fe matrix induces a strong bulk magnetic susceptibility (BMS) effect, which complicates conventional carbon chemical-shift identification, advanced 13C T1 and Raman analyses confirm the formation of a highly ordered graphitic carbon network. This work provides profound atomic-scale insights into the valorization of bio-feedstocks into highly crystalline carbon materials suitable for energy storage applications, offering a sustainable alternative to fossil-derived graphite.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71773"},"PeriodicalIF":3.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149101583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis, Structures, and Properties of Cyclopenta-Fused Anthra[1,2-a]anthracene Derivatives as New Polycyclic Aromatic Compounds. 新型多环芳香族化合物环五-融合炭疽[1,2-a]蒽衍生物的合成、结构和性质

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-06 DOI: 10.1002/chem.71767

Moe Kobayashi, Yu Watanabe, Eiji Tsurumaki, Masahiro Yamashina, Hiroshi Ikeda, Daiki Tauchi, Masashi Hasegawa, Shinji Toyota

引用次数: 0

Self-Assembled Dansyl-Based Chiroptical L/D-Valine and L/D-Phenylalanine Conjugate for Hg(II) Detection and Catalytic Conversion of Carbon Dioxide. 自组装丹西尔基热带L/ d -缬氨酸和L/ d -苯丙氨酸偶联物用于Hg（II）检测和二氧化碳的催化转化。

IF 3.6 2区化学

Chemistry - A European Journal Pub Date : 2026-10-06 DOI: 10.1002/chem.71768

Tarkeshwar Maddeshiya, Himanshu Shekhar Tripathi, Mrituanjay D Pandey

{"title":"Self-Assembled Dansyl-Based Chiroptical L/D-Valine and L/D-Phenylalanine Conjugate for Hg(II) Detection and Catalytic Conversion of Carbon Dioxide.","authors":"Tarkeshwar Maddeshiya, Himanshu Shekhar Tripathi, Mrituanjay D Pandey","doi":"10.1002/chem.71768","DOIUrl":"https://doi.org/10.1002/chem.71768","url":null,"abstract":"Rational design and synthesis of a new class of self-assembled, dansyl-functionalized chiral conjugates derived from L/D-valine and L/D-phenylalanine are independently utilized for applications in selective Hg(II) sensing and catalytic CO2 conversion. The enantiomeric systems (1-L/D and 2-L/D) obtained via sulfonamide coupling with dansyl chloride were fully characterized by advanced spectroscopic methods and single-crystal X-ray diffraction. Circular dichroism confirms efficient transfer of chirality from the amino acid backbone to the supramolecular assemblies. At the same time, atomic force microscopy reveals distinct stereochemical control: L-forms generate nanospherical structures, while D-forms produce nanoconical morphologies. The conjugates exhibit strong dansyl-based fluorescence with highly selective turn-off responses toward Hg(II), following Stern-Volmer behavior with micromolar detection limits; Job's plot and morphology variations support metal-induced reorganization. Independently, they function as hydrogen bond donor organocatalysts for solvent-free CO2 cycloaddition to epoxides, affording up to 93% conversion under mild conditions within 6 h in the presence of n-Bu4NBr. The phenylalanine-derived system exhibits better selective sensing and catalytic efficiency, highlighting a bioinspired platform integrating chiral self-assembly, heavy-metal recognition, and sustainable CO2 utilization.","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":" ","pages":"e71768"},"PeriodicalIF":3.6,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149101656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0