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Nonuniform Chiralization of Metal-Organic Frameworks Using Imine Chemistry. 用亚胺化学研究金属-有机骨架的不均匀手性。
IF 5.7
ACS Materials Au Pub Date : 2025-02-04 eCollection Date: 2025-05-14 DOI: 10.1021/acsmaterialsau.4c00139
Balázs Álmos Novotny, Sauradeep Majumdar, Andres Ortega-Guerrero, Kevin Maik Jablonka, Elias Moubarak, Natalia Gasilova, Nency P Domingues, Raluca-Ana Kessler, Emad Oveisi, Fatmah Mish Ebrahim, Berend Smit
{"title":"Nonuniform Chiralization of Metal-Organic Frameworks Using Imine Chemistry.","authors":"Balázs Álmos Novotny, Sauradeep Majumdar, Andres Ortega-Guerrero, Kevin Maik Jablonka, Elias Moubarak, Natalia Gasilova, Nency P Domingues, Raluca-Ana Kessler, Emad Oveisi, Fatmah Mish Ebrahim, Berend Smit","doi":"10.1021/acsmaterialsau.4c00139","DOIUrl":"10.1021/acsmaterialsau.4c00139","url":null,"abstract":"<p><p>Homochiral metal-organic frameworks (MOFs) are exceptional media for heterogeneous enantiodifferentiation processes. Modifying available achiral structure-bearing MOF scaffolds is a preferred method to extend this class of materials. Reported postsynthetic covalent chiralizations generally lead to uniform, site-specific modifications. The use of chemically versatile modifying agents, like aldehydes, may instead result in the statistical formation of chemically nonuniform anchored products. In addition, the use of such modifying agents gives rise to spatial nonuniformities in the radial direction, due to prohibited diffusion through the MOF bulk. The advantageous grain structure formation plus molecular nonuniformity greatly increase the complexity of such systems. The use of such modifying agents, therefore, necessitates a broader holistic characterization. The present work explores the adaptation of imine chemistry for postsynthetic chiralization. A chiral aldehyde and a chiral ketone are probed on two amine-functionalized MOF substrates-MIL-125 NH<sub>2</sub> and UiO-66 NH<sub>2</sub>. The UiO-66 NH<sub>2</sub> modified with the natural product-derived (<i>R</i>)-2,2-dimethyl-1,3-dioxolane-4-carboxaldehyde ((<i>R</i>)-<b>1</b> aldehyde) is found to have the best performance in terms of reactivity and MOF stability. A comprehensive toolbox of methods was demonstrated to robustly characterize the obtained material. This includes high-resolution accurate mass electrospray ionization mass spectrometry (HRAM-ESI-MS) to reveal the competing reactions that yield a set of oligomer-rich structures. <i>In silico</i> modeling correctly predicts the localization of the modification. The modification is found to be covalent and chiral and mainly proceeds through imine formation, resulting in a surface enantioselector display formation. Restricted diffusion lengths in the solid phase infer good retention of resolving power in ascending van Deemter régimes in chromatography. Meeting this criterion makes the yielding material a promising potential stationary phase candidate for performant chromatographic enantioseparations.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 3","pages":"491-501"},"PeriodicalIF":5.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12082358/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144095031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nonuniform Chiralization of Metal–Organic Frameworks Using Imine Chemistry 用亚胺化学研究金属-有机骨架的不均匀手性
IF 5.7
ACS Materials Au Pub Date : 2025-02-04 DOI: 10.1021/acsmaterialsau.4c0013910.1021/acsmaterialsau.4c00139
Balázs Álmos Novotny, Sauradeep Majumdar, Andres Ortega-Guerrero, Kevin Maik Jablonka, Elias Moubarak, Natalia Gasilova, Nency P. Domingues, Raluca-Ana Kessler, Emad Oveisi, Fatmah Mish Ebrahim and Berend Smit*, 
{"title":"Nonuniform Chiralization of Metal–Organic Frameworks Using Imine Chemistry","authors":"Balázs Álmos Novotny,&nbsp;Sauradeep Majumdar,&nbsp;Andres Ortega-Guerrero,&nbsp;Kevin Maik Jablonka,&nbsp;Elias Moubarak,&nbsp;Natalia Gasilova,&nbsp;Nency P. Domingues,&nbsp;Raluca-Ana Kessler,&nbsp;Emad Oveisi,&nbsp;Fatmah Mish Ebrahim and Berend Smit*,&nbsp;","doi":"10.1021/acsmaterialsau.4c0013910.1021/acsmaterialsau.4c00139","DOIUrl":"https://doi.org/10.1021/acsmaterialsau.4c00139https://doi.org/10.1021/acsmaterialsau.4c00139","url":null,"abstract":"<p >Homochiral metal–organic frameworks (MOFs) are exceptional media for heterogeneous enantiodifferentiation processes. Modifying available achiral structure-bearing MOF scaffolds is a preferred method to extend this class of materials. Reported postsynthetic covalent chiralizations generally lead to uniform, site-specific modifications. The use of chemically versatile modifying agents, like aldehydes, may instead result in the statistical formation of chemically nonuniform anchored products. In addition, the use of such modifying agents gives rise to spatial nonuniformities in the radial direction, due to prohibited diffusion through the MOF bulk. The advantageous grain structure formation plus molecular nonuniformity greatly increase the complexity of such systems. The use of such modifying agents, therefore, necessitates a broader holistic characterization. The present work explores the adaptation of imine chemistry for postsynthetic chiralization. A chiral aldehyde and a chiral ketone are probed on two amine-functionalized MOF substrates─MIL-125 NH<sub>2</sub> and UiO-66 NH<sub>2</sub>. The UiO-66 NH<sub>2</sub> modified with the natural product-derived (<i>R</i>)-2,2-dimethyl-1,3-dioxolane-4-carboxaldehyde ((<i>R</i>)-<b>1</b> aldehyde) is found to have the best performance in terms of reactivity and MOF stability. A comprehensive toolbox of methods was demonstrated to robustly characterize the obtained material. This includes high-resolution accurate mass electrospray ionization mass spectrometry (HRAM-ESI-MS) to reveal the competing reactions that yield a set of oligomer-rich structures. <i>In silico</i> modeling correctly predicts the localization of the modification. The modification is found to be covalent and chiral and mainly proceeds through imine formation, resulting in a surface enantioselector display formation. Restricted diffusion lengths in the solid phase infer good retention of resolving power in ascending van Deemter régimes in chromatography. Meeting this criterion makes the yielding material a promising potential stationary phase candidate for performant chromatographic enantioseparations.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 3","pages":"491–501 491–501"},"PeriodicalIF":5.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsmaterialsau.4c00139","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143940710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Glucose-Responsive Materials for Smart Insulin Delivery: From Protein-Based to Protein-Free Design. 用于智能胰岛素输送的葡萄糖反应材料:从基于蛋白质到无蛋白质设计。
IF 5.7
ACS Materials Au Pub Date : 2025-01-31 eCollection Date: 2025-03-12 DOI: 10.1021/acsmaterialsau.4c00138
Suchetan Pal, Tatini Rakshit, Sunita Saha, Dharmesh Jinagal
{"title":"Glucose-Responsive Materials for Smart Insulin Delivery: From Protein-Based to Protein-Free Design.","authors":"Suchetan Pal, Tatini Rakshit, Sunita Saha, Dharmesh Jinagal","doi":"10.1021/acsmaterialsau.4c00138","DOIUrl":"https://doi.org/10.1021/acsmaterialsau.4c00138","url":null,"abstract":"<p><p>Over the last four decades, glucose-responsive materials have emerged as promising candidates for developing smart insulin delivery systems, offering an alternative approach to treating diabetes. These materials replicate the pancreas's natural \"closed loop\" insulin secretion function by detecting changes in blood glucose levels and releasing insulin accordingly. This perspective highlights the evolution of glucose-responsive materials from protein-based materials, such as glucose oxidase (GOx), and glucose-binding proteins, such as concanavalin A (ConA), to protein-free materials, including phenylboronic acid (PBA) and their applications in smart insulin delivery. We first describe protein-based glucose-responsive systems that depend on different macromolecules, including enzymes and proteins, that interact directly with glucose to promote insulin release. However, these systems encounter significant stability, scalability, and immunogenicity challenges. In contrast, protein-free systems include hydrogels, nanogels/microgels, and microneedle patches, offering long-term stability and storability. In this direction, we discuss the design principles, mechanisms of glucose/pH sensitivity, and the disintegration of both protein-based and protein-free systems into different glucose environments. Finally, we outline the key challenges, potential solutions, and prospects for developing smart insulin delivery systems.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 2","pages":"239-252"},"PeriodicalIF":5.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907299/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143650427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Atomistic Electrocatalysts for Modulating the Oxygen Reduction Reaction Selectivity in Carbon-Based Materials: Active-Site Engineering, Local Environment, and Magnetism 调节碳基材料中氧还原反应选择性的原子电催化剂:活性位点工程、局部环境和磁性
IF 5.7
ACS Materials Au Pub Date : 2025-01-31 DOI: 10.1021/acsmaterialsau.4c0016610.1021/acsmaterialsau.4c00166
Jose Manuel Romo-Herrera,  and , Jonathan Guerrero-Sanchez*, 
{"title":"Atomistic Electrocatalysts for Modulating the Oxygen Reduction Reaction Selectivity in Carbon-Based Materials: Active-Site Engineering, Local Environment, and Magnetism","authors":"Jose Manuel Romo-Herrera,&nbsp; and ,&nbsp;Jonathan Guerrero-Sanchez*,&nbsp;","doi":"10.1021/acsmaterialsau.4c0016610.1021/acsmaterialsau.4c00166","DOIUrl":"https://doi.org/10.1021/acsmaterialsau.4c00166https://doi.org/10.1021/acsmaterialsau.4c00166","url":null,"abstract":"<p >The oxygen reduction reaction (ORR) is an electrochemical process that is key to tackling global concerns regarding the conversion and storage of clean energy as well as the development of sustainable water treatment. We mainly focus on nonprecious metal catalysts, specifically harnessing Carbon-based electrocatalysts. In the current invited perspective, we highlight three main ways to control the ORR selectivity, which is still a challenge under development: (i) engineering the active sites where the use of single-atom, double-atom, or small clusters of atoms of transition metals in the carbon matrix allow including more active sites for the reaction, (ii) using coordination shells and modifying the local environment of the active-sites with more electronegative elements generates a strong positive electrostatic potential in the active site thus improving the metal–O<sub>2</sub> interaction, and (iii) using spin-selection with magnetic single atoms where the magnetic moment strength of the single-atom and the triplet-to-singlet transition in the O<sub>2</sub> after adsorption. More attention should be paid to this effect since the magnetic properties are directly correlated with the O<sub>2</sub> adsorption strength, and at the same time, the selectivity of the O<sub>2</sub> adsorption is directly related to the two- or four-electron pathway. Selectivity is commonly discussed in carbon-based catalysts but is not always linked to atomistic effects. Therefore, it is necessary to understand and rationally design alternative electrocatalysts that can synergistically combine active transition metal centers, different local environments in their coordination shells, and magnetic control.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 3","pages":"441–450 441–450"},"PeriodicalIF":5.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsmaterialsau.4c00166","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143940712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Atomistic Electrocatalysts for Modulating the Oxygen Reduction Reaction Selectivity in Carbon-Based Materials: Active-Site Engineering, Local Environment, and Magnetism. 调节碳基材料中氧还原反应选择性的原子电催化剂:活性位点工程、局部环境和磁性。
IF 5.7
ACS Materials Au Pub Date : 2025-01-31 eCollection Date: 2025-05-14 DOI: 10.1021/acsmaterialsau.4c00166
Jose Manuel Romo-Herrera, Jonathan Guerrero-Sanchez
{"title":"Atomistic Electrocatalysts for Modulating the Oxygen Reduction Reaction Selectivity in Carbon-Based Materials: Active-Site Engineering, Local Environment, and Magnetism.","authors":"Jose Manuel Romo-Herrera, Jonathan Guerrero-Sanchez","doi":"10.1021/acsmaterialsau.4c00166","DOIUrl":"10.1021/acsmaterialsau.4c00166","url":null,"abstract":"<p><p>The oxygen reduction reaction (ORR) is an electrochemical process that is key to tackling global concerns regarding the conversion and storage of clean energy as well as the development of sustainable water treatment. We mainly focus on nonprecious metal catalysts, specifically harnessing Carbon-based electrocatalysts. In the current invited perspective, we highlight three main ways to control the ORR selectivity, which is still a challenge under development: (i) engineering the active sites where the use of single-atom, double-atom, or small clusters of atoms of transition metals in the carbon matrix allow including more active sites for the reaction, (ii) using coordination shells and modifying the local environment of the active-sites with more electronegative elements generates a strong positive electrostatic potential in the active site thus improving the metal-O<sub>2</sub> interaction, and (iii) using spin-selection with magnetic single atoms where the magnetic moment strength of the single-atom and the triplet-to-singlet transition in the O<sub>2</sub> after adsorption. More attention should be paid to this effect since the magnetic properties are directly correlated with the O<sub>2</sub> adsorption strength, and at the same time, the selectivity of the O<sub>2</sub> adsorption is directly related to the two- or four-electron pathway. Selectivity is commonly discussed in carbon-based catalysts but is not always linked to atomistic effects. Therefore, it is necessary to understand and rationally design alternative electrocatalysts that can synergistically combine active transition metal centers, different local environments in their coordination shells, and magnetic control.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 3","pages":"441-450"},"PeriodicalIF":5.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12082354/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144094792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Zinc Single-Atom Nanozyme As Carbonic Anhydrase Mimic for CO2 Capture and Conversion. 锌单原子纳米酶作为二氧化碳捕获和转化的碳酸酐酶模拟物。
IF 5.7
ACS Materials Au Pub Date : 2025-01-31 eCollection Date: 2025-03-12 DOI: 10.1021/acsmaterialsau.4c00156
Eslam M Hamed, Fun Man Fung, Sam F Y Li
{"title":"Zinc Single-Atom Nanozyme As Carbonic Anhydrase Mimic for CO<sub>2</sub> Capture and Conversion.","authors":"Eslam M Hamed, Fun Man Fung, Sam F Y Li","doi":"10.1021/acsmaterialsau.4c00156","DOIUrl":"https://doi.org/10.1021/acsmaterialsau.4c00156","url":null,"abstract":"<p><p>Single-atom nanozymes (SANs) are a class of nanozymes with metal centers that mimic the structure of metalloenzymes. Herein, we report the synthesis of Zn-N-C SAN, which mimics the action of the natural carbonic anhydrase enzyme. The two-step annealing technique led to a metal content of more than 18 wt %. Since the metal centers act as active sites, this high metal loading resulted in superior catalytic activity. Zn-SAN showed a CO<sub>2</sub> uptake of 2.3 mmol/g and a final conversion of CO<sub>2</sub> to bicarbonate of more than 91%. CO<sub>2</sub> was converted via a biomimetic process by allowing its adsorption by the catalyst, followed by the addition of the catalyst to HEPES buffer (pH = 8) to start the CO<sub>2</sub> conversion into HCO<sub>3</sub> <sup>-</sup>. Afterward, CaCl<sub>2</sub> was added to form a white CaCO<sub>3</sub> precipitate, which was then filtered, dried, and weighed. Active carbon and MCM-41 were used as controls under the same reaction conditions. According to the findings, the CO<sub>2</sub> sequestration capacity was 42 mg of CaCO<sub>3</sub>/mg of Zn-SAN. Some amino acids (AAs) with binding affinity for Zn were able to suppress the enzymatic activity of Zn-SAN by blocking the active metal centers. This strategy was used for the detection of His, Cys, Glu, and Asp with detection limits of 0.011, 0.031, 0.029, and 0.062 μM, respectively, and hence was utilized for quantifying these AAs in commercial dietary supplements.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 2","pages":"377-384"},"PeriodicalIF":5.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907284/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143651110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Glucose-Responsive Materials for Smart Insulin Delivery: From Protein-Based to Protein-Free Design 用于智能胰岛素输送的葡萄糖反应材料:从基于蛋白质到无蛋白质设计
IF 5.7
ACS Materials Au Pub Date : 2025-01-31 DOI: 10.1021/acsmaterialsau.4c0013810.1021/acsmaterialsau.4c00138
Suchetan Pal*, Tatini Rakshit, Sunita Saha and Dharmesh Jinagal, 
{"title":"Glucose-Responsive Materials for Smart Insulin Delivery: From Protein-Based to Protein-Free Design","authors":"Suchetan Pal*,&nbsp;Tatini Rakshit,&nbsp;Sunita Saha and Dharmesh Jinagal,&nbsp;","doi":"10.1021/acsmaterialsau.4c0013810.1021/acsmaterialsau.4c00138","DOIUrl":"https://doi.org/10.1021/acsmaterialsau.4c00138https://doi.org/10.1021/acsmaterialsau.4c00138","url":null,"abstract":"<p >Over the last four decades, glucose-responsive materials have emerged as promising candidates for developing smart insulin delivery systems, offering an alternative approach to treating diabetes. These materials replicate the pancreas’s natural “closed loop” insulin secretion function by detecting changes in blood glucose levels and releasing insulin accordingly. This perspective highlights the evolution of glucose-responsive materials from protein-based materials, such as glucose oxidase (GOx), and glucose-binding proteins, such as concanavalin A (ConA), to protein-free materials, including phenylboronic acid (PBA) and their applications in smart insulin delivery. We first describe protein-based glucose-responsive systems that depend on different macromolecules, including enzymes and proteins, that interact directly with glucose to promote insulin release. However, these systems encounter significant stability, scalability, and immunogenicity challenges. In contrast, protein-free systems include hydrogels, nanogels/microgels, and microneedle patches, offering long-term stability and storability. In this direction, we discuss the design principles, mechanisms of glucose/pH sensitivity, and the disintegration of both protein-based and protein-free systems into different glucose environments. Finally, we outline the key challenges, potential solutions, and prospects for developing smart insulin delivery systems.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 2","pages":"239–252 239–252"},"PeriodicalIF":5.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsmaterialsau.4c00138","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Zinc Single-Atom Nanozyme As Carbonic Anhydrase Mimic for CO2 Capture and Conversion 锌单原子纳米酶作为二氧化碳捕获和转化的碳酸酐酶模拟物
IF 5.7
ACS Materials Au Pub Date : 2025-01-30 DOI: 10.1021/acsmaterialsau.4c0015610.1021/acsmaterialsau.4c00156
Eslam M. Hamed*, Fun Man Fung* and Sam F. Y. Li*, 
{"title":"Zinc Single-Atom Nanozyme As Carbonic Anhydrase Mimic for CO2 Capture and Conversion","authors":"Eslam M. Hamed*,&nbsp;Fun Man Fung* and Sam F. Y. Li*,&nbsp;","doi":"10.1021/acsmaterialsau.4c0015610.1021/acsmaterialsau.4c00156","DOIUrl":"https://doi.org/10.1021/acsmaterialsau.4c00156https://doi.org/10.1021/acsmaterialsau.4c00156","url":null,"abstract":"<p >Single-atom nanozymes (SANs) are a class of nanozymes with metal centers that mimic the structure of metalloenzymes. Herein, we report the synthesis of Zn–N–C SAN, which mimics the action of the natural carbonic anhydrase enzyme. The two-step annealing technique led to a metal content of more than 18 wt %. Since the metal centers act as active sites, this high metal loading resulted in superior catalytic activity. Zn-SAN showed a CO<sub>2</sub> uptake of 2.3 mmol/g and a final conversion of CO<sub>2</sub> to bicarbonate of more than 91%. CO<sub>2</sub> was converted via a biomimetic process by allowing its adsorption by the catalyst, followed by the addition of the catalyst to HEPES buffer (pH = 8) to start the CO<sub>2</sub> conversion into HCO<sub>3</sub><sup>–</sup>. Afterward, CaCl<sub>2</sub> was added to form a white CaCO<sub>3</sub> precipitate, which was then filtered, dried, and weighed. Active carbon and MCM-41 were used as controls under the same reaction conditions. According to the findings, the CO<sub>2</sub> sequestration capacity was 42 mg of CaCO<sub>3</sub>/mg of Zn-SAN. Some amino acids (AAs) with binding affinity for Zn were able to suppress the enzymatic activity of Zn-SAN by blocking the active metal centers. This strategy was used for the detection of His, Cys, Glu, and Asp with detection limits of 0.011, 0.031, 0.029, and 0.062 μM, respectively, and hence was utilized for quantifying these AAs in commercial dietary supplements.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 2","pages":"377–384 377–384"},"PeriodicalIF":5.7,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsmaterialsau.4c00156","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pancake Bonding in the Stabilization of Cationic Acene Dimers. 阳离子丙烯酸二聚体稳定中的煎饼键。
IF 5.7
ACS Materials Au Pub Date : 2025-01-30 eCollection Date: 2025-03-12 DOI: 10.1021/acsmaterialsau.4c00153
Rameswar Bhattacharjee, Hans Lischka, Miklos Kertesz
{"title":"Pancake Bonding in the Stabilization of Cationic Acene Dimers.","authors":"Rameswar Bhattacharjee, Hans Lischka, Miklos Kertesz","doi":"10.1021/acsmaterialsau.4c00153","DOIUrl":"https://doi.org/10.1021/acsmaterialsau.4c00153","url":null,"abstract":"<p><p>This study provides a systematic investigation of intermolecular interactions in homodimer of acenes using density functional theory (DFT). Focusing on the +1-charged dimers-frequently encountered in crystal structures-our analysis explores the influence of this charge, which introduces an unpaired electron, significantly affecting electronic properties. The interaction energy of +1-charged acene dimers is significantly larger compared to their neutral counterparts, attributed to the emergence of \"pancake bonding″: a partially covalent interaction marked by intermolecular orbital overlap. This bonding mechanism contributes to the enhanced stability of charged acene dimers. Our findings indicate that the interplay between pancake bonding and van der Waals interactions influence the preferred orientations of monomers within these dimers. Transition state modeling reveals that orientational changes between dimer configurations do not completely break pancake bonds.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"5 2","pages":"365-376"},"PeriodicalIF":5.7,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907286/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143650823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pancake Bonding in the Stabilization of Cationic Acene Dimers 阳离子丙烯酸二聚体稳定中的煎饼键
IF 5.7
ACS Materials Au Pub Date : 2025-01-30 DOI: 10.1021/acsmaterialsau.4c0015310.1021/acsmaterialsau.4c00153
Rameswar Bhattacharjee*, Hans Lischka and Miklos Kertesz*, 
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