51
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De los Santos ZA, MacAvaney S, Russell K, Wolf C. Tandem Use of Optical Sensing and Machine Learning for the Determination of Absolute Configuration, Enantiomeric and Diastereomeric Ratios, and Concentration of Chiral Samples. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912904] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Sean MacAvaney
- Department of Computer Science Georgetown University Washington DC 20057 USA
| | - Katina Russell
- Department of Computer Science Georgetown University Washington DC 20057 USA
| | - Christian Wolf
- Department of Chemistry Georgetown University Washington DC 20057 USA
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52
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De Los Santos ZA, MacAvaney S, Russell K, Wolf C. Tandem Use of Optical Sensing and Machine Learning for the Determination of Absolute Configuration, Enantiomeric and Diastereomeric Ratios, and Concentration of Chiral Samples. Angew Chem Int Ed Engl 2019; 59:2440-2448. [PMID: 31714669 DOI: 10.1002/anie.201912904] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/04/2019] [Indexed: 12/17/2022]
Abstract
We have developed an optical method for accurate concentration, er, and dr analysis of amino alcohols based on a simple mix-and-measure workflow that is fully adaptable to multiwell plate technology and microscale analysis. The conversion of the four aminoindanol stereoisomers with salicylaldehyde to the corresponding Schiff base allows analysis of the dr based on a change in the UV maximum at 420 nm that is very different for the homo- and heterochiral diastereomers and of the concentration of the sample using a hypsochromic shift of another absorption band around 340 nm that is independent of the analyte stereochemistry. Subsequent in situ formation of CuII assemblies in the absence and presence of base enables quantification of the er values for each diastereomeric pair by CD analysis. Applying a linear programming method and a parameter sweep algorithm, we determined the concentration and relative amounts of each of the four stereoisomers in 20 samples of vastly different stereoisomeric compositions with an averaged absolute percent error of 1.7 %.
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Affiliation(s)
| | - Sean MacAvaney
- Department of Computer Science, Georgetown University, Washington, DC, 20057, USA
| | - Katina Russell
- Department of Computer Science, Georgetown University, Washington, DC, 20057, USA
| | - Christian Wolf
- Department of Chemistry, Georgetown University, Washington, DC, 20057, USA
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53
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Yue Y, Kong Y, Yang F, Zheng Z, Hu X, Guo D. Supramolecular Tandem Assay for Pyridoxal-5'-phosphate by the Reporter Pair of Guanidinocalix[5]Arene and Fluorescein. ChemistryOpen 2019; 8:1437-1440. [PMID: 32071829 PMCID: PMC7011187 DOI: 10.1002/open.201900316] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/18/2019] [Indexed: 11/23/2022] Open
Abstract
Guanidinocalix[5]arene and fluorescein reporter pair has been chosen to set up a supramolecular tandem assay principle based on the differential recognition of pyridoxal-5'-phosphate (the substrate of alkaline phosphatase, ALP), pyridoxal (the product of ALP) and phosphate (the product of ALP). This supramolecular tandem assay system offers an opportunity to monitor the activity of ALP in a label-free, continuous, and real-time manner. More importantly, a calibration curve can be given for selective and quantitative detection of pyridoxal-5'-phosphate (biomarker for several diseases).
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Affiliation(s)
- Yu‐Xin Yue
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), Tianjin Key Laboratory of Biosensing and Molecular RecognitionNankai UniversityTianjin300071P. R. China
| | - Yong Kong
- Research Institute of Petroleum Engineering, SinopecBeijing100101P. R. China
| | - Fan Yang
- Research Institute of Petroleum Engineering, SinopecBeijing100101P. R. China
| | - Zhe Zheng
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), Tianjin Key Laboratory of Biosensing and Molecular RecognitionNankai UniversityTianjin300071P. R. China
| | - Xin‐Yue Hu
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), Tianjin Key Laboratory of Biosensing and Molecular RecognitionNankai UniversityTianjin300071P. R. China
| | - Dong‐Sheng Guo
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), Tianjin Key Laboratory of Biosensing and Molecular RecognitionNankai UniversityTianjin300071P. R. China
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54
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Thanzeel FY, Sripada A, Wolf C. Quantitative Chiroptical Sensing of Free Amino Acids, Biothiols, Amines, and Amino Alcohols with an Aryl Fluoride Probe. J Am Chem Soc 2019; 141:16382-16387. [PMID: 31564090 DOI: 10.1021/jacs.9b07588] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The comprehensive determination of the absolute configuration, enantiomeric ratio, and total amount of standard amino acids by optical methods adaptable to high-throughput screening with modern plate readers has remained a major challenge to date. We now present a small-molecular probe that smoothly reacts with amino acids and biothiols in aqueous solution and thereby generates distinct chiroptical responses to accomplish this task. The achiral sensor is readily available, inexpensive, and suitable for chiroptical analysis of each of the 19 standard amino acids, biothiols, aliphatic, and aromatic amines and amino alcohols. The sensing method is operationally simple, and data collection and processing are straightforward. The utility and practicality of the assay are demonstrated with the accurate analysis of 10 aspartic acid samples covering a wide concentration range and largely varying enantiomeric compositions. Accurate er sensing of 85 scalemic samples of Pro, Met, Cys, Ala, methylpyrrolidine, 1-(2-naphthyl)amine, and mixtures thereof is also presented.
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Affiliation(s)
- F Yushra Thanzeel
- Department of Chemistry , Georgetown University , 37th and O Streets , Washington , D.C. 20057 , United States
| | - Archita Sripada
- Department of Chemistry , Georgetown University , 37th and O Streets , Washington , D.C. 20057 , United States
| | - Christian Wolf
- Department of Chemistry , Georgetown University , 37th and O Streets , Washington , D.C. 20057 , United States
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55
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Thanzeel FY, Balaraman K, Wolf C. Streamlined Asymmetric Reaction Development: A Case Study with Isatins. Chemistry 2019; 25:11020-11025. [DOI: 10.1002/chem.201902688] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/08/2019] [Indexed: 12/31/2022]
Affiliation(s)
- F. Yushra Thanzeel
- Department of Chemistry Georgetown University 37th and O Streets Washington DC 20057 USA
| | - Kaluvu Balaraman
- Department of Chemistry Georgetown University 37th and O Streets Washington DC 20057 USA
| | - Christian Wolf
- Department of Chemistry Georgetown University 37th and O Streets Washington DC 20057 USA
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56
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Pilicer SL, Mancinelli M, Mazzanti A, Wolf C. Predictive chirality sensing via Schiff base formation. Org Biomol Chem 2019; 17:6699-6705. [PMID: 31243416 DOI: 10.1039/c9ob01265f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Among the large number of chiroptical sensors that have been developed to date, few allow rational determination of the absolute configuration of chiral substrates together with quantitative ee analysis. We have prepared and tested stereodynamic N-aryl aminobenzaldehyde sensors that bind chiral amines via Schiff base formation. The covalent binding of the amine substrate generates a conformational bias in the chromophoric sensor moiety which results in characteristic CD signals. Computational analysis revealed that CD prediction of the sign of the Cotton effect and thus determination of the absolute configuration of the substrate becomes practical with a sterically crowded sensor design because the number of conformations to be considered is largely reduced and the chiroptical sensor response is less sensitive to conformational equilibria. The amplitude of the measured CD signal can be used for quantitative ee analysis of nonracemic amine samples with the help of a calibration curve.
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Affiliation(s)
- Samantha L Pilicer
- Department of Chemistry, Georgetown University, 37th and O Streets, Washington, DC 20057, USA.
| | - Michele Mancinelli
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy.
| | - Andrea Mazzanti
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy.
| | - Christian Wolf
- Department of Chemistry, Georgetown University, 37th and O Streets, Washington, DC 20057, USA.
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57
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Wang W, Xia X, Bian G, Song L. A chiral sensor for recognition of varied amines based on 19F NMR signals of newly designed rhodium complexes. Chem Commun (Camb) 2019; 55:6098-6101. [PMID: 31069349 DOI: 10.1039/c9cc01942a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel chiral octahedral rhodium complex containing fluorine has been developed to be an excellent chiral sensor for a variety of amines including diamines, monoamines, amino alcohols and amino acids, showing well distinguishable 19F NMR signals and an accurate measurement of enantiomeric determination.
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Affiliation(s)
- Wei Wang
- The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
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58
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Zheng H, Ye H, Yu X, You L. Interplay between n→π* Interactions and Dynamic Covalent Bonds: Quantification and Modulation by Solvent Effects. J Am Chem Soc 2019; 141:8825-8833. [PMID: 31075197 DOI: 10.1021/jacs.9b01006] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Orbital donor-acceptor interactions play critical roles throughout chemistry, and hence, their regulation and functionalization are of great significance. Herein we demonstrate for the first time the investigation of n→π* interactions through the strategy of dynamic covalent chemistry (DCC), and we further showcase its use in the stabilization of imine. The n→π* interaction between donor X and acceptor aldehyde/imine within 2-X-2'-formylbiphenyl derivatives was found to significantly influence the thermodynamics of imine exchange. The orbital interaction was then quantified through imine exchange, the equilibrium of which was successfully correlated with the difference in natural bond orbital stabilization energy of n→π* interactions of aldehyde and its imine. Moreover, the examination of solvent effects provided insights into the distinct feature of the modulation of n→π* interaction with aprotic and protic solvents. The n→π* interaction involving imine was enhanced in protic solvents due to hydrogen bonding with the solvent. This finding further enabled the stabilization of imine in purely aqueous solution. The strategies and results reported should find application in many fields, including molecular recognition, biological labeling, and asymmetric catalysis.
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Affiliation(s)
- Hao Zheng
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou 350002 , China.,College of Chemistry and Material Science , Fujian Normal University , Fuzhou 350007 China
| | - Hebo Ye
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou 350002 , China.,University of Chinese of Academy of Sciences , Beijing 100049 , China
| | - Xiaoxia Yu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou 350002 , China.,College of Chemistry and Material Science , Fujian Normal University , Fuzhou 350007 China
| | - Lei You
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences , Fuzhou 350002 , China.,University of Chinese of Academy of Sciences , Beijing 100049 , China
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59
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Click chemistry enables quantitative chiroptical sensing of chiral compounds in protic media and complex mixtures. Nat Commun 2018; 9:5323. [PMID: 30552322 PMCID: PMC6294054 DOI: 10.1038/s41467-018-07695-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 11/16/2018] [Indexed: 12/31/2022] Open
Abstract
Click reactions have become powerful synthetic tools with unique applications in the health and materials sciences. Despite the progress with optical sensors that exploit the principles of dynamic covalent chemistry, metal coordination or supramolecular assemblies, quantitative analysis of complex mixtures remains challenging. Herein, we report the use of a readily available coumarin conjugate acceptor for chiroptical click chirality sensing of the absolute configuration, concentration and enantiomeric excess of several compound classes. This method has several attractive features, including wide scope, fast substrate fixation without by-product formation or complicate equilibria often encountered in reversible substrate binding, excellent solvent compatibility, and tolerance of air and water. The ruggedness and practicality of this approach are demonstrated by comprehensive analysis of nonracemic monoamine samples and crude asymmetric imine hydrogenation mixtures without work-up. Click chemosensing addresses increasingly important time efficiency, cost, labor and chemical sustainability aspects and streamlines asymmetric reaction development at the mg scale.
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60
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Herrera BT, Pilicer SL, Anslyn EV, Joyce LA, Wolf C. Optical Analysis of Reaction Yield and Enantiomeric Excess: A New Paradigm Ready for Prime Time. J Am Chem Soc 2018; 140:10385-10401. [PMID: 30059621 DOI: 10.1021/jacs.8b06607] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This Perspective highlights the advances of optical methods for asymmetric reaction discovery. Optical analysis allows for the determination of absolute configuration, enantiomeric excess and reaction yield that is amenable to high-throughput experimentation. Thus, the synthetic organic community is encouraged to incorporate the methods discussed to expedite the development of high-yielding, enantioselective transformations.
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Affiliation(s)
- Brenden T Herrera
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Samantha L Pilicer
- Department of Chemistry , Georgetown University , Washington, D.C. 20057 , United States
| | - Eric V Anslyn
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Leo A Joyce
- Department of Process Research & Development , Merck & Co., Inc. , Rahway , New Jersey 07065 , United States
| | - Christian Wolf
- Department of Chemistry , Georgetown University , Washington, D.C. 20057 , United States
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61
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Ni C, Zha D, Ye H, Hai Y, Zhou Y, Anslyn EV, You L. Dynamic Covalent Chemistry within Biphenyl Scaffolds: Reversible Covalent Bonding, Control of Selectivity, and Chirality Sensing with a Single System. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711602] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Cailing Ni
- State Key Laboratory of Structural Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou 350002 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Daijun Zha
- State Key Laboratory of Structural Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou 350002 China
| | - Hebo Ye
- State Key Laboratory of Structural Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou 350002 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Yu Hai
- State Key Laboratory of Structural Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou 350002 China
| | - Yuntao Zhou
- State Key Laboratory of Structural Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou 350002 China
| | - Eric V. Anslyn
- Department of Chemistry; The University of Texas at Austin; Austin TX 78712 USA
| | - Lei You
- State Key Laboratory of Structural Chemistry; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou 350002 China
- University of Chinese Academy of Sciences; Beijing 100049 China
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62
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Ni C, Zha D, Ye H, Hai Y, Zhou Y, Anslyn EV, You L. Dynamic Covalent Chemistry within Biphenyl Scaffolds: Reversible Covalent Bonding, Control of Selectivity, and Chirality Sensing with a Single System. Angew Chem Int Ed Engl 2018; 57:1300-1305. [PMID: 29239090 DOI: 10.1002/anie.201711602] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Indexed: 11/10/2022]
Abstract
Axial chirality is a prevalent and important phenomenon in chemistry. Herein we report a combination of dynamic covalent chemistry and axial chirality for the development of a versatile platform for the binding and chirality sensing of multiple classes of mononucleophiles. An equilibrium between an open aldehyde and its cyclic hemiaminal within biphenyl derivatives enabled the dynamic incorporation of a broad range of alcohols, thiols, primary amines, and secondary amines with high efficiency. Selectivity toward different classes of nucleophiles was also achieved by regulating the distinct reactivity of the system with external stimuli. Through induced helicity as a result of central-to-axial chirality transfer, the handedness and ee values of chiral monoalcohol and monoamine analytes were reported by circular dichroism. The strategies introduced herein should find application in many contexts, including assembly, sensing, and labeling.
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Affiliation(s)
- Cailing Ni
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Daijun Zha
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
| | - Hebo Ye
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yu Hai
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
| | - Yuntao Zhou
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
| | - Eric V Anslyn
- Department of Chemistry, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Lei You
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
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63
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Zuo W, Huang Z, Zhao Y, Xu W, Liu Z, Yang XJ, Jia C, Wu B. Chirality sensing of choline derivatives by a triple anion helicate cage through induced circular dichroism. Chem Commun (Camb) 2018; 54:7378-7381. [DOI: 10.1039/c8cc03883j] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A racemic A2L3 triple anion helicate cage is able to sense chiral choline derivatives by induced circular dichroism.
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Affiliation(s)
- Wei Zuo
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi’an 710069
- China
| | - Zhe Huang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi’an 710069
- China
| | - Yanxia Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi’an 710069
- China
| | - Wenhua Xu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi’an 710069
- China
| | - Zhihua Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi’an 710069
- China
| | - Xiao-Juan Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi’an 710069
- China
| | - Chuandong Jia
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi’an 710069
- China
| | - Biao Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi’an 710069
- China
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64
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Zardi P, Wurst K, Licini G, Zonta C. Concentration-Independent Stereodynamic g-Probe for Chiroptical Enantiomeric Excess Determination. J Am Chem Soc 2017; 139:15616-15619. [PMID: 29039937 DOI: 10.1021/jacs.7b09469] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Enantiomeric excess (ee) determination is crucial in many aspects of science, from synthesis to materials. Within this subject, coupling molecular sensors with chiroptical techniques is a straightforward approach to the stereochemical analysis of chiral molecules, especially in terms of process immediacy and labor. Stereodynamic probes typically consist of racemic mixtures of rapidly interconverting enantiomeric conformers able to recognize a chiral analyte and greatly amplify its chiroptical readout. A great number of sensors have been developed, but their activity is generally restricted to one or a few classes of chemicals, and the analysis outcome relies on precise knowledge of the probe and analyte concentrations. This aspect in particular limits the potential practical applications. Here we report an oxo-vanadium(V) aminotriphenolate complex that was found to act as a concentration-independent stereodynamic sensor for a wide range of compounds. The bare complex is CD-silent, but coordination of an enantioenriched substrate immediately gives rise to intense Cotton effects in the visible region. Furthermore, a geometry change during the substrate-complex interaction leads to a marked optical response, as witnessed by a strong red-shift of the probe absorption bands, thus allowing the generation of dichroic signals in an "interference-free" area of the spectrum. This peculiarity allows for a linear correlation at high wavelengths between the ee of the analyte and anisotropy g-factor. This parameter derives from the differential circularly polarized light absorption of the sample but is independent of concentration. The newly developed sensor based on a simple coordination process has an unprecedented general character in terms of substrate scope and employment.
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Affiliation(s)
- Paolo Zardi
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova , 35131 Padova, Italy
| | - Klaus Wurst
- Institut für Allgemeine, Anorganische und Theoretische Chemie, University of Innsbruck , Innrain 80/82, A-6020 Innsbruck, Austria
| | - Giulia Licini
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova , 35131 Padova, Italy
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova , 35131 Padova, Italy
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65
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De los Santos ZA, Legaux NM, Wolf C. Chirality sensing with stereodynamic copper(I) complexes. Chirality 2017; 29:663-669. [DOI: 10.1002/chir.22765] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 08/16/2017] [Accepted: 08/17/2017] [Indexed: 12/14/2022]
Affiliation(s)
| | | | - Christian Wolf
- Department of Chemistry Georgetown University Washington D.C. USA
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66
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Noguchi T, Roy B, Yoshihara D, Sakamoto J, Yamamoto T, Shinkai S. A Chiral Recognition System Orchestrated by Self-Assembly: Molecular Chirality, Self-Assembly Morphology, and Fluorescence Response. Angew Chem Int Ed Engl 2017; 56:12518-12522. [PMID: 28749601 DOI: 10.1002/anie.201706142] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 07/24/2017] [Indexed: 11/10/2022]
Abstract
The newly developed oligophenylenevinylene (OPV)-based fluorescent (FL) chiral chemosensor (OPV-Me) for the representative enantiomeric guest, 1,2-cyclohexanedicarboxylic acid (1,2-CHDA: RR- and SS-form) showed the high chiral discrimination ability, resulting in the different aggregation modes of OPV-Me self-assembly: RR-CHDA directed the fibrous supramolecular aggregate, whereas SS-CHDA directed the finite aggregate. The consequent FL intensity toward RR-CHDA was up to 30 times larger than that toward SS-CHDA. Accordingly, highly enantioselective recognition was achieved. Application to the chirality sensing was also possible: OPV-Me exhibited a linear relationship between the FL intensity and the enantiomeric excess through the morphological development of stereocomplex aggregates. These results clearly show that the chiral recognition ability is manifested by the amplification cascade of the chirality difference through self-assembly.
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Affiliation(s)
- Takao Noguchi
- Institute for Advanced Study, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan.,Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Japan.,Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Nanotechnology Laboratory, 4-1 Kyudai-Shinmachi, Nishi-ku, Fukuoka, 819-0388, Japan
| | - Bappaditya Roy
- Institute for Advanced Study, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Daisuke Yoshihara
- Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Nanotechnology Laboratory, 4-1 Kyudai-Shinmachi, Nishi-ku, Fukuoka, 819-0388, Japan
| | - Junji Sakamoto
- Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Nanotechnology Laboratory, 4-1 Kyudai-Shinmachi, Nishi-ku, Fukuoka, 819-0388, Japan
| | - Tatsuhiro Yamamoto
- Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Nanotechnology Laboratory, 4-1 Kyudai-Shinmachi, Nishi-ku, Fukuoka, 819-0388, Japan
| | - Seiji Shinkai
- Institute for Advanced Study, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, 819-0395, Japan.,Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Nanotechnology Laboratory, 4-1 Kyudai-Shinmachi, Nishi-ku, Fukuoka, 819-0388, Japan
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67
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Noguchi T, Roy B, Yoshihara D, Sakamoto J, Yamamoto T, Shinkai S. A Chiral Recognition System Orchestrated by Self‐Assembly: Molecular Chirality, Self‐Assembly Morphology, and Fluorescence Response. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706142] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Takao Noguchi
- Institute for Advanced Study Kyushu University 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
- Department of Chemistry and Biochemistry Graduate School of Engineering Kyushu University Japan
- Nanotechnology Laboratory Institute of Systems, Information Technologies and Nanotechnologies (ISIT) 4-1 Kyudai-Shinmachi Nishi-ku Fukuoka 819-0388 Japan
| | - Bappaditya Roy
- Institute for Advanced Study Kyushu University 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
| | - Daisuke Yoshihara
- Nanotechnology Laboratory Institute of Systems, Information Technologies and Nanotechnologies (ISIT) 4-1 Kyudai-Shinmachi Nishi-ku Fukuoka 819-0388 Japan
| | - Junji Sakamoto
- Nanotechnology Laboratory Institute of Systems, Information Technologies and Nanotechnologies (ISIT) 4-1 Kyudai-Shinmachi Nishi-ku Fukuoka 819-0388 Japan
| | - Tatsuhiro Yamamoto
- Nanotechnology Laboratory Institute of Systems, Information Technologies and Nanotechnologies (ISIT) 4-1 Kyudai-Shinmachi Nishi-ku Fukuoka 819-0388 Japan
| | - Seiji Shinkai
- Institute for Advanced Study Kyushu University 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
- Nanotechnology Laboratory Institute of Systems, Information Technologies and Nanotechnologies (ISIT) 4-1 Kyudai-Shinmachi Nishi-ku Fukuoka 819-0388 Japan
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68
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Wang LL, Chen Z, Liu WE, Ke H, Wang SH, Jiang W. Molecular Recognition and Chirality Sensing of Epoxides in Water Using Endo-Functionalized Molecular Tubes. J Am Chem Soc 2017; 139:8436-8439. [PMID: 28609613 DOI: 10.1021/jacs.7b05021] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Chiral epoxides are important intermediates in chemistry and biology. The high-throughput screening of asymmetric epoxidation conditions requires fast determination of the absolute configurations and ee values of chiral epoxides. Herein, we report molecular recognition and chiroptical sensing of epoxides in water using endo-functionalized molecular tubes. The absolute configurations and ee values were simultaneously determined by circular dichroism spectroscopy. In addition, real-time monitoring as well as the application to real asymmetric epoxidation was demonstrated. The method is simple, environmentally friendly, and amenable to high-throughput screening.
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Affiliation(s)
- Li-Li Wang
- Department of Chemistry, South University of Science and Technology of China , Xueyuan Boulevard 1088, Nanshan District, Shenzhen 518055, China.,School of Chemistry and Chemical Engineering, Southeast University , Nanjing 211189, China
| | - Zhao Chen
- Department of Chemistry, South University of Science and Technology of China , Xueyuan Boulevard 1088, Nanshan District, Shenzhen 518055, China
| | - Wei-Er Liu
- Department of Chemistry, South University of Science and Technology of China , Xueyuan Boulevard 1088, Nanshan District, Shenzhen 518055, China
| | - Hua Ke
- Department of Chemistry, South University of Science and Technology of China , Xueyuan Boulevard 1088, Nanshan District, Shenzhen 518055, China.,School of Chemistry and Chemical Engineering, Southeast University , Nanjing 211189, China
| | - Sheng-Hua Wang
- Department of Chemistry, South University of Science and Technology of China , Xueyuan Boulevard 1088, Nanshan District, Shenzhen 518055, China
| | - Wei Jiang
- Department of Chemistry, South University of Science and Technology of China , Xueyuan Boulevard 1088, Nanshan District, Shenzhen 518055, China
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69
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Thanzeel FY, Wolf C. Substrate‐Specific Amino Acid Sensing Using a Molecular
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‐Cysteine Probe for Comprehensive Stereochemical Analysis in Aqueous Solution. Angew Chem Int Ed Engl 2017; 56:7276-7281. [DOI: 10.1002/anie.201701188] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 03/10/2017] [Indexed: 01/07/2023]
Affiliation(s)
- F. Yushra Thanzeel
- Department of Chemistry Georgetown University 37th and O Streets Washington DC 20057 USA
| | - Christian Wolf
- Department of Chemistry Georgetown University 37th and O Streets Washington DC 20057 USA
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70
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Thanzeel FY, Wolf C. Substratspezifische Analyse von Aminosäuren mit Sensoren für
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‐Cystein: umfassende stereochemische Untersuchungen in wässriger Lösung. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701188] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- F. Yushra Thanzeel
- Department of Chemistry Georgetown University 37th and O Streets Washington DC 20057 USA
| | - Christian Wolf
- Department of Chemistry Georgetown University 37th and O Streets Washington DC 20057 USA
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