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Li D, Lv Y, Xia H, Huang J, Liu W, Yu J, Jing G, Liu W, Sun Y, Li W. Target-activated multivalent sensing platform for improving the sensitivity and selectivity of Hg2+ detection. Anal Chim Acta 2023; 1256:341123. [PMID: 37037627 DOI: 10.1016/j.aca.2023.341123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 04/03/2023]
Abstract
Sensitivity and selectivity are critical parameters to evaluate the performance of sensors. For trace detection, it remains a challenge to design a new sensor that achieves high sensitivity and selectivity simultaneously. Here, we present a target-activated dual Mg2+-dependent DNAzyme (MNAzyme) that served as a simple sensing model to explore the multivalency in improving the analytical sensitivity and selectivity for target detection. Mercury ion (Hg2+), a notorious toxic metal ion, was selected as a model target. In the presence of Hg2+, the thymine-rich regions of the hairpin probe and primer could hybridize to form a stable duplex via the thymine-Hg2+-thymine structure. Then, an intact enzyme sequence was exposed and two separate enzyme fragments were close to each other, generating a dual MNAzyme. Benefiting from the localized high-concentration of the enzyme strand, the dual MNAzyme showed a remarkable improvement in binding stability. The catalytic rate constant of the dual MNAzyme was theoretically 1.60 times higher than that of the monomeric counterpart, and the sensitivity and selectivity had 4.50 and 1.44-fold enhancement, respectively. When the dual MNAzyme was used for sensor applications, the limit of detection was determined to be 0.04 and 0.2 nM via UV-vis spectrophotometer and naked eye, respectively. Meanwhile, the method offered desirable selectivity toward Hg2+ against other metal ions. With the advantages of simple operation, high sensitivity, and desirable selectivity, the developed multivalent sensing platform could be easily expanded in the future for the on-site detection of other low-abundance analytes.
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Affiliation(s)
- Dongyan Li
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Yuxiong Lv
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Huaiyue Xia
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Jing Huang
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, 410004, China
| | - Wenjie Liu
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Jianna Yu
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Guoxing Jing
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Wen Liu
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Yingying Sun
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Wenshan Li
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China.
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Hashidzume A, Itami T, Kamon Y, Harada A. A Simplified Model for Multivalent Interaction Competing with a Low Molecular Weight Competitor. CHEM LETT 2020. [DOI: 10.1246/cl.200501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Akihito Hashidzume
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Takahiro Itami
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Yuri Kamon
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Akira Harada
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Gao TZ, Sun Z, Yan X, Wu HC, Yan H, Bao Z. Engineering Supramolecular Polymer Conformation for Efficient Carbon Nanotube Sorting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2000923. [PMID: 32500637 DOI: 10.1002/smll.202000923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/07/2020] [Accepted: 04/27/2020] [Indexed: 06/11/2023]
Abstract
Supramolecular polymer sorting is a promising approach to separating single-walled carbon nanotubes (CNTs) by electronic type. Unlike conjugated polymers, they can be easily removed from the CNTs after sorting by breaking the supramolecular bonds, allowing for isolation of electronically pristine CNTs as well as facile recycling of the sorting polymer. However, little is understood about how supramolecular polymer properties affect CNT sorting. Herein, chain stoppers are used to engineer the conformation of a supramolecular sorting polymer, thereby elucidating the relationship between sorting efficacy and polymer conformation. Through NMR and UV-vis spectroscopy, small-angle X-ray scattering (SAXS), and thermodynamic modeling, it is shown that this supramolecular polymer exhibits ring-chain equilibrium, and that this equilibrium can be skewed toward chains by the addition of chain stoppers. Furthermore, by controlling the stopper-monomer ratio, the sorting yield can be doubled from 7% to 14% without compromising the semiconducting purity (>99%) or properties of sorted CNTs.
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Affiliation(s)
- Theodore Z Gao
- Department of Materials Science & Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Zehao Sun
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Xuzhou Yan
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Hung-Chin Wu
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Hongping Yan
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Zhenan Bao
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
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Shandilya E, Maiti S. Deconvolution of Transient Species in a Multivalent Fuel‐Driven Multistep Assembly under Dissipative Conditions. CHEMSYSTEMSCHEM 2020. [DOI: 10.1002/syst.201900040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ekta Shandilya
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali Knowledge City, Manauli 140306 India
| | - Subhabrata Maiti
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali Knowledge City, Manauli 140306 India
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Teunissen AJP, Paffen TFE, Filot IAW, Lanting MD, van der Haas RJC, de Greef TFA, Meijer EW. Supramolecular interactions between catalytic species allow rational control over reaction kinetics. Chem Sci 2019; 10:9115-9124. [PMID: 31827754 PMCID: PMC6889839 DOI: 10.1039/c9sc02357g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 08/14/2019] [Indexed: 11/21/2022] Open
Abstract
The adaptivity of biological reaction networks largely arises through non-covalent regulation of catalysts' activity. Such type of catalyst control is still nascent in synthetic chemical networks and thereby hampers their ability to display life-like behavior. Here, we report a bio-inspired system in which non-covalent interactions between two complementary phase-transfer catalysts are used to regulate reaction kinetics. While one catalyst gives bimolecular kinetics, the second displays autoinductive feedback, resulting in sigmoidal kinetics. When both catalysts are combined, the interactions between them allow rational control over the shape of the kinetic curves. Computational models are used to gain insight into the structure, interplay, and activity of each catalytic species, and the scope of the system is examined by optimizing the linearity of the kinetic curves. Combined, our findings highlight the effectiveness of regulating reaction kinetics using non-covalent catalyst interactions, but also emphasize the risk for unforeseen catalytic contributions in complex systems and the necessity to combine detailed experiments with kinetic modelling.
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Affiliation(s)
- Abraham J P Teunissen
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Laboratory of Macromolecular and Organic Chemistry , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands
| | - Tim F E Paffen
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Laboratory of Macromolecular and Organic Chemistry , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands
| | - Ivo A W Filot
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Schuit Institute for Catalysis , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands
| | - Menno D Lanting
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Laboratory of Macromolecular and Organic Chemistry , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands
| | - Roy J C van der Haas
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Laboratory of Macromolecular and Organic Chemistry , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands
| | - Tom F A de Greef
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Computational Biology , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands
| | - E W Meijer
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands . ; .,Laboratory of Macromolecular and Organic Chemistry , Eindhoven University of Technology , P.O. Box 513 , 5600 MB Eindhoven , The Netherlands
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Madhu S, Gonnade RG, Das T, Vanka K, Sanjayan GJ. Twelve-Armed Hexaphenylbenzene-Based Giant Supramolecular Framework for Entrapping Guest Molecules. Chempluschem 2018; 83:1032-1037. [PMID: 31950723 DOI: 10.1002/cplu.201800478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Indexed: 11/11/2022]
Abstract
Host-guest chemistry is a functional model in supramolecular chemistry for understanding specific process occurring in biological systems. Herein, we describe a rationally designed giant multiarmed hexaphenylbenzene (HPB)-based supramolecular frameworks which encapsulate a variety of guest molecules in the voids of their crystal lattice through the cooperative interplay of multivalency, noncovalent forces and backbone rigidity. In this connection, pseudo-axially substituted twelve-armed hexaphenylbenzene was synthesized and its molecular entrapping nature was studied by varying number of H-bond donor-acceptor sites in the arms. The per-methyl esterified HPB acted as a cavitand to include nonpolar and polar aprotic guests in its crystal structure via C-H⋅⋅⋅π, C-H⋅⋅⋅O and C-H⋅⋅⋅N interactions. The corresponding amidated HPB showed unprecedented inclusion of ammonia and segregation of the guest molecules according to their polarity in the lattice. Furthermore, this molecular entrapping system has been used to obtain the crystal structure of a hitherto unproven 2-azaallenium intermediate, which had been proposed to be involved in aminomethylation of activated arenes.
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Affiliation(s)
- Suresh Madhu
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411 008, India.,Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110001, India
| | - Rajesh G Gonnade
- Center for Material Characterization, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Tamal Das
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Kumar Vanka
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India
| | - Gangadhar J Sanjayan
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411 008, India.,Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi, 110001, India
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Abstract
A buffer reaction actively resists changes to the concentration of a chemical species. Typically, buffering reactions have only been able to regulate the concentration of hydronium (i.e., pH) and other ions. Here, we develop a new class of buffers that regulate the concentrations of short sequences of DNA (i.e., oligonucleotides). A buffer's behavior is determined by its set point concentration, capacity to resist disturbances, and response time after a disturbance. We provide simple mathematical formulas for selecting rate constants to tune each of these properties and show how to design DNA sequences and concentrations to implement the desired rate constants. We demonstrate several oligonucleotide buffers that maintain oligonucleotide set point concentrations between 10 and 80 nM in the presence of disturbances of 50 to 500 nM, with response times of less than 10 min to 1.5 h. Multiple buffers can regulate different sequences of DNA in parallel without crosstalk. Oligonucleotide buffers could stabilize and restore reactant concentrations in DNA circuits or in self-assembly processes, allowing such systems to operate reliably for extended durations. These buffers might also be coupled to other reactions to buffer molecules other than DNA. In general, an oligonucleotide buffer can be viewed as a chemical "battery" that maintains the total chemical potential of a buffered species in a closed system.
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