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Roy S, Laha J, Reja A, Das D. Allosteric Control of the Catalytic Properties of Dipeptide-Based Supramolecular Assemblies. J Am Chem Soc 2024; 146:22522-22529. [PMID: 39088245 DOI: 10.1021/jacs.4c06447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
Allostery, as seen in extant biology, governs the activity regulation of enzymes through the redistribution of conformational equilibria upon binding an effector. Herein, a minimal design is demonstrated where a dipeptide can exploit dynamic imine linkage to condense with simple aldehydes to access spherical aggregates as catalytically active states, which facilitates an orthogonal reaction due to the closer proximity of catalytic residues (imidazoles). The allosteric site (amine) of the minimal catalyst can concomitantly bind to an inhibitor via a dynamic exchange, which leads to the alternation of the energy landscape of the self-assembled state, resulting in downregulation of catalytic activity. Further, temporal control over allosteric regulation is realized via a feedback-controlled autonomous reaction network that utilizes the hydrolytic activity of the (in)active state as a function of time.
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Affiliation(s)
- Soumili Roy
- Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
| | - Janmejay Laha
- Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
| | - Antara Reja
- Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
| | - Dibyendu Das
- Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
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2
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Sun Q, Dong W, Bao B, Lyu Y, Han J, Guo R. Hydrolysis of Nerve Agent Simulants Accelerated by Stimuli-Responsive Dinuclear Catalysts. Inorg Chem 2024; 63:9975-9982. [PMID: 38747890 DOI: 10.1021/acs.inorgchem.4c01061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2024]
Abstract
The ability to control the catalytic activity of enzymes in chemical transformations is essential for the design and development of artificial catalysts. Herein, we report the synthesis and characterization of functional ligands featuring two 1,4,7,10-tetraazacyclododecane units linked by an azobenzene group and their corresponding dinuclear Zn(II) complexes. We show that the configuration switching (E/Z) of the azobenzene spacer in the ligands and their dinuclear Zn(II) complexes is reversibly controlled by irradiation with UV and visible light. The Zn(II)-metal complexes are light-responsive catalysts for the hydrolytic cleavage of nerve agent simulants, i.e., p-nitrophenyl diphenyl phosphate and methyl paraoxon. The catalytic activity of the Z-isomers of the dinuclear Zn(II) complexes outperformed that of the E-counterparts. Moreover, combining the less active E-isomers with gold nanoparticles induced an enhancement in the hydrolysis rate of p-nitrophenyl diphenyl phosphate. Kinetic analysis has shown that the catalytic site appears to involve a single metal ion. We explain our results by considering the different desolvation effects occurring in the catalyst's configurations in the solution and the catalytic systems involving gold nanoparticles.
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Affiliation(s)
- Qingqing Sun
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou ,Jiangsu 225002, China
| | - Wenqian Dong
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou ,Jiangsu 225002, China
| | - Baocheng Bao
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou ,Jiangsu 225002, China
| | - Yanchao Lyu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou ,Jiangsu 225002, China
| | - Jie Han
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou ,Jiangsu 225002, China
| | - Rong Guo
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou ,Jiangsu 225002, China
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3
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Solra M, Kapila R, Das S, Bhatt P, Rana S. Transient Metallo-Lipidoid Assemblies Amplify Covalent Catalysis of Aqueous and Non-Aqueous Reactions. Angew Chem Int Ed Engl 2024; 63:e202400348. [PMID: 38315883 DOI: 10.1002/anie.202400348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 02/02/2024] [Accepted: 02/05/2024] [Indexed: 02/07/2024]
Abstract
Dissipative supramolecular assemblies are hallmarks of living systems, contributing to their complex, dynamic structures and emerging functions. Living cells can spatiotemporally control diverse biochemical reactions in membrane compartments and condensates, regulating metabolite levels, signal transduction or remodeling of the cytoskeleton. Herein, we constructed membranous compartments using self-assembly of lipid-like amphiphiles (lipidoid) in aqueous medium. The new double-tailed lipidoid features Cu(II) coordinated with a tetravalent chelator that dictates the binding of two amphiphilic ligands in cis-orientation. Hydrophobic interactions between the lipidoids coupled with intermolecular hydrogen bonding led to a well-defined bilayer vesicle structure. Oil-soluble SNAr reaction is efficiently upregulated in the hydrophobic cavity, acting as a catalytic crucible. The modular system allows easy incorporation of exposed primary amine groups, which augments the catalysis of retro aldol and C-N bond formation reactions. Moreover, a higher-affinity chelator enables consumption of the Cu(II) template leveraging the differential thermodynamic stability, which allows a controllable lifetime of the vesicular assemblies. Concomitant temporal upregulation of the catalytic reactions could be tuned by the metal ion concentration. This work offers new possibilities for metal ion-mediated dynamic supramolecular systems, opening up a massive repertoire of functionally active dynamic "life-like" materials.
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Affiliation(s)
- Manju Solra
- Materials Research Centre, Division of Chemical Sciences, Indian Institute of Science, C. V. Raman Road, Bangalore, 560012, India
| | - Rohit Kapila
- Materials Research Centre, Division of Chemical Sciences, Indian Institute of Science, C. V. Raman Road, Bangalore, 560012, India
| | - Sourav Das
- Materials Research Centre, Division of Chemical Sciences, Indian Institute of Science, C. V. Raman Road, Bangalore, 560012, India
| | - Preeti Bhatt
- Materials Research Centre, Division of Chemical Sciences, Indian Institute of Science, C. V. Raman Road, Bangalore, 560012, India
| | - Subinoy Rana
- Materials Research Centre, Division of Chemical Sciences, Indian Institute of Science, C. V. Raman Road, Bangalore, 560012, India
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4
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Chen T, Lu Y, Xiong X, Qiu M, Peng Y, Xu Z. Hydrolytic nanozymes: Preparation, properties, and applications. Adv Colloid Interface Sci 2024; 323:103072. [PMID: 38159448 DOI: 10.1016/j.cis.2023.103072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 12/11/2023] [Accepted: 12/19/2023] [Indexed: 01/03/2024]
Abstract
Hydrolytic nanozymes, as promising alternatives to hydrolytic enzymes, can efficiently catalyze the hydrolysis reactions and overcome the operating window limitations of natural enzymes. Moreover, they exhibit several merits such as relatively low cost, easier recovery and reuse, improved operating stability, and adjustable catalytic properties. Consequently, they have found relevance in practical applications such as organic synthesis, chemical weapon degradation, and biosensing. In this review, we highlight recent works addressing the broad topic of the development of hydrolytic nanozymes. We review the preparation, properties, and applications of six types of hydrolytic nanozymes, including AuNP-based nanozymes, polymeric nanozymes, surfactant assemblies, peptide assemblies, metal and metal oxide nanoparticles, and MOFs. Last, we discuss the remaining challenges and future directions. This review will stimulate the development and application of hydrolytic nanozymes.
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Affiliation(s)
- Tianyou Chen
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China.
| | - Yizhuo Lu
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Xiaorong Xiong
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Meishuang Qiu
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Yan Peng
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Zushun Xu
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China.
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5
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Reja A, Pal S, Mahato K, Saha B, Delle Piane M, Pavan GM, Das D. Emergence of Photomodulated Protometabolism by Short Peptide-Based Assemblies. J Am Chem Soc 2023; 145:21114-21121. [PMID: 37708200 DOI: 10.1021/jacs.3c08158] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
In the early Earth, rudimentary enzymes must have utilized the available light energy source to modulate protometabolic processes. Herein, we report the light-responsive C-C bond manipulation via short peptide-based assemblies bound to the photosensitive molecular cofactor (azo-based photoswitch) where the energy of the light source regulated the binding sites which subsequently modulated the retro-aldolase activity. In the presence of a continual source of high-energy photons, temporal realization of a catalytically more proficient state could be achieved under nonequilibrium conditions. Further, the hydrophobic surface of peptide assemblies facilitated the binding of an orthogonal molecular catalyst that showed augmented activity (promiscuous hydrolytic activity) upon binding. This latent activity was utilized for the in situ generation of light-sensitive cofactor that subsequently modulated the retro-aldolase activity, thus creating a reaction network.
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Affiliation(s)
- Antara Reja
- Department of Chemical Sciences and CAFM, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
| | - Sumit Pal
- Department of Chemical Sciences and CAFM, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
| | - Kishalay Mahato
- Department of Chemical Sciences and CAFM, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
| | - Baishakhi Saha
- Department of Chemical Sciences and CAFM, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
| | - Massimo Delle Piane
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129 Torino, Italy
| | - Giovanni M Pavan
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129 Torino, Italy
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Polo Universitario Lugano, Campus Est, Via la Santa 1, 6962 Lugano-Viganello, Switzerland
| | - Dibyendu Das
- Department of Chemical Sciences and CAFM, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
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6
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Hou J, Guo J, Yan T, Liu S, Zang M, Wang L, Xu J, Luo Q, Wang T, Liu J. Light-controlled artificial transmembrane signal transduction for 'ON/OFF'-switchable transphosphorylation of an RNA model substrate. Chem Sci 2023; 14:6039-6044. [PMID: 37293632 PMCID: PMC10246681 DOI: 10.1039/d2sc06701c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 05/09/2023] [Indexed: 06/10/2023] Open
Abstract
Inspired by nature, it is of significant importance to design and construct biomimetic signaling systems to mimic natural signal transduction. Herein, we report an azobenzene/α-cyclodextrin (α-CD)-based signal transduction system with three functional modules: a light-responsive headgroup, lipid-anchored group, pro-catalyst tailgroup. The transducer can be inserted into the vesicular membrane to trigger the transmembrane translocation of molecules under the activation of light, forming a ribonuclease-like effector site and leading to the transphosphorylation of the RNA model substrate inside the vesicles. Moreover, the transphosphorylation process can be reversibly turned 'ON/OFF' over multiple cycles by the activation and deactivation of the pro-catalyst. This artificial photo-controlled signal transduction successfully constructs a signal responsive catalysis system across the membrane to utilize light to reversibly control the internal transphosphorylation process of an RNA model substrate, which might provide a new strategy for future design to utilize exogenous signals for implementing endogenous enzyme manipulation and gene regulation.
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Affiliation(s)
- Jinxing Hou
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University 2699 Qianjin Road Changchun 130012 China
| | - Jiale Guo
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University 2699 Qianjin Road Changchun 130012 China
| | - Tengfei Yan
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University Hangzhou 311121 China
| | - Shengda Liu
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University Hangzhou 311121 China
| | - Mingsong Zang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University 2699 Qianjin Road Changchun 130012 China
| | - Liang Wang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University 2699 Qianjin Road Changchun 130012 China
| | - Jiayun Xu
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University Hangzhou 311121 China
| | - Quan Luo
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University 2699 Qianjin Road Changchun 130012 China
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University Changchun 130012 China
| | - Tingting Wang
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University Hangzhou 311121 China
| | - Junqiu Liu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University 2699 Qianjin Road Changchun 130012 China
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University Hangzhou 311121 China
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7
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Albanese P, Cataldini S, Ren CZJ, Valletti N, Brunetti J, Chen JLY, Rossi F. Light-Switchable Membrane Permeability in Giant Unilamellar Vesicles. Pharmaceutics 2022; 14:2777. [PMID: 36559270 PMCID: PMC9780837 DOI: 10.3390/pharmaceutics14122777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/03/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022] Open
Abstract
In this work, giant unilamellar vesicles (GUVs) were synthesized by blending the natural phospholipid 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) with a photoswitchable amphiphile (1) that undergoes photoisomerization upon irradiation with UV-A (E to Z) and blue (Z to E) light. The mixed vesicles showed marked changes in behavior in response to UV light, including changes in morphology and the opening of pores. The fine control of membrane permeability with consequent cargo release could be attained by modulating either the UV irradiation intensity or the membrane composition. As a proof of concept, the photocontrolled release of sucrose from mixed GUVs is demonstrated using microscopy (phase contrast) and confocal studies. The permeability of the GUVs to sucrose could be increased to ~4 × 10-2 μm/s when the system was illuminated by UV light. With respect to previously reported systems (entirely composed of synthetic amphiphiles), our findings demonstrate the potential of photosensitive GUVs that are mainly composed of natural lipids to be used in medical and biomedical applications, such as targeted drug delivery and localized topical treatments.
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Affiliation(s)
- Paola Albanese
- Department of Earth, Environmental & Physical Sciences, University of Siena, Pian Mantellini 44, 53100 Siena, Italy
| | - Simone Cataldini
- Department of Biotechnology, Chemistry and Pharmaceutical Sciences, University of Siena, Via Aldo Moro, 53100 Siena, Italy
| | - Chloe Z-J Ren
- Centre for Biomedical and Chemical Sciences, School of Science, Auckland University of Technology, Auckland 1142, New Zealand
| | - Nadia Valletti
- Department of Earth, Environmental & Physical Sciences, University of Siena, Pian Mantellini 44, 53100 Siena, Italy
| | - Jlenia Brunetti
- MedBiotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy
| | - Jack L-Y Chen
- Department of Biotechnology, Chemistry and Pharmaceutical Sciences, University of Siena, Via Aldo Moro, 53100 Siena, Italy
- Centre for Biomedical and Chemical Sciences, School of Science, Auckland University of Technology, Auckland 1142, New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, Wellington 6140, New Zealand
| | - Federico Rossi
- Department of Earth, Environmental & Physical Sciences, University of Siena, Pian Mantellini 44, 53100 Siena, Italy
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8
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Das N, Maity C. Switchable aqueous catalytic systems for organic transformations. Commun Chem 2022; 5:115. [PMID: 36697818 PMCID: PMC9814960 DOI: 10.1038/s42004-022-00734-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 09/12/2022] [Indexed: 01/28/2023] Open
Abstract
In living organisms, enzyme catalysis takes place in aqueous media with extraordinary spatiotemporal control and precision. The mechanistic knowledge of enzyme catalysis and related approaches of creating a suitable microenvironment for efficient chemical transformations have been an important source of inspiration for the design of biomimetic artificial catalysts. However, in "nature-like" environments, it has proven difficult for artificial catalysts to promote effective chemical transformations. Besides, control over reaction rate and selectivity are important for smart application purposes. These can be achieved via incorporation of stimuli-responsive features into the structure of smart catalytic systems. Here, we summarize such catalytic systems whose activity can be switched 'on' or 'off' by the application of stimuli in aqueous environments. We describe the switchable catalytic systems capable of performing organic transformations with classification in accordance to the stimulating agent. Switchable catalytic activity in aqueous environments provides new possibilities for the development of smart materials for biomedicine and chemical biology. Moreover, engineering of aqueous catalytic systems can be expected to grow in the coming years with a further broadening of its application to diverse fields.
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Affiliation(s)
- Nikita Das
- Department of Chemistry, School of Advanced Sciences (SAS), Vellore Institute of Technology (VIT), Vellore, 632014, Tamil Nadu, India
| | - Chandan Maity
- Department of Chemistry, School of Advanced Sciences (SAS), Vellore Institute of Technology (VIT), Vellore, 632014, Tamil Nadu, India.
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9
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Ghorbani-Choghamarani A, Taherinia Z. Recent advances utilized in artificial switchable catalysis. RSC Adv 2022; 12:23595-23617. [PMID: 36090388 PMCID: PMC9389550 DOI: 10.1039/d2ra03842k] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 07/30/2022] [Indexed: 11/29/2022] Open
Abstract
Developing "green" catalytic systems with desirable performance such as solubility, recyclability, and switchability is a great challenge. However, inspired by nature, the studies on synthesis and activity of artificial switchable metal catalysts and organocatalysts have become an intense, fervid, and challenging field of research. The peculiarity of these catalysts is that they can be generally triggered in the "on" or "off" states by several external stimuli such as light, heat, solvents, pH change, coordination events or ion influxes, redox processes, mechanical forces, or other changes in reaction conditions. A large number of review articles are available in these areas. However, most efforts are currently focused on the invention of new types of switchable catalysts with different forms of stimuli-response units incorporated within their architectures in order to achieve control over the catalytic activity and regio-, chemo- and stereocontrol of various chemical reactions. Thus, in this review, we begin with a brief introduction to switchable catalysts, followed by discussion of types of stimuli and the influence factors on their activities in the field of biomedical engineering, and catalysis as well as related catalytic mechanisms summarized and discussed. The emphasis is on the recent advances utilized in artificial switchable catalysis.
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Affiliation(s)
- Arash Ghorbani-Choghamarani
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University Hamedan 6517838683 Iran +98 8138380709 +98 8138282807
| | - Zahra Taherinia
- Department of Chemistry, Ilam University P. O. Box 69315516 Ilam Iran
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10
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Liu R, Zhang X, Xia F, Dai Y. Azobenzene-based photoswitchable catalysts: State of the art and perspectives. J Catal 2022. [DOI: 10.1016/j.jcat.2022.03.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Solís‐Muñana P, Salam J, Ren CZ, Carr B, Whitten AE, Warr GG, Chen JL. An Amphiphilic (salen)Co Complex – Utilizing Hydrophobic Interactions to Enhance the Efficiency of a Cooperative Catalyst. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Pablo Solís‐Muñana
- Centre for Biomedical and Chemical Sciences School of Science Auckland University of Technology 34 St Paul St 1010 Auckland New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology 6011 Wellington New Zealand
| | - Joanne Salam
- Centre for Biomedical and Chemical Sciences School of Science Auckland University of Technology 34 St Paul St 1010 Auckland New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology 6011 Wellington New Zealand
| | - Chloe Z.‐J. Ren
- Centre for Biomedical and Chemical Sciences School of Science Auckland University of Technology 34 St Paul St 1010 Auckland New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology 6011 Wellington New Zealand
| | - Bronte Carr
- Centre for Biomedical and Chemical Sciences School of Science Auckland University of Technology 34 St Paul St 1010 Auckland New Zealand
| | - Andrew E. Whitten
- Australian Nuclear Science and Technology Organisation (ANSTO) New Illawarra Rd 2234 Lucas Heights, NSW Australia
| | - Gregory G. Warr
- School of Chemistry The University of Sydney 2006 Sydney New South Wales Australia
| | - Jack L.‐Y. Chen
- Centre for Biomedical and Chemical Sciences School of Science Auckland University of Technology 34 St Paul St 1010 Auckland New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology 6011 Wellington New Zealand
- Department of Biotechnology, Chemistry and Pharmaceutical Sciences Università degli Studi di Siena Via Aldo Moro 53100 Siena Italy
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12
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Wang Z, Li X, Chen S, Dong J. Fabrication of Soft-Oxometalates {Mo 132} Clusters With Novel Azobenzene Surfactants: Size Control by Micelles and Light. Front Chem 2021; 9:625077. [PMID: 33681144 PMCID: PMC7928308 DOI: 10.3389/fchem.2021.625077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 01/08/2021] [Indexed: 11/23/2022] Open
Abstract
Soft-oxometalates (SOMs) are colloid suspensions of superstructured assemblies of polyoxometalates (POMs) and are found to be very effective photo-catalysts in a number of chemical reactions. The stabilization of SOMs generally requires legends or stabilizers, e.g., polymers and surfactants. In this paper, a light responsive azobenzene surfactant, C10AZOC2N3, was developed and used to stable {Mo132} SOMs. Various techniques such as Dynamic light scattering, TEM, UV-Vis spectra and cyclic voltammetry were employed to characterize the experimental results. The outstanding structure-directing effect of surfactant self-assembly micelles in solution on inorganic counter-anions was demonstrated. Different amount of cyclohexane was solubilized into C10AZOC2N3 micelles to successfully control the size of {Mo132} SOMs cluster. Furthermore, the clusters exposed to UV light for a certain time can be served as a second trigger to control the size of SOMs due to the trans-cis conformation transition of surfactant molecules. The redox potentials of C10AZOC2N3-{Mo132} SOMs were investigated as the cluster size varied. Interestingly, the redox potential of {Mo132} was not affected by the cluster size, indicating that the presence of surfactant did not change the main function of {Mo132} as an electrochemical catalyst, but merely assisted in the size control of SOM aggregation.
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Affiliation(s)
- Zhe Wang
- Engineering Research Center of Organosilicon Compounds and Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, China
| | - Xuefeng Li
- Engineering Research Center of Organosilicon Compounds and Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, China
| | - Shengli Chen
- Engineering Research Center of Organosilicon Compounds and Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, China
| | - Jinfeng Dong
- Engineering Research Center of Organosilicon Compounds and Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, China
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13
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Goswami A, Gaikwad S, Schmittel M. A Switchable Catalyst Duo for Acyl Transfer Proximity Catalysis and Regulation of Substrate Selectivity. Chemistry 2021; 27:2997-3001. [PMID: 33022776 PMCID: PMC7898682 DOI: 10.1002/chem.202004416] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Indexed: 12/15/2022]
Abstract
Enzymes are encoded with a gamut of information to catalyze a highly selective transformation by selecting the proper reactants from an intricate mixture of constituents. Mimicking biological machinery, two switchable catalysts with differently sized cavities and allosteric control are conceived that allow complementary size-selective acyl transfer in an on/off manner by modulating the effective local concentration of the substrates. Selective activation of one of two catalysts in a mixture of reactants of similar reactivity enabled upregulation of the desired product.
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Affiliation(s)
- Abir Goswami
- Center of Micro and Nanochemistry and Engineering, Organische Chemie IUniversity of SiegenAdolf-Reichwein Str. 257068SiegenGermany
| | - Sudhakar Gaikwad
- Center of Micro and Nanochemistry and Engineering, Organische Chemie IUniversity of SiegenAdolf-Reichwein Str. 257068SiegenGermany
| | - Michael Schmittel
- Center of Micro and Nanochemistry and Engineering, Organische Chemie IUniversity of SiegenAdolf-Reichwein Str. 257068SiegenGermany
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14
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Kahlon NK, Weber CC. Micellar Catalysis and Reactivity in Nanostructured Ionic Liquids: Two Sides of the Same Coin? Aust J Chem 2021. [DOI: 10.1071/ch21109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Ludwig J, Helberg J, Zipse H, Herges R. Azo-dimethylaminopyridine-functionalized Ni(II)-porphyrin as a photoswitchable nucleophilic catalyst. Beilstein J Org Chem 2020; 16:2119-2126. [PMID: 32952728 PMCID: PMC7476594 DOI: 10.3762/bjoc.16.179] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 08/21/2020] [Indexed: 12/24/2022] Open
Abstract
We present the synthesis and the photochemical and catalytic switching properties of an azopyridine as a photoswitchable ligand, covalently attached to a Ni(II)-porphyrin. Upon irradiation with 530 nm (green light), the azopyridine switches to the cis configuration and coordinates with the Ni2+ ion. Light of 435 nm (violet) isomerizes the ligand back to the trans configuration, which decoordinates for steric reasons. This so-called record player design has been used previously to switch the spin state of Ni2+ between singlet and triplet. We now use the coordination/decoordination process to switch the catalytic activity of the dimethylaminopyridine (DMAP) unit. DMAP is a known catalyst in the nitroaldol (Henry) reaction. Upon coordination to the Ni2+ ion, the basicity of the pyridine lone pair is attenuated and hence the catalytic activity is reduced. Decoordination restores the catalytic activity. The rate constants in the two switching states differ by a factor of 2.2, and the catalytic switching is reversible.
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Affiliation(s)
- Jannis Ludwig
- Otto Diels Institute of Organic Chemistry, University of Kiel, Otto-Hahn-Platz 3-4, Kiel D-24098, Germany
| | - Julian Helberg
- Department of Chemistry, Ludwig-Maximilians-Universitaet Muenchen, Butenandtstrasse 5–13, 81377 Muenchen, Germany
| | - Hendrik Zipse
- Department of Chemistry, Ludwig-Maximilians-Universitaet Muenchen, Butenandtstrasse 5–13, 81377 Muenchen, Germany
| | - Rainer Herges
- Otto Diels Institute of Organic Chemistry, University of Kiel, Otto-Hahn-Platz 3-4, Kiel D-24098, Germany
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16
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Ren CZJ, Solís-Muñana P, Warr GG, Chen JLY. Dynamic and Modular Formation of a Synergistic Transphosphorylation Catalyst. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01321] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Chloe Z.-J. Ren
- Centre for Biomedical and Chemical Sciences, School of Science, Auckland University of Technology, Auckland 1010, New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, Wellington 6140, New Zealand
| | - Pablo Solís-Muñana
- Centre for Biomedical and Chemical Sciences, School of Science, Auckland University of Technology, Auckland 1010, New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, Wellington 6140, New Zealand
| | - Gregory G. Warr
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Jack L.-Y. Chen
- Centre for Biomedical and Chemical Sciences, School of Science, Auckland University of Technology, Auckland 1010, New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, Wellington 6140, New Zealand
- Department of Biotechnology, Chemistry and Pharmaceutical Sciences, Università degli Studi di Siena, 53100 Siena, Italy
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17
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Solà J, Jimeno C, Alfonso I. Exploiting complexity to implement function in chemical systems. Chem Commun (Camb) 2020; 56:13273-13286. [DOI: 10.1039/d0cc04170j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This feature article reflects a personal overview of the importance of complexity as an additional parameter to be considered in chemical research, being illustrated with selected examples in molecular recognition and catalysis.
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Affiliation(s)
- Jordi Solà
- Department of Biological Chemistry
- Institute of Advanced Chemistry of Catalonia
- IQAC-CSIC
- 08034 Barcelona
- Spain
| | - Ciril Jimeno
- Department of Biological Chemistry
- Institute of Advanced Chemistry of Catalonia
- IQAC-CSIC
- 08034 Barcelona
- Spain
| | - Ignacio Alfonso
- Department of Biological Chemistry
- Institute of Advanced Chemistry of Catalonia
- IQAC-CSIC
- 08034 Barcelona
- Spain
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