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Chakraborty S, Kolay S, Maity S, Patra A. Copper Nanoclusters as Multienzymes Mimic Activities of Oxidase and Ascorbic Acid Oxidase in the Presence of Imidazole. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:317-324. [PMID: 38103254 DOI: 10.1021/acs.langmuir.3c02570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Artificial nanoenzymes based on metal nanoclusters have received great attention for multienzyme activities nowadays. In this work, pepsin-capped copper NCs (Cu-Pep NCs) are used as oxidase, ascorbic acid oxidase (AAO), and peroxidase mimics, and their activities are enhanced by the introduction of imidazole. The oxidase activity increased almost 7.5-fold, while 5-fold and 2-fold increases were observed for the peroxidase and AAO-like activity, respectively. The enhanced radical formation in the presence of imidazole moieties facilitates the enzymatic activity of the Cu-Pep-NCs/Imid system. This work describes the different enzymatic activities of the NCs, paving a new way for artificial nanoenzymes having enhanced activities.
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Affiliation(s)
- Sikta Chakraborty
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Sarita Kolay
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Subarna Maity
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Amitava Patra
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
- Institute of Nano Science and Technology, Knowledge City, Sector 81, Mohali 140306, India
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Bera D, Baruah M, Dehury AK, Samanta A, Chaudhary YS, Goswami N. Depletion Driven Assembly of Ultrasmall Metal Nanoclusters: From Kinetically Arrested Assemblies to Thermodynamically Stable, Spherical Superclusters. J Phys Chem Lett 2022; 13:9411-9421. [PMID: 36191241 DOI: 10.1021/acs.jpclett.2c02420] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Nanoscale assembly of ultrasmall metal nanoclusters (MNCs) by means of molecular forces has proven to be a powerful strategy to engineer their molecule-like properties in multiscale dimensions. By leveraging depletion attraction as the guiding force, herein, we demonstrate the formation of kinetically trapped NCs assemblies with enhanced photoluminescence (PL) and excited state lifetimes and extend the principle to cluster impregnated cationic nanogels, nonluminescent Au(I)-thiolate complexes, and weakly luminescent CuNCs. We further demonstrate a thermal energy driven kinetic barrier breaking process to isolate these assemblies. These isolated assemblies are thermodynamically stable, built from a strong network among several discrete, ultrasmall AuNCs and exhibit several unusual properties such as high stability in various pH, strong PL, microsecond lifetimes, large Stocks shifts, and higher accumulation in the lysosome of cancer cells. We anticipate our strategy may find wider use in creating a large variety of MNC-based assemblies with many unforeseen arrangements, properties, and applications.
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Affiliation(s)
- Debkumar Bera
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Acharya Vihar, Bhubaneswar 751013, India
- Academy of Scientific & Innovative Research, Ghaziabad 201 002, India
| | - Mousumi Baruah
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, NH 91, Tehsil Dadri, Gautam Buddha Nagar, Uttar Pradesh 201314, India
| | - Asish K Dehury
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Acharya Vihar, Bhubaneswar 751013, India
- Academy of Scientific & Innovative Research, Ghaziabad 201 002, India
| | - Animesh Samanta
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, NH 91, Tehsil Dadri, Gautam Buddha Nagar, Uttar Pradesh 201314, India
| | - Yatendra S Chaudhary
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Acharya Vihar, Bhubaneswar 751013, India
- Academy of Scientific & Innovative Research, Ghaziabad 201 002, India
| | - Nirmal Goswami
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Acharya Vihar, Bhubaneswar 751013, India
- Academy of Scientific & Innovative Research, Ghaziabad 201 002, India
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Maity S, Kolay S, Ghosh S, Chakraborty S, Bain D, Patra A. Unraveling the Effect of Single Atom Doping on the Carrier Relaxation Dynamics of MAg 24n- Nanoclusters. J Phys Chem Lett 2022; 13:5581-5588. [PMID: 35698791 DOI: 10.1021/acs.jpclett.2c01333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Precisely doped metal nanoclusters (NCs) are currently emerging nanomaterials for their unique photophysical properties. Here, we report the influence of single atom doping on the excited state relaxation dynamics of a series of MAg24(2,4-Me2PhS)18n- NCs where M is Ag, Au, Pd, and Pt. The NCs with a group 11 metal (Ag and Au) as central atoms exhibit dual emission at NIR and visible range, whereas it shows only NIR emission for group 10 metal (Pd and Pt) doped NCs. Global target analyses of transient absorption (TA) data reveal the three-state relaxation, i.e., initially excited state (Sn), ligand-centered charge transfer (CT) state (SL), and metal-centered lowest excited state (S1). Apart from the HOMO-LUMO (H-L) energy gap, the electron affinity of the central metal atom and rigidity of the NC structural framework influence the relaxation processes of the NCs. The extensive study into the relaxation dynamics will bestow the single atomic level modulation of photophysical properties.
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Affiliation(s)
- Subarna Maity
- School of Materials Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Sarita Kolay
- School of Materials Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Srijon Ghosh
- School of Materials Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Sikta Chakraborty
- School of Materials Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Dipankar Bain
- Institute of Nano Science and Technology, Sector 81, Sahibzada Ajit Singh Nagar, Mohali, Punjab 140306, India
| | - Amitava Patra
- School of Materials Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
- Institute of Nano Science and Technology, Sector 81, Sahibzada Ajit Singh Nagar, Mohali, Punjab 140306, India
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Kolay S, Bain D, Maity S, Devi A, Patra A, Antoine R. Self-Assembled Metal Nanoclusters: Driving Forces and Structural Correlation with Optical Properties. NANOMATERIALS 2022; 12:nano12030544. [PMID: 35159891 PMCID: PMC8838213 DOI: 10.3390/nano12030544] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 01/31/2022] [Accepted: 02/02/2022] [Indexed: 02/05/2023]
Abstract
Studies on self-assembly of metal nanoclusters (MNCs) are an emerging field of research owing to their significant optical properties and potential applications in many areas. Fabricating the desired self-assembly structure for specific implementation has always been challenging in nanotechnology. The building blocks organize themselves into a hierarchical structure with a high order of directional control in the self-assembly process. An overview of the recent achievements in the self-assembly chemistry of MNCs is summarized in this review article. Here, we investigate the underlying mechanism for the self-assembly structures, and analysis reveals that van der Waals forces, electrostatic interaction, metallophilic interaction, and amphiphilicity are the crucial parameters. In addition, we discuss the principles of template-mediated interaction and the effect of external stimuli on assembly formation in detail. We also focus on the structural correlation of the assemblies with their photophysical properties. A deep perception of the self-assembly mechanism and the degree of interactions on the excited state dynamics is provided for the future synthesis of customizable MNCs with promising applications.
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Affiliation(s)
- Sarita Kolay
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India; (S.K.); (S.M.)
| | - Dipankar Bain
- Energy and Environment Unit, Institute of Nano Science and Technology, Knowledge City, Sector 81, Mohali 140306, India; (D.B.); (A.D.)
| | - Subarna Maity
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India; (S.K.); (S.M.)
| | - Aarti Devi
- Energy and Environment Unit, Institute of Nano Science and Technology, Knowledge City, Sector 81, Mohali 140306, India; (D.B.); (A.D.)
| | - Amitava Patra
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India; (S.K.); (S.M.)
- Energy and Environment Unit, Institute of Nano Science and Technology, Knowledge City, Sector 81, Mohali 140306, India; (D.B.); (A.D.)
- Correspondence: (A.P.); (R.A.)
| | - Rodolphe Antoine
- CNRS, Institut Lumière Matière UMR 5306, Univ Lyon, Université Claude Bernard Lyon 1, F-69100 Villeurbanne, France
- Correspondence: (A.P.); (R.A.)
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