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Pan N, Roy L, Hasan MN, Banerjee A, Ghosh R, Alsharif MA, Asghar BH, Obaid RJ, Chattopadhyay A, Das R, Ahmed SA, Pal SK. Unraveling an Ultrafast Electron Transport Mechanism in a Photocatalytic "Micromachine" for Their Potential Light Harvesting Applications. MICROMACHINES 2023; 14:mi14050980. [PMID: 37241604 DOI: 10.3390/mi14050980] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/28/2023] [Accepted: 04/28/2023] [Indexed: 05/28/2023]
Abstract
Following the seminal discovery of Richard Feynman, several micromachines have been made that are capable of several applications, such as solar energy harvesting, remediation of environmental pollution, etc. Here we have synthesized a nanohybrid combining TiO2 nanoparticle and light harvesting robust organic molecule RK1 (2-cyano-3-(4-(7-(5-(4-(diphenylamino)phenyl)-4-octylthiophen-2-yl)benzo[c][1,2,5] thiadiazol-4-yl)phenyl) acrylic acid) as a model micromachine having solar light harvesting ability potential for application in photocatalysis, preparation of solar active devices, etc. Detailed structural characterization, including High Resolution Transmission Electronic Microscopy (HRTEM) and Fourier-transform infrared spectroscopy (FTIR), has been performed on the nanohybrid. We have studied the excited-state ultrafast dynamics of the efficient push-pull dye RK1 in solution, on mesoporous semiconductor nanoparticles, and in insulator nanoparticles by streak camera (resolution of the order of 500 fs). The dynamics of such photosensitizers in polar solvents have been reported, and it has been observed that completely different dynamics occur when they are attached to the surface of the semiconductor/insulator nanosurface. A femtosecond-resolved fast electron transfer has been reported when photosensitizer RK1 has been attached to the surface of the semiconductor nanoparticle, which in turn plays a crucial role in the development of an efficient light harvesting material. The generation of reactive oxygen species as a result of femtosecond-resolved photoinduced electron injection in the aqueous medium is also investigated in order to explore the possibility of redox-active micromachines, which are found to be crucial for efficient and enhanced photocatalysis.
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Affiliation(s)
- Nivedita Pan
- Department of Chemical and Biological Sciences, S.N. Bose National Centre for Basic Sciences, Salt Lake, Block JD, Sector 3, Kolkata 700106, India
| | - Lopamudra Roy
- Department of Applied Optics and Photonics, University of Calcutta, 92, Acharya Prafulla Chandra Rd, Machuabazar, Kolkata 700009, India
| | - Md Nur Hasan
- Department of Chemical and Biological Sciences, S.N. Bose National Centre for Basic Sciences, Salt Lake, Block JD, Sector 3, Kolkata 700106, India
| | - Amrita Banerjee
- Department of Physics, Jadavpur University, 188, Raja S.C. Mallick Rd, Kolkata 700032, India
| | - Ria Ghosh
- Department of Chemical and Biological Sciences, S.N. Bose National Centre for Basic Sciences, Salt Lake, Block JD, Sector 3, Kolkata 700106, India
| | - Meshari A Alsharif
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Basim H Asghar
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Rami J Obaid
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Arpita Chattopadhyay
- Department of Basic Science and Humanities, Techno International New Town, Block-DG 1/2 New Town, Action Area 1, Kolkata 700156, India
| | - Ranjan Das
- Department of Chemistry, West Bengal State University, Barasat, North 24 Parganas, Kolkata 700126, India
| | - Saleh A Ahmed
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
- Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Samir Kumar Pal
- Department of Chemical and Biological Sciences, S.N. Bose National Centre for Basic Sciences, Salt Lake, Block JD, Sector 3, Kolkata 700106, India
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Sharma P, Naithani S, Layek S, Kumar A, Rawat R, Kaja S, Nag A, Kumar S, Goswami T. Development of low-cost copper nanoclusters for highly selective "turn-on" sensing of Hg 2+ ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 297:122697. [PMID: 37071963 DOI: 10.1016/j.saa.2023.122697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 03/29/2023] [Accepted: 03/31/2023] [Indexed: 05/03/2023]
Abstract
The development of low-cost earth abundant metal based fluorescent sensors for a rapid and selective nanomolar level detection of Hg2+ is essential due to the increasing world-wide concern of its detrimental effect on humans as well as the environment. Herein, we present a perylene tetracarboxylic acid functionalized copper nanoclusters (CuNCs) based "turn-on" fluorescence probe for highly selective detection of toxic Hg2+ ions. The fabricated CuNCs exhibited high photostability with emission maximum centered at 532 nm (λex = 480 nm). The fluorescence intensity of CuNCs was remarkably enhanced upon the addition of Hg2+ over other competing ions and neutral analytes. Notably, the 'turn-on' fluorescence response exhibits highly sensitive detection limit as low as 15.9 nM (S/N ∼ 3). The time resolved fluorescence spectroscopy suggested the energy transfer between CuNCs and Hg2+ ions following either inhibited fluorescence resonance energy transfer (FRET) or surface modification of CuNCs during Hg2+ sensing. This study offers the systematic design and development of new fluorescent 'turn-on' nanoprobes for rapid and selective recognition of heavy metal ions.
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Affiliation(s)
- Pooja Sharma
- Department of Chemistry, Applied Sciences Cluster, University of Petroleum & Energy Studies (UPES), Energy Acres Building, Dehradun 248007, Uttarakhand, India
| | - Sudhanshu Naithani
- Department of Chemistry, Applied Sciences Cluster, University of Petroleum & Energy Studies (UPES), Energy Acres Building, Dehradun 248007, Uttarakhand, India
| | - Samar Layek
- Department of Physics, Applied Sciences Cluster, University of Petroleum & Energy Studies (UPES), Energy Acres Building, Dehradun 248007, Uttarakhand, India
| | - Amit Kumar
- Department of Chemistry, Applied Sciences Cluster, University of Petroleum & Energy Studies (UPES), Energy Acres Building, Dehradun 248007, Uttarakhand, India
| | - Reema Rawat
- School of Health Sciences and Technology, University of Petroleum and Energy Studies, Dehradun 248007, India
| | - Sravani Kaja
- Department of Chemistry, BITS Pilani, Hyderabad 5000078, India
| | - Amit Nag
- Department of Chemistry, BITS Pilani, Hyderabad 5000078, India
| | - Sushil Kumar
- Department of Chemistry, Applied Sciences Cluster, University of Petroleum & Energy Studies (UPES), Energy Acres Building, Dehradun 248007, Uttarakhand, India.
| | - Tapas Goswami
- Department of Chemistry, Applied Sciences Cluster, University of Petroleum & Energy Studies (UPES), Energy Acres Building, Dehradun 248007, Uttarakhand, India.
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Possetto D, Gambetta C, Gatica E, Montaña MP, Porcal GV, Massad W, Natera J. Photocatalytic evaluation and characterization of TiO2-riboflavin phosphate film: analysis of reactive oxygen species. Photochem Photobiol Sci 2022; 22:513-524. [PMID: 36308632 DOI: 10.1007/s43630-022-00331-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 10/20/2022] [Indexed: 04/18/2023]
Abstract
The effect of Riboflavin-5'-phosphate (RFPO4) sensitization on photocatalytic properties of TiO2 film was studied. RFPO4 was adsorbed on film surface to investigate the photophysical properties of TiO2 upon blue-light photoexcitation. The film was characterized through scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, thermogravimetric analysis, and diffuse reflectance spectroscopy. The efficiency of the TiO2/RFPO4 film was tested for pollutant elimination in aqueous media in a visible-light-driven system. The phenol paradigmatic model was employed in an aqueous solution as a contaminant target. TiO2/RFPO4 sensitized photodegradation of phenol, which produces catechol, hydroquinone, and benzophenone, was monitored by absorption spectroscopy and HPLC. The results indicated that phenol degradation with TiO2/RFPO4 film was due to the photogeneration of two reactive oxygen species, singlet molecular oxygen (O2(1Δg)) and superoxide radical anion (O2·-) identified through specific detection techniques. The presence of O2(1Δg) is reported here for the first time as generated from a sensitized TiO2 film upon visible-light photoirradiation. Based on the photophysical determinations, a photocatalytic mechanism for TiO2/RFPO4 was established.
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Fabrication of nanohybrids toward improving therapeutic potential of a NIR photo-sensitizer: An optical spectroscopic and computational study. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113610] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Bera A, Hasan MN, Chatterjee A, Mukherjee D, Pal SK. Dual Sensitization via Electron and Energy Harvesting in a Nanohybrid for Improvement of Therapeutic Efficacy. ACS PHYSICAL CHEMISTRY AU 2021; 2:171-178. [PMID: 36855571 PMCID: PMC9718314 DOI: 10.1021/acsphyschemau.1c00033] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We demonstrate experimental evidence of the effect of surface plasmon resonance of noble metal nanoparticles (NPs) on the activity of a well-known biomedicinal drug in the proximity of a semiconductor having a wide band gap for enhanced photodynamic therapy (PDT) efficacy. We have chosen riboflavin (Rf) (or vitamin B2) as a model photosensitizer, attached with ZnO NPs and further attached with gold (Au) NP-decorated ZnO to increase the efficiency. The synthesized nanohybrids are characterized with the help of different microscopic, optical spectroscopic, and density functional theory (DFT)-based techniques. The DFT and time-dependent DFT-based calculations validate the experimental findings. A detailed ultrafast spectroscopic study has been carried out further to study the excited-state charge dynamics in the interface of the nanohybrids. The occurrence of a Förster resonance energy transfer (FRET) between Rf and Au has been found to be the key reason for the increased efficiency in the Rf-ZnO-Au nanohybrid over the Rf-ZnO one. The dipolar coupling between Au and Rf in the Rf-ZnO-Au nanohybrid further facilitates the generation of reactive oxygen species (ROS) in comparison to Rf-ZnO under blue-light irradiation. The greater efficiency in ROS generation by the Rf-ZnO-Au nanohybrid has been utilized for antimicrobial action against methicillin-resistant S. aureus (MRSA). Overall, the present study highlights the dual sensitization for achieving enhanced electron injection efficiency in the Rf-ZnO-Au nanohybrid in order to use it as an antibacterial agent that could be translated in PDT.
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Ahmed SA, Hasan MN, Bagchi D, Altass HM, Morad M, Jassas RS, Hameed AM, Patwari J, Alessa H, Alharbi A, Pal SK. Combating Essential Metal Toxicity: Key Information from Optical Spectroscopy. ACS OMEGA 2020; 5:15666-15672. [PMID: 32637841 PMCID: PMC7331209 DOI: 10.1021/acsomega.0c01898] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 06/01/2020] [Indexed: 05/11/2023]
Abstract
Chelation therapy is one of the most effective and widely accepted methods of treatment to reduce metal toxicity caused by an excess amount of essential metals. Essential minerals play an important role in maintaining healthy human physiology. However, the presence of an excess amount of such essential metals can cause cell injury, which finally leads to severe life-threatening diseases. Chelating complexes can efficiently capture the targeted metal and can easily be excreted from the body. Commonly utilized metal chelators have major side effects including long-term damage to some organs, which has pointed out the need of less harmful biocompatible chelating agents. In this work, we have investigated the iron chelating property of curcumin through various spectroscopic tools by synthesizing and characterizing the iron-curcumin (Fe-Cur) complex. We have also investigated whether the synthesized materials are able to retain their antioxidant activity after the chelation of a substantial amount of metal ion. Our study unravels the improved antioxidant activity of the synthesized chelate complex. We further demonstrate that the proposed complex generates no significant reactive oxygen species (ROS) under dark conditions, which makes it a promising candidate for chelation therapy of iron toxicity. Femtosecond-resolved fluorescence studies further provide insight into the mechanism of activity of the new complex where electron transfer from ligand to metal has been observed prominently. Thus, the Fe-Cur complex has a potential to act as a dual activity medicine for excretion of toxic metal ions via chelation and as a therapeutic agent of oxidative stress caused by the metal ion as well.
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Affiliation(s)
- Saleh A. Ahmed
- Chemistry
Department, Faculty of Applied Science, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
- Chemistry
Department, Faculty of Science, Assiut University, 71516 Assiut, Egypt
| | - Md. Nur Hasan
- Department
of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector-III, Salt Lake, Kolkata 700106, India
| | - Damayanti Bagchi
- Department
of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector-III, Salt Lake, Kolkata 700106, India
| | - Hatem M. Altass
- Chemistry
Department, Faculty of Applied Science, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
| | - Moataz Morad
- Chemistry
Department, Faculty of Applied Science, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
| | - Rabab S. Jassas
- Department
of Chemistry, Jamoum University College, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
| | - Ahmed M. Hameed
- Chemistry
Department, Faculty of Applied Science, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
| | - Jayita Patwari
- Department
of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector-III, Salt Lake, Kolkata 700106, India
| | - Hussain Alessa
- Chemistry
Department, Faculty of Applied Science, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
| | - Ahmed Alharbi
- Chemistry
Department, Faculty of Applied Science, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
| | - Samir Kumar Pal
- Department
of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector-III, Salt Lake, Kolkata 700106, India
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Nag S, Bagchi D, Chattopadhyay D, Bhattacharyya M, Pal SK. Protein assembled nano-vehicle entrapping photosensitizer molecules for efficient lung carcinoma therapy. Int J Pharm 2020; 580:119192. [PMID: 32126250 DOI: 10.1016/j.ijpharm.2020.119192] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 02/10/2020] [Accepted: 02/28/2020] [Indexed: 01/10/2023]
Abstract
The efficiency of drug depends not only on its potency but also on its ability to reach the target sites in preference to non-target sites. In this regard, protein assembled nanocarrier is the most promising strategy for intracellular anti-cancer drug delivery. The key motive of this study is to fabricate biocompatible protein assembled nanocarrier conjugated photosensitizer system for stimuli-responsive treatment of lung carcinoma. Here, we have synthesized a unique nanohybrid of protein assembled gold nanoparticles (AuNPs), attaching a model photosensitizer, Protoporphyrin IX (PpIX) to the protein shell of the nanoparticles (NPs) imparting an ideal drug-carrier nature. Photo-induced alteration in hydrodynamic diameter suggests structural perturbation of the nanohybrid which in terms signifies on-demand drug delivery. The drug release profile has been further confirmed by using steady-state fluorescence experiments. AuNP-PpIX showed excellent anti-cancer efficiency upon green light irradiation on lung adenocarcinoma cell line (A549) through intracellular reactive oxygen species (ROS) generation. The cellular morphological changes upon PDT and internalization of nanohybrid were monitored using confocal laser scanning microscope. This anti-cancer effect of nanohybrid was associated with apoptotic pathway which was confirmed in the flow cytometric platform. The developed nanomedicine is expected to find relevance in clinical anti-cancer PDT models in the near future.
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Affiliation(s)
- Sudip Nag
- Department of Biochemistry, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700019, India
| | - Damayanti Bagchi
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700106, India
| | | | - Maitree Bhattacharyya
- Department of Biochemistry, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700019, India; Jagadis Bose National Science Talent Search, 1300 Rajdanga Main Road, Kolkata 700107, India.
| | - Samir Kumar Pal
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700106, India.
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Roy L, Halder A, Singh S, Patwari J, Singh P, Bhattacharya K, Mondal S, Pal SK. Spectroscopy of an intrinsic fluorophore in animal and plant milk for potential identification of their quality. J Dairy Sci 2020; 103:1366-1376. [DOI: 10.3168/jds.2019-17034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 10/07/2019] [Indexed: 11/19/2022]
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Ahmed SA, Bagchi D, Katouah HA, Hasan MN, Altass HM, Pal SK. Enhanced Water Stability and Photoresponsivity in Metal-Organic Framework (MOF): A Potential Tool to Combat Drug-resistant Bacteria. Sci Rep 2019; 9:19372. [PMID: 31852949 PMCID: PMC6920456 DOI: 10.1038/s41598-019-55542-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 11/21/2019] [Indexed: 12/12/2022] Open
Abstract
In this work, we have successfully synthesized a bimetallic (Zinc and Cobalt) Zeolitic Imidazolate Framework (Zn50Co50-ZIF), a class in a wider microporous Metal-Organic Framework (MOF) family. The synthesized nanostructures maintain both water stability like ZIF-8 (solely Zn containing) and charge transfer electronic band in the visible optical spectrum as ZIF-67 (solely Co containing). Crystal structure from XRD, high resolution transmission electron microscopy (HRTEM) followed by elemental mapping (EDAX) confirm structural stability and omnipresence of the metal atoms (Zn and Co) across the nanomaterial with equal proportion. Existence of charge transfer state consistent with ZIF67 and intact ultrafast excited state dynamics of the imidazolate moiety in both ZIF-8 and ZIF-67, is evidenced from steady state and time resolved optical spectroscopy. The thermal and aqueous stabilities of Zn50Co50-ZIF are found to be better than ZIF-67 but comparable to ZIF-8 as evidenced by solubility, scanning electron microscopy (SEM) and XRD studies of the material in water. We have evaluated the photoinduced ROS generation by the mixed ZIF employing dichloro-dihydro-fluorescein diacetate (DCFH-DA) assay. We have also explored the potentiality of the synthesized material for the alternate remediation of methicillin resistant Staphylococcus aureus (MRSA) infection through the photoinduced reactive oxygen species (ROS) generation and methylene blue (MB) degradation kinetics.
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Affiliation(s)
- Saleh A Ahmed
- Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University, 21955, Makkah, Saudi Arabia.
- Chemistry Department, Faculty of Science, Assiut University, 71516, Assiut, Egypt.
| | - Damayanti Bagchi
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, SaltLake, Kolkata, 700 106, India
| | - Hanadi A Katouah
- Chemistry Department, Faculty of Science, Assiut University, 71516, Assiut, Egypt
| | - Md Nur Hasan
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, SaltLake, Kolkata, 700 106, India
| | - Hatem M Altass
- Chemistry Department, Faculty of Science, Assiut University, 71516, Assiut, Egypt
| | - Samir Kumar Pal
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, SaltLake, Kolkata, 700 106, India.
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Bagchi D, Halder A, Debnath S, Saha P, Kumar Pal S. Exploration of interfacial dynamics in squaraine based nanohybrids for potential photodynamic action. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.05.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bagchi D, Rathnam VSS, Lemmens P, Banerjee I, Pal SK. NIR-Light-Active ZnO-Based Nanohybrids for Bacterial Biofilm Treatment. ACS OMEGA 2018; 3:10877-10885. [PMID: 30320255 PMCID: PMC6173506 DOI: 10.1021/acsomega.8b00716] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Accepted: 07/10/2018] [Indexed: 05/28/2023]
Abstract
Nanomaterials with antimicrobial properties triggered by external stimuli appear to be a promising and innovative substitute for the destruction of antibiotic-resistant superbugs as they can induce multiple disruptions in the cellular mechanism. This study demonstrates the use of squaraine (SQ) dye as the photosensitive material, activated in the near-infrared tissue-transparent therapeutic window. The dye has been covalently attached to the ZnO nanoparticle surface, forming ZnO-SQ nanohybrids. The formation of the nanohybrids is confirmed using Fourier transform infrared and other optical spectroscopic methods. The photoinduced interfacial electron transfer process (as confirmed using the time-resolved fluorescence technique) from the excited state of SQ to the conduction band of ZnO is responsible for the greater reactive oxygen species (ROS) generation ability of the nanohybrid. The production of photoactivated ROS (especially singlet oxygen species) by ZnO-SQ provides remarkable antimicrobial action against clinically significant Staphylococcus aureus. Detailed investigations suggest synergistic involvement of cell membrane disruption and nanoparticle internalization followed by photoinduced intracellular ROS generation, which result in an unprecedented 95% bacterial killing activity by the nanohybrid. Moreover, the efficacy of the nanohybrid for disruption of bacterial biofilms has been examined. The electron microscopic images suggest significant bacterial cell death following structural alteration and reduced adherence property of the biofilms. Nanodimension-driven greater internalization of ZnO-SQ followed by an improved dissolution of ZnO in an acidic environment of the biofilm as well as red-light-driven interfacial charge separation and ROS generation improves the efficacy of the material for biofilm destruction. An artificial medical implant mimicking titanium sheets coated with ZnO-SQ depicts light-triggered disruption in the adherence property of matured biofilms. The cytotoxicity and hemolysis assays show inherent biocompatibility of the photoactive nanohybrid. This study is notably promising for the treatment of life-threatening drug-resistant infections and eradication of biofilms formed within artificial implants.
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Affiliation(s)
- Damayanti Bagchi
- Department
of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700106, India
| | - V. S. Sharan Rathnam
- Department
of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Peter Lemmens
- Institute
for Condensed Matter Physics and Laboratory for Emerging Nanometrology, TU Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig, Germany
| | - Indranil Banerjee
- Department
of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Samir Kumar Pal
- Department
of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700106, India
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Bagchi D, Maji TK, Sardar S, Lemmens P, Bhattacharya C, Karmakar D, Pal SK. Sensitized ZnO nanorod assemblies to detect heavy metal contaminated phytomedicines: spectroscopic and simulation studies. Phys Chem Chem Phys 2018; 19:2503-2513. [PMID: 28058420 DOI: 10.1039/c6cp08016b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The immense pharmacological relevance of the herbal medicine curcumin including anti-cancer and anti-Alzheimer effects, suggests it to be a superior alternative to synthesised drugs. The diverse functionalities with minimal side effects intensify the use of curcumin not only as a dietary supplement but also as a therapeutic agent. Besides all this effectiveness, some recent literature reported the presence of deleterious heavy metal contaminants from various sources in curcumin leading to potential health hazards. In this regard, we attempt to fabricate ZnO based nanoprobes to detect metal conjugated curcumin. We have synthesized and structurally characterized the ZnO nanorods (NR). Three samples namely curcumin (pure), Zn-curcumin (non-toxic metal attached to curcumin) and Hg-curcumin (toxic heavy metal attached to curcumin) were prepared for consideration. The samples were electrochemically deposited onto ZnO surfaces and the attachment was confirmed by cyclic voltammetry experiments. Moreover, to confirm a molecular level interaction picosecond-resolved PL-quenching of ZnO NR due to Förster Resonance Energy Transfer (FRET) from donor ZnO NR to the acceptor curcumin moieties was employed. The attachment proximity of ZnO NR and curcumin moieties depends on the size of metals. First principles analysis suggests a variance of attachment sites and heavy metal Hg conjugated curcumin binds through a peripheral hydroxy group to NR. We fabricated a facile photovoltaic device consisting of ZnO NR as the working electrode with Pt counter electrode and iodide-triiodide as the electrolyte. The trend in photocurrent under visible light illumination suggests an enhancement in the case of heavy metal ions due to long range interaction and greater accumulation of charge at the active electrode. Our results provide a detailed physical insight into interfacial processes that are crucial for detecting heavy-metal attached phytomedicines and are thus expected to find vast application as sensors for the detection of selective metal contaminants.
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Affiliation(s)
- Damayanti Bagchi
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India.
| | - Tuhin Kumar Maji
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India.
| | - Samim Sardar
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India.
| | - Peter Lemmens
- Institute for Condensed Matter Physics, TU Braunschweig, Mendelssohnstraße 3, 38106 Braunschweig, Germany and Laboratory for Emerging Nanometrology, TU Braunschweig, 38106 Braunschweig, Germany
| | - Chinmoy Bhattacharya
- Department of Chemistry, Indian Institute of Engineering Science and Technology Shibpur, P.O. Botanic Garden, Howrah-711103, India
| | - Debjani Karmakar
- Technical Physics Division, Bhaba Atomic Research Centre, Mumbai 400085, India
| | - Samir Kumar Pal
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India.
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Li C, Zhang D, Peng J, Li X. The effect of pH, nitrate, iron (III) and bicarbonate on photodegradation of oxytetracycline in aqueous solution. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.01.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hasanpour R, Feizpour F, Jafarpour M, Rezaeifard A. Nickel(ii) riboflavin complex as an efficient nanobiocatalyst for heterogeneous and sustainable oxidation of benzylic alcohols and sulfides. NEW J CHEM 2018. [DOI: 10.1039/c8nj00281a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A novel Ni(ii)Rf2 nanocomplex was prepared, which efficiently oxidizes a wide range of benzyl alcohols and sulfides by employing ideal oxidants in green reaction media.
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Affiliation(s)
- Ravak Hasanpour
- Catalysis Research Laboratory
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
| | - Fahimeh Feizpour
- Catalysis Research Laboratory
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
| | - Maasoumeh Jafarpour
- Catalysis Research Laboratory
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
| | - Abdolreza Rezaeifard
- Catalysis Research Laboratory
- Department of Chemistry
- Faculty of Science
- University of Birjand
- Birjand
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15
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Bagchi D, Ghosh A, Singh P, Dutta S, Polley N, Althagafi II, Jassas RS, Ahmed SA, Pal SK. Allosteric Inhibitory Molecular Recognition of a Photochromic Dye by a Digestive Enzyme: Dihydroindolizine makes α-chymotrypsin Photo-responsive. Sci Rep 2016; 6:34399. [PMID: 27677331 PMCID: PMC5039621 DOI: 10.1038/srep34399] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 09/13/2016] [Indexed: 11/10/2022] Open
Abstract
The structural-functional regulation of enzymes by the administration of an external stimulus such as light could create photo-switches that exhibit unique biotechnological applications. However, molecular recognition of small ligands is a central phenomenon involved in all biological processes. We demonstrate herein that the molecular recognition of a photochromic ligand, dihydroindolizine (DHI), by serine protease α-chymotrypsin (CHT) leads to the photo-control of enzymatic activity. We synthesized and optically characterized the photochromic DHI. Light-induced reversible pyrroline ring opening and a consequent thermal back reaction via 1,5-electrocyclization are responsible for the photochromic behavior. Furthermore, DHI inhibits the enzymatic activity of CHT in a photo-controlled manner. Simultaneous binding of the well-known inhibitors 4-nitrophenyl anthranilate (NPA) or proflavin (PF) in the presence of DHI displays spectral overlap between the emission of CHT-NPA or CHT-PF with the respective absorption of cis or trans DHI. The results suggest an opportunity to explore the binding site of DHI using Förster resonance energy transfer (FRET). Moreover, to more specifically evaluate the DHI binding interactions, we employed molecular docking calculations, which suggested binding near the hydrophobic site of Cys-1-Cys-122 residues. Variations in the electrostatic interactions of the two conformers of DHI adopt unfavorable conformations, leading to the allosteric inhibition of enzymatic activity.
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Affiliation(s)
- Damayanti Bagchi
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
| | - Abhijit Ghosh
- Computer Service Cell, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
| | - Priya Singh
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
| | - Shreyasi Dutta
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
| | - Nabarun Polley
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
| | - Ismail I Althagafi
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
| | - Rabab S Jassas
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, 21955 Makkah, Saudi Arabia
| | - Saleh A Ahmed
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, 21955 Makkah, Saudi Arabia.,Chemistry Department, Faculty of Science, Assiut University, 71516 Assiut, Egypt
| | - Samir Kumar Pal
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
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16
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Polley N, Sarkar PK, Chakrabarti S, Lemmens P, Pal SK. DNA Biomaterial Based Fiber Optic Sensor: Characterization and Application for Monitoringin situMercury Pollution. ChemistrySelect 2016. [DOI: 10.1002/slct.201600391] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Nabarun Polley
- Department of Chemical, Biological and Macromolecular Sciences; S. N. Bose National Centre for Basic Sciences; Block JD, Sector III, Salt Lake Kolkata 700 106 India
| | - Probir Kumar Sarkar
- Department of Chemical, Biological and Macromolecular Sciences; S. N. Bose National Centre for Basic Sciences; Block JD, Sector III, Salt Lake Kolkata 700 106 India
| | - Subhananda Chakrabarti
- Dept. of Electrical Engineering; Indian Institute of Technology Bombay, Powai; Mumbai 400 076, Maharashtra India
| | - Peter Lemmens
- Institute for Condensed Matter Physics; TU Braunschweig; Mendelssohnsstr 3 38106 Braunschweig Germany
| | - Samir Kumar Pal
- Department of Chemical, Biological and Macromolecular Sciences; S. N. Bose National Centre for Basic Sciences; Block JD, Sector III, Salt Lake Kolkata 700 106 India
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17
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Sarkar PK, Polley N, Chakrabarti S, Lemmens P, Pal SK. Nanosurface Energy Transfer Based Highly Selective and Ultrasensitive “Turn on” Fluorescence Mercury Sensor. ACS Sens 2016. [DOI: 10.1021/acssensors.6b00153] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Probir Kumar Sarkar
- Department
of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt
Lake, Kolkata 700106, India
| | - Nabarun Polley
- Department
of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt
Lake, Kolkata 700106, India
| | - Subhananda Chakrabarti
- Department
of Electrical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, Maharashtra, India
| | | | - Samir Kumar Pal
- Department
of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt
Lake, Kolkata 700106, India
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18
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Chaudhuri S, Sardar S, Bagchi D, Dutta S, Debnath S, Saha P, Lemmens P, Pal SK. Photoinduced Dynamics and Toxicity of a Cancer Drug in Proximity of Inorganic Nanoparticles under Visible Light. Chemphyschem 2015; 17:270-7. [PMID: 26563628 DOI: 10.1002/cphc.201500905] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 11/06/2015] [Indexed: 12/22/2022]
Abstract
Drug sensitization with various inorganic nanoparticles (NPs) has proved to be a promising and an emergent concept in the field of nanomedicine. Rose bengal (RB), a notable photosensitizer, triggers the formation of reactive oxygen species under green-light irradiation, and consequently, it induces cytotoxicity and cell death. In the present study, the effect of photoinduced dynamics of RB upon complexation with semiconductor zinc oxide NPs is explored. To accomplish this, we successfully synthesized nanohybrids of RB with ZnO NPs with a particle size of 24 nm and optically characterized them. The uniform size and integrity of the particles were confirmed by high-resolution transmission electron microscopy. UV/Vis absorption and steady-state fluorescence studies reveal the formation of the nanohybrids. ultrafast picosecond-resolved fluorescence studies of RB-ZnO nanohybrids demonstrate an efficient electron transfer from the photoexcited drug to the semiconductor NPs. Picosecond-resolved Förster resonance energy transfer from ZnO NPs to RB unravel the proximity of the drug to the semiconductor at the molecular level. The photoinduced ROS formation was monitored using a dichlorofluorescin oxidation assay, which is a conventional oxidative stress indicator. It is observed that the ROS generation under green light illumination is greater at low concentrations of RB-ZnO nanohybrids compared with free RB. Substantial photodynamic activity of the nanohybrids in bacterial and fungal cell lines validated the in vitro toxicity results. Furthermore, the cytotoxic effect of the nanohybrids in HeLa cells, which was monitored by MTT assay, is also noteworthy.
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Affiliation(s)
- Siddhi Chaudhuri
- Department of Chemical, Biological & Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata, 700098, India
| | - Samim Sardar
- Department of Chemical, Biological & Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata, 700098, India
| | - Damayanti Bagchi
- Department of Chemical, Biological & Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata, 700098, India
| | - Shreyasi Dutta
- Department of Chemical, Biological & Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata, 700098, India
| | - Sushanta Debnath
- Crystallography and Molecular Biology Division, Saha Institute of Nuclear Physics, Sector I, Block AF, Bidhannagar, Kolkata, 700064, India
| | - Partha Saha
- Crystallography and Molecular Biology Division, Saha Institute of Nuclear Physics, Sector I, Block AF, Bidhannagar, Kolkata, 700064, India
| | - Peter Lemmens
- Institute for Condensed Matter Physics, TU Braunschweig, Mendelssohnstraße 3, 38106, Braunschweig, Germany
| | - Samir Kumar Pal
- Department of Chemical, Biological & Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata, 700098, India.
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19
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Bagchi D, Chaudhuri S, Sardar S, Choudhury S, Polley N, Lemmens P, Pal SK. Modulation of stability and functionality of a phyto-antioxidant by weakly interacting metal ions: curcumin in aqueous solution. RSC Adv 2015. [DOI: 10.1039/c5ra21593e] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Metal exchange process in metallo–curcumin leading to duality in action: enhancement of both aqueous stability and anti-oxidant property.
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Affiliation(s)
- Damayanti Bagchi
- Department of Chemical
- Biological and Macromolecular Sciences
- S. N. Bose National Centre for Basic Sciences
- Kolkata 700 098
- India
| | - Siddhi Chaudhuri
- Department of Chemical
- Biological and Macromolecular Sciences
- S. N. Bose National Centre for Basic Sciences
- Kolkata 700 098
- India
| | - Samim Sardar
- Department of Chemical
- Biological and Macromolecular Sciences
- S. N. Bose National Centre for Basic Sciences
- Kolkata 700 098
- India
| | - Susobhan Choudhury
- Department of Chemical
- Biological and Macromolecular Sciences
- S. N. Bose National Centre for Basic Sciences
- Kolkata 700 098
- India
| | - Nabarun Polley
- Department of Chemical
- Biological and Macromolecular Sciences
- S. N. Bose National Centre for Basic Sciences
- Kolkata 700 098
- India
| | - Peter Lemmens
- Institute for Condensed Matter Physics
- TU Braunschweig
- 38106 Braunschweig
- Germany
- Laboratory for Emerging Nanometrology
| | - Samir Kumar Pal
- Department of Chemical
- Biological and Macromolecular Sciences
- S. N. Bose National Centre for Basic Sciences
- Kolkata 700 098
- India
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