1
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Abstract
Natural evolution has provided multicellular organisms with sophisticated functionalities and repair mechanisms for surviving and preserve their functions after an injury and/or infection. In this context, biological systems have inspired material scientists over decades to design and fabricate both self-healing polymeric materials and soft actuators with remarkable performance. The latter are capable of modifying their shape in response to environmental changes, such as temperature, pH, light, electrical/magnetic field, chemical additives, etc. In this review, we focus on the fusion of both types of materials, affording new systems with the potential to revolutionize almost every aspect of our modern life, from healthcare to environmental remediation and energy. The integration of stimuli-triggered self-healing properties into polymeric soft actuators endow environmental friendliness, cost-saving, enhanced safety, and lifespan of functional materials. We discuss the details of the most remarkable examples of self-healing soft actuators that display a macroscopic movement under specific stimuli. The discussion includes key experimental data, potential limitations, and mechanistic insights. Finally, we include a general table providing at first glance information about the nature of the external stimuli, conditions for self-healing and actuation, key information about the driving forces behind both phenomena, and the most important features of the achieved movement.
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Affiliation(s)
- Sebastian Bonardd
- Departamento
de Química Orgánica, Universidad
de La Laguna, Avenida Astrofísico Francisco Sánchez, La Laguna 38206, Tenerife Spain,Instituto
Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez, La Laguna 38206, Tenerife Spain,S.D.: email,
| | - Mridula Nandi
- Department
of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - José Ignacio Hernández García
- Departamento
de Química Orgánica, Universidad
de La Laguna, Avenida Astrofísico Francisco Sánchez, La Laguna 38206, Tenerife Spain,Instituto
Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez, La Laguna 38206, Tenerife Spain
| | - Binoy Maiti
- School
of Chemistry & Biochemistry, Georgia
Institute of Technology, 901 Atlantic Drive NW, Atlanta, Georgia 30332, United
States
| | - Alex Abramov
- Institute
of Organic Chemistry, University of Regensburg, Universitätstrasse 31, Regensburg 93053, Germany
| | - David Díaz Díaz
- Departamento
de Química Orgánica, Universidad
de La Laguna, Avenida Astrofísico Francisco Sánchez, La Laguna 38206, Tenerife Spain,Instituto
Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez, La Laguna 38206, Tenerife Spain,Institute
of Organic Chemistry, University of Regensburg, Universitätstrasse 31, Regensburg 93053, Germany,D.D.D.:
email,
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2
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Gond M, Pandey SK, Chandra S, Tiwari N, Bharty M, Maiti B, Katiyar D, Butcher R. Zinc(II) catalyzed synthesis of 2-(4-methoxyphenyl)-5-(2-pyridyl)-1,3,4-thiadiazole: Characterizations, crystal structure, DFT calculation, Hirshfeld surface analysis, and molecular docking analysis. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133586] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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3
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Sakre N, Das SK, Maiti B. Hybrid microwave with hot air drying of black‐gram (
Vigna mungo L
) nuggets: Drying characteristics, modeling and process optimization. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.17012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nilesh Sakre
- Agricultural and Food Engineering Department Indian Institute of Technology Kharagpur 721302 India
| | - S. K. Das
- Agricultural and Food Engineering Department Indian Institute of Technology Kharagpur 721302 India
| | - B. Maiti
- Department of Mechanical Engineering Indian Institute of Technology Kharagpur 721302 India
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4
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Bonardd S, Maiti B, Grijalvo S, Rodríguez J, Enshaei H, Kortaberria G, Alemán C, Díaz Díaz D. Biomass-derived isosorbide-based thermoresponsive hydrogel for drug delivery. Soft Matter 2022; 18:4963-4972. [PMID: 35748523 DOI: 10.1039/d2sm00623e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Herein, we describe the design and synthesis of a new variety of bio-based hydrogel films using a Cu(I)-catalyzed photo-click reaction. These films exhibited thermal-triggered swelling-deswelling and were constructed by crosslinking a triazide derivative of glycerol ethoxylate and dialkyne structures derived from isosorbide, a well-known plant-based platform molecule. The success of the click reaction was corroborated through infrared spectroscopy (FTIR) and the smooth surface of the obtained films was confirmed by scanning electron microscopy (SEM). The thermal characterization was carried out in terms of thermogravimetry (TGA) and differential scanning calorimetry (DSC), from which the decomposition onset and glass transition temperatures were determined, respectively. Additionally, mechanical properties of the samples were estimated by stress-strain experiments. Then, their swelling and deswelling properties were systematically examined in PBS buffer, revealing a thermoresponsive behavior that was successfully tested in the release of the anticancer drug doxorubicin. We also confirmed the non-cytotoxicity of these materials, which is a fundamental aspect for their potential use as drug carriers or tissue engineering matrices.
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Affiliation(s)
- Sebastian Bonardd
- Departmento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, La Laguna 38206, Tenerife, Spain.
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 2, La Laguna 38206, Tenerife, Spain
| | - Binoy Maiti
- School of Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Dr NW, Atlanta, GA, 30332, USA
| | - Santiago Grijalvo
- Networking Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Jacqueline Rodríguez
- Departmento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, La Laguna 38206, Tenerife, Spain.
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 2, La Laguna 38206, Tenerife, Spain
| | - Hamidreza Enshaei
- Departament d'Enginyeria Química and Barcelona Research Center in Multiscale Science and Engineering, IMEM-BRT, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I, 08019, Barcelona, Spain
| | - Galder Kortaberria
- Materials + Technologies" Group, Chemical & Environmental Engineering Department, Basque Country University, Plaza Europa 1, 20018, Donostia, Spain
| | - Carlos Alemán
- Departament d'Enginyeria Química and Barcelona Research Center in Multiscale Science and Engineering, IMEM-BRT, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I, 08019, Barcelona, Spain
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, 08028, Barcelona, Spain
| | - David Díaz Díaz
- Departmento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, La Laguna 38206, Tenerife, Spain.
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 2, La Laguna 38206, Tenerife, Spain
- Institute of Organic Chemistry, University of Regensburg, Universitätstr. 31, Regensburg 93053, Germany
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5
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Gond M, Shukla A, Pandey SK, Bharty M, Maiti B, Acharya A, Tiwari N, Katiyar D, Butcher R. Mn(II) catalyzed synthesis of 5(4-hydroxyphenyl)-2-(N-phenylamino)-1,3,4-oxadiazole: Crystal structure, DFT, molecular docking, Hirshfeld surface analysis, and in vitro anticancer activity on DL cells. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131547] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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6
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Chandra S, Gond M, Jaiswal S, Bharty M, Maiti B, Kushwaha D, Butcher R. Synthesis, structural characterization, DFT, fluorescence, and redox behaviour of 4-[5-(2-picolylsulfanyl)-1,3,4-oxadiazole-2-yl]-pyridine. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Gond MK, Pandey SK, Singh R, Bharty MK, Manna PP, Singh VK, Maiti B, Prasad LB, Butcher RJ. In vitro and In silico anticancer activities of Mn( ii), Co( ii), and Ni( ii) complexes: synthesis, characterization, crystal structures, and DFT studies. NEW J CHEM 2022. [DOI: 10.1039/d2nj00264g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Complexes 1, 2 and 3 showed significant activity against K562, MCF-7, and DL cancer cell lines. Complexes 1–3 showed higher growth inhibition than metal salts or ligands in tumour cell growth and colony formation. Complex 1 exhibited higher anticancer activity than cisplatin.
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Affiliation(s)
- M. K. Gond
- Department of Chemistry, Banaras Hindu University, Varanasi-221005, India
| | | | - R. Singh
- Department of Zoology Banaras Hindu University, Varanasi-221005, India
| | - Manoj K. Bharty
- Department of Chemistry, Banaras Hindu University, Varanasi-221005, India
| | | | - V. K. Singh
- School of Biotechnology, Banaras Hindu University, Varanasi-221005, India
| | - B. Maiti
- Department of Chemistry, Banaras Hindu University, Varanasi-221005, India
| | - L. B. Prasad
- Department of Chemistry, Banaras Hindu University, Varanasi-221005, India
| | - R. J. Butcher
- Department of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA
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8
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Maiti B, Nandi M, Bonardd S, Franco L, Puiggalí J, Enshaei H, Alemán C, Díaz Díaz D. Efficient One-Pot Preparation of Thermoresponsive Polyurethanes with Lower Critical Solution Temperatures. Chempluschem 2021; 86:1570-1576. [PMID: 34851049 DOI: 10.1002/cplu.202100451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/12/2021] [Indexed: 11/07/2022]
Abstract
This work reports a simple and scalable strategy to prepare a series of thermoresponsive polyurethanes synthesized via copolymerization of dicyclohexyl diisocyanate with glycerol ethoxylate in a single one-pot system. These polyurethanes exhibit lower critical solution temperatures (LCST) at 57 °C. The LCST of synthesized polyurethane was determined from Dynamic Scanning Calorimetry and UV-vis measurements. Both the LCST and Tg of synthesized polyurethane was tuned by varying the ratio between hard segment (dicyclohexyl diisocyanate) and soft segment (glycerol ethoxylate). Thus, Tg values could be tuned from -54.6 °C to -19.9 °C for samples with different flexibility. The swelling and deswelling studies were done at room temperature and above the LCST respectively. The results showed that the swelling ratio increases with the increase of soft segment (glycerol ethoxylate) in synthesized polyurethanes. Furthermore, the mechanical properties of the membrane were studied by universal tensile testing measurements. Specifically, stress at break values varied from 0.35±0.07 MPa to 0.91±0.15 MPa for the tested membranes, whereas elongation at break data ranged from 101.9±20.9 % to 192.4±24.4 %, and Young's modulus varied from 0.35±0.03 MPa to 1.85±0.19 MPa. Tensile strength of the films increased with the increase of the hard segment and elongation at break decreased.
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Affiliation(s)
- Binoy Maiti
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053, Regensburg, Germany
| | - Mridula Nandi
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053, Regensburg, Germany
| | - Sebastián Bonardd
- Departamento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206, La Laguna, Tenerife, Spain.,Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 2, 38206, La Laguna, Tenerife, Spain
| | - Lourdes Franco
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany 10-14, Ed. 12, 08019, Barcelona, Spain.,Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany 10-14, Ed. C, 08019, Barcelona, Spain
| | - Jordi Puiggalí
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany 10-14, Ed. 12, 08019, Barcelona, Spain.,Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany 10-14, Ed. C, 08019, Barcelona, Spain.,Institute for Bioengineering of Catalonia, IBEC, The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, 08028, Barcelona, Spain
| | - Hamidreza Enshaei
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany 10-14, Ed. 12, 08019, Barcelona, Spain
| | - Carlos Alemán
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany 10-14, Ed. 12, 08019, Barcelona, Spain.,Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany 10-14, Ed. C, 08019, Barcelona, Spain.,Institute for Bioengineering of Catalonia, IBEC, The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, 08028, Barcelona, Spain
| | - David Díaz Díaz
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053, Regensburg, Germany.,Departamento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, 38206, La Laguna, Tenerife, Spain.,Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 2, 38206, La Laguna, Tenerife, Spain
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9
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Abramov A, Maiti B, Reiser O, Díaz Díaz D. An air-tolerant polymer gel-immobilized iridium photocatalyst with pumping recyclability properties. Chem Commun (Camb) 2021; 57:7762-7765. [PMID: 34250985 DOI: 10.1039/d1cc03020e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A novel methacrylate-based cross-linked polymer gel bearing an iridium photocatalyst showed air tolerance and pumping recyclability features through its tunable swelling and deswelling ability. The photocatalytic activity of the polymer gel was demonstrated through an E-to-Z isomerisation reaction and in an azide-alkene [2+3] cycloaddition.
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Affiliation(s)
- Alex Abramov
- Institute of Organic Chemistry, University of Regensburg, Universitätsstr. 31, Regensburg 93040, Germany.
| | - Binoy Maiti
- Institute of Organic Chemistry, University of Regensburg, Universitätsstr. 31, Regensburg 93040, Germany.
| | - Oliver Reiser
- Institute of Organic Chemistry, University of Regensburg, Universitätsstr. 31, Regensburg 93040, Germany.
| | - David Díaz Díaz
- Institute of Organic Chemistry, University of Regensburg, Universitätsstr. 31, Regensburg 93040, Germany. and Departamento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, La Laguna 38206, Spain. and Instituto de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 2, La Laguna 38206, Spain
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10
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Abramov A, Maiti B, Keridou I, Puiggalí J, Reiser O, Díaz DD. A pH‐Triggered Polymer Degradation or Drug Delivery System by Light‐Mediated
Cis
/
Trans
Isomerization of
o
‐Hydroxy Cinnamates. Macromol Rapid Commun 2021. [DOI: 10.1002/marc.202170050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Abramov A, Maiti B, Keridou I, Puiggalí J, Reiser O, Díaz DD. A pH-Triggered Polymer Degradation or Drug Delivery System by Light-Mediated Cis/Trans Isomerization of o-Hydroxy Cinnamates. Macromol Rapid Commun 2021; 42:e2100213. [PMID: 34031940 DOI: 10.1002/marc.202100213] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/08/2021] [Indexed: 11/10/2022]
Abstract
A new methodology for the pH-triggered degradation of polymers or for the release of drugs under visible light irradiation based on the cyclization of ortho-hydroxy-cinnamates (oHC) to coumarins is described. The key oHC structural motif can be readily incorporated into the rational design of novel photocleavable polymers via click chemistry. This main-chain moiety undergoes a fast photocleavage when irradiated with 455 nm light provided that a suitable base is added. A series of polyethylene glycol-alt-ortho-hydroxy cinnamate (polyethylene glycol (PEG)n -alt-oHC)-based polymers are synthesized and the time-dependent visible-light initiated cleavage of the photoactive monomer and polymer is investigated in solution by a variety of spectroscopic and chromatographic techniques. The photo-degradation behavior of the water-soluble poly(PEG2000 -alt-oHC) is investigated within a broad pH range (pH = 2.1-11.8), demonstrating fast degradation at pH 11.8, while the stability of the polymer is greatly enhanced at pH 2.1. Moreover, the neat polymer shows long-term stability under daylight conditions, thus allowing its storage without special precautions. In addition, two water-soluble PEG-based drug-carrier molecules (mPEG2000 -oHC-benzhydrol/phenol) are synthesized and used for drug delivery studies, monitoring the process by UV-vis spectroscopy in an ON/OFF intermittent manner.
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Affiliation(s)
- Alex Abramov
- Institute of Organic Chemistry, University of Regensburg, Universitätstr. 31, 93053, Regensburg, Germany
| | - Binoy Maiti
- Institute of Organic Chemistry, University of Regensburg, Universitätstr. 31, 93053, Regensburg, Germany
| | - Ina Keridou
- Department d'Enginyeria Química, Ecola d'Enginyeria de Barcelona Est-EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany 10-14, Barcelona, 08019, Spain
| | - Jordi Puiggalí
- Department d'Enginyeria Química, Ecola d'Enginyeria de Barcelona Est-EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany 10-14, Barcelona, 08019, Spain.,Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, C/Baldiri Reixax 10-12, Barcelona, 08028, Spain
| | - Oliver Reiser
- Institute of Organic Chemistry, University of Regensburg, Universitätstr. 31, 93053, Regensburg, Germany
| | - David Díaz Díaz
- Institute of Organic Chemistry, University of Regensburg, Universitätstr. 31, 93053, Regensburg, Germany.,Departmento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, La Laguna, Tenerife, 38206, Spain.,Instituto de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 2, La Laguna, Tenerife, 38206, Spain
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12
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Affiliation(s)
- Binoy Maiti
- Institut für Organische Chemie Universität Regensburg Regensburg Germany
| | - Alex Abramov
- Institut für Organische Chemie Universität Regensburg Regensburg Germany
| | - M. G. Finn
- School of Chemistry and Biochemistry, School of Biological Sciences Georgia Institute of Technology Atlanta Georgia USA
| | - David Díaz Díaz
- Institut für Organische Chemie Universität Regensburg Regensburg Germany
- Departamento de Química Orgánica Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez Tenerife Spain
- Instituto Universitario de Bio‐Orgánica Antonio González Universidad de La Laguna Tenerife Spain
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13
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Abstract
A new water-soluble methionine-based CO releasing polymer shows slow and spontaneous release of CO with sustained-release kinetics, preventing biofilm formation against Pseudomonas aeruginosa.
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Affiliation(s)
- Binoy Maiti
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
| | - Gervase Ng
- Australian Centre for NanoMedicine (ACN)
- School of Chemical Engineering
- UNSW Australia
- Sydney
- Australia
| | - Alex Abramov
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
| | - Cyrille Boyer
- Australian Centre for NanoMedicine (ACN)
- School of Chemical Engineering
- UNSW Australia
- Sydney
- Australia
| | - David Díaz Díaz
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
- Departamento de Química Orgánica
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14
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Chaurasia R, Bharty M, Nath P, Sonkar PK, Ganesan V, Maiti B, Bharti A, Butcher R. Photophysical, electrochemical and TD-DFT studies of Ni(II) and Mn(II) complexes of N′-(2-methylfuran-3-carbonyl)hydrazine carbodithioic acid ethyl ester. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.114160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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15
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Sánchez-Jiménez M, Estrany F, Borràs N, Maiti B, Díaz Díaz D, Del Valle LJ, Alemán C. Antimicrobial activity of poly(3,4-ethylenedioxythiophene) n-doped with a pyridinium-containing polyelectrolyte. Soft Matter 2019; 15:7695-7703. [PMID: 31502620 DOI: 10.1039/c9sm01491h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In spite of p-doped conducting polymers having been widely studied in the last decades and many applications having been developed, studies based on n-doped conducting polymers are extremely scarce. This fact is even more evident when it comes to conducting polymers n-doped with polycations, even though polyanions, such as poly(styrenesulfonate), are often used to obtain p-doped conducting polymers. In this work poly(pyridinium-1,4-diyliminocarbonyl-1,4-phenylene-methylene chloride), abbreviated as P(Py-1,4-P), has been used to prepare n-doped poly(3,4-ethylenedioxythiophene) (PEDOT) electrodes by applying a reduction potential to a de-doped PEDOT film in a P(Py-1,4-P) water solution. The utilization of this cationic polyelectrolyte as an n-dopant agent results in drastic superficial changes, as is observed by comparing the morphology, topography and wettability of p-doped, de-doped and n-doped PEDOT. Cytotoxicity, cell adhesion and cell proliferation assays, which have been conducted using epithelial and fibroblast cell lines, show that the amount of P(Py-1,4-P) in the re-doped PEDOT films is below that required to observe a cytotoxic harmful response and that n-doped PEDOT:P(Py-1,4-P) films are biocompatible. The non-specific bacteriostatic properties of n-doped PEDOT:P(Py-1,4-P) films have been demonstrated against E. coli and S. aureus bacteria (Gram-negative and Gram-positive, respectively) using bacterial growth curves and adhesion assays. Although the bacteriostatic effect is in part due to the conducting polymer, as is proved by results for p-doped and de-doped PEDOT, the incorporation of P(Py-1,4-P) through the re-doping process greatly enhances this antimicrobial behaviour. Thus, only a small concentration of this cationic polyelectrolyte (∼0.1 mM) is needed to inhibit bacterial growth.
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Affiliation(s)
- Margarita Sánchez-Jiménez
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I2, 08019, Barcelona, Spain.
| | - Francesc Estrany
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I2, 08019, Barcelona, Spain. and Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. C, 08019, Barcelona, Spain
| | - Núria Borràs
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I2, 08019, Barcelona, Spain.
| | - Binoy Maiti
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - David Díaz Díaz
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany and Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Luis J Del Valle
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I2, 08019, Barcelona, Spain. and Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. C, 08019, Barcelona, Spain
| | - Carlos Alemán
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I2, 08019, Barcelona, Spain. and Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. C, 08019, Barcelona, Spain and Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, 08028 Barcelona, Spain
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16
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Abstract
Nature is intrinsically able to control kinetics, conversion, and selectivity of biochemical processes by means of confined reaction environments such as enzyme pockets, bilayer membranes, micelles, vesicles, cells, or bioorganic frameworks. The main reason for this fact is the optimal molecular alignment and restricted motion of reactant molecules compared to those found in bulk solution. Under this inspiration, a number of synthetic photo-nanoreactors based on supramolecular self-assembled systems have been developed during the last decades, including mesoporous inorganic materials, microemulsions, micelles, vesicles, lipid bilayer foams, polyelectrolyte nanoparticles, etc. In a broader sense, nanoreactor technology constitutes nowadays a promising tool to enhance organic synthesis under sustainable reaction conditions. In general, nanoreactors change the essential properties of the molecules within them, thus affecting their chemical reactivity. Among the nanoreactor-like systems described in the literature to facilitate photochemical processes, the more recent use of viscoelastic supramolecular gels, typically made of low-molecular-weight (LMW) compounds self-assembled through noncovalent interactions, as compartmentalized reaction media is particularly appealing due to the versatility of these materials in terms of fabrication, properties, and processability. Furthermore, the high specific surface areas found in supramolecular gels, their stimuli-responsive reversibility, good diffusion properties enhancing the interactions between reactants and the three-dimensional (3D) porous network, functional tunability, and blocking effect of external oxygen are some of the most important features that can benefit photoinduced processes carried out in confined gel media. Not surprisingly, the efficiency of photochemical processes inside gel media is largely dependent on the type of reaction, characteristics of the gel network, solvent nature, reactant properties, and reaction conditions. Thus, the main focus of this Account is to provide a concise overview of the most relevant examples reported by us and others in order to illustrate the main advantages associated with the emerging use of gel-based materials as nonconventional reaction media to facilitate and control photochemical reactions. In particular, photodimerization, triplet-triplet annihilation upconversion (TTA-UC) coupled to single electron transfer (SET), photooxidation, photoreduction, and trifluoromethylation reactions will be illustrated during the discussion. These examples suggest that gel-based media can provide a versatile platform for the discovery of new reaction pathways and facilitate the way that photochemical reactions are traditionally carried out in academia and industry in terms of reaction conditions and required infrastructure. In addition, the use of physical or chemical gels as reaction systems may also accelerate high-throughput screening of photocatalysts. Overall, a judicious choice of gelators, reactants, solvent, and reaction conditions for the assembly of these gelators is crucial for controlling conversion, kinetics, and selectivity of intragel photoinduced processes.
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Affiliation(s)
- Binoy Maiti
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Alex Abramov
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Raúl Pérez-Ruiz
- Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - David Díaz Díaz
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
- Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, La Laguna, 38206 Tenerife Spain
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17
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Kumar V, Maiti B, Chini MK, De P, Satapathi S. Multimodal Fluorescent Polymer Sensor for Highly Sensitive Detection of Nitroaromatics. Sci Rep 2019; 9:7269. [PMID: 31086230 PMCID: PMC6514181 DOI: 10.1038/s41598-019-43836-w] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 04/18/2019] [Indexed: 11/15/2022] Open
Abstract
Detection of nitroaromatic explosives with high sensitivity and selectivity is extremely important for civilian and military safety. Here, we report the synthesis and multimodal sensing applications of an emissive alanine based dansyl tagged copolymer P(MMA-co-Dansyl-Ala-HEMA) (DCP), synthesized by RAFT copolymerization. The fluorescent co-polymer exhibited high sensitivity and selectivity towards conventional nitroaromatic explosives such as DNT, TNT and TNP in solution at lower range of µM level and also with saturated vapor of NACs. The quantum yield of the co-polymer was measured to be very high (Φf = 77%) which make it an ideal candidate for sensing in solution as well as in vapor phase. The fluorescence signal from DCP copolymer gets significantly quenched upon addition of aliquots of DNT, TNT, and TNP. The Stern-Volmer constant was calculated to be very high. The quenching mechanism was further established by fluorescence up-conversion, time-resolved fluorescence and steady state absorption spectroscopy. The energetics of sensing process was calculated by Density Functional Theory (DFT) studies. We also fabricate a thin film polymer sensor which was able to detect nitroaromatic vapors with high selectivity. This opens up the possibility of building a low-cost and light-weight nitroaromatic explosives sensor for field use.
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Affiliation(s)
- Vishal Kumar
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
| | - Binoy Maiti
- Polymer Research Center, Department of Chemical Science, Indian Institute of Science Education and Research, Kolkata, Mohanpur, 741246, India
| | - Mrinmoy Kumar Chini
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
| | - Priyadarsi De
- Polymer Research Center, Department of Chemical Science, Indian Institute of Science Education and Research, Kolkata, Mohanpur, 741246, India
| | - Soumitra Satapathi
- Department of Physics, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India.
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18
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Nandi M, Maiti B, Banerjee S, De P. Hydrogen bonding driven self-assembly of side-chain amino acid and fatty acid appended poly(methacrylate)s: Gelation and application in oil spill recovery. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29289] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Mridula Nandi
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences; Indian Institute of Science Education and Research, Kolkata; Mohanpur, 741246, Nadia West Bengal India
| | - Binoy Maiti
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences; Indian Institute of Science Education and Research, Kolkata; Mohanpur, 741246, Nadia West Bengal India
| | - Soham Banerjee
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences; Indian Institute of Science Education and Research, Kolkata; Mohanpur, 741246, Nadia West Bengal India
| | - Priyadarsi De
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences; Indian Institute of Science Education and Research, Kolkata; Mohanpur, 741246, Nadia West Bengal India
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19
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Mete S, Mukherjee P, Maiti B, Pal S, Ghorai PK, De P. Degradable Crystalline Polyperoxides from Fatty Acid Containing Styrenic Monomers. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01981] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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20
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Abstract
The human nervous system lacks an inherent ability to regenerate its components upon damage or diseased conditions. During the last decade, this has motivated the development of a number of strategies for nerve regeneration. However, most of those approaches have not been used in clinical applications till today. For instance, although biomaterial-based scaffolds have been extensively used for nerve reparation, the lack of more customized structures have hampered their use in vivo. This highlight focuses mainly on how 3D bioprinting technology, using polymeric hydrogels as bio-inks, can be used for the development of new nerve guidance channels or devices for peripheral nerve cell regeneration. In this concise contribution, some of the most recent and representative examples are highlighted to discuss the challenges involved in various aspects of 3D bioprinting for nerve cell regeneration, specifically when using polymeric hydrogels.
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Affiliation(s)
- Binoy Maiti
- Institute of Organic Chemistry, University of Regensburg, Universitätstr. 31, 93053 Regensburg, Germany.
| | - David Díaz Díaz
- Institute of Organic Chemistry, University of Regensburg, Universitätstr. 31, 93053 Regensburg, Germany.
- Instituto de Química Avanzada de Cataluña-Consejo Superior de Investigaciones Científicas (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain.
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21
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Nandi M, Maiti B, Srikanth K, De P. Supramolecular Interaction-Assisted Fluorescence and Tunable Stimuli-Responsiveness of l-Phenylalanine-Based Polymers. Langmuir 2017; 33:10588-10597. [PMID: 28918640 DOI: 10.1021/acs.langmuir.7b02431] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Supramolecular host-guest interactions between randomly methylated β-cyclodextrin (RM β-CD) and side-chain phenylalanine (Phe) and Phe-Phe dipeptide-based homopolymers have been employed for the amplification of fluorescence emission of otherwise weakly fluorescent amino acid Phe. The host-guest complex has been characterized by 1H and 13C NMR spectroscopy, two-dimensional rotating-frame overhauser spectroscopy, Fourier-transform infrared spectroscopy, UV-visible spectroscopy, and fluorescence spectroscopy. To gain insights into the origin of fluorescence in homopolymers, density functional theory calculations were performed where phenyl moieties inside the less polar core of β-CD were observed to form a π-π coupled complex resulting in an enhanced emission. Furthermore, the complex-forming ability of Phe, the guest molecule, has been employed in tuning the cloud point temperature (TCP) of statistical copolymers derived from side-chain Phe/Phe-Phe-based methacrylate monomers and N-isopropylacrylamide. By varying the co-monomer feed ratios in the statistical copolymer and hence the concentration of RM β-CD throughout the polymer chain, host-guest interaction-assisted broad tunability in TCP of the supramolecular polymeric complex has been achieved.
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Affiliation(s)
- Mridula Nandi
- Polymer Research Centre, ‡Department of Chemical Sciences, and §Centre for Advanced Functional Materials, Indian Institute of Science Education and Research Kolkata , Mohanpur, 741246 Nadia, West Bengal, India
| | - Binoy Maiti
- Polymer Research Centre, ‡Department of Chemical Sciences, and §Centre for Advanced Functional Materials, Indian Institute of Science Education and Research Kolkata , Mohanpur, 741246 Nadia, West Bengal, India
| | - Kambalapalli Srikanth
- Polymer Research Centre, ‡Department of Chemical Sciences, and §Centre for Advanced Functional Materials, Indian Institute of Science Education and Research Kolkata , Mohanpur, 741246 Nadia, West Bengal, India
| | - Priyadarsi De
- Polymer Research Centre, ‡Department of Chemical Sciences, and §Centre for Advanced Functional Materials, Indian Institute of Science Education and Research Kolkata , Mohanpur, 741246 Nadia, West Bengal, India
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22
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Maiti B, Haldar U, Rajasekhar T, De P. Functional-Polymer Library through Post-Polymerization Modification of Copolymers Having Oleate and Pentafluorophenyl Pendants. Chemistry 2017; 23:15156-15165. [PMID: 28850744 DOI: 10.1002/chem.201703151] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Indexed: 01/11/2023]
Affiliation(s)
- Binoy Maiti
- Department of Chemical Sciences; Indian Institute of Science Education and Research Kolkata; Mohanpur Nadia, West Bengal 741246 India
| | - Ujjal Haldar
- Department of Chemical Sciences; Indian Institute of Science Education and Research Kolkata; Mohanpur Nadia, West Bengal 741246 India
| | - Tota Rajasekhar
- Department of Chemical Sciences; Indian Institute of Science Education and Research Kolkata; Mohanpur Nadia, West Bengal 741246 India
| | - Priyadarsi De
- Department of Chemical Sciences; Indian Institute of Science Education and Research Kolkata; Mohanpur Nadia, West Bengal 741246 India
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23
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Gurtler V, Grando D, Kumar B, Maiti B, Karunasagar I, Karunasagar I. Corrigendum to “The Use of Recombined Ribosomal RNA Operon (rrn) Type-Specific Flanking Genes to Investigate rrn Differences Between Vibrio parahaemolyticus Environmental and Clinical Strains.” [Gene Rep. 4 (2016) 16–25]. Gene Reports 2017. [DOI: 10.1016/j.genrep.2016.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Abstract
Actin filament dynamics is important for proper cellular functions and is controlled by hundreds of actin binding proteins inside the cells. There are several natural and synthetic compounds that are able to bind actin and alter the actin filament dynamics. Since the actin dynamics changes due to nonspecific electrostatic interactions between negatively charged actin and positively charged proteins, and natural or synthetic compounds, herein we report the synthesis of poly(tert-butyl carbamate (Boc)-l-alanine methacryloyloxyethyl ester) (P(Boc-Ala-HEMA)) homopolymer in a controlled fashion by the reversible addition-fragmentation chain transfer (RAFT) polymerization. Subsequent deprotection of the Boc groups in the homopolymer under acidic conditions resulted in a positively charged polymer with primary amine moieties at the side chains. This cationic polymer (P(NH3 +-Ala-HEMA)), is able to nucleate actin in vitro. The cationic polymer and corresponding partially fluorescence tagged polymer are able to nucleate actin filament in vivo. These polymers are nontoxic to the cultured cells and also stabilize the filamentous actin in vitro.
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Affiliation(s)
- Binoy Maiti
- Polymer Research Centre, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur - 741246, Nadia, West Bengal, India.
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25
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Maiti B, Bauri K, Nandi M, De P. Surface functionalized nano-objects from oleic acid-derived stabilizer via non-polar RAFT dispersion polymerization. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28373] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Binoy Maiti
- Department of Chemical Sciences; Polymer Research Centre, Indian Institute of Science Education and Research Kolkata; Mohanpur 741246 West Bengal India
| | - Kamal Bauri
- Department of Chemical Sciences; Polymer Research Centre, Indian Institute of Science Education and Research Kolkata; Mohanpur 741246 West Bengal India
| | - Mridula Nandi
- Department of Chemical Sciences; Polymer Research Centre, Indian Institute of Science Education and Research Kolkata; Mohanpur 741246 West Bengal India
| | - Priyadarsi De
- Department of Chemical Sciences; Polymer Research Centre, Indian Institute of Science Education and Research Kolkata; Mohanpur 741246 West Bengal India
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26
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Nath P, Bharty MK, Maiti B, Bharti A, Butcher RJ, Wikaira JL, Singh NK. Ag(i), Cu(ii), Co(iii) and Hg(ii) complexes and metal-assisted products derived from 4-methyl-piperidine-carbodithioate: syntheses, structures, thermal analyses, redox behaviour and fluorescence properties. RSC Adv 2016. [DOI: 10.1039/c6ra15186h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ag(i), Cu(ii), Co(iii) and Hg(ii) complexes and metal-assisted products derived from 4-methyl piperidine have been synthesized. The Cu(ii) complex is redox reversible and compounds3and5are fluorescent.
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Affiliation(s)
- Paras Nath
- Department of Chemistry
- Banaras Hindu University
- Varanasi-221005
- India
| | - M. K. Bharty
- Department of Chemistry
- Banaras Hindu University
- Varanasi-221005
- India
| | - B. Maiti
- Department of Chemistry
- Banaras Hindu University
- Varanasi-221005
- India
| | - A. Bharti
- Department of Chemistry
- Kirori Mal College
- University of Delhi
- Delhi-110007
- India
| | - R. J. Butcher
- Department of Chemistry
- Howard University
- Washington
- USA
| | - J. L. Wikaira
- Department of Chemistry
- University of Canterbury
- Christchurch 8410
- New Zealand
| | - N. K. Singh
- Department of Chemistry
- Banaras Hindu University
- Varanasi-221005
- India
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27
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Abstract
Side-chain stearic acid containing thermoresponsive and crystalline random copolymers are synthesized via RAFT technique, which self-assembled to spherical micellar structures in aqueous solution depending on stearate content in the copolymer.
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Affiliation(s)
- Binoy Maiti
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur – 741246
- India
| | - Sankar Maiti
- Department of Biological Sciences
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur – 741246
- India
| | - Priyadarsi De
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur – 741246
- India
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28
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Kumar S, Maiti B, De P. Carbohydrate-Conjugated Amino Acid-Based Fluorescent Block Copolymers: Their Self-Assembly, pH Responsiveness, and/or Lectin Recognition. Langmuir 2015; 31:9422-9431. [PMID: 26259117 DOI: 10.1021/acs.langmuir.5b02245] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
An effective strategy has been documented to combine both carbohydrate and amino acid biomolecules in a single synthetic polymeric system via a reversible addition-fragmentation chain transfer (RAFT) polymerization technique. The resultant unique block copolymer was engineered to form uniform micelles with the desired projection of either selective or both amino acid/sugar residues on the outer surface with multivalency, providing pH-based stimuli-responsiveness and/or lectin recognition. The self-assembly process was studied in detail by field emission scanning electron microscopy (FE-SEM), dynamic light scattering (DLS), and UV-visible spectroscopy. The enhanced lectin binding behavior was observed for glyconanoparticles with both amino acid/sugar entities on the shell as compared to the only glycopolymer nanoparticle because of the higher steric hindrance factor in the case of only the glycopolymer nanoparticle. Fluorophore conjugation by postpolymerization functionalization was further exploited by fluorescence spectroscopy for evidencing the lectin recognition process.
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Affiliation(s)
- Sonu Kumar
- Department of Chemical Sciences, Polymer Research Centre, Indian Institute of Science Education and Research Kolkata ,Mohanpur 741246, Nadia, West Bengal, India
| | - Binoy Maiti
- Department of Chemical Sciences, Polymer Research Centre, Indian Institute of Science Education and Research Kolkata ,Mohanpur 741246, Nadia, West Bengal, India
| | - Priyadarsi De
- Department of Chemical Sciences, Polymer Research Centre, Indian Institute of Science Education and Research Kolkata ,Mohanpur 741246, Nadia, West Bengal, India
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29
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Narayanan A, Maiti B, De P. Exploring the post-polymerization modification of side-chain amino acid containing polymers via Michael addition reactions. REACT FUNCT POLYM 2015. [DOI: 10.1016/j.reactfunctpolym.2015.04.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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30
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Abstract
In this study, covalently cross-linked thermoresponsive hydrogels were prepared with higher mechanical stability by the introduction of polyhedral oligomeric silsesquioxane (POSS) moieties.
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Affiliation(s)
- Ujjal Haldar
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur – 741246, Nadia
- India
| | - Mridula Nandi
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur – 741246, Nadia
- India
| | - Binoy Maiti
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur – 741246, Nadia
- India
| | - Priyadarsi De
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur – 741246, Nadia
- India
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31
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Abstract
Side-chain l-methionine containing polymers show the ability to donate a methyl group in the absence of a methyltransferase enzyme, which confirms their enzyme-like activity.
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Affiliation(s)
- Lakshmi Priya Datta
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur 741246, Nadia
- India
| | - Binoy Maiti
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur 741246, Nadia
- India
| | - Priyadarsi De
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur 741246, Nadia
- India
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32
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Shetty M, Maiti B, Venugopal MN, Karunasagar I, Karunasagar I. First isolation and characterization of Edwardsiella tarda from diseased striped catfish, Pangasianodon hypophthalmus (Sauvage). J Fish Dis 2014; 37:265-271. [PMID: 24344765 DOI: 10.1111/jfd.12039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 03/10/2012] [Accepted: 03/11/2012] [Indexed: 06/03/2023]
Affiliation(s)
- M Shetty
- Department of Fishery Microbiology, UNESCO-MIRCEN for Marine Biotechnology, Karnataka Veterinary, Animal and Fisheries Sciences University, College of Fisheries, Mangalore, India
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33
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Maiti B, Kumar S, De P. Controlled RAFT synthesis of side-chain oleic acid containing polymers and their post-polymerization functionalization. RSC Adv 2014. [DOI: 10.1039/c4ra08872g] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report the synthesis and characterization of well-defined polymers from oleic acid as the bio-renewable resource. Double bonds in oleate side-chains in the polymer are further modified by thiol-ene reaction, epoxidation, and cross-linking.
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Affiliation(s)
- Binoy Maiti
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur - 741246, India
| | - Sonu Kumar
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur - 741246, India
| | - Priyadarsi De
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur - 741246, India
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34
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Maiti B, De P. RAFT polymerization of fatty acid containing monomers: controlled synthesis of polymers from renewable resources. RSC Adv 2013. [DOI: 10.1039/c3ra45541f] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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35
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Ghosh S, Pratihar D, Maiti B, Das P. Identification of flow regimes using conductivity probe signals and neural networks for counter-current gas–liquid two-phase flow. Chem Eng Sci 2012. [DOI: 10.1016/j.ces.2012.08.042] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Maiti B, Kundranda MN, Spiro TP, Daw HA. The association of metabolic syndrome with triple-negative breast cancer. Breast Cancer Res Treat 2009; 121:479-83. [PMID: 19851862 DOI: 10.1007/s10549-009-0591-y] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Accepted: 10/08/2009] [Indexed: 01/15/2023]
Abstract
Metabolic syndrome, a conglomerate of obesity, insulin resistance, dyslipidemia, and hypertension has been linked with an increased risk of breast cancer. We investigated the possible association of highly aggressive triple-negative breast cancer and the metabolic syndrome. Information on metabolic syndrome components and tumor characteristics were reviewed in a cohort of 176 patients (including 86 triple-negatives). Retrospective comparison was performed using Pearson Chi-square test or Student's t test for data analysis. A statistically significant association of triple-negative breast cancer with the metabolic syndrome was observed. In accordance with the NCEP (National Cholesterol Education Program) definition, 58.1% of triple-negative patients had metabolic syndrome compared to only 36.7% of non-triple-negative patients (P = 0.004). Consistently, by the AACE (American Association of Clinical Endocrinologists) criteria, 52.3% of triple-negative patients had metabolic syndrome as compared to 34.4% of non-triple-negative patients (P = 0.017). Blood glucose, triglyceride, and HDL levels but not hypertension or BMI (body mass index) showed significant independent association with triple-negative breast cancer. Additionally, triple-negative tumors displayed a significantly higher histological grade and relative paucity of ductal carcinoma in situ (DCIS) when compared to the non-triple-negative tumors (P < 0.001). Our study suggests that metabolic syndrome is significantly more prevalent in triple-negative breast cancer patients as opposed to non-triple-negative patients. Furthermore, triple-negative breast cancer showed a significantly higher histological grade and a relative absence of DCIS. Whether the presence of metabolic syndrome preferentially increases the risk of developing triple-negative-breast cancer remains to be elucidated with future prospective studies.
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Affiliation(s)
- B Maiti
- Department of Internal Medicine, Fairview Hospital, a Cleveland Clinic Hospital, Cleveland, OH, USA.
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Abstract
1038 Background: Metabolic syndrome, a conglomerate of obesity, insulin resistance, hypertriglyceridemia, low HDL (high density lipoprotein), and hypertension is associated with an increased risk of breast cancer. However, no clear association has been shown between the highly aggressive triple-negative breast cancer and metabolic syndrome. Methods: In a retrospective review we compared triple-negative and non-triple-negative breast cancer cases for the presence of metabolic syndrome by NCEP (National Cholesterol Education Program) or AACE (American Association of Clinical Endocrinologists) definitions. Data on metabolic syndrome criteria, tumor size, grade, lymph node status, and ductal carcinoma in situ (DCIS) were reviewed. Chi-square test or Student's t-test was used for data analysis. Results: The entire cohort of 176 patients (12.5% African-American) with median age 56.5 years (range 26–91 years) comprised of 86 triple-negative cases and 90 non-triple-negative cases. A statistically significant association of triple-negative breast cancer with metabolic syndrome was observed. According to the NCEP criteria 58.1% of triple negative patients had metabolic syndrome as compared to only 36.7% of non-triple negative patients (p = 0.004). Consistently, by the AACE criteria 52.3% of triple negative patients had metabolic syndrome as compared to 34.4% of non-triple negative patients (p = 0.017). Contrary to blood glucose, triglyceride, or HDL levels, which independently showed significant association with triple-negative breast cancer, hypertension, or BMI showed no independent association. Additionally, triple-negative tumors displayed a significantly higher histologic grade and relative paucity of ductal carcinoma in situ (DCIS) when compared to the non-triple negative tumors (p < 0.001). Conclusions: The data suggests that the metabolic syndrome is significantly more prevalent in triple-negative breast cancer patients when compared to the non-triple-negative patients. Additionally, triple-negative breast cancer showed a significantly higher histologic grade and a relative absence of DCIS. Whether the presence of metabolic syndrome preferentially increases the risk of developing triple-negative-breast cancer needs to be elucidated by future prospective studies. No significant financial relationships to disclose.
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Affiliation(s)
- B. Maiti
- Cleveland Clinic Cancer Center Fairview Hospital, Cleveland, OH; Cleveland Clinic, Cleveland, OH
| | - M. N. Kundranda
- Cleveland Clinic Cancer Center Fairview Hospital, Cleveland, OH; Cleveland Clinic, Cleveland, OH
| | - T. Jin
- Cleveland Clinic Cancer Center Fairview Hospital, Cleveland, OH; Cleveland Clinic, Cleveland, OH
| | - T. P. Spiro
- Cleveland Clinic Cancer Center Fairview Hospital, Cleveland, OH; Cleveland Clinic, Cleveland, OH
| | - H. A. Daw
- Cleveland Clinic Cancer Center Fairview Hospital, Cleveland, OH; Cleveland Clinic, Cleveland, OH
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Maiti B, Raghunath P, Karunasagar I, Karunasagar I. Cloning and expression of an outer membrane protein OmpW of Aeromonas hydrophila and study of its distribution in Aeromonas spp. J Appl Microbiol 2009; 107:1157-67. [PMID: 19426281 DOI: 10.1111/j.1365-2672.2009.04296.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS The main aims of this study were to clone and express an outer membrane protein (OMP), OmpW, of Aeromonas hydrophila and to study its distribution in Aeromonas spp. METHODS AND RESULTS The gene encoding OmpW in A. hydrophila has been cloned and expressed in Escherichia coli. Primers were designed for amplification of full-length ompW gene and used for identification of this gene in different Aeromonas spp. Of the 42 Aeromonas strains tested, all the isolates were positive by polymerase chain reaction (PCR) except one strain of Aeromonas veronii biovar veronii (VTE338). None of the other gram-negative bacteria were positive by PCR with primers specific to ompW gene of A. hydrophila. Polyclonal antibodies were raised in rabbit against the purified recombinant protein and the reaction of these antibodies was confirmed by western blotting using the purified recombinant protein and 42 Aeromonas cultures grown at various salt concentrations. CONCLUSIONS The ompW-based PCR method developed in this study was found to be 100% specific and 97% sensitive. Expression of OmpW protein of Aeromonas was found to be salt-dependant. Recombinant OmpW protein was found to be highly immunogenic in fish. SIGNIFICANCE AND IMPACT OF THE STUDY To our knowledge, this is the first report on cloning and expression of OmpW protein of A. hydrophila. Full-length ompW gene amplification by PCR can be used for the detection of Aeromonas. Recombinant OmpW protein can be useful for vaccination of fish against Aeromonas spp.
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Affiliation(s)
- B Maiti
- Department of Fishery Microbiology, Karnataka Veterinary, Animal and Fisheries Sciences University, College of Fisheries, Mangalore 575 002, India
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Schessl J, Zou Y, McGrath MJ, Cowling BS, Maiti B, Chin SS, Sewry C, Battini R, Hu Y, Cottle DL, Rosenblatt M, Spruce L, Ganguly A, Kirschner J, Judkins AR, Golden JA, Goebel HH, Taratuto AL, Muntoni F, Flanigan KM, Mitchell CA, Bönnemann CG. Proteomic identification of the LIM domain protein FHL1 as the gene-product mutated in reducing body myopathy. KLIN NEUROPHYSIOL 2009. [DOI: 10.1055/s-0029-1216187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Maiti B, Ferreiro A, Richard P, Flanigan K, Howard M. C.P.2.09 Patient missense mutations near the SEPN1 UGA-SEC codon can alter selenocysteine incorporation. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Maiti B, Howard M, Flanigan K. G.P.3.08 Missense mutations in the dystrophin ZZ domain: Effects beyond beta dystroglycan binding? Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Swami SB, Das S, Maiti B. Convective hot air drying and quality characteristics of bori: A traditional Indian nugget prepared from black gram pulse batter. J FOOD ENG 2007. [DOI: 10.1016/j.jfoodeng.2006.01.064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Roy DR, Parthasarathi R, Maiti B, Subramanian V, Chattaraj PK. Electrophilicity as a possible descriptor for toxicity prediction. Bioorg Med Chem 2005; 13:3405-12. [PMID: 15848752 DOI: 10.1016/j.bmc.2005.03.011] [Citation(s) in RCA: 126] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2005] [Revised: 03/02/2005] [Accepted: 03/02/2005] [Indexed: 11/18/2022]
Abstract
Electrophilicity is one of the cardinal chemical reactivity descriptors successfully employed in various molecular reactivity studies within a structure-activity relationship parlance. The applications of this quantity in the modeling of toxicological properties have inspired us to perform a more exhaustive study in order to test and/or to validate the application of electrophilicity in assessing its chemical and toxicological potential. For this reason the toxicity of a large data set of molecules comprising 252 aliphatic compounds on the Tetrahymena pyriformis is studied. A quantitative structure-activity relationship analysis enabled us to model toxicity in terms of global and local electrophilicities, which provide a reasonably good prediction of aliphatic toxicity. It is heartening to note that the global and local electrophilicity values together can explain the toxicity of a large variety of aliphatic compounds nicely without resorting to any other descriptor or other microscopic/macroscopic physicochemical properties as is the situation in all other QSAR studies.
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Affiliation(s)
- D R Roy
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India
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Venkatesh K, Maiti B. Preconcentration and Separation of Uranium from Thorium by Solid Phase Extraction with XAD‐4 Modified with Organic Reagents. SEP SCI TECHNOL 2005. [DOI: 10.1081/ss-120030784] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
A simple, rapid and accurate method for the determination of chloride in magnesium metal has been developed. The quantitative determination of chloride was accomplished by anion exchange chromatography with conductometric determination. A Metrosep Anion Dual 2 analytical column connected in series with a Metrosep RP guard column was used for chloride separation. A solution containing a mixture of 1.3 mM Na2CO3 and 2 mM NaHCO3 was used as eluent. The method requires a sample dissolution using nitric acid. The limit of detection for the determination of chloride is 50 mg kg(-1) and the relative standard deviation was 5% for the overall method. The recovery of chloride added was 99-102%. No interference was observed from either the closely eluting "system peak" or the nitrate peak in the determination of chloride.
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Braunstein M, Adler-Golden S, Maiti B, Schatz GC. Quantum and classical studies of the O(3P)+H2(v=0–3,j=0)→OH+H reaction using benchmark potential surfaces. J Chem Phys 2004; 120:4316-23. [PMID: 15268601 DOI: 10.1063/1.1642580] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present results of time-dependent quantum mechanics (TDQM) and quasiclassical trajectory (QCT) studies of the excitation function for O(3P) + H2(v = 0-3,j = 0) --> OH + H from threshold to 30 kcal/mol collision energy using benchmark potential energy surfaces [Rogers et al., J. Phys. Chem. A 104, 2308 (2000)]. For H2(v = 0) there is excellent agreement between quantum and classical results. The TDQM results show that the reactive threshold drops from 10 kcal/mol for v = 0 to 6 for v = 1, 5 for v = 2 and 4 for v = 3, suggesting a much slower increase in rate constant with vibrational excitation above v = 1 than below. For H2(v > 0), the classical results are larger than the quantum results by a factor approximately 2 near threshold, but the agreement monotonically improves until they are within approximately 10% near 30 kcal/mol collision energy. We believe these differences arise from stronger vibrational adiabaticity in the quantum dynamics, an effect examined before for this system at lower energies. We have also computed QCT OH(v',j') state-resolved cross sections and angular distributions. The QCT state-resolved OH(v') cross sections peak at the same vibrational quantum number as the H2 reagent. The OH rotational distributions are also quite hot and tend to cluster around high rotational quantum numbers. However, the dynamics seem to dictate a cutoff in the energy going into OH rotation indicating an angular momentum constraint. The state-resolved OH distributions were fit to probability functions based on conventional information theory extended to include an energy gap law for product vibrations.
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Affiliation(s)
- M Braunstein
- Spectral Sciences, Incorporated, Burlington, Massachusetts 01803, USA.
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Chattaraj PK, Maiti B. Regioselectivity in the Chemical Reactions between Molecules and Protons: A Quantum Fluid Density Functional Study. J Phys Chem A 2004. [DOI: 10.1021/jp035156a] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- P. K. Chattaraj
- Department of Chemistry, Indian Institute of Technology, Kharagpur - 721 302, India
| | - B. Maiti
- Department of Chemistry, Indian Institute of Technology, Kharagpur - 721 302, India
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