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Sivakumar G, Gupta A, Babu A, Sasmal PK, Maji S. Nitrodopamine modified MnO 2 NS-MoS 2QDs hybrid nanocomposite for the extracellular and intracellular detection of glutathione. J Mater Chem B 2024. [PMID: 38655674 DOI: 10.1039/d3tb03068g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
We have developed a highly sensitive and reliable fluorescence resonance energy transfer (FRET) probe using nitro-dopamine (ND) and dopamine (DA) coated MnO2 nanosheet (ND@MnO2 NS and DA@MnO2 NS) as an energy acceptor and MoS2 quantum dots (QDs) as an energy donor. By employing surface-modified MnO2 NS, we can effectively reduce the fluorescence intensity of MoS2 QDs through FRET. It can reduce MnO2 NS to Mn2+ and facilitate the fluorescence recovery of the MoS2 QDs. This ND@MnO2 NS@MoS2 QD-based nanoprobe demonstrates excellent sensitivity to GSH, achieving an LOD of 22.7 nM in an aqueous medium while exhibiting minimal cytotoxicity and good biocompatibility. Moreover, our sensing platform shows high selectivity to GSH towards various common biomolecules and electrolytes. Confocal fluorescence imaging revealed that the nanoprobe can image GSH in A549 cells. Interestingly, the ND@MnO2 NS nanoprobe demonstrates no cytotoxicity in living cancer cells, even at concentrations up to 100 μg mL-1. Moreover, the easy fabrication and eco-friendliness of ND@MnO2 NS make it a rapid and simple method for detecting GSH. We envision the developed nanoprobe as an incredible platform for real-time monitoring of GSH levels in both extracellular and intracellular mediums, proving valuable for biomedical research and clinical diagnostics.
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Affiliation(s)
- Gomathi Sivakumar
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology (SRMIST), Kattankulathur, Tamil Nadu-603203, India.
| | - Ajay Gupta
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India.
| | - Anashwara Babu
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology (SRMIST), Kattankulathur, Tamil Nadu-603203, India.
| | - Pijus K Sasmal
- School of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India.
| | - Samarendra Maji
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology (SRMIST), Kattankulathur, Tamil Nadu-603203, India.
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Prathibha T, Kumar S, Chandra S, Maji S, Ramanathan N. The Complexation of Lanthanides by Glycolamide Extractants: Evidences from Electronic Spectroscopy and DFT Calculations. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121396] [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: 01/19/2023]
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3
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Samanta N, Kumar S, Maji S, Chandra M, Venkatesh P, Jain A. Electrochemical and spectroscopic analysis of thermochemical conversion of UO2 to UCl3 using AlCl3 and Al in LiCl–KCl eutectic. Progress in Nuclear Energy 2022. [DOI: 10.1016/j.pnucene.2022.104429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Babu A, Sivakumar G, Das A, Bharti D, Qureshi D, Habibullah SK, Satheesan A, Mohanty B, Pal K, Maji S. Preparation and Characterization of Novel Oleogels Using Jasmine Floral Wax and Wheat Germ Oil for Oral Delivery of Curcumin. ACS Omega 2022; 7:30125-30136. [PMID: 36061661 PMCID: PMC9434628 DOI: 10.1021/acsomega.2c03201] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 08/04/2022] [Indexed: 05/31/2023]
Abstract
Oleogels (OGs) have gained a lot of interest as a delivery system for a variety of pharmaceuticals. The current study explains the development of jasmine floral wax (JFW) and wheat germ oil (WGO)-based OGs for oral drug (curcumin) delivery application. The OGs were made by dissolving JFW in WGO at 70 °C and cooling it to room temperature (25 °C). The critical gelation concentration of JFW that induces the gelation of WGO was found to be 10% (w/w). The OGs were characterized using various techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), microscopic analysis, and mechanical test. XRD data indicated that JFW influences the crystallinity of the OGs. Among the prepared OGs, OG 17.5 showed higher crystallization in the series. Optical microscopic studies demonstrated the formation of fiber structures due to the entanglement of crystals whereas, polarized light micrographs suggested the formation of spherulites or clustered crystallite structures. The mechanical properties of the OGs increased linearly with the increase in the JFW concentration. Curcumin-loaded OGs were examined for their controlled release applications. In summary, the developed OGs were found to have the necessary features for modulating the oral delivery of curcumin.
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Affiliation(s)
- Anashwara Babu
- Department
of Chemistry, SRM Institute of Science and
Technology, Kattankulathur, Chennai 603203, India
| | - Gomathi Sivakumar
- Department
of Chemistry, SRM Institute of Science and
Technology, Kattankulathur, Chennai 603203, India
| | - Anubhab Das
- Department
of Chemistry, SRM Institute of Science and
Technology, Kattankulathur, Chennai 603203, India
| | - Deepti Bharti
- Department
of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha 769008, India
| | - Dilshad Qureshi
- Department
of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha 769008, India
| | - SK Habibullah
- Institute
of Pharmacy and Technology, Salipur, Odisha 754202, India
| | - Anjana Satheesan
- Department
of Chemistry, SRM Institute of Science and
Technology, Kattankulathur, Chennai 603203, India
| | | | - Kunal Pal
- Department
of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha 769008, India
| | - Samarendra Maji
- Department
of Chemistry, SRM Institute of Science and
Technology, Kattankulathur, Chennai 603203, India
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Kumar S, Maji S, Sundararajan K. Enhanced luminescence of tris(carboxylato)uranyl(VI) complexes and energy transfer to Eu(III): a combined spectroscopic and theoretical investigation. Dalton Trans 2022; 51:9803-9817. [PMID: 35708002 DOI: 10.1039/d2dt00849a] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Complex formation between uranyl and carboxylate ligands (benzoate, nicotinate and isonicotinate) has been studied extensively by absorption and luminescence spectroscopy in acetonitrile medium. Experimental data had indicated the existence of stable and enhanced luminescent tris(carboxylato) uranyl(VI) complexes i.e. [UO2(L)3]- with D3h symmetry. The high luminescence of these complexes was due to the sensitization of the Oyl → U ligand to metal charge transfer (LMCT) emission by extremely intense equatorial (carboxylate ligands) LMCT bands. The variation in the experimentally observed parameters such as intensity of equatorial LMCT bands, luminescence lifetimes, quantum yields and structural parameters among tris(carboxylato) uranyl(VI) complexes are affirmed by quantum chemical calculations using density functional theory and the computational results are found to be in good agreement with experimental findings. Interestingly, in a very dilute mixture of [UO2(L)3]- and Eu(III), energy transfer from uranyl to Eu(III) is observed and it leads to the detection of europium at trace levels. This is an intriguing observation as none of the previous studies have reported such a low level of detection limit of Eu(III) by means of energy transfer from any metal.
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Affiliation(s)
- Satendra Kumar
- Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India. .,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400 094, India
| | - S Maji
- Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
| | - K Sundararajan
- Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India. .,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400 094, India
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Mohammed M. Ways T, Filippov SK, Maji S, Glassner M, Cegłowski M, Hoogenboom R, King S, Man Lau W, Khutoryanskiy VV. Mucus-penetrating nanoparticles based on chitosan grafted with various non-ionic polymers: synthesis, structural characterisation and diffusion studies. J Colloid Interface Sci 2022; 626:251-264. [DOI: 10.1016/j.jcis.2022.06.126] [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] [Received: 03/15/2022] [Revised: 06/13/2022] [Accepted: 06/24/2022] [Indexed: 11/28/2022]
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Samanta N, Chandra M, Maji S, Venkatesh P, Annapoorani S, Jain A. Studying Thermochemical Conversion of Sm<sub>2</sub>O<sub>3</sub> to SmCl<sub>3</sub> using AlCl<sub>3</sub> in LiCl-KCl Eutectic Melt. J ELECTROCHEM SCI TE 2022. [DOI: 10.33961/jecst.2021.00934] [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: 11/24/2022]
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Latha R, Mukherjee A, Dahiya K, Bano S, Pawar P, Kalbande R, Maji S, Beig G, Murthy BS. On the varied emission fingerprints of particulate matter over typical locations of NCR (Delhi) - A perspective for mitigation plans. J Environ Manage 2022; 311:114834. [PMID: 35287076 DOI: 10.1016/j.jenvman.2022.114834] [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] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 03/01/2022] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
Source apportionment study of PM2.5 using positive matrix factorization was performed to identify the emission characteristic from different sectors (sub-urban residential, industrial and rapidly urbanizing) of Delhi during winter. Chemical characterization of PM2.5 included metals (Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb and Zn), water soluble ionic compounds (WSICs) (Cl-, NO3-, SO42- and NH4+) and Carbon partitions (OC, EC). Particulates (PM2.5) were collected on filter twice daily for stable and unstable atmospheric conditions, at the locations with specific characteristics, viz. Ayanagar, Noida and Okhla. Ions solely occupied 50% of the total PM2.5 concentration. Irrespective of location, high correlation between OC and EC (0.871-0.891) at p ≤ 0.1 is observed. Relatively lower ratio of NO3/SO4 at Ayanagar (0.696) and Okhla (0.84) denotes predominance of emission from stationary sources rather than mobile sources like that observed at Noida (1.038). Using EPA PMF5.0, optimum factors for each location are fixed based on error estimation (EE). Crustal dust, vehicular emission, biomass burning and secondary aerosol are the major contributing sources in all the three locations. Incineration contributes about 19% at Ayanagar and 18% at Okhla. Metal industries in Okhla contribute about 19% to PM2.5. These specific local emissions with considerable potency are to be targeted for long-term policymaking. Considerable secondary aerosol contribution (15%-24%) indicates that gaseous emissions also need to be reduced to improve air quality.
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Affiliation(s)
- R Latha
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India.
| | - A Mukherjee
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
| | - K Dahiya
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
| | - S Bano
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
| | - P Pawar
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
| | - R Kalbande
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
| | - S Maji
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
| | - G Beig
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
| | - B S Murthy
- Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India
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Venkata Sravani V, Tripathi S, Sreenivasulu B, Kumar S, Maji S, Brahmmananda Rao CVS, Suresh A, Sivaraman N. Post synthetically modified IRMOF-3 for efficient recovery and selective sensing of U(vi) from aqueous medium. RSC Adv 2021; 11:28126-28137. [PMID: 35480724 PMCID: PMC9037992 DOI: 10.1039/d1ra02971a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 08/12/2021] [Indexed: 01/19/2023] Open
Abstract
A simple and efficient route to develop various novel functionalized MOF materials for rapid and excellent recovery of U(vi) from aqueous medium, along with selective sensing has been demonstrated in the present study. In this connection, a set of four distinct post synthetically modified (PSM) iso-reticular metal organic frameworks were synthesized from IRMOF-3 namely, IRMOF-PC (2-pyridine carboxaldehyde), IRMOF-GA (glutaric anhydride), IRMOF-SMA (sulfamic acid), and IRMOF-DPC (diphenylphosphonic chloride) for the recovery and sensing of U(vi) from aqueous medium. The MOFs were characterized by Fourier transform infrared spectroscopy (FTIR), powder XRD, BET surface area analysis, thermogravimetric analysis (TGA), NMR (13C, 1H and 31P), Scanning Electron Microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). Among all MOFs, post synthetically modified IRMOF-SMA showed enhanced thermal stability of about 420 °C. The MOFs were investigated for U(vi) sorption studies using a batch technique. All the MOFs exhibit excellent sorption capacity towards U(vi) (>90%) and maximum uptake was observed at pH 6. Sorption capacity of MOFs have the following order; IRMOF-3-DPC (300 mg U g-1) > IRMOF-SMA (292 mg U g-1) > IRMOF-PC (289 mg U g-1) > IRMOF-GA (280 mg U g-1) > IRMOF-3 (273 mg U g-1). IRMOF-DPC shows rapid sorption of uranium within 5 min with excellent uptake of U(vi) (>99%). The desorption of U(vi) was examined with different eluents and 0.01 M HNO3 was found to be most effective. The fluorescence sensing studies of U(vi) via IRMOF-3 and its PSM MOFs revealed high sensitivity and selectivity towards U(vi) over other competing rare earth metal ions (La3+, Ce4+, Sm3+, Nd3+, Gd3+, and Eu3+), wherein IRMOF-GA displayed an impressive detection limit of 0.36 mg L-1 for U(vi).
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Affiliation(s)
- V Venkata Sravani
- Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research Kalpakkam 603102 Tamil Nadu India.,Material Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research Kalpakkam-603 102 Tamil Nadu India +91 44 27480500, ext. 24028
| | - Sarita Tripathi
- Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research Kalpakkam 603102 Tamil Nadu India.,Material Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research Kalpakkam-603 102 Tamil Nadu India +91 44 27480500, ext. 24028
| | - B Sreenivasulu
- Material Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research Kalpakkam-603 102 Tamil Nadu India +91 44 27480500, ext. 24028
| | - Satendra Kumar
- Material Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research Kalpakkam-603 102 Tamil Nadu India +91 44 27480500, ext. 24028
| | - S Maji
- Material Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research Kalpakkam-603 102 Tamil Nadu India +91 44 27480500, ext. 24028
| | - C V S Brahmmananda Rao
- Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research Kalpakkam 603102 Tamil Nadu India.,Material Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research Kalpakkam-603 102 Tamil Nadu India +91 44 27480500, ext. 24028
| | - A Suresh
- Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research Kalpakkam 603102 Tamil Nadu India.,Material Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research Kalpakkam-603 102 Tamil Nadu India +91 44 27480500, ext. 24028
| | - N Sivaraman
- Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research Kalpakkam 603102 Tamil Nadu India.,Material Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research Kalpakkam-603 102 Tamil Nadu India +91 44 27480500, ext. 24028
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Kumar S, Maji S, Sundararajan K. Nd(III) hypersensitive peak as an optical absorption probe for determining nitric acid in aqueous solution: An application to aqueous raffinate solutions in nuclear reprocessing. Talanta 2021; 231:122398. [PMID: 33965048 DOI: 10.1016/j.talanta.2021.122398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 02/11/2021] [Revised: 03/31/2021] [Accepted: 04/01/2021] [Indexed: 10/21/2022]
Abstract
A new method using Nd(III) absorption peak as a probe is described for the measurement of nitric acid concentration in aqueous solution. The hypersensitive peak of Nd(III) at 575.1 nm shows a substantial enhancement in the absorbance in comparison to other absorption peaks with increasing nitric acid concentration. The integrated area and absorbance of this hypersensitive peak show a linear dependency over a large dynamic range of 0.5-15.5 M of nitric acid. A methodology for the correction of spectral interference to the probing absorption peak of Nd(III) is also reported. The method is applied for the measurement of nitric acid in synthetic high level liquid waste solution and shown to be comparable to that obtained by titrimetric method. The present method can be easily adopted for the measurement of nitric acid concentration in aqueous raffinate solutions of nuclear reprocessing streams.
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Affiliation(s)
- Satendra Kumar
- Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, India.
| | - S Maji
- Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, India
| | - K Sundararajan
- Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, India; Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, India
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Qureshi D, Sahoo A, Mohanty B, Anis A, Kulikouskaya V, Hileuskaya K, Agabekov V, Sarkar P, Ray SS, Maji S, Pal K. Fabrication and Characterization of Poly (vinyl alcohol) and Chitosan Oligosaccharide-Based Blend Films. Gels 2021; 7:55. [PMID: 34066326 PMCID: PMC8162339 DOI: 10.3390/gels7020055] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 03/13/2021] [Accepted: 04/21/2021] [Indexed: 02/02/2023] Open
Abstract
In the present study, we report the development of poly (vinyl alcohol) (PVA) and chitosan oligosaccharide (COS)-based novel blend films. The concentration of COS was varied between 2.5-10.0 wt% within the films. The inclusion of COS added a brown hue to the films. FTIR spectroscopy revealed that the extent of intermolecular hydrogen bonding was most prominent in the film that contained 5.0 wt% of COS. The diffractograms showed that COS altered the degree of crystallinity of the films in a composition-dependent manner. As evident from the thermal analysis, COS content profoundly impacted the evaporation of water molecules from the composite films. Stress relaxation studies demonstrated that the blend films exhibited more mechanical stability as compared to the control film. The impedance profiles indicated the capacitive-dominant behavior of the prepared films. Ciprofloxacin HCl-loaded films showed excellent antimicrobial activity against Escherichia coli and Bacillus cereus. The prepared films were observed to be biocompatible. Hence, the prepared PVA/COS-based blend films may be explored for drug delivery applications.
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Affiliation(s)
- Dilshad Qureshi
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela 769008, India; (D.Q.); (A.S.); (S.S.R.)
| | - Ayasharani Sahoo
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela 769008, India; (D.Q.); (A.S.); (S.S.R.)
| | | | - Arfat Anis
- SABIC Polymer Research Center, Department of Chemical Engineering, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Viktoryia Kulikouskaya
- The Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, 220141 Minsk, Belarus; (V.K.); (K.H.); (V.A.)
| | - Kseniya Hileuskaya
- The Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, 220141 Minsk, Belarus; (V.K.); (K.H.); (V.A.)
| | - Vladimir Agabekov
- The Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, 220141 Minsk, Belarus; (V.K.); (K.H.); (V.A.)
| | - Preetam Sarkar
- Department of Food Process Engineering, National Institute of Technology, Rourkela 769008, India;
| | - Sirsendu Sekhar Ray
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela 769008, India; (D.Q.); (A.S.); (S.S.R.)
| | - Samarendra Maji
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, India
| | - Kunal Pal
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela 769008, India; (D.Q.); (A.S.); (S.S.R.)
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Qureshi D, Pattanaik S, Mohanty B, Anis A, Kulikouskaya V, Hileuskaya K, Agabekov V, Sarkar P, Maji S, Pal K. Preparation of novel poly(vinyl alcohol)/chitosan lactate-based phase-separated composite films for UV-shielding and drug delivery applications. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03653-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Gopalakrishnan D, Saravanan S, Merckx R, Madan Kumar A, Khamrang T, Velusamy M, Vasanth K, Sunitha S, Hoogenboom R, Maji S, Ganeshpandian M. N, N-Ru(II)- p-cymene-poly( N-vinylpyrrolidone) surface functionalized gold nanoparticles: from organoruthenium complex to nanomaterial for antiproliferative activity. Dalton Trans 2021; 50:8232-8242. [PMID: 34037018 DOI: 10.1039/d1dt00694k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Organometallic Ru-arene complexes are promising as anticancer agents, but the lack of tumor uptake and poor solubility in the physiological medium impede their development. In order to deal with these challenges, we developed gold nanoparticles coated with Ru(arene)-functionalized PNVP-Py, where PNVP-Py is pyridine end-functionalized poly(N-vinylpyrrolidone). It is demonstrated that these particles exhibit higher anti-proliferative activity than the individual organometallic ruthenium(ii) complex of the type [Ru(η6-p-cymene)(NN)Cl]PF6, where NN is bis(4-methoxyphenylimino)acenaphthene, against colorectal adenocarcinoma cell lines. More specifically, a RuII(η6-p-cymene) complex containing a NN bidentate ligand has been prepared and characterized by spectral studies and X-ray crystallography. To tether the isolated complex onto the surface of the AuNPs, PNVP-Py, which contains a pyridine group at one end to coordinate to the Ru-complex and a suitable functional group at the other end to bind on the surface of the AuNPs, has been prepared and utilized to obtain the macromolecular complex [Ru(η6-p-cymene)(NN)(PNVP-Py)]Cl2. Next, stable Ru(p-cym)(NN)(PNVP-Py)@AuNPs were obtained via a ligand exchange reaction of citrate-stabilized AuNPs with a macromolecular complex by a direct 'grafting to' approach and characterized well. Despite the lower DNA cleavage activity, the nanoconjugate exhibits better cytotoxicity than the individual complex against HT-29 colorectal adenocarcinoma cells on account of its enhanced permeability across the cell membrane. The AO/EB staining assay revealed that the nanoconjugate is able to induce an apoptotic mode of cell death, which was further quantitatively evaluated by Annexin V-FITC/PI double assay. An immunofluorescence assay indicated the higher potency of the nanoconjugate to inhibit cyclin D1 gene expression that is required for cancer cell growth. To the best of our knowledge, this is the first report of the modification of an organometallic Ru(arene) complex into a Ru(arene)metallopolymer-gold nanoconjugate for the development of ruthenium-based nanomedicine for cancer treatment.
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Affiliation(s)
- Durairaj Gopalakrishnan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu, Chennai, TN, India.
| | - S Saravanan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu, Chennai, TN, India.
| | - Ronald Merckx
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, Ghent, Belgium
| | - Arumugam Madan Kumar
- Department of Chemistry, Sathyabama Institute of Science and Technology, Chennai - 600119, India
| | - Themmila Khamrang
- Department of Chemistry, C. I. College, Bishnupur 795126, Manipur, India
| | - Marappan Velusamy
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India
| | - K Vasanth
- Division of Molecular Biology, Interdisciplinary Institute of Indian System of Medicine (IIISM), SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu, Chennai, TN, India
| | - S Sunitha
- Department of Chemistry, Sathyabama Institute of Science and Technology, Chennai - 600119, India
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, Ghent, Belgium
| | - Samarendra Maji
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu, Chennai, TN, India.
| | - Mani Ganeshpandian
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu, Chennai, TN, India.
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Qureshi D, Choudhary B, Mohanty B, Sarkar P, Anis A, Cerqueira MA, Banerjee I, Maji S, Pal K. Graphene Oxide Increases Corneal Permeation of Ciprofloxacin Hydrochloride from Oleogels: A Study with Cocoa Butter-Based Oleogels. Gels 2020; 6:E43. [PMID: 33238509 PMCID: PMC7709633 DOI: 10.3390/gels6040043] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 10/04/2020] [Revised: 11/16/2020] [Accepted: 11/18/2020] [Indexed: 12/14/2022] Open
Abstract
In this work, oleogels of cocoa butter (CB), rice bran oil (RBO), and graphene oxide (GO) were prepared. The prepared oleogels were subjected to various characterization techniques such as bright-field microscopy, X-ray diffraction (XRD), crystallization kinetics, differential scanning calorimetry (DSC), and mechanical studies. The influence of increasing GO content on the in vitro drug release and ex vivo corneal permeation of the model drug (ciprofloxacin HCl-CPH) from the oleogels was also investigated. Bright-field micrographs showed that increment in GO content reduced the size of the globular particles of CB. XRD analysis revealed that CB was crystallized in its β' and β polymorphic forms in the oleogels, which was in agreement with thermal studies. The mechanical characterization demonstrated that the presence of GO improved the elastic nature and stress-bearing properties of the oleogels. Moreover, GO altered the crystallization kinetics of CB in the oleogels in a composition-dependent manner. The in vitro release of CPH from the oleogels occurred through either Fickian diffusion or fat network relaxation or a combination thereof. Furthermore, the inclusion of GO enhanced the ex vivo permeation of CPH molecules across the caprine cornea. Hence, we concluded that the prepared oleogels could be explored as potential delivery systems for ophthalmic applications.
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Affiliation(s)
- Dilshad Qureshi
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela 769008, India;
| | - Barbiee Choudhary
- Amity Institute of Biotechnology, Amity University, Noida 201301, India;
| | | | - Preetam Sarkar
- Department of Food Process Engineering, National Institute of Technology, Rourkela 769008, India;
| | - Arfat Anis
- SABIC Polymer Research Center, Department of Chemical Engineering, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Miguel A. Cerqueira
- International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal;
| | - Indranil Banerjee
- Department of Bioscience and Bioengineering, Indian Institute of Technology, Jodhpur 600036, India;
| | - Samarendra Maji
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, India
| | - Kunal Pal
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela 769008, India;
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Qureshi D, Nayak SK, Maji S, Kim D, Banerjee I, Pal K. Carrageenan: A Wonder Polymer from Marine Algae for Potential Drug Delivery Applications. Curr Pharm Des 2020; 25:1172-1186. [PMID: 31465278 DOI: 10.2174/1381612825666190425190754] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [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: 03/18/2019] [Accepted: 04/15/2019] [Indexed: 01/02/2023]
Abstract
BACKGROUND With the advancement in the field of medical science, the idea of sustained release of the therapeutic agents in the patient's body has remained a major thrust for developing advanced drug delivery systems (DDSs). The critical requirement for fabricating these DDSs is to facilitate the delivery of their cargos in a spatio-temporal and pharmacokinetically-controlled manner. Albeit the synthetic polymer-based DDSs normally address the above-mentioned conditions, their potential cytotoxicity and high cost have ultimately constrained their success. Consequently, the utilization of natural polymers for the fabrication of tunable DDSs owing to their biocompatible, biodegradable, and non-toxic nature can be regarded as a significant stride in the field of drug delivery. Marine environment serves as an untapped resource of varied range of materials such as polysaccharides, which can easily be utilized for developing various DDSs. METHODS Carrageenans are the sulfated polysaccharides that are extracted from the cell wall of red seaweeds. They exhibit an assimilation of various biological activities such as anti-thrombotic, anti-viral, anticancer, and immunomodulatory properties. The main aim of the presented review is threefold. The first one is to describe the unique physicochemical properties and structural composition of different types of carrageenans. The second is to illustrate the preparation methods of the different carrageenan-based macro- and micro-dimensional DDSs like hydrogels, microparticles, and microspheres respectively. Fabrication techniques of some advanced DDSs such as floating hydrogels, aerogels, and 3-D printed hydrogels have also been discussed in this review. Next, considerable attention has been paid to list down the recent applications of carrageenan-based polymeric architectures in the field of drug delivery. RESULTS Presence of structural variations among the different carrageenan types helps in regulating their temperature and ion-dependent sol-to-gel transition behavior. The constraint of low mechanical strength of reversible gels can be easily eradicated using chemical crosslinking techniques. Carrageenan based-microdimesional DDSs (e.g. microspheres, microparticles) can be utilized for easy and controlled drug administration. Moreover, carrageenans can be fabricated as 3-D printed hydrogels, floating hydrogels, and aerogels for controlled drug delivery applications. CONCLUSION In order to address the problems associated with many of the available DDSs, carrageenans are establishing their worth recently as potential drug carriers owing to their varied range of properties. Different architectures of carrageenans are currently being explored as advanced DDSs. In the near future, translation of carrageenan-based advanced DDSs in the clinical applications seems inevitable.
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Affiliation(s)
- Dilshad Qureshi
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, India
| | - Suraj Kumar Nayak
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, India
| | - Samarendra Maji
- SRM Research Institute, SRM Institute of Science and Technology, Kanchipuram, India
| | - Doman Kim
- Department of International Agricultural Technology & Institute of Green BioScience and Technology, Seoul National University, Gwangwon, Korea
| | - Indranil Banerjee
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, India
| | - Kunal Pal
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, India
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16
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Abstract
Polyampholytes consist of alternating opposite charges were synthesized by alternating RAFT (co)polymerization of cationic and anionic monomers and their pH dependent thermoresponsive behavior in water and alcohol/water solvent mixtures is reported.
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Affiliation(s)
- Samarendra Maji
- Supramolecular Chemistry Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- Ghent
| | - Valentin Victor Jerca
- Supramolecular Chemistry Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- Ghent
| | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- Ghent
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18
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Lahiri S, Banerjee A, Bhutda S, Palaniappan M, Bahubali VH, Manjunath N, Maji S, Siddaiah N. In vitro expression of vital virulent genes of clinical and environmental isolates of Cryptococcus neoformans/gattii in endothelial cells of human blood-brain barrier. J Mycol Med 2019; 29:239-244. [PMID: 31221506 DOI: 10.1016/j.mycmed.2019.06.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 11/03/2018] [Revised: 06/02/2019] [Accepted: 06/04/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND Evaluation of the pathogenesis of clinical and environmental cryptococcal isolates to the central nervous system is necessary for understanding the risk. This study was designed to determine the in vitro expression of six important virulent genes of Cryptococcus neoformans/gattii in Human Brain Microvascular Endothelial cells (hBMEC). METHODS The hBMEC were infected with Cryptococcus to determine invasion and survival rate at 3, 12 and 24hours by subsequent colony count of internalized yeasts. The whole RNA of the intracellular Cryptococcus was extracted to quantify the expression of CAP10, PLB1, ENA1, URE1, LAC1, and MATα genes by real-time quantitative PCR for 3 and 12hours of infection. RESULTS Invasion and survival rates were higher in clinical and standard strains of C. neoformans. A significant difference was observed among the clinical and environmental isolates for the expression of CAP10, ENA1, LAC1, MATα and URE1 at 3hours, and ENA1, LAC1, MATα, PLB1 and URE1 at 12hours. Clinical isolates showed significant upregulation of all the genes except PLB1, which was higher in environmental isolates. Relative expressions at the two time-points showed statistically significant (P=0.043) changes for the clinical isolates and no significance (P=0.063) for environmental isolates. CONCLUSION The C. gattii (VGI) isolates showed significantly lower invasion and survival than C. neoformans (VNI, and VNII) irrespective of their sources. Clinical isolates exhibited higher expression for the majority of the virulent genes until 12hours of infection, probably due to their better adaptation in the host system and enhanced pathogenicity than the environmental counterparts.
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Affiliation(s)
- S Lahiri
- Department of Neuromicrobiology, National Institute of Mental Health & Neuro Sciences (NIMHANS), Bangalore, India
| | - A Banerjee
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Mumbai, India
| | - S Bhutda
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Mumbai, India
| | - M Palaniappan
- Department of Biostatistics, NIMHANS, Bangalore, India
| | - V H Bahubali
- Department of Neuromicrobiology, National Institute of Mental Health & Neuro Sciences (NIMHANS), Bangalore, India
| | - N Manjunath
- Department of Neurology, NIMHANS, Bangalore, India
| | - S Maji
- Department of Neuromicrobiology, National Institute of Mental Health & Neuro Sciences (NIMHANS), Bangalore, India
| | - N Siddaiah
- Department of Neuromicrobiology, National Institute of Mental Health & Neuro Sciences (NIMHANS), Bangalore, India.
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Kumar S, Maji S, Sundararajan K, Sankaran K. Development of a simple spectrophotometric method to estimate uranium concentration in LiCl–KCl matrix. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06471-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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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20
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Kasthuri S, Gawas P, Maji S, Veeraiah N, Venkatramaiah N. Selective Detection of Trinitrophenol by Amphiphilic Dimethylaminopyridine-Appended Zn(II)phthalocyanines at the Near-Infrared Region. ACS Omega 2019; 4:6218-6228. [PMID: 31459764 PMCID: PMC6648911 DOI: 10.1021/acsomega.8b02394] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Accepted: 03/25/2019] [Indexed: 06/10/2023]
Abstract
Novel amphiphilic Zn(II)phthalocyanines (ZnPcs) peripherally substituted with four and eight dimethylaminopyridinium units (ZnPc1 and ZnPc2) were synthesized by cyclotetramerization of the corresponding phthalonitriles. The effect of aggregation and photophysical (fluorescence quantum yields and lifetimes) and photochemical (singlet oxygen generation and photodegradation under light irradiation) properties was investigated. The chemosensing ability of ZnPcs toward explosive nitroaromatic compounds was explored in aqueous medium. This study demonstrates that ZnPc1 and ZnPc2 show fluorescence quenching behavior upon interaction with different nitro analytes and show unprecedented selectivity toward 2,4,6-trinitrophenol with a limit of detection (LOD) of 0.7-1.1 ppm with a high quenching rate constant (K sv) of 1.6-2.02 × 105. The near-infrared (NIR) fluorescence in thin films was quenched efficiently because of the photoinduced electron-transfer process through strong intermolecular π-π and electrostatic interactions. The sensing process is highly reversible and free from the interference of other commonly encountered nitro analytes. Further, experiments were performed to demonstrate the use of ZnPcs as efficient heterogeneous photocatalysts in the reduction of nitro explosives. The smart dual performance of multicharged ZnPcs in aqueous media quantifies them as attractive candidates in developing sensor materials at the NIR region and to possibly convert the toxic explosives into useful scaffolds. These results provide an interesting perspective toward elaboration of stable fluorescent systems for the selective sensing behavior of nitro explosives and their facile heterogeneous catalytic behavior in the reduction reactions.
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Affiliation(s)
- S. Kasthuri
- Department
of Chemistry, SRM Institute of Science and
Technology (SRMIST), Chennai 603 203, India
| | - Pratiksha Gawas
- Department
of Chemistry, SRM Institute of Science and
Technology (SRMIST), Chennai 603 203, India
| | - Samarendra Maji
- Department
of Chemistry, SRM Institute of Science and
Technology (SRMIST), Chennai 603 203, India
| | - N. Veeraiah
- Department
of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur 522 510, Andhra Pradesh, India
| | - N. Venkatramaiah
- Department
of Chemistry, SRM Institute of Science and
Technology (SRMIST), Chennai 603 203, India
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21
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Satapathy M, Quereshi D, Hanh Nguyen TT, Pani D, Mohanty B, Anis A, Maji S, Kim D, Sarkar P, Pal K. Preparation and characterization of cocoa butter and whey protein isolate based emulgels for pharmaceutical and probiotics delivery applications. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1583577] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Monalisha Satapathy
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, India
| | - Dilshad Quereshi
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, India
| | - Thi Thanh Hanh Nguyen
- Department of International Agricultural Technology & Institute of Green Bioscience and Technology, Seoul National University, Seoul, Republic of Korea
| | | | | | - Arfat Anis
- Department of Chemical Engineering, King Saud University, Riyadh, Saudi Arabia
| | - Samarendra Maji
- Department of Chemistry and Research Institute, SRM Institute of Science and Technology (SRMIST), Kattankulathur, Chennai, India
| | - Doman Kim
- Department of International Agricultural Technology & Institute of Green Bioscience and Technology, Seoul National University, Seoul, Republic of Korea
| | - Preetam Sarkar
- Department of Food Process Engineering, National Institute of Technology, Rourkela, India
| | - Kunal Pal
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, India
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22
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Vancoillie G, Van Guyse JFR, Voorhaar L, Maji S, Frank D, Holder E, Hoogenboom R. Understanding the effect of monomer structure of oligoethylene glycol acrylate copolymers on their thermoresponsive behavior for the development of polymeric sensors. Polym Chem 2019. [DOI: 10.1039/c9py01326a] [Citation(s) in RCA: 12] [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]
Abstract
Oligoethylene glycol acrylate (OEGA) polymers are a class of thermoresponsive polymers. Three new OEGA monomer combinations were investigated, which revealed three different types of thermoresponsive behavior as a function of copolymer composition.
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Affiliation(s)
- Gertjan Vancoillie
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Joachim F. R. Van Guyse
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Lenny Voorhaar
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Samarendra Maji
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Daniel Frank
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Elizabeth Holder
- Functional Polymers Group and Institute of Polymer Technology
- University of Wuppertal
- D-42097 Wuppertal
- Germany
| | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
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23
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Kumar S, Maji S, Gopakumar G, Joseph M, Sundararajan K, Sankaran K. Luminescent versus non-luminescent uranyl–picolinate complexes. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-6305-3] [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: 10/28/2022]
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24
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Maji S, Agarwal T, Maiti T. Generation of macroporosity in 3D scaffold using a combined approach of high-speed stirring and freeze-drying method: potentials in bone tissue engineering application. N Biotechnol 2018. [DOI: 10.1016/j.nbt.2018.05.1236] [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: 10/28/2022]
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25
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Maji S, Kumar S, Sundararajan K, Sankaran K. A novel luminescence method for the estimation of uranyl ions using trimesic acid‑cadmium complex. Microchem J 2018. [DOI: 10.1016/j.microc.2018.04.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Kumar S, Maji S, Sundararajan K, Sankaran K. Uranyl tris nitrato as a luminescent probe for trace water detection in acetonitrile. LUMINESCENCE 2018; 33:611-615. [PMID: 29356360 DOI: 10.1002/bio.3453] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 09/06/2017] [Revised: 11/15/2017] [Accepted: 12/13/2017] [Indexed: 11/09/2022]
Abstract
Uranyl tris nitrato i.e. [UO2 (NO3 )3 ]- was formed by adding tetramethylammonium nitrate to uranyl nitrate in acetonitrile medium. The luminescence features of this complex in acetonitrile are very sensitive to water content, which could lead to the use of it as a luminescent probe for water present in acetonitrile. The luminescence intensity ratio of 507 to 467 nm peak of uranyl tris nitrato showed a linear response in the range 0-5% (v/v) water content in acetonitrile. The present method was applied for three synthetic samples of acetonitrile for water detection and the results obtained were compared using Karl Fischer titration. There was a good agreement in the values obtained by both the methods.
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Affiliation(s)
- Satendra Kumar
- Materials Chemistry Division, Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India
| | - S Maji
- Materials Chemistry Division, Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India
| | - K Sundararajan
- Materials Chemistry Division, Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India.,Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research, Kalpakkam, India
| | - K Sankaran
- Materials Chemistry Division, Materials Chemistry & Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India.,Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research, Kalpakkam, India
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Affiliation(s)
- S. Krithika
- Biological Anthropology Unit, Indian Statistical Institute, Kolkata 700108, West Bengal, India
| | - S. Maji
- Biological Anthropology Unit, Indian Statistical Institute, Kolkata 700108, West Bengal, India
| | - T.S. Vasulu
- Biological Anthropology Unit, Indian Statistical Institute, Kolkata 700108, West Bengal, India
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Lahiri Mukhopadhyay S, Mahadevan A, Bahubali VH, Dawn Bharath R, Prabhuraj AR, Maji S, Siddaiah N. A rare case of multiple brain abscess and probably disseminated phaeohyphomycosis due to Cladophialophora bantiana in an immunosuppressed individual from India. J Mycol Med 2017; 27:391-395. [PMID: 28478966 DOI: 10.1016/j.mycmed.2017.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 11/01/2016] [Revised: 03/28/2017] [Accepted: 04/04/2017] [Indexed: 10/19/2022]
Abstract
Cladophialophora bantiana, a dematiaceous neurotropic mold causes rare and lethal brain abscess, commonly in immunocompetent hosts. We report a rare and probably a case of disseminated infection with this black mold in an immunosuppressed individual from India. A 55-year-old diabetic male presented with severe headache, blurred-vision, behavioural abnormalities, eye-pain and ear-discharge. He was undergoing treatment for hypertension, prostatomegaly and obstructive pulmonary disease. He was on steroids for the past six years for uveitis. Haematology reports indicated elevated WBC and platelet count. He was negative for HIV, hepatitis, autoimmune antibodies and tumour markers. CD4 count was within normal limits. Brain magnetic resonance imaging revealed multiple ring-enhancing lesions and oedema in the left tempero-parietal region. Chest X-ray showed irregular consolidations in right paracardiac region and confluence in both lungs. Positron Emission Tomography of whole body revealed multiple lesions in brain, lungs, lymph nodes and C3-vertebrae. Histopathology of the lung lesion showed non-tuberculous infectious pathology and brain lesions showed necrosis with occurrence of pigmented hyphal fungi. The pus aspirated during surgical excision of brain lesions grew black mold, identified as C. bantiana. Although patient was started on intravenous Voriconazole, he succumbed to the infection after 7 days. The lesion was initially suspected to be of tuberculous etiology, and the lesions in lungs were also suggestive of malignancy, which was however ruled out by histopathological examination. Such diagnostic dilemmas are common in the infection caused by Cladophialophora, which can cause treatment delay and death. Early diagnosis is therefore mandatory for the rapid treatment and survival of patients.
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Affiliation(s)
- S Lahiri Mukhopadhyay
- Department of neuromicrobiology, National institute of mental health and neuro sciences (NIMHANS), Bangalore, India
| | - A Mahadevan
- Department of neuropathology, NIMHANS, Bangalore, India
| | - V H Bahubali
- Department of neuromicrobiology, National institute of mental health and neuro sciences (NIMHANS), Bangalore, India
| | - R Dawn Bharath
- Department of neuroimaging & interventional radiology, NIMHANS, Bangalore, India
| | - A R Prabhuraj
- Department of neurosurgery, NIMHANS, Bangalore, India
| | - S Maji
- Department of neuromicrobiology, National institute of mental health and neuro sciences (NIMHANS), Bangalore, India
| | - N Siddaiah
- Department of neuromicrobiology, National institute of mental health and neuro sciences (NIMHANS), Bangalore, India.
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Van Nieuwenhove I, Maji S, Dash M, Van Vlierberghe S, Hoogenboom R, Dubruel P. RAFT/MADIX polymerization of N-vinylcaprolactam in water–ethanol solvent mixtures. Polym Chem 2017. [DOI: 10.1039/c6py02224c] [Citation(s) in RCA: 13] [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: 01/01/2023]
Abstract
The present paper demonstrates the successful RAFT/MADIX polymerization of N-vinylcaprolactam at ambient temperature in water–ethanol mixtures. An optimum was found for a 1 : 1 ratio of water and ethanol as solvent regarding both polymerization rate and insignificant hydrolysis.
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Affiliation(s)
- Ine Van Nieuwenhove
- Polymer Chemistry and Biomaterials – Group Ghent University
- BE-9000 Ghent
- Belgium
| | - Samarendra Maji
- Supramolecular Chemistry Group – Ghent University
- BE-9000 Ghent
- Belgium
| | - Mamoni Dash
- Polymer Chemistry and Biomaterials – Group Ghent University
- BE-9000 Ghent
- Belgium
| | | | | | - Peter Dubruel
- Polymer Chemistry and Biomaterials – Group Ghent University
- BE-9000 Ghent
- Belgium
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31
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Palao-Suay R, Aguilar MR, Parra-Ruiz FJ, Maji S, Hoogenboom R, Rohner NA, Thomas SN, Román JS. Enhanced Bioactivity of α-Tocopheryl Succinate Based Block Copolymer Nanoparticles by Reduced Hydrophobicity. Macromol Biosci 2016; 16:1824-1837. [PMID: 27739627 PMCID: PMC5518931 DOI: 10.1002/mabi.201600259] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Revised: 09/04/2016] [Indexed: 12/25/2022]
Abstract
Well-structured amphiphilic copolymers are necessary to obtain self-assembled nanoparticles (NPs) based on synthetic polymers. Highly homogeneous and monodispersed macromolecules obtained by controlled polymerization have successfully been used for this purpose. However, disaggregation of the organized macromolecules is desired when a bioactive element, such as α-tocopheryl succinate, is introduced in self-assembled NPs and this element must be exposed or released to exert its action. The aim of this work is to demonstrate that the bioactivity of synthetic NPs based on defined reversible addition-fragmentation chain transfer polymerization copolymers can be enhanced by the introduction of hydrophilic comonomers in the hydrophobic segment. The amphiphilic terpolymers are based on poly(ethylene glycol) (PEG) as hydrophilic block, and a hydrophobic block based on a methacrylic derivative of α-tocopheryl succinate (MTOS) and small amounts of 2-hydroxyethyl methacrylate (HEMA) (PEG-b-poly(MTOS-co-HEMA)). The introduction of HEMA reduces hydrophobicity and introduces "disorder" both in the homogeneous blocks and the compact core of the corresponding NPs. These NPs are able to encapsulate additional α-tocopheryl succinate (α-TOS) with high efficiency and their biological activity is much higher than that described for the unmodified copolymers, proposedly due to more efficient degradation and release of α-TOS, demonstrating the importance of the hydrophilic-hydrophobic balance.
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Affiliation(s)
- Raquel Palao-Suay
- Group of Biomaterials, Department of Polymeric Nanomaterials and Biomaterials, Institute of Polymer Science and Technology, CSIC, Juan de la Cierva 3, 28006, Madrid, Spain
- Networking Biomedical Research Centre in Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Av. Monforte de Lemos 3-5, 28029, Madrid, Spain
| | - María Rosa Aguilar
- Group of Biomaterials, Department of Polymeric Nanomaterials and Biomaterials, Institute of Polymer Science and Technology, CSIC, Juan de la Cierva 3, 28006, Madrid, Spain
- Networking Biomedical Research Centre in Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Av. Monforte de Lemos 3-5, 28029, Madrid, Spain
| | - Francisco J Parra-Ruiz
- Group of Biomaterials, Department of Polymeric Nanomaterials and Biomaterials, Institute of Polymer Science and Technology, CSIC, Juan de la Cierva 3, 28006, Madrid, Spain
| | - Samarendra Maji
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000, Ghent, Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, 9000, Ghent, Belgium
| | - Nathan A Rohner
- George W. Woodruff School of Mechanical Engineering and Parker H. Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Dr NW, Atlanta, 30332, GA, USA
| | - Susan N Thomas
- George W. Woodruff School of Mechanical Engineering and Parker H. Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Dr NW, Atlanta, 30332, GA, USA
| | - Julio San Román
- Group of Biomaterials, Department of Polymeric Nanomaterials and Biomaterials, Institute of Polymer Science and Technology, CSIC, Juan de la Cierva 3, 28006, Madrid, Spain
- Networking Biomedical Research Centre in Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Av. Monforte de Lemos 3-5, 28029, Madrid, Spain
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33
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Zhang Z, Maji S, da Fonseca Antunes AB, De Rycke R, Hoogenboom R, De Geest BG. Salt-Driven Deposition of Thermoresponsive Polymer-Coated Metal Nanoparticles on Solid Substrates. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhiyue Zhang
- Department of Pharmaceutics; Ghent University; Ottergemsesteenweg 460 9000 Ghent Belgium
| | - Samarendra Maji
- Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4-bis 9000 Ghent Belgium
| | | | - Riet De Rycke
- Inflammation Research Centre, VIB, Ghent
- Department of Biomedical Molecular Biology; Ghent University; 9052 Gent Belgium
| | - Richard Hoogenboom
- Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4-bis 9000 Ghent Belgium
| | - Bruno G. De Geest
- Department of Pharmaceutics; Ghent University; Ottergemsesteenweg 460 9000 Ghent Belgium
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34
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Zhang Z, Maji S, da Fonseca Antunes AB, De Rycke R, Hoogenboom R, De Geest BG. Salt-Driven Deposition of Thermoresponsive Polymer-Coated Metal Nanoparticles on Solid Substrates. Angew Chem Int Ed Engl 2016; 55:7086-90. [DOI: 10.1002/anie.201601037] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 03/10/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Zhiyue Zhang
- Department of Pharmaceutics; Ghent University; Ottergemsesteenweg 460 9000 Ghent Belgium
| | - Samarendra Maji
- Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4-bis 9000 Ghent Belgium
| | | | - Riet De Rycke
- Inflammation Research Centre, VIB, Ghent
- Department of Biomedical Molecular Biology; Ghent University; 9052 Gent Belgium
| | - Richard Hoogenboom
- Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4-bis 9000 Ghent Belgium
| | - Bruno G. De Geest
- Department of Pharmaceutics; Ghent University; Ottergemsesteenweg 460 9000 Ghent Belgium
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35
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Palao-Suay R, Aguilar MR, Parra-Ruiz FJ, Maji S, Hoogenboom R, Rohner N, Thomas SN, Román JS. α-Tocopheryl succinate-based amphiphilic block copolymers obtained by RAFT and their nanoparticles for the treatment of cancer. Polym Chem 2016; 7:838-850. [PMID: 27004068 PMCID: PMC4797642 DOI: 10.1039/c5py01811k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
α-Tocopheryl succinate (α-TOS) is a well-known mitochondrially targeted anticancer compound. However, the major factor limiting the use of α-TOS is its low solubility in physiological media. To overcome this problem, the aim of this work is the preparation of new polymeric and active α-TOS-based nanovehicle with a precise control over its macromolecular architecture. Reversible addition-fragmentation chain transfer polymerization (RAFT) is used to synthesize an α-TOS amphiphilic block copolymer with highly homogeneous molecular weight and relatively narrow dispersity. Macro-chain transfer agents (macro-CTA) based on poly(ethylene glycol) (PEG) of different molecular weights (MW, ranging from 4.6 to 20 kDa) are used to obtain block copolymers with different hydrophilic/hydrophobic ratios with PEG being the hydrophilic block and a methacrylic derivative of α-tocopheryl succinate (MTOS) being the monomer that formed the hydrophobic block. PEG-b-poly(MTOS) form spherical nanoparticles (NPs) by self-organized precipitation (SORP) or solvent exchange in aqueous media enabling to encapsulate and deliver hydrophobic molecules in their core. The resulting NPs are rapidly endocytosed by cancer cells. The biological activity of the synthesized NPs are found to depend on the MW of PEG, with NP comprised of the higher MW copolymer resulting in the lower bioactivity due to PEG shielding inhibiting cellular uptake by endocytosis. Moreover, the biological activity also depends on the MTOS content, as the biological activity increases as a function of MTOS concentration.
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Affiliation(s)
- Raquel Palao-Suay
- Group of Biomaterials, Department of Polymeric Nanomaterials and Biomaterials, Institute of Polymer Science and Technology, CSIC, Juan de la Cierva, 3, 28006 Madrid, Spain
- Networking Biomedical Research Centre in Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Spain
| | - María Rosa Aguilar
- Group of Biomaterials, Department of Polymeric Nanomaterials and Biomaterials, Institute of Polymer Science and Technology, CSIC, Juan de la Cierva, 3, 28006 Madrid, Spain
- Networking Biomedical Research Centre in Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Spain
| | - Francisco J. Parra-Ruiz
- Group of Biomaterials, Department of Polymeric Nanomaterials and Biomaterials, Institute of Polymer Science and Technology, CSIC, Juan de la Cierva, 3, 28006 Madrid, Spain
| | - Samarendra Maji
- Supramolecular Chemistry Group. Department of Organic and Macromolecular Chemistry. Ghent University. Krijgslaan 281-S4, 9000 Ghent, Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group. Department of Organic and Macromolecular Chemistry. Ghent University. Krijgslaan 281-S4, 9000 Ghent, Belgium
| | - N.A. Rohner
- George W. Woodruff School of Mechanical Engineering and Parker H. Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Dr NW, Atlanta, 30332 Georgia, USA
| | - Susan N. Thomas
- George W. Woodruff School of Mechanical Engineering and Parker H. Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Dr NW, Atlanta, 30332 Georgia, USA
| | - Julio San Román
- Group of Biomaterials, Department of Polymeric Nanomaterials and Biomaterials, Institute of Polymer Science and Technology, CSIC, Juan de la Cierva, 3, 28006 Madrid, Spain
- Networking Biomedical Research Centre in Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Spain
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36
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Maji S, Cesur B, Zhang Z, De Geest BG, Hoogenboom R. Poly(N-isopropylacrylamide) coated gold nanoparticles as colourimetric temperature and salt sensors. Polym Chem 2016. [DOI: 10.1039/c5py01959a] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [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]
Abstract
Thermoresponsive PNIPAM coated AuNPs having dual stabilisation by the polymer chains and the charges, has been utilised for the development of temperature and salt sensors.
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Affiliation(s)
- Samarendra Maji
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Belgin Cesur
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Zhiyue Zhang
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | | | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
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37
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Custers JPA, van Nispen SFGM, Can A, de La Rosa VR, Maji S, Schubert US, Keurentjes JTF, Hoogenboom R. Reversible Calcium(II)‐Ion Binding through an Apparent p
K
a
Shift of Thermosensitive Block‐Copolymer Micelles. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505351] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Johannes P. A. Custers
- Process Development Group, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven (The Netherlands)
| | - Sjoerd F. G. M. van Nispen
- Process Development Group, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven (The Netherlands)
| | - Aydin Can
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich‐Schiller‐University Jena, Humboldtstrasse 10, 07743 Jena (Germany)
- Jena Center for Soft Matter (JCSM), Friedrich‐Schiller‐University Jena, Philosophenweg 7, 07743 Jena (Germany)
| | - Victor R. de La Rosa
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Ghent (Belgium) http://www.sc.ugent.be
| | - Samarendra Maji
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Ghent (Belgium) http://www.sc.ugent.be
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich‐Schiller‐University Jena, Humboldtstrasse 10, 07743 Jena (Germany)
- Jena Center for Soft Matter (JCSM), Friedrich‐Schiller‐University Jena, Philosophenweg 7, 07743 Jena (Germany)
| | - Jos T. F. Keurentjes
- Process Development Group, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven (The Netherlands)
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Ghent (Belgium) http://www.sc.ugent.be
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38
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Custers JPA, van Nispen SFGM, Can A, de La Rosa VR, Maji S, Schubert US, Keurentjes JTF, Hoogenboom R. Reversible Calcium(II)-Ion Binding through an Apparent pKaShift of Thermosensitive Block-Copolymer Micelles. Angew Chem Int Ed Engl 2015; 54:14085-9. [DOI: 10.1002/anie.201505351] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Indexed: 01/08/2023]
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39
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Kumar S, Maji S, Joseph M, Sankaran K. Ligand sensitized luminescence of uranyl by benzoic acid in acetonitrile medium: a new luminescent uranyl benzoate specie. Spectrochim Acta A Mol Biomol Spectrosc 2015; 138:509-516. [PMID: 25528510 DOI: 10.1016/j.saa.2014.11.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 11/18/2014] [Accepted: 11/20/2014] [Indexed: 06/04/2023]
Abstract
Benzoic acid (BA) is shown to sensitize and enhance the luminescence of uranyl ion in acetonitrile medium. Luminescence spectra and especially UV-Vis spectroscopy studies reveal the formation of tri benzoate complex of uranyl i.e. [UO2(C6H5COO)3](-) which is highly luminescent. In particular, three sharp bands at 431, 443, 461nm of absorption spectra provides evidence for tri benzoate specie of uranyl in acetonitrile medium. The luminescence lifetime of uranyl in this complex is 68μs which is much more compared to the lifetime of uncomplexed uranyl (20μs) in acetonitrile medium. In contrary to aqueous medium where uranyl benzoate forms 1:1 and 1:2 species, spectroscopic data reveal formation of 1:3 complex in acetonitrile medium. Addition of water to acetonitrile results in decrease of luminescence intensity of this specie and the luminescence features implode at 20% (v/v) of water content. For the first time, to the best of our knowledge, the existence of [UO2(C6H5COO)3](-) specie in acetonitrile is reported. Mechanism of luminescence enhancement is discussed.
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Affiliation(s)
- Satendra Kumar
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
| | - S Maji
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
| | - M Joseph
- Fuel Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
| | - K Sankaran
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
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40
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Panja S, Maji S, Maiti T, Chattopadhyay S. A branched polymer as a pH responsive nanocarrier: Synthesis, characterization and targeted delivery. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.01.075] [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: 02/06/2023]
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41
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Maji S, Kumar S, Sankaran K. Fluorescence and co-fluorescence of Tb(3+) and Eu(3+) in acetonitrile using 2,6-pyridine dicarboxylic acid as ligand. Spectrochim Acta A Mol Biomol Spectrosc 2015; 135:405-409. [PMID: 25105262 DOI: 10.1016/j.saa.2014.07.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 07/04/2014] [Accepted: 07/15/2014] [Indexed: 06/03/2023]
Abstract
Fluorescence from Tb(3+) and Eu(3+) complexed with 2,6-pyridine dicarboxylic acid (PDA) has been studied using acetonitrile (MeCN) as solvent. The enhancement in fluorescence intensity because of non-aqueous environment provided by the MeCN is less significant, where as fluorescence enhancement of more than two orders of magnitude has been observed with the addition of La(3+); a process known as co-fluorescence in MeCN. The present study demonstrates for the first time co-fluorescence of Tb(3+) and Eu(3+) with excitation through the absorption of PDA. Intermolecular energy transfer is believed to be responsible for co-fluorescence enhancement and it becomes possible as the quenching due to water at the secondary coordination spheres of Tb(3+) and Eu(3+) is reduced when MeCN is used as solvent.
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Affiliation(s)
- S Maji
- Material Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
| | - Satendra Kumar
- Material Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
| | - K Sankaran
- Material Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
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42
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Coulembier O, Moins S, Maji S, Zhang Z, De Geest BG, Dubois P, Hoogenboom R. Linear polyethylenimine as (multi) functional initiator for organocatalytic l-lactide polymerization. J Mater Chem B 2015; 3:612-619. [DOI: 10.1039/c4tb01387e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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]
Abstract
The preparation of polyethylenimine (PEI)–polylactide (PLA) copolymer structures is promising as these materials may find use in gene and/or drug delivery applications.
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Affiliation(s)
- Olivier Coulembier
- Laboratory of Polymeric and Composite Materials
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- University of Mons
- B-7000 Mons
- Belgium
| | - Sébastien Moins
- Laboratory of Polymeric and Composite Materials
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- University of Mons
- B-7000 Mons
- Belgium
| | - Samarendra Maji
- Supramolecular Chemistry Group
- Department of Organic Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
| | - Zhiyue Zhang
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | | | - Philippe Dubois
- Laboratory of Polymeric and Composite Materials
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- University of Mons
- B-7000 Mons
- Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic Chemistry
- Ghent University
- B-9000 Ghent
- Belgium
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43
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Vanparijs N, Maji S, Louage B, Voorhaar L, Laplace D, Zhang Q, Shi Y, Hennink WE, Hoogenboom R, De Geest BG. Correction: Polymer–protein conjugation via a ‘grafting to’ approach – a comparative study of the performance of protein-reactive RAFT chain transfer agents. Polym Chem 2015. [DOI: 10.1039/c5py90115d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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]
Abstract
Correction for ‘Polymer–protein conjugation via a ‘grafting to’ approach – a comparative study of the performance of protein-reactive RAFT chain transfer agents’ by N. Vanparijs et al., Polym. Chem., 2015, DOI: 10.1039/c4py01224k.
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Affiliation(s)
- N. Vanparijs
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | - S. Maji
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- 9000 Ghent
- Belgium
| | - B. Louage
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | - L. Voorhaar
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- 9000 Ghent
- Belgium
| | - D. Laplace
- Laboratory for Organic Synthesis
- Department of Organic Chemistry
- 9000 Ghent
- Belgium
| | - Q. Zhang
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- 9000 Ghent
- Belgium
| | - Y. Shi
- Department of Pharmaceutics
- Utrecht Institute for Pharmaceutical Sciences
- Utrecht University
- David de Wiedgebouw
- 3584 Utrecht
| | - W. E. Hennink
- Department of Pharmaceutics
- Utrecht Institute for Pharmaceutical Sciences
- Utrecht University
- David de Wiedgebouw
- 3584 Utrecht
| | - R. Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- 9000 Ghent
- Belgium
| | - B. G. De Geest
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
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44
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Vanparijs N, Maji S, Louage B, Voorhaar L, Laplace D, Zhang Q, Shi Y, Hennink WE, Hoogenboom R, De Geest BG. Polymer-protein conjugation via a ‘grafting to’ approach – a comparative study of the performance of protein-reactive RAFT chain transfer agents. Polym Chem 2015. [DOI: 10.1039/c4py01224k] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The performances of various protein-reactive RAFT CTAs to afford polymer-protein conjugation via a grafting-to approach were compared.
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Affiliation(s)
- N. Vanparijs
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | - S. Maji
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- 9000 Ghent
- Belgium
| | - B. Louage
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | - L. Voorhaar
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- 9000 Ghent
- Belgium
| | - D. Laplace
- Laboratory for Organic Synthesis
- Department of Organic Chemistry
- 9000 Ghent
- Belgium
| | - Q. Zhang
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- 9000 Ghent
- Belgium
| | - Y. Shi
- Department of Pharmaceutics
- Utrecht Institute for Pharmaceutical Sciences
- Utrecht University
- 3584 Utrecht
- The Netherlands
| | - W. E. Hennink
- Department of Pharmaceutics
- Utrecht Institute for Pharmaceutical Sciences
- Utrecht University
- 3584 Utrecht
- The Netherlands
| | - R. Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- 9000 Ghent
- Belgium
| | - B. G. De Geest
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
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45
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Maji S, Zhang Z, Voorhaar L, Pieters S, Stubbe B, Van Vlierberghe S, Dubruel P, De Geest BG, Hoogenboom R. Thermoresponsive polymer coated gold nanoparticles: from MADIX/RAFT copolymerization of N-vinylpyrrolidone and N-vinylcaprolactam to salt and temperature induced nanoparticle aggregation. RSC Adv 2015. [DOI: 10.1039/c5ra06559c] [Citation(s) in RCA: 22] [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: 12/24/2022] Open
Abstract
In the present contribution, we report the synthesis of thermoresponsive homo and statistical copolymers of N-vinylcaprolactam and N-vinylpyrrolidone and the corresponding responsive gold nanoparticles.
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Affiliation(s)
- Samarendra Maji
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Zhiyue Zhang
- Faculty of Pharmaceutical Sciences
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | - Lenny Voorhaar
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Sophie Pieters
- Polymer Chemistry and Biomaterials Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Birgit Stubbe
- Polymer Chemistry and Biomaterials Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Sandra Van Vlierberghe
- Polymer Chemistry and Biomaterials Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Peter Dubruel
- Polymer Chemistry and Biomaterials Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Bruno G. De Geest
- Faculty of Pharmaceutical Sciences
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
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46
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Glassner M, Maji S, de la Rosa VR, Vanparijs N, Ryskulova K, De Geest BG, Hoogenboom R. Solvent-free mechanochemical synthesis of a bicyclononyne tosylate: a fast route towards bioorthogonal clickable poly(2-oxazoline)s. Polym Chem 2015. [DOI: 10.1039/c5py01280e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The mechanochemical synthesis of a bicyclononyne tosylate (BCN-OTs) and its subsequent use for the CROP of 2-ethyl-2-oxazoline yielding bioorthogonal clickable poly(2-ethyl-2-oxazoline) is presented.
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Affiliation(s)
- Mathias Glassner
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Samarendra Maji
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Victor R. de la Rosa
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Nane Vanparijs
- Department of Pharmaceutics
- Ghent University
- B-9000 Ghent
- Belgium
| | - Kanykei Ryskulova
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | | | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
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47
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Vanparijs N, De Coen R, Laplace D, Louage B, Maji S, Lybaert L, Hoogenboom R, De Geest BG. Transiently responsive protein–polymer conjugates via a ‘grafting-from’ RAFT approach for intracellular co-delivery of proteins and immune-modulators. Chem Commun (Camb) 2015; 51:13972-5. [DOI: 10.1039/c5cc04809e] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
‘Grafting-from’ RAFT polymerization is used to synthesize protein–polymer conjugates that change from the soluble to the aggregated state in response to temperature, but become fully soluble by acid triggered hydrolysis.
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Affiliation(s)
- N. Vanparijs
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | - R. De Coen
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | - D. Laplace
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - B. Louage
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | - S. Maji
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - L. Lybaert
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
| | - R. Hoogenboom
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - B. G. De Geest
- Department of Pharmaceutics
- Ghent University
- 9000 Ghent
- Belgium
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48
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Maji S, Kumar S, Sankaran K. Estimation of Eu(3+) in bulk uranium by ligand sensitized fluorescence in dimethyl sulphoxide. Spectrochim Acta A Mol Biomol Spectrosc 2014; 133:259-264. [PMID: 24950382 DOI: 10.1016/j.saa.2014.05.057] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 03/05/2014] [Accepted: 05/06/2014] [Indexed: 06/03/2023]
Abstract
Ligand sensitized fluorescence of europium ion using thenoyltrifluoroacetone (TTA) as a sensitizing ligand and dimethyl sulphoxide (DMSO) as a solvent is studied for the first time. TTA ligand enhances the fluorescence of Eu(3+) by a factor of 40000 in DMSO. Linearity is obtained for a concentration range of 0.076-7.6ng/mL of Eu(3+) with a detection limit of 7.6pg/mL. The quenching of Eu(3+)-TTA fluorescence by uranium matrix was studied in different solvents and found to be less in DMSO. Consequently, estimation of Eu(3+) in a large excess of uranium becomes a possibility without the need to separate uranium from the solution, which has been demonstrated in this paper. Satisfactory results are obtained when Eu(3+) is present at a concentration of 0.6μg/g in uranium.
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Affiliation(s)
- S Maji
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
| | - Satendra Kumar
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
| | - K Sankaran
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
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49
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Zhang Q, Tosi F, Üǧdüler S, Maji S, Hoogenboom R. Tuning the LCST and UCST Thermoresponsive Behavior of Poly(N,N-dimethylaminoethyl methacrylate) by Electrostatic Interactions with Trivalent Metal Hexacyano Anions and Copolymerization. Macromol Rapid Commun 2014; 36:633-9. [DOI: 10.1002/marc.201400550] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 10/23/2014] [Indexed: 12/23/2022]
Affiliation(s)
- Qilu Zhang
- Supramolecular Chemistry Group; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 B-9000 Gent Belgium
| | - Filippo Tosi
- Supramolecular Chemistry Group; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 B-9000 Gent Belgium
| | - Sibel Üǧdüler
- Supramolecular Chemistry Group; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 B-9000 Gent Belgium
| | - Samarendra Maji
- Supramolecular Chemistry Group; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 B-9000 Gent Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 B-9000 Gent Belgium
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50
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Sundaramurthy A, Vergaelen M, Maji S, Auzély-Velty R, Zhang Z, De Geest BG, Hoogenboom R. Hydrogen bonded multilayer films based on poly(2-oxazoline)s and tannic acid. Adv Healthc Mater 2014; 3:2040-7. [PMID: 25274164 DOI: 10.1002/adhm.201400377] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [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: 07/02/2014] [Revised: 08/26/2014] [Indexed: 12/12/2022]
Abstract
In recent years, the layer-by-layer (LbL) assembly based on hydrogen bonding interactions is gaining popularity for the preparation of thin film coatings, especially for biomedical purposes, based on the use of neutral, non-toxic building blocks. The use of tannic acid (TA) as hydrogen bonding donor is especially interesting as it results in LbL films that are stable under physiological conditions. In this work, investigations on the LbL thin film preparation of TA with poly(2-oxazoline)s with varying hydrophilicity, namely poly(2-methyl-2-oxazoline) (PMeOx), poly(2-ethyl-2-oxazoline) (PEtOx) and poly(2-n-propyl-2-oxazoline) (PnPropOx), are reported. The LbL assembly process is investigated by quartz crystal microbalance and UV-vis spectroscopy revealing linear growth of the film thickness. Furthermore, isothermal titration calorimetry demonstrates the LbL assembly of TA, and PMeOx is found to be mostly enthalpy driven while the LbL assembly of TA with PEtOx and PnPropOx is mostly entropy driven. Finally, scanning electron microscopy and ellipsometry demonstrate the formation of smooth thin films for LbL assembly of TA with all three polymers. Such poly(2-oxazoline) coatings have high potential for use as anti-biofouling coatings.
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Affiliation(s)
- Anandhakumar Sundaramurthy
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 B-9000 Ghent Belgium
- SRM Research Institute; SRM University; Kattankulathur, Chennai 603 203 Tamil Nadu India
| | - Maarten Vergaelen
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 B-9000 Ghent Belgium
| | - Samarendra Maji
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 B-9000 Ghent Belgium
| | | | - Zhiyue Zhang
- Department of Pharmaceutics; Ghent University; Harelbekestraat 72 9000 Ghent Belgium
| | - Bruno G. De Geest
- Department of Pharmaceutics; Ghent University; Harelbekestraat 72 9000 Ghent Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 S4 B-9000 Ghent Belgium
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