Pub Date : 2023-10-18DOI: 10.56042/ijc.v62i10.3779
Monoamine oxidase (MAO) enzymes oversee the concentration of neurotransmitters and intracellular amines in the brain and peripheral tissues by catalysing their oxidative deamination and represents a crucial target in drug designing for the management of neurological and psychiatric disorders. Present study is an effort to present an economical fast high throughput screening easy method to identify indole analogues as potent MAO inhibitors, using different computational techniques. CoMSIA field-based 3D-QSAR models were developed by applying the partial least squares regression algorithm that exhibited satisfactory predictive and descriptive capability with statistical parameters R² (0.9557) and Q² (0.8529). Generated model (s) helped in explaining the key descriptors firmly related with MAO inhibitory activity and were used to generate library of 1853 indole derivatives. Library was evaluated and resulted in the dentification of 30indole derivatives with high docking scores (-9.978 to -7.136) in comparison to the antidepressant standard drug Isocarboxazid (-7.125). Further, these compounds were scrutinized through drug-likeliness profiles and Desmond's molecular dynamics simulations studies for 100 ns. Further in vitro and in vivo studies on these molecules might provide us with new drug candidate for the treatment of depression with high therapeutic index.
{"title":"3D-QSAR, Molecular Docking and ADME Studies on Indole Analogues Reveal Antidepressant Activity Through Monoamine Oxidase-A Inhibition","authors":"","doi":"10.56042/ijc.v62i10.3779","DOIUrl":"https://doi.org/10.56042/ijc.v62i10.3779","url":null,"abstract":"Monoamine oxidase (MAO) enzymes oversee the concentration of neurotransmitters and intracellular amines in the brain and peripheral tissues by catalysing their oxidative deamination and represents a crucial target in drug designing for the management of neurological and psychiatric disorders. Present study is an effort to present an economical fast high throughput screening easy method to identify indole analogues as potent MAO inhibitors, using different computational techniques. CoMSIA field-based 3D-QSAR models were developed by applying the partial least squares regression algorithm that exhibited satisfactory predictive and descriptive capability with statistical parameters R² (0.9557) and Q² (0.8529). Generated model (s) helped in explaining the key descriptors firmly related with MAO inhibitory activity and were used to generate library of 1853 indole derivatives. Library was evaluated and resulted in the dentification of 30indole derivatives with high docking scores (-9.978 to -7.136) in comparison to the antidepressant standard drug Isocarboxazid (-7.125). Further, these compounds were scrutinized through drug-likeliness profiles and Desmond's molecular dynamics simulations studies for 100 ns. Further in vitro and in vivo studies on these molecules might provide us with new drug candidate for the treatment of depression with high therapeutic index.","PeriodicalId":29765,"journal":{"name":"INDIAN JOURNAL OF CHEMISTRY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135885217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, a new cyclometalated iridium(III) complex [Ir(ppy)2(mbiim)]Cl (Ir3) (in which mbiim = 1-Methyl-2,2'-biimidazole, ppy = 2-phenylpyridine) has been successfully synthesized and characterized by ESI-MS, UV-Vis spectroscopy and 1H NMR. The fluorescence properties of Ir3 have been studied in different pH value conditions. The fluorescence properties show that the fluorescence intensity of Ir3 decreases with the increase of pH in the experiment range, which is due to the protonation/deprotonation of active hydrogen of the imidazole ring on the imidazole ligand. Moreover, the photodynamic antitumor activities in vitro of three Ir(III) complexes have been investigated by MTT assay against four cell lines (HeLa, A549, A549R and LO2). These complexes exhibit low dark toxicity and high phototoxicity in three tumor cells. To our excitement, Ir3 has achieved satisfactory photodynamic therapy effects on cisplatin-resistant tumor cell lines A549R, while its toxicity towards normal cells is relatively lower. The results indicate that Ir3 is a relatively ideal photosensitizer, which may be developed into a new potential photodynamic therapy reagent against tumor.
{"title":"Synthesis, characterization and in vitro antitumor activities of a biimidazole-chelated Ir(III) complex","authors":"","doi":"10.56042/ijc.v62i9.5359","DOIUrl":"https://doi.org/10.56042/ijc.v62i9.5359","url":null,"abstract":"In this paper, a new cyclometalated iridium(III) complex [Ir(ppy)2(mbiim)]Cl (Ir3) (in which mbiim = 1-Methyl-2,2'-biimidazole, ppy = 2-phenylpyridine) has been successfully synthesized and characterized by ESI-MS, UV-Vis spectroscopy and 1H NMR. The fluorescence properties of Ir3 have been studied in different pH value conditions. The fluorescence properties show that the fluorescence intensity of Ir3 decreases with the increase of pH in the experiment range, which is due to the protonation/deprotonation of active hydrogen of the imidazole ring on the imidazole ligand. Moreover, the photodynamic antitumor activities in vitro of three Ir(III) complexes have been investigated by MTT assay against four cell lines (HeLa, A549, A549R and LO2). These complexes exhibit low dark toxicity and high phototoxicity in three tumor cells. To our excitement, Ir3 has achieved satisfactory photodynamic therapy effects on cisplatin-resistant tumor cell lines A549R, while its toxicity towards normal cells is relatively lower. The results indicate that Ir3 is a relatively ideal photosensitizer, which may be developed into a new potential photodynamic therapy reagent against tumor.","PeriodicalId":29765,"journal":{"name":"INDIAN JOURNAL OF CHEMISTRY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The thermo-physical parameters like density (ρ), ultrasonic velocity (u) and viscosity (η) have been experimentally measured for the ternary liquid mixture of para-anisaldehyde (4-methoxy benzaldehyde) in n-Hexane solution with dimethylamine at various temperatures such as 303 K, 308 K and 313 K and at fixed frequency of 2 MHz. The thermodynamic and acoustical parameters such as adiabatic compressibility (β), internal pressure (πi), cohesive energy (CE), free volume (Vf), free length (Lf), acoustic impedance (z), viscous relaxation time, Lennard Jones potential (LJP), and K value have been calculated from the experimental data. The various excess properties including excess acoustic impedance (ZE), excess free length ( , excess adiabatic compressibility (βE), excess free volume (VfE), excess ultrasonic velocity (UE) and excess internal pressure (πiE) have also been computed from the calculated values. The values of , ZE, and for each mixture have been fitted to the Redlich –Kister polynomial equation. The variation of these parameters with respect to different concentration at different temperatures for the ternary system of para-anisaldehyde + dimethylamine + n-hexane has been studied in accordance with their strength of molecular interaction under the influence of ultrasonic wave of frequency 2 MHz.
{"title":"Ultrasonic study for the molecular interactions of the ternary liquid mixture of p-anisaldehyde (4-methoxy benzaldehyde) with dimethylamine (N-methylmethanamine) and n-hexane at various temperatures","authors":"","doi":"10.56042/ijc.v62i9.5361","DOIUrl":"https://doi.org/10.56042/ijc.v62i9.5361","url":null,"abstract":"The thermo-physical parameters like density (ρ), ultrasonic velocity (u) and viscosity (η) have been experimentally measured for the ternary liquid mixture of para-anisaldehyde (4-methoxy benzaldehyde) in n-Hexane solution with dimethylamine at various temperatures such as 303 K, 308 K and 313 K and at fixed frequency of 2 MHz. The thermodynamic and acoustical parameters such as adiabatic compressibility (β), internal pressure (πi), cohesive energy (CE), free volume (Vf), free length (Lf), acoustic impedance (z), viscous relaxation time, Lennard Jones potential (LJP), and K value have been calculated from the experimental data. The various excess properties including excess acoustic impedance (ZE), excess free length ( , excess adiabatic compressibility (βE), excess free volume (VfE), excess ultrasonic velocity (UE) and excess internal pressure (πiE) have also been computed from the calculated values. The values of , ZE, and for each mixture have been fitted to the Redlich –Kister polynomial equation. The variation of these parameters with respect to different concentration at different temperatures for the ternary system of para-anisaldehyde + dimethylamine + n-hexane has been studied in accordance with their strength of molecular interaction under the influence of ultrasonic wave of frequency 2 MHz.","PeriodicalId":29765,"journal":{"name":"INDIAN JOURNAL OF CHEMISTRY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A rapid, conventional reflux and efficient procedure is used to synthesize a series of ternary metal complexes derived from Schiff base of 2-aminobenzimidazole with 2-chloroacetophenone and secondary ligands (8-hydroxy quinoline or l-histidine). Our present work focuses on the potential of the synthesized Schiff base, its metal complexes and the study of their antimicrobial activity. All these compounds are characterized by elemental analysis, melting point, magnetic moment measurement, molar conductance measurement and various spectral techniques such as FTIR, 1H NMR, and mass spectra. Among these synthesized complexes, Ni(II) complex having 8-hydroxyquinoline as a secondary ligand exhibits excellent antifungal activity against Aspergillus niger compared to standard Ketoconazole whereas other metal complexes show good to moderate activity against gram-positive bacteria i.e. Staphylococcus aureus and gram-negative bacteria i.e. Escherichia coli compared to standard Ciprofloxacin.
{"title":"Synthesis of ternary metal complexes of bivalent metal ions with benzimidazole derivative and their antimicrobial studies","authors":"","doi":"10.56042/ijc.v62i9.5360","DOIUrl":"https://doi.org/10.56042/ijc.v62i9.5360","url":null,"abstract":"A rapid, conventional reflux and efficient procedure is used to synthesize a series of ternary metal complexes derived from Schiff base of 2-aminobenzimidazole with 2-chloroacetophenone and secondary ligands (8-hydroxy quinoline or l-histidine). Our present work focuses on the potential of the synthesized Schiff base, its metal complexes and the study of their antimicrobial activity. All these compounds are characterized by elemental analysis, melting point, magnetic moment measurement, molar conductance measurement and various spectral techniques such as FTIR, 1H NMR, and mass spectra. Among these synthesized complexes, Ni(II) complex having 8-hydroxyquinoline as a secondary ligand exhibits excellent antifungal activity against Aspergillus niger compared to standard Ketoconazole whereas other metal complexes show good to moderate activity against gram-positive bacteria i.e. Staphylococcus aureus and gram-negative bacteria i.e. Escherichia coli compared to standard Ciprofloxacin.","PeriodicalId":29765,"journal":{"name":"INDIAN JOURNAL OF CHEMISTRY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nanocomposite ferric oxide, γ-Fe2O3 has been synthesized using different structure directing agents by sol-gel method. The synthesized γ-Fe2O3 has been characterized by XRD and FT-IR. Using this nano-ferric oxide catalyst, different naturally occurring acetate esters have been synthesized and analyzed using spectroscopic methods. The catalytic activity of the catalyst has been investigated for the green, solvent free, one pot synthesis of naturally occurring acetate esters. It is observed that the γ-Fe2O3, synthesized by using urea as structure directing agent shows the highest percent conversion of acetic acid as compared to those synthesized via other methods.
{"title":"Nanocomposite γ-ferric oxide (γ-Fe2O3) mediated, green, solvent free, one pot synthesis of naturally occurring acetate esters","authors":"","doi":"10.56042/ijc.v62i9.5358","DOIUrl":"https://doi.org/10.56042/ijc.v62i9.5358","url":null,"abstract":"Nanocomposite ferric oxide, γ-Fe2O3 has been synthesized using different structure directing agents by sol-gel method. The synthesized γ-Fe2O3 has been characterized by XRD and FT-IR. Using this nano-ferric oxide catalyst, different naturally occurring acetate esters have been synthesized and analyzed using spectroscopic methods. The catalytic activity of the catalyst has been investigated for the green, solvent free, one pot synthesis of naturally occurring acetate esters. It is observed that the γ-Fe2O3, synthesized by using urea as structure directing agent shows the highest percent conversion of acetic acid as compared to those synthesized via other methods.","PeriodicalId":29765,"journal":{"name":"INDIAN JOURNAL OF CHEMISTRY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
There is a wide variety of biological activity that may be shown by complexes of mixed ligands with transition metal ions. Schiff bases, which are compounds that include an azomethine (C=N) group and amino acids, are very versatile molecules that may be used in the construction of ternary complexes. All three novel metal complex derivatives from the 4-(5-((2-hydroxybenzylidene)amino)-1,3,4-thiadiazol-2-yl)benzonitrile in alcoholic medium have been effectively synthesised by combining HL with the metal ions Mg(II), Zn(II) and Sn(II). Elemental analysis, molecular weight, magnetic moment and spectroscopic methods have been used to characterise the prepared complexes. Biological evaluation of the ligand and its metal complexes has demonstrated weak to significant antibacterial activity, relative to the standard antibiotic (Kanamycin). The prepared metal bound complexes are bactericidal to a greater extent than the corresponding unbounded Schiff base ligand.
{"title":"Schiff base metal complex synthesis, characterization, and antimicrobial application","authors":"","doi":"10.56042/ijc.v62i9.5380","DOIUrl":"https://doi.org/10.56042/ijc.v62i9.5380","url":null,"abstract":"There is a wide variety of biological activity that may be shown by complexes of mixed ligands with transition metal ions. Schiff bases, which are compounds that include an azomethine (C=N) group and amino acids, are very versatile molecules that may be used in the construction of ternary complexes. All three novel metal complex derivatives from the 4-(5-((2-hydroxybenzylidene)amino)-1,3,4-thiadiazol-2-yl)benzonitrile in alcoholic medium have been effectively synthesised by combining HL with the metal ions Mg(II), Zn(II) and Sn(II). Elemental analysis, molecular weight, magnetic moment and spectroscopic methods have been used to characterise the prepared complexes. Biological evaluation of the ligand and its metal complexes has demonstrated weak to significant antibacterial activity, relative to the standard antibiotic (Kanamycin). The prepared metal bound complexes are bactericidal to a greater extent than the corresponding unbounded Schiff base ligand.","PeriodicalId":29765,"journal":{"name":"INDIAN JOURNAL OF CHEMISTRY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Novel and efficient fluorescent probes having N2, N6-bis(5-Mercapto-1,3,4-thiadiazol-2-yl)pyridine-2,6-dicarboxamide (TPDC) are synthesized by the condensation reaction between pyridine-2,6-dicarboxylic acid and amino derivatives of thiadiazoles. The novel fluorescent probe TPDC exhibits a highly sensitive and selective response to Fe3+ and Hg2+ ions in HEPES buffer solution showing the detection limit to be 0.49 micromole and 0.0066 micromole, respectively. The binding stoichiometry of TPDC with Fe3+ and Hg2+ have been estimated by Jobs plot and found to be 1:1. These have been confirmed by MS spectra. The stability constant of the fluorescent probe with Fe3+ and Hg2+ has been determined by the Benesi–Hildebrand equation. The binding constant for Fe3+ and Hg2+ ions are 2.54 × 101 M−1 and 0.18 × 102 M−1, respectively. The crystallinity of compounds have also been calculated by XRD spectra and found to be 66.37%.
{"title":"Pyridine-2,6-dicarboxamide-based fluorescent sensor for detection of Fe3+ and Hg2+","authors":"","doi":"10.56042/ijc.v62i9.5375","DOIUrl":"https://doi.org/10.56042/ijc.v62i9.5375","url":null,"abstract":"Novel and efficient fluorescent probes having N2, N6-bis(5-Mercapto-1,3,4-thiadiazol-2-yl)pyridine-2,6-dicarboxamide (TPDC) are synthesized by the condensation reaction between pyridine-2,6-dicarboxylic acid and amino derivatives of thiadiazoles. The novel fluorescent probe TPDC exhibits a highly sensitive and selective response to Fe3+ and Hg2+ ions in HEPES buffer solution showing the detection limit to be 0.49 micromole and 0.0066 micromole, respectively. The binding stoichiometry of TPDC with Fe3+ and Hg2+ have been estimated by Jobs plot and found to be 1:1. These have been confirmed by MS spectra. The stability constant of the fluorescent probe with Fe3+ and Hg2+ has been determined by the Benesi–Hildebrand equation. The binding constant for Fe3+ and Hg2+ ions are 2.54 × 101 M−1 and 0.18 × 102 M−1, respectively. The crystallinity of compounds have also been calculated by XRD spectra and found to be 66.37%.","PeriodicalId":29765,"journal":{"name":"INDIAN JOURNAL OF CHEMISTRY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Novel antioxidant mono- and diethanolamide, eight additives were prepared from castor oil, coconut oil, thumba oil and sal fat. These were evaluated for antioxidant efficacy taking epoxy karanja oil as base oil at 0.5-5% concentration. Antioxidant tests were performed on Rotating Pressure Vessel Oxidation Test RPVOT and Differential Scanning Calorimetry DSC. Among the prepared mono and diethanolamides, only diethanolamide-based additives exhibited potential anti-oxidant behavior. Coconut diethanolamides containing saturated medium chain fatty acids exhibited excellent stabilities, followed by diethanolamides of sal rich in saturated long chain fatty acids. The castor based diethanolamides rich in mono unsaturated hydroxy fatty acid showed slightly lower stabilities, while thumba with polyunsaturation exhibited poor oxidation stabilities. Both the methods have shown that the fatty diethanolamides exhibited extraordinary stabilities compared to commercial antioxidant, butylated hydroxy toluene BHT at 1-5% concentration. The study indicated that the presence of saturation and medium chain fatty acids in the diethanolamide-based additives improved the oxidation stability of the base oils.
{"title":"Vegetable oil-based ethanolamides as potential anti-oxidant additives for lubricant formulations","authors":"","doi":"10.56042/ijc.v62i9.2322","DOIUrl":"https://doi.org/10.56042/ijc.v62i9.2322","url":null,"abstract":"Novel antioxidant mono- and diethanolamide, eight additives were prepared from castor oil, coconut oil, thumba oil and sal fat. These were evaluated for antioxidant efficacy taking epoxy karanja oil as base oil at 0.5-5% concentration. Antioxidant tests were performed on Rotating Pressure Vessel Oxidation Test RPVOT and Differential Scanning Calorimetry DSC. Among the prepared mono and diethanolamides, only diethanolamide-based additives exhibited potential anti-oxidant behavior. Coconut diethanolamides containing saturated medium chain fatty acids exhibited excellent stabilities, followed by diethanolamides of sal rich in saturated long chain fatty acids. The castor based diethanolamides rich in mono unsaturated hydroxy fatty acid showed slightly lower stabilities, while thumba with polyunsaturation exhibited poor oxidation stabilities. Both the methods have shown that the fatty diethanolamides exhibited extraordinary stabilities compared to commercial antioxidant, butylated hydroxy toluene BHT at 1-5% concentration. The study indicated that the presence of saturation and medium chain fatty acids in the diethanolamide-based additives improved the oxidation stability of the base oils.","PeriodicalId":29765,"journal":{"name":"INDIAN JOURNAL OF CHEMISTRY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A simple synthesis of a novel fungicide Mandipropamid has been achieved in 6 steps, with an overall yield 43%. Synthesis started from commercially available starting materials, 4-chloroacetophenone and vanillin. The key steps involved in the synthesis are Cannizzaro and Henry reactions, amide bond formation and O-propargylation.
{"title":"Synthesis of Crop Protection Agent Mandipropamid","authors":"","doi":"10.56042/ijc.v62i9.3120","DOIUrl":"https://doi.org/10.56042/ijc.v62i9.3120","url":null,"abstract":"A simple synthesis of a novel fungicide Mandipropamid has been achieved in 6 steps, with an overall yield 43%. Synthesis started from commercially available starting materials, 4-chloroacetophenone and vanillin. The key steps involved in the synthesis are Cannizzaro and Henry reactions, amide bond formation and O-propargylation.","PeriodicalId":29765,"journal":{"name":"INDIAN JOURNAL OF CHEMISTRY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Various biopolymers have been reported to play very important role in different fields including pharmaceutical sciences, water treatment as well as nanosciences. The properties of these biopolymers are widely affected by their molecular weight, structural and functional moieties on them. In order to improve the efficiency towards desired application, they are subjected to chemical and physical processes. One of them is radiation induced degradation or crosslinking. Radiation has been reported as one of the methods for modification of polysaccharides. In this study, chitosan and sodium alginate have been degraded using gamma radiation from 60Co source with dose rate of 4.295 kGy/h, with doses upto 100 kGy. The molecular weights were determined by viscosity method. Similarly, both of them were were subjected to various characterization methods such as TGA-DTA, XRD, FTIR, SEM-EDX, UV-Vis and DDA (degree of deacetylation). Radiation induced degradation was confirmed through reduction in molecular weight with respect to gamma dose. Basic advantage of radiation degradation of biopolymers include ability to promote changes in a reproducible manner, quantitatively and without introduction of chemical agents. The highlight of gamma irradiation of biopolymer is that there is no chemical waste generation.
{"title":"Gamma degradation studies of chitosan and sodium alginate biopolymers","authors":"","doi":"10.56042/ijc.v62i9.270","DOIUrl":"https://doi.org/10.56042/ijc.v62i9.270","url":null,"abstract":"Various biopolymers have been reported to play very important role in different fields including pharmaceutical sciences, water treatment as well as nanosciences. The properties of these biopolymers are widely affected by their molecular weight, structural and functional moieties on them. In order to improve the efficiency towards desired application, they are subjected to chemical and physical processes. One of them is radiation induced degradation or crosslinking. Radiation has been reported as one of the methods for modification of polysaccharides. In this study, chitosan and sodium alginate have been degraded using gamma radiation from 60Co source with dose rate of 4.295 kGy/h, with doses upto 100 kGy. The molecular weights were determined by viscosity method. Similarly, both of them were were subjected to various characterization methods such as TGA-DTA, XRD, FTIR, SEM-EDX, UV-Vis and DDA (degree of deacetylation). Radiation induced degradation was confirmed through reduction in molecular weight with respect to gamma dose. Basic advantage of radiation degradation of biopolymers include ability to promote changes in a reproducible manner, quantitatively and without introduction of chemical agents. The highlight of gamma irradiation of biopolymer is that there is no chemical waste generation.","PeriodicalId":29765,"journal":{"name":"INDIAN JOURNAL OF CHEMISTRY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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