Pub Date : 2017-09-30DOI: 10.37622/ijac/13.3.2017.663-672
N. Dave, Tejas Joshi
Surface active agents constitute an interesting class of substances with unique structural features. This review provides an introduction to the nature and physical properties of surfactants, its trade name, types, characteristics and their basic applications. Fundamental of critical micelle concentration (CMC), cloud point, kraft point are mentioned. Surfactant size and shape are vital characteristics and provide unique information during industrial formulation. Surfactant properties play significant roles in industrial and consumer products including detergents, paints, paper products, pharmaceuticals and cosmetics. The last few years show an increased interest in work involving the preparation and study of surfactants based on natural products.
{"title":"A Concise Review on Surfactants and Its Significance","authors":"N. Dave, Tejas Joshi","doi":"10.37622/ijac/13.3.2017.663-672","DOIUrl":"https://doi.org/10.37622/ijac/13.3.2017.663-672","url":null,"abstract":"Surface active agents constitute an interesting class of substances with unique structural features. This review provides an introduction to the nature and physical properties of surfactants, its trade name, types, characteristics and their basic applications. Fundamental of critical micelle concentration (CMC), cloud point, kraft point are mentioned. Surfactant size and shape are vital characteristics and provide unique information during industrial formulation. Surfactant properties play significant roles in industrial and consumer products including detergents, paints, paper products, pharmaceuticals and cosmetics. The last few years show an increased interest in work involving the preparation and study of surfactants based on natural products.","PeriodicalId":13860,"journal":{"name":"International Journal of Applied Chemistry","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74170299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-06-30DOI: 10.37622/ijac/13.2.2017.353-368
Sanjay Kumar
This paper reports the solvent effects on the electronic absorption and fluorescence emission spectra of 6-OH-4-CH3, 7-OH-4-CH3 and 7-OH-4-CF3 Coumarin derivatives having -OH, -CH3 and-CF3 substituent at different positions in various solvents (Polar and Non-Polar). The first excited singlet state dipole moment and ground state dipole moment were calculated using Bakhshiev, Kawski-Chamma-Viallet and Reichardt-Dimroth equations and were compared for all the Coumarin studied. In all cases the dipole moments were found to be higher in the excited singlet state then in the ground state indicating a substantial redistribution of πelectron density in the excited state. The angle between the excited singlet state and ground state dipole moment is also calculated. The red shift of the absorption and fluorescence emission bands, observed for all the Coumarin studied upon increasing the solvent polarity indicating that the electronic transitions were π→π nature.
{"title":"Studies of Substituent and Solvent effect on Spectroscopic Properties of 6-OH-4-CH3, 7-OH-4-CH3 and 7-OH-4-CF3 Coumarin","authors":"Sanjay Kumar","doi":"10.37622/ijac/13.2.2017.353-368","DOIUrl":"https://doi.org/10.37622/ijac/13.2.2017.353-368","url":null,"abstract":"This paper reports the solvent effects on the electronic absorption and fluorescence emission spectra of 6-OH-4-CH3, 7-OH-4-CH3 and 7-OH-4-CF3 Coumarin derivatives having -OH, -CH3 and-CF3 substituent at different positions in various solvents (Polar and Non-Polar). The first excited singlet state dipole moment and ground state dipole moment were calculated using Bakhshiev, Kawski-Chamma-Viallet and Reichardt-Dimroth equations and were compared for all the Coumarin studied. In all cases the dipole moments were found to be higher in the excited singlet state then in the ground state indicating a substantial redistribution of πelectron density in the excited state. The angle between the excited singlet state and ground state dipole moment is also calculated. The red shift of the absorption and fluorescence emission bands, observed for all the Coumarin studied upon increasing the solvent polarity indicating that the electronic transitions were π→π nature.","PeriodicalId":13860,"journal":{"name":"International Journal of Applied Chemistry","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88384606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-08-30DOI: 10.37622/ijac/5.2.2009.63-71
M. Sharma, R. Saxena, S. Sharma, Suneeti Singh
{"title":"Green approach of in - situ Chemical Immobilization of Lead in metal - Contaminated Soils of NCT of Delhi Using Coal Fly Ash","authors":"M. Sharma, R. Saxena, S. Sharma, Suneeti Singh","doi":"10.37622/ijac/5.2.2009.63-71","DOIUrl":"https://doi.org/10.37622/ijac/5.2.2009.63-71","url":null,"abstract":"","PeriodicalId":13860,"journal":{"name":"International Journal of Applied Chemistry","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2009-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81703890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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