1
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Surfactant-induced fluorescence enhancement of a quinoline-coumarin derivative in aqueous solutions and dropcast films. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Dasgupta S, Chowdhury A, Sahoo DK, Datta A. Interplay of conformational relaxation and hydrogen bond dynamics in the excited states of fluorescent Schiff base anions. Phys Chem Chem Phys 2022; 25:304-313. [PMID: 36477682 DOI: 10.1039/d2cp05007b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Time resolved fluorescence spectroscopic investigation of four Schiff base anions has established that their excited state dynamics is governed by several solvent properties: polarity, viscosity and hydrogen bond donating ability. With viscous protic solvents like glycerol, fluorescence lifetimes of anions have been found to be markedly longer than those in ethanol, implying that conformational relaxation of molecules plays a key role in their nonradiative relaxation. Surprisingly, the lifetimes in less viscous aprotic solvents, like acetonitrile, are found to be even longer. The only plausible rationalization of this observation is in the light of hydrogen bond-assisted nonradiative phenomena that are operative in protic solvents. This contention draws support from a time evolution of the emission in the red end of the spectrum in low to moderately hydrogen bond donating protic solvents, with regard to an absence of such a rise time in aprotic solvents and strongly hydrogen bond donating solvents, viz., 2,2,2-trifluoroethanol. Rudimentary quantum chemical calculations provide a preliminary idea about the nature of excited state hydrogen bond redistribution involved in the process.
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Affiliation(s)
- Souradip Dasgupta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
| | - Arkaprava Chowdhury
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
| | - Dipak Kumar Sahoo
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
| | - Anindya Datta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.
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3
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Das P, Mandal P, Shit D, Pramanik S. Unraveling the effect of surfactant chain length on the binding interaction of curcumin with cationic and non‐ionic micelles. J SURFACTANTS DETERG 2022. [DOI: 10.1002/jsde.12592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Priyabrata Das
- Department of Chemistry University of Calcutta Kolkata India
| | - Pabitra Mandal
- Department of Chemistry University of Calcutta Kolkata India
| | - Debatri Shit
- Department of Chemistry University of Calcutta Kolkata India
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4
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Das S, Singha PK, Singh AK, Datta A. The Role of Hydrogen Bonding in the Preferential Solvation of 5-Aminoquinoline in Binary Solvent Mixtures. J Phys Chem B 2021; 125:12763-12773. [PMID: 34709811 DOI: 10.1021/acs.jpcb.1c06208] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
5-Aminoquinoline (5AQ) has been used as a fluorescent probe of preferential solvation (PS) in binary solvent mixtures in which the nonpolar component is diethyl ether and the polar component is protic (methanol) or aprotic (acetonitrile). Hence, the roles of solvent polarity and solute-solvent hydrogen bonding have been delineated. Positive deviations of spectral shifts from a linear dependence on the concentration of the polar component, signifying PS, are markedly more pronounced in case of the protic solvent. Solvation dynamics on a nanosecond time scale mark the formation of the solvation shell around the fluorescent probe. Time-resolved area-normalized emission spectra indicate the occurrence of the continuous solvation of the excited state when the polar component is acetonitrile. In contrast, two distinct states were observed when the polar component was methanol, the second state being the hydrogen bonded one. Translational diffusion is the rate-determining step for formation of the solvation shell. The time constant associated with it has been estimated from rise times observed in fluorescence transients monitored at the red end of the fluorescence spectra and also from the time evolution of the spectral width of time-resolved emission spectra.
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Affiliation(s)
- Sharmistha Das
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Prajit Kumar Singha
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Avinash Kumar Singh
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Anindya Datta
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
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5
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Aggrawal R, Kumari S, Gangopadhyay S, Saha SK. Role of Different States of Solubilized Water on Solvation Dynamics and Rotational Relaxation of Coumarin 490 in Reverse Micelles of Gemini Surfactants, Water/12- s-12.2Br - ( s = 5, 6, 8)/ n-Propanol/Cyclohexane. ACS OMEGA 2020; 5:6738-6753. [PMID: 32258909 PMCID: PMC7114611 DOI: 10.1021/acsomega.0c00035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 03/04/2020] [Indexed: 06/07/2023]
Abstract
The present study demonstrates how the different states of solubilized water viz. quaternary ammonium headgroup-bound, bulklike, counterion-bound, and free water in reverse micelles of a series of cationic gemini surfactants, water/12-s-12 (s = 5, 6, 8).2Br-/n-propanol/cyclohexane, control the solvation dynamics and rotational relaxation of Coumarin 490 (C-490) and microenvironment of the reverse micelles. The relative number of solubilized water molecules of a given state per surfactant molecule decides major and minor components. A rapid increase in the number of bulklike water molecules per surfactant molecule as compared to the slow increase in the number of each of headgroup- and counterion-bound water molecules per surfactant molecule with increasing water content (W o) in a given reverse micellar system is responsible for the increase in the rate of solvation and rotational relaxation of C-490. The increase in the number of counterion-bound water molecules per surfactant molecule and the concomitant decrease in the number of bulklike water molecules per surfactant molecule with increasing spacer chain length of gemini surfactants at a given W o are ascribed to the slower rates of both solvation and rotational relaxation. Relative abundances of different states of water have a role on the microenvironment of the reverse micelles as well. Thus, a comprehensive effect of different states of water on dynamics in complex biomimicking systems has been presented here.
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Affiliation(s)
- Rishika Aggrawal
- Department
of Chemistry, Birla Institute of Technology
& Science (BITS), Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Sunita Kumari
- Department
of Chemistry, Birla Institute of Technology
& Science (BITS), Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Subhashis Gangopadhyay
- Department
of Physics, Birla Institute of Technology
& Science (BITS), Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
| | - Subit Kumar Saha
- Department
of Chemistry, Birla Institute of Technology
& Science (BITS), Pilani, Pilani Campus, Pilani, Rajasthan 333031, India
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6
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Macias-Jamaica R, Castrejón-González E, González-Alatorre G, Alvarado J, Díaz-Ovalle C. Molecular models for Sodium Dodecyl Sulphate in aqueous solution to reduce the micelle time formation in molecular simulation. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Solvation dynamics in SDS micelle revisited with femtosecond time resolution to reveal the probe and concentration dependence. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.07.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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8
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Vinarov Z, Dobreva P, Tcholakova S. Effect of surfactant molecular structure on Progesterone solubilization. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2017.09.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Slow solvation dynamics in supramolecular systems based on bile salts: Role of structural rigidity of bile salt aggregates. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.05.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Kumari S, Sonu, Sundar G, Saha SK. Effect of organic and a Hofmeister series of inorganic counterions on the solvation dynamics and rotational relaxation in aqueous micelles of hexadecyltrimethylammonium surfactants. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.05.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Singh P, Choudhury S, Singha S, Jun Y, Chakraborty S, Sengupta J, Das R, Ahn KH, Pal SK. A sensitive fluorescent probe for the polar solvation dynamics at protein–surfactant interfaces. Phys Chem Chem Phys 2017; 19:12237-12245. [DOI: 10.1039/c6cp08804j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Relaxation dynamics at the surface of biologically important macromolecules is important taking into account their functionality in molecular recognition.
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Affiliation(s)
- Priya Singh
- Department of Chemical
- Biological & Macromolecular Sciences
- S. N. Bose National Centre for Basic Sciences
- Kolkata 700 106
- India
| | - Susobhan Choudhury
- Department of Chemical
- Biological & Macromolecular Sciences
- S. N. Bose National Centre for Basic Sciences
- Kolkata 700 106
- India
| | - Subhankar Singha
- Department of Chemistry
- Pohang University of Science and Technology (POSTECH)
- Pohang
- Republic of Korea
| | - Yongwoong Jun
- Department of Chemistry
- Pohang University of Science and Technology (POSTECH)
- Pohang
- Republic of Korea
| | | | - Jhimli Sengupta
- Department of Chemistry
- West Bengal State University
- Kolkata 700126
- India
| | - Ranjan Das
- Department of Chemistry
- West Bengal State University
- Kolkata 700126
- India
| | - Kyo-Han Ahn
- Department of Chemistry
- Pohang University of Science and Technology (POSTECH)
- Pohang
- Republic of Korea
| | - Samir Kumar Pal
- Department of Chemical
- Biological & Macromolecular Sciences
- S. N. Bose National Centre for Basic Sciences
- Kolkata 700 106
- India
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12
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Mukherjee K, Barman A, Biswas R. Impact of the aggregation behaviour of sodium cholate and sodium deoxycholate on aqueous solution structure and dynamics: A combined time resolved fluorescence and dielectric relaxation spectroscopic study. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.07.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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13
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Banik D, Roy A, Kundu N, Sarkar N. Picosecond Solvation and Rotational Dynamics: An Attempt to Reinvestigate the Mystery of Alcohol–Water Binary Mixtures. J Phys Chem B 2015; 119:9905-19. [PMID: 26121323 DOI: 10.1021/acs.jpcb.5b04931] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Debasis Banik
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Arpita Roy
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Niloy Kundu
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
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14
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Sonu, Kumari S, Saha SK. Effect of Polymethylene Spacer of Cationic Gemini Surfactants on Solvation Dynamics and Rotational Relaxation of Coumarin 153 in Aqueous Micelles. J Phys Chem B 2015; 119:9751-63. [PMID: 26107156 DOI: 10.1021/acs.jpcb.5b03081] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The present work demonstrates the solvation dynamics and rotational relaxation of Coumarin 153 (C-153) in the micelles of a series of cationic gemini surfactants, 12-s-12, 2Br(-) containing a hydrophobic polymethylene spacer with s = 3, 4, 6, 8, 12. Steady-state and time-correlated single-photon counting (TCSPC) fluorescence spectroscopic techniques have been used to carry out this study. Steady-state and TCSPC fluorescence data suggest that C-153 molecules are located at the Stern layer of micelles. While probe molecules feel more or less the same micropolarity in the micellar phase, the microviscosity of micelles decreases with spacer chain length. Solvation dynamics at the Stern layer is bimodal in nature with fast solvation as a major component. Counter ions and water molecules bonded with the polar headgroups of surfactant molecules are responsible for the slow component. Average solvation time increases with spacer chain length because of the increased degree of counter ion dissociation. Some water molecules are involved in the solvation of counter ions themselves, resulting in the decrease in "free" water molecules to be available for the solvation of C-153. The hydrophobic spacer chain also has an effect on increasing the solvation time with increasing chain length. The average rotational relaxation time for C-153 decreases with spacer chain length with a rapid decrease at s > 4. The anisotropy decay of C-153 in micelles is biexponential in nature. The slow rotational relaxation is due to the lateral diffusion of C-153 in micelles. Lateral diffusion is much faster than the rotational motion of a micelle as a whole. The rotational motion of the micelle as a whole becomes faster with the decreasing size of micelles.
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15
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Desai D, Wong B, Huang Y, Ye Q, Guo H, Huang M, Timmins P. Wetting effects versus ion pairs diffusivity: interactions of anionic surfactants with highly soluble cationic drugs and its impact on tablet dissolution. J Pharm Sci 2015; 104:2255-65. [PMID: 26017286 DOI: 10.1002/jps.24478] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 03/25/2015] [Accepted: 04/13/2015] [Indexed: 11/07/2022]
Abstract
A study was conducted to develop a mechanistic understanding of dissolution of a highly soluble cationic drug, metformin hydrochloride, under the influence of anionic surfactants, sodium alkyl sulfates. The surfactants did not influence the saturated solubility of the drug, but reduced the surface tension of the dissolution media as the alkyl chain length increased. Their influence on tablet wetting based on the contact angles did not show any trend. The dissolution of 850 mg metformin hydrochloride tablets in 0.1 N HCl and pH 4.5 acetate buffer with 0.01% (w/v) sodium n-octyl sulfate (C8), sodium n-decyl sulfate (C10), or sodium n-tetradecyl sulfate (C14) was similar to the control, but was enhanced by sodium lauryl sulfate (C12). At 0.1% (w/v) concentration, the dissolution was not enhanced by C12 because the reduction in surface tension was counterbalanced by an increase in hydrophobic ion pairs that showed slower diffusivity by nuclear magnetic resonance. At 0.1% (w/v), metformin also formed an insoluble salt (1:2 molar ratios) with C10 (pH 1.2), C12, and C14 (pH 1.2 and 4.5) but not with C8. Three competing factors influenced the drug dissolution by surfactants: reduction in surface tension of the dissolution media, ion pairs with low diffusivity, and formation of an insoluble salt.
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Affiliation(s)
- Divyakant Desai
- Drug Product Science and Technology, Bristol-Myers Squibb Company, New Brunswick, New Jersey, 08903-0191
| | - Benjamin Wong
- Drug Product Science and Technology, Bristol-Myers Squibb Company, New Brunswick, New Jersey, 08903-0191
| | - Yande Huang
- Analytical and Bioanalytical Development, Bristol-Myers Squibb Company, New Brunswick, New Jersey, 08903-0191
| | - Qingmei Ye
- Analytical and Bioanalytical Development, Bristol-Myers Squibb Company, New Brunswick, New Jersey, 08903-0191
| | - Hang Guo
- Drug Product Science and Technology, Bristol-Myers Squibb Company, New Brunswick, New Jersey, 08903-0191.,CDER, FDA, Silver Spring, Maryland
| | - Ming Huang
- Analytical and Bioanalytical Development, Bristol-Myers Squibb Company, New Brunswick, New Jersey, 08903-0191
| | - Peter Timmins
- Drug Product Science and Technology, Bristol-Myers Squibb, Moreton, Merseyside, CH46 1QW, United Kingdom
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16
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Meng B, Ashbaugh HS. Effect of hydrostatic pressure on gas solubilization in micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:3318-3325. [PMID: 25730396 DOI: 10.1021/la503646z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Molecular dynamics simulations of anionic sodium decylsulfate and nonionic pentaethylene glycol monodecyl ether micelles in water have been performed to examine the impact of hydrostatic pressure on argon solubilization as a function of pressure. The potential-of-mean force between the micelles and argon demonstrates that nonpolar gases are attracted to the interiors of both micelles. The affinity of argon for micelle interiors, however, decreases with increasing pressure as a result of the comparatively higher molar volume of argon inside assemblies. We evaluate solubility enhancement coefficients, which describe the drop in the solute chemical potential as a function of the micellized surfactant concentration, to quantify the impact of micellization on gas solubilization. While argon is similarly attracted to the hydrophobic cores of both micelles, the gas is more effectively sequestered within nonionic micelles compared with anionic micelles as a result of salting out by charged head groups and accompanying counterions. The solubility enhancement coefficients of both micelles decrease with increasing pressure, reflecting the changing forces observed in the potentials-of-mean force. An analytical liquid drop model is proposed to describe the pressure dependence of argon solubilization within micelles that captures the simulation solubility enhancement coefficients after fitting an effective micelle radius for each surfactant.
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Affiliation(s)
- Bin Meng
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, United States
| | - Henry S Ashbaugh
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, United States
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17
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Banik D, Kundu N, Kuchlyan J, Roy A, Banerjee C, Ghosh S, Sarkar N. Picosecond solvation dynamics—A potential viewer of DMSO—Water binary mixtures. J Chem Phys 2015; 142:054505. [DOI: 10.1063/1.4906541] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Debasis Banik
- Department of Chemistry, Indian Institute of Technology, Kharagpur, WB 721302, India
| | - Niloy Kundu
- Department of Chemistry, Indian Institute of Technology, Kharagpur, WB 721302, India
| | - Jagannath Kuchlyan
- Department of Chemistry, Indian Institute of Technology, Kharagpur, WB 721302, India
| | - Arpita Roy
- Department of Chemistry, Indian Institute of Technology, Kharagpur, WB 721302, India
| | - Chiranjib Banerjee
- Department of Chemistry, Indian Institute of Technology, Kharagpur, WB 721302, India
| | - Surajit Ghosh
- Department of Chemistry, Indian Institute of Technology, Kharagpur, WB 721302, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology, Kharagpur, WB 721302, India
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18
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Maity B, Chatterjee A, Seth D. Photophysics of lumichrome in anionic and cationic micellar media. RSC Adv 2015. [DOI: 10.1039/c4ra14998j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The photophysics of lumichrome in the presence of cationic and anionic micellar environments was reported in this article.
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Affiliation(s)
- Banibrata Maity
- Department of Chemistry
- Indian Institute of Technology Patna
- Patna 800013
- India
| | - Aninda Chatterjee
- Department of Chemistry
- Indian Institute of Technology Patna
- Patna 800013
- India
| | - Debabrata Seth
- Department of Chemistry
- Indian Institute of Technology Patna
- Patna 800013
- India
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19
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Ghosh S, Kuchlyan J, Roychowdhury S, Banik D, Kundu N, Roy A, Sarkar N. Unique Influence of Cholesterol on Modifying the Aggregation Behavior of Surfactant Assemblies: Investigation of Photophysical and Dynamical Properties of 2,2′-Bipyridine-3,3′-diol, BP(OH)2 in Surfactant Micelles, and Surfactant/Cholesterol Forming Vesicles. J Phys Chem B 2014; 118:9329-40. [PMID: 25036947 DOI: 10.1021/jp503938b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Surajit Ghosh
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Jagannath Kuchlyan
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Subhajit Roychowdhury
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Debasis Banik
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Niloy Kundu
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Arpita Roy
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Nilmoni Sarkar
- Department
of Chemistry, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
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20
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Chatterjee A, Maity B, Seth D. Photophysics of 7-(diethylamino)coumarin-3-carboxylic acid in cationic micelles: effect of chain length and head group of the surfactants and urea. RSC Adv 2014. [DOI: 10.1039/c4ra02532f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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21
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Kedia N, Roy SG, De P, Bagchi S. Synthesis of a polymer bearing several coumarin dyes along the side chain and study of its fluorescence in pure and binary solvent mixtures as well as aqueous surfactant solutions. J Phys Chem B 2014; 118:4683-92. [PMID: 24712342 DOI: 10.1021/jp4127557] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A copolymer bearing several pendent dyes (coumarin derivatives) along the side chain has been synthesized, and its fluorescence parameters have been monitored in pure solvents and also as a function of composition of binary solvent mixtures. Fluorescence parameters (the maximum energy of fluorescence, quantum yield, and rate constant for the decay of the excited state) of the free fluorophore show significant dependence on the nature of the immediate environment around it. The value of a parameter measured in neat solvent for the fluorophore covalently bound to the polymer is different from that of the free fluorophore, indicating that the polymer chain influences the spectroscopic properties of the dye. Whereas the energy of maximum fluorescence of the free fluorophore shows a nonlinear correlation with the solvent composition of solvent mixtures, an almost linear correlation has been observed for the polymer. A significant variation of photophysical parameters of the dye dissolved in binary solvent mixtures, which is different from that of the free fluorophore, has been observed. Thus, the free fluorophore and the fluorophore bound to the polymer sense different environments in binary solvent mixtures. A dramatic variation of fluorescence intensity of the fluorophore bound to the polymer has been observed when sodium dodecyl sulfate (SDS) is added to an aqueous solution of the polymer. The results have been explained in terms of the existence of different species (polymer, polymer-SDS aggregates, micelles) in equilibrium in solution.
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Affiliation(s)
- Niraja Kedia
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata , Mohanpur Campus, BCKV Main P.O., Nadia 741252, West Bengal, India
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22
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Zhao Y, Li X. Detecting the micellization of anionic surfactants by a colorimetric and fluorescent probe based on electrostatic attraction. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3209-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Tiwari AK, Sonu, Saha SK. Effect of Hydroxyl Group Substituted Spacer Group of Cationic Gemini Surfactants on Solvation Dynamics and Rotational Relaxation of Coumarin-480 in Aqueous Micelles. J Phys Chem B 2014; 118:3582-92. [DOI: 10.1021/jp4069703] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Amit K. Tiwari
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan, India
| | - Sonu
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan, India
| | - Subit K. Saha
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, Rajasthan, India
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24
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Sonu, Tiwari AK, Kumari S, Saha SK. Study on intramolecular charge transfer processes, solvation dynamics and rotational relaxation of coumarin 490 in reverse micelles of cationic gemini surfactant. RSC Adv 2014. [DOI: 10.1039/c4ra02708f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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25
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Ray D, Pramanik A, Guchhait N. Differential modulation of lactim–lactam tautomerism process of an isoindole fused imidazole system in three different micellar assemblies of varying surface charge: a spectroscopic approach to various photophysical properties. RSC Adv 2014. [DOI: 10.1039/c3ra47322h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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26
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Meng B, Ashbaugh HS. Pressure reentrant assembly: direct simulation of volumes of micellization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:14743-14747. [PMID: 23930981 DOI: 10.1021/la402798f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Surfactants exhibit maxima in their critical micelle concentrations upon application of hydrostatic pressure, which is attributable to changes in their volumes of micellization from positive to negative values with increasing pressure. We present a direct molecular simulation analysis of the volumes of micellization of an anionic, cationic, and nonionic surfactant in aqueous solution at pressures up to 2500 bar. Excellent agreement with experiment is observed. A Kirkwood-Buff theory analysis based on proximal solvent distributions permits the breakdown of the volumes of micellization into constituent surfactant headgroup and tailgroup contributions. Although the micellization volume crossover is analogous to the transfer of an alkane from water to its pure liquid, significant differences are observed, including lower compressibilities of micelle volumes compared to that of the alkane liquid, negative partial compressibilites for anionic sulfated surfactant monomers, and large nonionic ethoxy headgroup contributions to the micellization volume.
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Affiliation(s)
- Bin Meng
- Department of Chemical and Biomolecular Engineering, Tulane University , New Orleans, Louisiana 70118, United States
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Bairu S, Ramakrishna G. Two-Photon Absorption Properties of Chromophores in Micelles: Electrostatic Interactions. J Phys Chem B 2013; 117:10484-91. [DOI: 10.1021/jp405416d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Semere Bairu
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, United States
| | - Guda Ramakrishna
- Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, United States
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Ghosh S, Banerjee C, Mandal S, Rao VG, Sarkar N. Effect of Alkyl Chain of Room Temperature Ionic Liquid (RTILs) on the Phase Behavior of [C2mim][CnSO4]/TX-100/Cyclohexane Microemulsions: Solvent and Rotational Relaxation Study. J Phys Chem B 2013; 117:5886-97. [DOI: 10.1021/jp400013r] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Surajit Ghosh
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Chiranjib Banerjee
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Sarthak Mandal
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Vishal Govind Rao
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
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Franklin JM, Surampudi LN, Ashbaugh HS, Pozzo DC. Numerical validation of IFT in the analysis of protein-surfactant complexes with SAXS and SANS. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:12593-600. [PMID: 22861495 DOI: 10.1021/la3028379] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The use of the indirect Fourier transform methods for evaluating structural parameters directly in real space with small-angle scattering measurements is validated for the analysis of protein-surfactant complexes. An efficient Monte Carlo approach rapidly generates in silico structures based on a realistic pearl-necklace model for denatured proteins decorated with surfactant micelles. Corresponding scattering profiles are calculated and averaged over a large number of possible configurations for each structure. IFT algorithms are then used to calculate the corresponding pair-distance distribution function, and structural information is extracted directly without model fitting. The extracted parameters are compared and correlated with the known structure of the simulated complexes to assess the quality of the information that can be reliably obtained from these systems. The average extension, nearest-neighbor micelle distance, and average number of associated micelles are all accurately extracted through IFT calculations. Improved and simple approaches to reliably extract the average extension of the complex and the total number of associated micelles are presented.
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Affiliation(s)
- J Matthew Franklin
- Department of Chemical Engineering, Michigan State University, East Lansing, Michigan 48825, United States
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Saha R, Rakshit S, Mitra RK, Pal SK. Microstructure, morphology, and ultrafast dynamics of a novel edible microemulsion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:8309-8317. [PMID: 22571238 DOI: 10.1021/la3012124] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An edible microemulsion (ME) composed of Tween 80/butyl lactate/isopropyl myristate (IPM)/water has been formulated. Pseudoternary phase diagram of the system contains a large single isotropic region. The phase behavior of the system is also studied at low pH (2.6) and in 0.9% NaCl solution. Conductivity, viscosity, ultrasonic velocity, and compressibility studies find consistent results in the structural transition (from water-in-oil (w/o) to bicontinuous, and from bicontinuous to oil-in-water (o/w)) behavior of the ME. Dynamic light scattering studies reveal the size of the MEs. The absorption and steady state emission spectra of 4-(dicyanomethylene)-2-methyl-6-(p-dimethylamino-styryl)-4H-pyran (DCM) successfully probe the polarity of the ME at its solvation shell and shows the efficacy of hosting model drug molecules. The rotational anisotropy of the dye has been studied to ascertain the geometrical restriction of the probe molecule. Picosecond-resolved fluorescence spectroscopy applies well to study the relaxation dynamics of water in the solvation shell of the MEs. The study finds strong correlation in the relaxation dynamics of water with the structure of host assembly and offers an edible ME system which could act as a potential drug delivery system and nontoxic nanotemplate for other applications.
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Affiliation(s)
- Ranajay Saha
- Department of Chemical, Biological & Macromolecular Sciences, S.N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700098, India
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Donovalová J, Cigáň M, Stankovičová H, Gašpar J, Danko M, Gáplovský A, Hrdlovič P. Spectral properties of substituted coumarins in solution and polymer matrices. Molecules 2012; 17:3259-76. [PMID: 22418928 PMCID: PMC6268095 DOI: 10.3390/molecules17033259] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Revised: 03/07/2012] [Accepted: 03/08/2012] [Indexed: 11/26/2022] Open
Abstract
The absorption and fluorescence spectra of substituted coumarins (2-oxo-2H-chromenes) were investigated in solvents and in polymer matrices. The substitutions involved were: (1) by groups with varying electron donating ability such as CH3, OCH3 and N(CH3)2, mainly, but not exclusively, in positions 7 and (2), by either CHO or 4-PhNHCONHN=CH- in position 3. While the spectra of non-substituted coumarin-3-carbaldehyde has absorptions at approximately 305 and 350 nm, substitution at position 7 leads to remarkable changes in the shape of the absorption spectrum and shifts the absorption to a longer wavelength. Similarly, the replacement of the formyl group with a semicarbazide group substantially influences the shape of the absorption spectrum, and coumarins which have only N(CH3)2 in position 7 experience small changes. These changes are associated with the increasing intramolecular charge transfer (ICT) character and increasing conjugation length of the chromophoric system, respectively, in the studied molecules. The fluorescence is almost negligible for derivatives which have H in this position. With increasing electron donating ability, and the possibility of a positive mesomeric (+M) effect of the substituent in position 7 of the coumarin moiety, the fluorescence increases, and this increase is most intense when N(CH3)2 substitutes in this position, for both 3-substituted derivatives. Spectral measurements of the studied coumarins in polymer matrices revealed that the absorption and fluorescence maxima lay within the maxima for solvents, and that coumarins yield more intense fluorescence in polymer matrices than when they are in solution. The quantum yield of derivatives which have a dimethylamino group in position 7 in polymer matrices approaches 1, and the fluorescence lifetime is within the range of 0.5–4 ns. The high quantum yield of 7-dimethylamino derivatives qualifies them as laser dyes which have kF higher than knr in the given medium. This is caused by stiffening of the coumarin structure in polar polymer matrices, such as PMMA and PVC, due to higher micro-viscosity than in solution and intermolecular dipole-dipole interaction between chromophore (dopant) and matrix.
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Affiliation(s)
- Jana Donovalová
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
- Author to whom correspondence should be addressed; ; Tel.: +421-2-6029-6306; Fax: +421-2-6029-6337
| | - Marek Cigáň
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
| | - Henrieta Stankovičová
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
| | - Jan Gašpar
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
| | - Martin Danko
- Polymer Institute, Slovak Academy of Sciences, 845 41 Bratislava, Dúbravská cesta 9, Slovak Republic;
| | - Anton Gáplovský
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
| | - Pavol Hrdlovič
- Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovak Republic; (M.C.); (H.S.); (J.G.); (A.G.); (P.H.)
- Polymer Institute, Slovak Academy of Sciences, 845 41 Bratislava, Dúbravská cesta 9, Slovak Republic;
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Soboleva OA, Pronchenko KS, Chernysheva MG, Badun GA. The Distribution of mixtures of dodecyl ether of poly(23)ethylene glycol with sodium dodecyl sulfate and dodecyltrimethylammonium bromide in the water/octane system. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2012. [DOI: 10.1134/s0036024412030284] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Shirota H, Ishida T. Microscopic Aspects in Dicationic Ionic Liquids through the Low-Frequency Spectra by Femtosecond Raman-Induced Kerr Effect Spectroscopy. J Phys Chem B 2011; 115:10860-70. [DOI: 10.1021/jp206266e] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hideaki Shirota
- Department of Nanomaterial Science, Graduate School of Advanced Integration Science & Department of Chemistry, Faculty of Science, Chiba University, 1-33 Yayoi, Inage-ku, Chiba 263-8522, Japan
| | - Tateki Ishida
- Department of Theoretical and Computational Molecular Science, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
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35
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Zhang L, Yin Q, Su J, Wu Q. Local Polarity and Microviscosity of the Interior of Dendritic Polyethylene Amphiphiles. Macromolecules 2011. [DOI: 10.1021/ma2013089] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Ling Zhang
- DSAPM Lab, School of Chemistry and Chemical Engineering, and PCFM Lab, OFCM Institute, Sun Yat-Sen University, Guangzhou 510275, China
| | - Qihe Yin
- DSAPM Lab, School of Chemistry and Chemical Engineering, and PCFM Lab, OFCM Institute, Sun Yat-Sen University, Guangzhou 510275, China
| | - Jing Su
- DSAPM Lab, School of Chemistry and Chemical Engineering, and PCFM Lab, OFCM Institute, Sun Yat-Sen University, Guangzhou 510275, China
| | - Qing Wu
- DSAPM Lab, School of Chemistry and Chemical Engineering, and PCFM Lab, OFCM Institute, Sun Yat-Sen University, Guangzhou 510275, China
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36
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Sarma N, Borah JM, Mahiuddin S, Gazi HAR, Guchhait B, Biswas R. Influence of Chain Length of Alcohols on Stokes’ Shift Dynamics in Catanionic Vesicles. J Phys Chem B 2011; 115:9040-9. [DOI: 10.1021/jp201402h] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Namrata Sarma
- Materials Science Division, North-East Institute of Science and Technology, CSIR, Jorhat 785006, Assam, India
| | - Jayanta M. Borah
- Materials Science Division, North-East Institute of Science and Technology, CSIR, Jorhat 785006, Assam, India
| | - Sekh Mahiuddin
- Materials Science Division, North-East Institute of Science and Technology, CSIR, Jorhat 785006, Assam, India
| | - Harun Al Rasid Gazi
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake City, Kolkata 700 098, India
| | - Biswajit Guchhait
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake City, Kolkata 700 098, India
| | - Ranjit Biswas
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake City, Kolkata 700 098, India
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37
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Kumbhakar M, Dey S, Singh PK, Nath S, Satpati AK, Gangully R, Aswal VK, Pal H. Tuning of Intermolecular Electron Transfer Reaction by Modulating the Microenvironment Inside Copolymer−Surfactant Supramolecular Assemblies. J Phys Chem B 2011; 115:1638-51. [DOI: 10.1021/jp109217v] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
| | - Swayandipta Dey
- Chemistry Department, Pondicherry University, Kalapet, Pondicherry 605014, India
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Fluorescence Probing in Structurally Anisotropic Materials. ADVANCED FLUORESCENCE REPORTERS IN CHEMISTRY AND BIOLOGY III 2011. [DOI: 10.1007/978-3-642-18035-4_4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Hrdlovic P, Donovalova J, Stankovicova H, Gaplovsky A. Influence of polarity of solvents on the spectral properties of bichromophoric coumarins. Molecules 2010; 15:8915-32. [PMID: 21139531 PMCID: PMC6259138 DOI: 10.3390/molecules15128915] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Revised: 12/01/2010] [Accepted: 12/06/2010] [Indexed: 11/29/2022] Open
Abstract
Absorption and fluorescence spectra of bichromophoric coumarins were investigated in different solvents and in polymer matrices. These bichromophoric coumarins were composed of a coumarin dimethylamino-substituted at position 7 or unsubstituted coumarin and phthalimide or a 1,8-naphthylimide linked with an iminomethyl bridge to the position 3 or 8 of the coumarin ring. Absorption spectra of 7-dimethylamino derivatives in position 3 of coumarin were quite similar, exhibiting broad bands around 430-440 nm like the parent compound 7-dimethylaminocoumarin-3-carbaldehyde. For coumarin derivatives substituted in position 8, the absorption maximum was shifted to shorter wavelength as for derivatives without position 7 dimethylamino substitution. The most intense fluorescence was observed for 7-(N,N-dimethylamino)-3-[(N-phtalimidoyl)iminomethyl]coumarin in polar solvent, while intense fluorescence was observed for 7-(N,N-dimethylamino)-3-[N-(1,3-dioxobenz[de]isoquinolinyl)iminomethyl]-coumarin in non polar solvent (chloroform), comparable with the fluorescence of 7-amino-4-methylcoumarin. Spectral measurements of bichromophoric coumarins in polymer matrices revealed that the maxima lies in between those for chloroform and methanol yielding more intense fluorescence then in solutions. Completely different solvent effects were observed for 7-(N,N-dimethylamino)-3-[N-(1,3-dioxobenz[de]isoquinolinyl)imino-methyl]coumarin and 7-(N,N-dimethylamino)-3-[(N-phtalimidoyl)iminomethyl]coumarin. With addition of polar methanol the intensity of fluorescence decreases, yielding a Stern-Volmer-like constant of 0.54 dm³ mol⁻¹ for 7-(N,N-dimethylamino)-3-[N-(1,3-dioxo-benz[de]isoquinolinyl)iminomethyl]coumarin and an even higher one of 1.08 dm³·mol⁻¹ for 7-dimethylaminocoumarin-3-carbaldehyde compared to the rather low one of 0.024 dm³ mol⁻¹ for 7-amino-4-methylcoumarin. Contrary to this, addition of methanol under identical conditions brings about an increase in fluorescence intensity of 7-(N,N-dimethylamino)-3-[(N-phtalimidoyl)iminomethyl]coumarin (about 60-fold). The reasons for these different solvent effects are discussed.
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Affiliation(s)
- Pavol Hrdlovic
- Polymer Institute, Slovak Academy of Sciences, 842 36 Bratislava, Dúbravska cesta 9, Slovakia; E-Mail: (P.H.)
| | - Jana Donovalova
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Mlynska dolina CH-2, SK-842 15 Bratislava, Slovakia; E-Mails: (H.S); (A.G.)
| | - Henrieta Stankovicova
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Mlynska dolina CH-2, SK-842 15 Bratislava, Slovakia; E-Mails: (H.S); (A.G.)
| | - Anton Gaplovsky
- Institute of Chemistry, Faculty of Natural Sciences, Comenius University, Mlynska dolina CH-2, SK-842 15 Bratislava, Slovakia; E-Mails: (H.S); (A.G.)
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Kumbhakar M, Singh PK, Satpati AK, Nath S, Pal H. Ultrafast Electron Transfer Dynamics in Micellar Media Using Surfactant as the Intrinsic Electron Acceptor. J Phys Chem B 2010; 114:10057-65. [DOI: 10.1021/jp102258y] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Manoj Kumbhakar
- Radiation & Photochemistry Division, and Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Prabhat Kumar Singh
- Radiation & Photochemistry Division, and Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Ashis Kumar Satpati
- Radiation & Photochemistry Division, and Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Sukhendu Nath
- Radiation & Photochemistry Division, and Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Haridas Pal
- Radiation & Photochemistry Division, and Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
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41
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Beija M, Fedorov A, Charreyre MT, Martinho JMG. Fluorescence Anisotropy of Hydrophobic Probes in Poly(N-decylacrylamide)-block-poly(N,N-diethylacrylamide) Block Copolymer Aqueous Solutions: Evidence of Premicellar Aggregates. J Phys Chem B 2010; 114:9977-86. [DOI: 10.1021/jp101613y] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Mariana Beija
- Centro de Química-Física Molecular and IN - Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal, and Unité Mixte CNRS-bioMérieux, École Normale Supérieure de Lyon, 46 Allée d’Italie, 69364 Lyon Cedex 07, France
| | - Aleksander Fedorov
- Centro de Química-Física Molecular and IN - Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal, and Unité Mixte CNRS-bioMérieux, École Normale Supérieure de Lyon, 46 Allée d’Italie, 69364 Lyon Cedex 07, France
| | - Marie-Thérèse Charreyre
- Centro de Química-Física Molecular and IN - Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal, and Unité Mixte CNRS-bioMérieux, École Normale Supérieure de Lyon, 46 Allée d’Italie, 69364 Lyon Cedex 07, France
| | - José M. G. Martinho
- Centro de Química-Física Molecular and IN - Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal, and Unité Mixte CNRS-bioMérieux, École Normale Supérieure de Lyon, 46 Allée d’Italie, 69364 Lyon Cedex 07, France
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Mahata A, Bose D, Ghosh D, Jana B, Bhattacharya B, Sarkar D, Chattopadhyay N. Studies of Triton X-165–β-cyclodextrin interactions using both extrinsic and intrinsic fluorescence. J Colloid Interface Sci 2010; 347:252-9. [DOI: 10.1016/j.jcis.2010.03.048] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 03/20/2010] [Accepted: 03/23/2010] [Indexed: 10/19/2022]
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43
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Singh T, Drechsler M, Müeller AHE, Mukhopadhyay I, Kumar A. Micellar transitions in the aqueous solutions of a surfactant-like ionic liquid: 1-butyl-3-methylimidazolium octylsulfate. Phys Chem Chem Phys 2010; 12:11728-35. [DOI: 10.1039/c003855p] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Mahata A, Sarkar D, Bose D, Ghosh D, Das P, Chattopadhyay N. Photophysics and rotational relaxation dynamics of a β-carboline based fluorophore in cationic alkyltrimethylammonium bromide micelles. J Colloid Interface Sci 2009; 335:234-41. [DOI: 10.1016/j.jcis.2009.03.086] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2008] [Revised: 02/28/2009] [Accepted: 03/02/2009] [Indexed: 10/20/2022]
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Mahata A, Sarkar D, Bose D, Ghosh D, Girigoswami A, Das P, Chattopadhyay N. Photophysics and Rotational Dynamics of a β-Carboline Analogue in Nonionic Micelles: Effect of Variation of Length of the Headgroup and the Tail of the Surfactant. J Phys Chem B 2009; 113:7517-26. [DOI: 10.1021/jp900575e] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Atanu Mahata
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Deboleena Sarkar
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Debosreeta Bose
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Debanjana Ghosh
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | | | - Paramita Das
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
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The use of coumarins as environmentally-sensitive fluorescent probes of heterogeneous inclusion systems. Molecules 2009; 14:210-37. [PMID: 19127249 PMCID: PMC6253935 DOI: 10.3390/molecules14010210] [Citation(s) in RCA: 310] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2008] [Revised: 12/23/2008] [Accepted: 01/04/2009] [Indexed: 11/16/2022] Open
Abstract
Coumarins, as a family of molecules, exhibit a wide range of fluorescence emission properties. In many cases, this fluorescence is extremely sensitive to the local environment of the molecule, especially the local polarity and microviscosity. In addition, coumarins show a wide range of size, shape, and hydrophobicity. These properties make them especially useful as fluorescent probes of heterogeneous environments, such as supramolecular host cavities, micelles, polymers and solids. This article will review the use of coumarins to probe such heterogeneous systems using fluorescence spectroscopy.
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Satpati AK, Kumbhakar M, Nath S, Pal H. Photoinduced electron transfer between quinones and amines in micellar media: Tuning the Marcus inversion region. J Photochem Photobiol A Chem 2008. [DOI: 10.1016/j.jphotochem.2008.08.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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48
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Seth D, Sarkar S, Sarkar N. Dynamics of solvent and rotational relaxation of Coumarin 153 in a room temperature ionic liquid, 1-butyl-3-methylimidazolium octyl sulfate, forming micellar structure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:7085-7091. [PMID: 18553948 DOI: 10.1021/la800813u] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The solvent and rotational relaxation of Coumarin 153 (C-153) was investigated by picosecond time-resolved fluorescence spectroscopy in a room temperature ionic liquid (RTIL), 1-butyl-3-methylimidazolium octyl sulfate ([C4mim][C8SO4]). This is a typical RTIL, which form micellar structure above certain concentration of the RTIL (0.031 M). Dynamic light scattering (DLS) measurements show that the average hydrodynamic diameter ( Dh) of a [C4mim][C8SO4]-water micelle is 2.8 (+/-0.2) nm. Both the solvent and rotational relaxation of C-153 are retarded in this micelle compared to the solvation time of a similar type of dye in neat water. However, the solvent relaxation in this ionic liquid surfactant is different from that of a conventional ionic surfactant. The slow component of the solvation dynamics in C8H17SO4Na or TX-100 micelle is on the nanoseconds time scale, whereas in [C4mim][C8SO4] micelle the same component is on the subnanoseconds time scale. The different molecular motions with different time scale is the main reason behind this difference in the solvation time in micelles composed of RTIL with other conventional micelles.
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Affiliation(s)
- Debabrata Seth
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, WB, India
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49
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Karunakaran V, Pfaffe M, Ioffe I, Senyushkina T, Kovalenko SA, Mahrwald R, Fartzdinov V, Sklenar H, Ernsting NP. Solvation oscillations and excited-state dynamics of 2-amino- and 2-hydroxy-7-nitrofluorene and its 2'-deoxyriboside. J Phys Chem A 2008; 112:4294-307. [PMID: 18386856 DOI: 10.1021/jp712176m] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Push-pull substituted fluorenes are considered for use as dynamic solvation probes in polynucleotides. Their fluorescence band is predicted (by simulations) to show weak spectral oscillations on the subpicosecond time scale depending on the nucleotide sequence. The oscillations reflect the local far-infrared spectrum of the environment around the probe molecule. A connection is provided by the continuum theory of polar solvation which, however, neglects molecular aspects. We examine the latter using acetonitrile solution as a test case. A collective librational solvent mode at 100 cm(-1) is observed with 2-amino-7-nitrofluorene, 2-dimethylamino-7-nitrofluorene, 2-hydroxy-7-nitrofluorene, and its 2'-deoxyriboside. Different strengths of the oscillation indicate that rotational friction of nearby acetonitrile molecules depends on the solute structure or that H bonding is involved in launching the librational coherence. Polar solvation in methanol is used for comparison. With hydroxynitrofluorenes, the observation window is limited by intersystem crossing for which rates are reported. A prominent excited-state absorption band of nitrofluorenes at 430 nm can be used to monitor polar solvation. Structural and electronic relaxation pathways are discussed with the help of quantum chemical calculations.
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50
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Chakrabarty A, Das P, Mallick A, Chattopadhyay N. Effect of Surfactant Chain Length on the Binding Interaction of a Biological Photosensitizer with Cationic Micelles. J Phys Chem B 2008; 112:3684-92. [DOI: 10.1021/jp709818d] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alok Chakrabarty
- Department of Chemistry, Jadavpur University, Calcutta 700 032, India, and Division of Frontier Material Science, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Paramita Das
- Department of Chemistry, Jadavpur University, Calcutta 700 032, India, and Division of Frontier Material Science, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Arabinda Mallick
- Department of Chemistry, Jadavpur University, Calcutta 700 032, India, and Division of Frontier Material Science, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Nitin Chattopadhyay
- Department of Chemistry, Jadavpur University, Calcutta 700 032, India, and Division of Frontier Material Science, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
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