1
|
Acharjee D, Das A, Panda MK, Barai M, Ghosh S. Facet Engineering for Decelerated Carrier Cooling in Polyhedral Perovskite Nanocrystals. NANO LETTERS 2023; 23:1946-1953. [PMID: 36825851 DOI: 10.1021/acs.nanolett.2c05107] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
We report here the hot carrier (HC) cooling time scales within polyhedral CsPbBr3 nanocrystals (NCs) characterized by different numbers of facets (6 to 26) utilizing a femtosecond upconversion setup. Interestingly, the observed cooling time scale slows many-fold (>10 times) upon opening the new facets on the NC surface. Furthermore, a temperature-dependent study reveals that cooling in multifaceted NCs is polaron mediated, where newly opened polar facets and the soft lattice of CsPbBr3 NCs play pivotal roles. Our hallmark result of slow cooling in polyhedral NCs renders an excellent opportunity for harvesting high-energy carriers by a carefully chosen molecular system. To this end, employing the hole scavenger molecule aniline, we successfully extracted hot holes from optically pumped NCs. We believe that several intriguing properties of the polyhedral NCs, including rapid polaron formation, defect-tolerant nature, and the capability of soft lattice to support slow diffusion of charge carriers, resulted in decelerated cooling.
Collapse
Affiliation(s)
- Debopam Acharjee
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| | - Ayendrila Das
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| | - Mrinal Kanti Panda
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| | - Manas Barai
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| | - Subhadip Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
- Center for Interdisciplinary Sciences (CIS), National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| |
Collapse
|
2
|
Mishra K, Acharjee D, Das A, Ghosh S. Subpicosecond Hot Hole Transfer in a Graphene Quantum Dot Composite with High Efficiency. J Phys Chem Lett 2022; 13:606-613. [PMID: 35019662 DOI: 10.1021/acs.jpclett.1c03530] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Extraction of hot carriers is of prime importance because of its potential to overcome the energy loss that limits the efficiency of an optoelectronic device. Employing a femtosecond upconversion setup, herein we report a few picoseconds carrier cooling time of colloidal graphene quantum dots (GQDs) is at least an order of magnitude slower compared to that in its bulk form. A slower carrier cooling time of GQDs compared to that of the other semiconductor quantum dots and their bulk materials is indeed a coveted property of GQDs that would allow one easy harvesting of high energy species employing a suitable molecular system as shown in this study. A subpicosecond hot hole transfer time scale has been achieved in a GQD-molecular system composite with high transfer efficiency. Our finding suggests a dramatic enhancement of the efficiency of GQD based optoelectronic devices can possibly be a reality.
Collapse
Affiliation(s)
- Krishna Mishra
- School of Chemical Sciences, National Institute of Science Education and Research, Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| | - Debopam Acharjee
- School of Chemical Sciences, National Institute of Science Education and Research, Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| | - Ayendrila Das
- School of Chemical Sciences, National Institute of Science Education and Research, Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| | - Subhadip Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research, Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| |
Collapse
|
3
|
Smortsova Y, Miannay FA, Gustavsson T, Sauvage F, Ingrosso F, Kalugin O, Idrissi A. Interrogating the mechanism of the solvation dynamics in BmimBF4/PC mixtures: A cooperative study employing time-resolved fluorescence and molecular dynamics. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
4
|
Nandi S, Pyne A, Ghosh M, Banerjee P, Ghosh B, Sarkar N. Antagonist Effects of l-Phenylalanine and the Enantiomeric Mixture Containing d-Phenylalanine on Phospholipid Vesicle Membrane. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2459-2473. [PMID: 32073868 DOI: 10.1021/acs.langmuir.9b03543] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
One of the congenital flaws of metabolism, phenylketonuria (PKU), is known to be related to the self-assembly of toxic fibrillar aggregates of phenylalanine (Phe) in blood at elevated concentrations. Our experimental findings using l-phenylalanine (l-Phe) at millimolar concentration suggest the formation of fibrillar morphologies in the dry phase, which in the solution phase interact strongly with the model membrane composed of 1,2-diacyl-sn-glycero-phosphocholine (LAPC) lipid, thereby decreasing the rigidity (or increasing the fluidity) of the membrane. The hydrophobic interaction, in addition to the electrostatic attraction of Phe with the model membrane, is found to be responsible for such phenomena. On the contrary, various microscopic observations reveal that such fibrillar morphologies of l-Phe are severely ruptured in the presence of its enantiomer d-phenylalanine (d-Phe), thereby converting the fibrillar morphologies into crushed flakes. Various biophysical studies, including the solvation dynamics experiment, suggest that this l-Phe in the presence of d-Phe, when interacting with the same model membrane, now reverts the rigidity of the membrane, i.e., increases the rigidity of the membrane, which was lost due to interaction with l-Phe exclusively. Fluorescence anisotropy measurements also support this reverse rigid character of the membrane in the presence of an enantiomeric mixture of amino acids. A comprehensive understanding of the interaction of Phe with the model membrane is further pursued at the single-molecular fluorescence detection level using fluorescence correlation spectroscopy (FCS) experiments. Therefore, our experimental conclusion interprets a linear correlation between increased permeability and enhanced fluidity of the membrane in the presence of l-Phe and certifies d-Phe as a therapeutic modulator of l-Phe fibrillar morphologies. Further, the study proposes that the rigidity of the membrane lost due to interaction with l-Phe was reinstated-in fact, increased-in the presence of the enantiomeric mixture containing both d- and l-Phe.
Collapse
|
5
|
Muttannavar VT, Melavanki R, Sharma K, Vaijayanthimala S, Shelar VM, Patil SS, Naik LR. Effect of preferential solvation and bimolecular quenching reactions on 3OCE in acetonitrile and 1,4-dioxane binary mixtures by optical absorption and fluorescence studies. LUMINESCENCE 2019; 34:924-932. [PMID: 31332940 DOI: 10.1002/bio.3692] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 05/29/2019] [Accepted: 07/04/2019] [Indexed: 01/10/2023]
Abstract
Fluorescence quenching and preferential solvation of a coumarin derivative, namely 3-[2-oxo-2-(2-oxo-2H-chromen-3-yl)-ethylidene]-1,3-dihydro-indol-2-one (3OCE), with aniline used as a quencher in solvent mixtures of acetonitrile (AN) and 1,4-dioxane (DX) was carried out at steady state. Suppan's theory of dielectric enrichment was used to understand the nonideality and dielectric enrichment in AN-DX solvent mixtures. The effect of viscosity and dielectric constant variation at room temperature were analyzed. Quenching was characterized using Stern-Volmer plots with an upward curvature. It was found that 3OCE underwent combined static and dynamic quenching that was evident from the quenching rate parameters.
Collapse
Affiliation(s)
- V T Muttannavar
- Department of Physics, JSS Science RSH PU College, Vidyagiri Dharwad, Karnataka, India
| | - Raveendra Melavanki
- Department of Physics, Ramaiah Institute of Technology Bangaluru, Karnataka, India
| | - Kalpana Sharma
- Department of Physics, Ramaiah Institute of Technology Bangaluru, Karnataka, India
| | - S Vaijayanthimala
- Department of Physics, Ramaiah Institute of Technology Bangaluru, Karnataka, India
| | - Vikas M Shelar
- Department of Physics, Faculty of Mathematical and Physical Sciences, M S Ramaiah University of Applied Science, Bengaluru, Karnataka, India
| | - S S Patil
- Department of Physics, Government R G S P U College, Kittur, Karnataka, India
| | - L R Naik
- Department of Physics, Karnataka University Dharwad, Karnataka, India
| |
Collapse
|
6
|
Mishra K, Koley S, Ghosh S. Ground-State Heterogeneity along with Fluorescent Byproducts Causes Excitation-Dependent Fluorescence and Time-Dependent Spectral Migration in Citric Acid-Derived Carbon Dots. J Phys Chem Lett 2019; 10:335-345. [PMID: 30607959 DOI: 10.1021/acs.jpclett.8b03803] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The integrity of fluorescent carbon dot (FCD) emission deserves its highest appreciation when sample purification is performed with extreme care. Several controversial phenomena of FCD fluorescence including excitation-dependent emission, spectral migration with time, and thereby violation of the Kasha-Vavilov rule, which sparked intense debate during recent reports, disappeared when we rigorously purified the as-synthesized FCD sample. Purification was performed by first visual silica column chromatography (observing the emissions under UV illumination) and subsequently prolonged membrane dialysis. Most of the surprising phenomena of FCD fluorescence reported earlier apparently arose from ground-state spectral heterogeneity of FCD sample containing a large amount of fluorescent impurities (mostly polymeric or oligomeric in nature). Observation of our ensemble spectroscopic measurements, albeit nicely matched with recent reports based on single-particle experiments, differed largely from that of other ensemble measurements. Our results reconciled a number of long-standing controversies on FCD emission mostly by emphasizing the urgency of sample purification with more scientific rigor.
Collapse
Affiliation(s)
- Krishna Mishra
- School of Chemical Sciences , National Institute of Science Education and Research, Homi Bhabha National Institute (HBNI) , Khurda 752050 , Odisha India
| | - Somnath Koley
- School of Chemical Sciences , National Institute of Science Education and Research, Homi Bhabha National Institute (HBNI) , Khurda 752050 , Odisha India
| | - Subhadip Ghosh
- School of Chemical Sciences , National Institute of Science Education and Research, Homi Bhabha National Institute (HBNI) , Khurda 752050 , Odisha India
| |
Collapse
|
7
|
Dutta R, Ghosh M, Pyne A, Sarkar N. Insight into the Dynamics of Different Fluorophores in the Interior of Aerosol OT Lamellar Structures in the Presence of Sugars: From Picosecond-to-Femtosecond Study. J Phys Chem B 2018; 123:117-129. [DOI: 10.1021/acs.jpcb.8b10609] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rupam Dutta
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Meghna Ghosh
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Arghajit Pyne
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, WB, India
| |
Collapse
|
8
|
Model-Free Estimation of Energy-Transfer Timescales in a Closely Emitting CdSe/ZnS Quantum Dot and Rhodamine 6G FRET Couple. Chem Asian J 2018; 13:3296-3303. [DOI: 10.1002/asia.201801272] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Indexed: 12/28/2022]
|
9
|
Panda MR, Koley S, Mishra K, Ghosh S. Probing of Reorganization Dynamics within the Different Phases of Themotropic Liquid Crystals. ChemistrySelect 2018. [DOI: 10.1002/slct.201702944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Manas Ranjan Panda
- School of Chemical Sciences; National Institute of Science Education and Research, HBNI; Khurda - 752050, Odisha India
| | - Somnath Koley
- School of Chemical Sciences; National Institute of Science Education and Research, HBNI; Khurda - 752050, Odisha India
| | - Krishna Mishra
- School of Chemical Sciences; National Institute of Science Education and Research, HBNI; Khurda - 752050, Odisha India
| | - Subhadip Ghosh
- School of Chemical Sciences; National Institute of Science Education and Research, HBNI; Khurda - 752050, Odisha India
| |
Collapse
|
10
|
Maiti S, Samanta P, Biswas G, Dhara D. Arm-First Approach toward Cross-Linked Polymers with Hydrophobic Domains via Hypervalent Iodine-Mediated Click Chemistry. ACS OMEGA 2018; 3:562-575. [PMID: 31457914 PMCID: PMC6641402 DOI: 10.1021/acsomega.7b01632] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 12/28/2017] [Indexed: 06/10/2023]
Abstract
In this work, synthesis of two cross-linked polymeric systems through isoxazoline ring formation using nitrile oxide-acrylate click chemistry has been described. In the first system, styrenic block copolymer with oxime-functionalized middle block was synthesized using S,S'-bis(α,α'-dimethyl-α″-acetic acid)trithiocarbonate as chain-transfer agent using reversible addition fragmentation chain-transfer technique. This block copolymer was further utilized to prepare core cross-linked star polymers by reacting with a four-arm acrylic cross-linker by employing environment-friendly, nontoxic PhI(OAc)2-mediated "click reaction" via the formation of isoxazoline ring. In the second system, two linear styrenic block copolymers, one containing oxime and another containing acrylate group, were reacted to form a cross-linked (CS) polymeric system. Formation of cross-linked polymers and isoxazoline ring was confirmed by Fourier transform infrared spectroscopy, gel permeation chromatography, NMR spectroscopy, and dynamic light scattering studies. Later, we also demonstrated that in aqueous medium these CS polymers produced polymeric nanoparticles (NPs), which can be used as potential carriers of hydrophobic drug molecules. The loading capacity of the hydrophobic domains has been investigated using coumarin dyes with varying hydrophobicity through steady-state and time-resolved spectroscopy studies. The polymeric NPs were also shown to successfully encapsulate a hydrophobic drug doxorubicin.
Collapse
Affiliation(s)
- Saikat Maiti
- Department of Chemistry, Indian Institute of Technology, Kharagpur, Kharagpur, West Bengal 721302, India
| | - Pousali Samanta
- Department of Chemistry, Indian Institute of Technology, Kharagpur, Kharagpur, West Bengal 721302, India
| | - Gargi Biswas
- Department of Chemistry, Indian Institute of Technology, Kharagpur, Kharagpur, West Bengal 721302, India
| | - Dibakar Dhara
- Department of Chemistry, Indian Institute of Technology, Kharagpur, Kharagpur, West Bengal 721302, India
| |
Collapse
|
11
|
Koley S, Panda MR, Bharadwaj K, Ghosh S. Spectroscopic and Calorimetric Studies of Molecular Recognitions in a Dendrimer-Surfactant Complex. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:817-825. [PMID: 28505448 DOI: 10.1021/acs.langmuir.7b01081] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Molecular recognitions, causing supramolecular complex formation between a hyperbranched polymer molecule (polyamidoamine (PAMAM) dendrimer generation 3) with oppositely charged surfactant sodium dodecyl sulfate (SDS) in aqueous solution, were studied by using various spectroscopic techniques and calorimetric titration of heat change measurements. Spectroscopic measurements were performed using dynamic Stokes shift (DSS), rotational anisotropy decay, and translational diffusion of a fluorescent probe molecule coumarin 153 (C153) noncovalently attached to the dendrimer-surfactant complex. All these studies unanimously confirm that the critical aggregation concentration (CAC) of SDS falls to ∼0.8 mM (from its critical micelle concentration (CMC) ∼ 8 mM) in the presence of ∼0.2 mM dendrimer. Further studies of isothermal titration calorimetry (ITC) measurement show that the CAC of SDS in the presence of dendrimer remains invariant to the dendrimer concentration. Complexation reaction between SDS and dendrimer is highly exothermic in nature. A maximum heat release (ΔH∼ -6.6 kJ/mol of SDS binding) was observed at a SDS-to-dendrimer mole ratio of ∼3-5; where up to 3 to 5 SDS molecules were encapsulated by one dendrimer molecule to form dendrimer-SDS encapsulation complex. When negatively charged SDS was replaced with a positively charged surfactant dodecyl-trimethylammonium-bromide (DTAB), we found that the DTAB hardly interacted with positively charged dendrimer due to the charge-charge repulsions.
Collapse
Affiliation(s)
- Somnath Koley
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI , Khurda-752050, Odisha, India
| | - Manas Ranjan Panda
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI , Khurda-752050, Odisha, India
| | - Kiran Bharadwaj
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI , Khurda-752050, Odisha, India
| | - Subhadip Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI , Khurda-752050, Odisha, India
| |
Collapse
|
12
|
Grimmelsmann L, Schuabb V, Tekin B, Winter R, Nuernberger P. Impact of kilobar pressures on ultrafast triazene and thiacyanine photodynamics. Phys Chem Chem Phys 2018; 20:18169-18175. [DOI: 10.1039/c8cp03334j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Application of high hydrostatic pressure leads to changes in (sub)picosecond emission dynamics, depending on the mechanism at work for the photoreaction.
Collapse
Affiliation(s)
| | - Vitor Schuabb
- Physikalische Chemie I – Biophysikalische Chemie
- Technische Universität Dortmund
- 44227 Dortmund
- Germany
| | - Beritan Tekin
- Physikalische Chemie II
- Ruhr-Universität Bochum
- 44780 Bochum
- Germany
| | - Roland Winter
- Physikalische Chemie I – Biophysikalische Chemie
- Technische Universität Dortmund
- 44227 Dortmund
- Germany
| | | |
Collapse
|
13
|
Bolze T, Wree JL, Kanal F, Schleier D, Nuernberger P. Ultrafast Dynamics of a Fluorescent Tetrazolium Compound in Solution. Chemphyschem 2017; 19:138-147. [DOI: 10.1002/cphc.201700831] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 10/12/2017] [Indexed: 12/18/2022]
Affiliation(s)
- Tom Bolze
- Physikalische Chemie II; Ruhr-Universität Bochum; Universitätsstraße 150 44801 Bochum Germany
| | - Jan-Lucas Wree
- Physikalische Chemie II; Ruhr-Universität Bochum; Universitätsstraße 150 44801 Bochum Germany
| | - Florian Kanal
- Institut für Physikalische und Theoretische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Domenik Schleier
- Institut für Physikalische und Theoretische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Patrick Nuernberger
- Physikalische Chemie II; Ruhr-Universität Bochum; Universitätsstraße 150 44801 Bochum Germany
| |
Collapse
|
14
|
Koley S, Ghosh S. Encapsulation and Residency of a Hydrophobic Dye within the Water-Filled Interior of a PAMAM Dendrimer Molecule. J Phys Chem B 2017; 121:1930-1940. [DOI: 10.1021/acs.jpcb.6b10176] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Somnath Koley
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Khurda 752050, Odisha, India
| | - Subhadip Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Khurda 752050, Odisha, India
| |
Collapse
|
15
|
Kumbhakar M, Pal H. Reply to "Comment on 'Observation of the Marcus Inverted Region for Bimolecular Photoinduced Electron-Transfer Reactions in Viscous Media'". J Phys Chem B 2016; 120:9804-9. [PMID: 27537065 DOI: 10.1021/acs.jpcb.6b07633] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Manoj Kumbhakar
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre , Trombay, Mumbai 400 085, India
| | - Haridas Pal
- Radiation and Photochemistry Division, Bhabha Atomic Research Centre , Trombay, Mumbai 400 085, India
| |
Collapse
|
16
|
Effect of viscosity on photoinduced electron transfer reaction: An observation of the Marcus inverted region in homogeneous solvents. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.08.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
17
|
Angulo G, Brucka M, Gerecke M, Grampp G, Jeannerat D, Milkiewicz J, Mitrev Y, Radzewicz C, Rosspeintner A, Vauthey E, Wnuk P. Characterization of dimethylsulfoxide/glycerol mixtures: a binary solvent system for the study of “friction-dependent” chemical reactivity. Phys Chem Chem Phys 2016; 18:18460-9. [DOI: 10.1039/c6cp02997c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The properties of binary mixtures of dimethylsulfoxide and glycerol, measured using several techniques, are reported.
Collapse
|
18
|
Koley S, Ghosh S. A deeper insight into an intriguing acetonitrile–water binary mixture: synergistic effect, dynamic Stokes shift, fluorescence correlation spectroscopy, and NMR studies. Phys Chem Chem Phys 2016; 18:32308-32318. [DOI: 10.1039/c6cp05024g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An insight study reveals the strong synergistic solvation behaviours from reporter dye molecules within the acetonitrile (ACN)–water (WT) binary mixture.
Collapse
Affiliation(s)
- Somnath Koley
- School of Chemical Sciences
- National Institute of Science Education and Research
- HBNI
- Bhubaneswar 751005
- India
| | - Subhadip Ghosh
- School of Chemical Sciences
- National Institute of Science Education and Research
- HBNI
- Bhubaneswar 751005
- India
| |
Collapse
|
19
|
Araque JC, Hettige JJ, Margulis CJ. Ionic liquids—Conventional solvent mixtures, structurally different but dynamically similar. J Chem Phys 2015; 143:134505. [DOI: 10.1063/1.4932331] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Juan C. Araque
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, USA
| | | | | |
Collapse
|
20
|
Study of Microheterogeneity in Acetonitrile-Water Binary Mixtures by using Polarity-Resolved Solvation Dynamics. Chemphyschem 2015; 16:3518-26. [DOI: 10.1002/cphc.201500663] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Indexed: 11/07/2022]
|
21
|
Homocianu M, Airinei A. Investigations of absorption and emission spectral data in mixed liquid media. A short review of recent literature. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.06.042] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
22
|
Roy B, Satpathi S, Gavvala K, Koninti RK, Hazra P. Solvation Dynamics in Different Phases of the Lyotropic Liquid Crystalline System. J Phys Chem B 2015; 119:11721-31. [PMID: 26258397 DOI: 10.1021/acs.jpcb.5b04370] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Reverse hexagonal (HII) liquid crystalline material based on glycerol monooleate (GMO) is considered as a potential carrier for drugs and other important biomolecules due to its thermotropic phase change and excellent morphology. In this work, the dynamics of encapsulated water, which plays important role in stabilization and formation of reverse hexagonal mesophase, has been investigated by time dependent Stokes shift method using Coumarin-343 as a solvation probe. The formation of the reverse hexagonal mesophase (HII) and transformation to the L2 phase have been monitored using small-angle X-ray scattering and polarized light microscopy experiments. REES studies suggest the existence of different polar regions in both HII and L2 systems. The solvation dynamics study inside the reverse hexagonal (HII) phase reveals the existence of two different types of water molecules exhibiting dynamics on a 120-900 ps time scale. The estimated diffusion coefficients of both types of water molecules obtained from the observed dynamics are in good agreement with the measured diffusion coefficient collected from the NMR study. The calculated activation energy is found to be 2.05 kcal/mol, which is associated with coupled rotational-translational water relaxation dynamics upon the transition from "bound" to "quasi-free" state. The observed ∼2 ns faster dynamics of the L2 phase compared to the HII phase may be associated with both the phase transformation as well as thermotropic effect on the relaxation process. Microviscosities calculated from time-resolved anisotropy studies infer that the interface is almost ∼22 times higher viscous than the central part of the cylinder. Overall, our results reveal the unique dynamical features of water inside the cylinder of reverse hexagonal and inverse micellar phases.
Collapse
Affiliation(s)
- Bibhisan Roy
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune, 411008, Maharashtra, India
| | - Sagar Satpathi
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune, 411008, Maharashtra, India
| | - Krishna Gavvala
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune, 411008, Maharashtra, India
| | - Raj Kumar Koninti
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune, 411008, Maharashtra, India
| | - Partha Hazra
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) , Pune, 411008, Maharashtra, India
| |
Collapse
|
23
|
Kuchlyan J, Banik D, Kundu N, Roy A, Sarkar N. Interaction of fluorescence dyes with 5-fluorouracil: A photoinduced electron transfer study in bulk and biologically relevant water. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.08.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
24
|
Koley S, Kaur H, Ghosh S. Probe dependent anomalies in the solvation dynamics of coumarin dyes in dimethyl sulfoxide–glycerol binary solvent: confirming the local environments are different for coumarin dyes. Phys Chem Chem Phys 2014; 16:22352-63. [DOI: 10.1039/c4cp03525a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
25
|
Kumbhakar M, Manna A, Sayed M, Kumar A, Pal H. Observation of the Marcus Inverted Region for Bimolecular Photoinduced Electron-Transfer Reactions in Viscous Media. J Phys Chem B 2014; 118:10704-15. [DOI: 10.1021/jp506885r] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Manoj Kumbhakar
- Radiation
and Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Arpan Manna
- Physical
and Material Chemistry Division, CSIR-National Chemical Laboratory, H. J. Bhabha Road, Pune 411 008, India
| | - Mhejabeen Sayed
- Radiation
and Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Anil Kumar
- Physical
and Material Chemistry Division, CSIR-National Chemical Laboratory, H. J. Bhabha Road, Pune 411 008, India
| | - Haridas Pal
- Radiation
and Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| |
Collapse
|