1
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Castillo M, Pho C, Naumov AV, Dzyuba SV. Modulating Chirality-Selective Photoluminescence of Single-Walled Carbon Nanotubes by Ionic Liquids. J Phys Chem Lett 2018; 9:6689-6694. [PMID: 30399316 DOI: 10.1021/acs.jpclett.8b02734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The chirality-selective near-infrared emission of surfactant-stabilized single-wall carbon nanotubes could be controlled by simply varying the anion of the commonly used 1-butyl-3-methylimidazolium ionic liquids. This result advances the notion of the designer solvent ability of ionic liquids and provides opportunities for modulating the properties of nanomaterials.
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Affiliation(s)
- Marlius Castillo
- Department of Chemistry and Biochemistry , Texas Christian University , Fort Worth , Texas 76129 , United States
| | - Christine Pho
- Department of Physics and Astronomy , Texas Christian University , Fort Worth , Texas 76129 , United States
| | - Anton V Naumov
- Department of Physics and Astronomy , Texas Christian University , Fort Worth , Texas 76129 , United States
| | - Sergei V Dzyuba
- Department of Chemistry and Biochemistry , Texas Christian University , Fort Worth , Texas 76129 , United States
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2
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Pal M, Yadav A, Pandey S. Aggregation of Carbocyanine Dyes in Choline Chloride-Based Deep Eutectic Solvents in the Presence of an Aqueous Base. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9781-9792. [PMID: 28830142 DOI: 10.1021/acs.langmuir.7b01981] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Deep eutectic solvents (DESs) have shown potential as novel media to support molecular aggregation. The self-aggregation behavior of two common and popular carbocyanine dyes, 5,5',6,6'-tetrachloro-1,1'-diethyl-3,3'-di(4-sulfobutyl)-benzimidazole carbocyanine (TDBC) and 5,5'-dichloro-3,3'-di(3-sulfopropyl)-9-methyl-benzothiacarbo cyanine (DMTC), is investigated within DES-based systems under ambient conditions. Although TDBC is known to form J-aggregates in basic aqueous solution, DMTC forms H-aggregates under similar conditions. The DESs used, glyceline and reline, are composed of salt choline chloride and two vastly different H-bond donors, glycerol and urea, respectively, in 1:2 mol ratios. Both DESs in the presence of base are found to support J-aggregates of TDBC. These fluorescent J-aggregates are characterized by small Stokes' shifts and subnanosecond fluorescence lifetimes. Under similar conditions, DMTC forms fluorescent H-aggregates along with J-aggregates within the two DES-based systems. The addition of cationic surfactant cetyltrimethylammonium bromide (CTAB) below its critical micelle concentration (cmc) to a TDBC solution of aqueous base-added glyceline shows the prominent presence of J-aggregates, and increasing the CTAB concentration to above cmc results in the disruption of J-aggregates and the formation of unprecedented H-aggregates. DMTC exclusively forms H-aggregates within a CTAB solution of aqueous base-added glyceline irrespective of the surfactant concentration. Anionic surfactant, sodium dodecylsulfate (SDS), present below its cmc within aqueous base-added DESs supports J-aggregation by TDBC; for similar SDS addition, DMTC forms H-aggregates within the glyceline-based system whereas both H- and J-aggregates exist within the reline-based system. A comparison of the carbocyanine dye behavior in various aqueous base-added DES systems to that in aqueous basic media reveals contrasting aggregation tendencies and/or efficiencies. Surfactants as additives are demonstrated to control and modulate carbocyanine dye self-aggregation within DES-based media. The unique nature of DESs as alternate media toward affecting cyanine dye aggregation is highlighted.
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Affiliation(s)
- Mahi Pal
- Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
| | - Anita Yadav
- Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
| | - Siddharth Pandey
- Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
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3
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Zagami R, Trapani M, Castriciano M, Romeo A, Mineo P, Scolaro LM. Synthesis, characterization and aggregation behavior of room temperature ionic liquid based on porphyrin- trihexyl(tetradecyl)phosphonium adduct. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2016.12.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Topal SZ, Ün ŞŞ, Bretonnière Y, Kostakoğlu ST. New designed naphthalimide-phthalocyanine pentads: Synthesis, photophysical and photochemical properties in DMSO and room temperature ionic liquids. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.09.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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5
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Jameson LP, Dzyuba SV. Effect of imidazolium room-temperature ionic liquids on aggregation of amphotericin B: a circular dichroism study. RSC Adv 2015. [DOI: 10.1039/c5ra17077j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The aggregate–monomer equilibrium of amphotericin B could be controlled by the structure of the room-temperature ionic liquid.
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6
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Excited-state solvation dynamics of meso-tetrakis(4-sulfonatophenyl) porphyrin in solid imidazolium-sulfonate-based ionic liquids. CHINESE SCIENCE BULLETIN-CHINESE 2014. [DOI: 10.1007/s11434-013-0023-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Quezada D, Honores J, García M, Armijo F, Isaacs M. Electrocatalytic reduction of carbon dioxide on a cobalt tetrakis(4-aminophenyl)porphyrin modified electrode in BMImBF4. NEW J CHEM 2014. [DOI: 10.1039/c4nj00519h] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electro-catalytic reduction of CO2 at −0.8 V vs. Ag/AgCl has been studied with poly-Co(ii)-porphyrin on ITO in BMImBF4 as reaction media.
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Affiliation(s)
- Diego Quezada
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Macul, Chile
| | - Jessica Honores
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Macul, Chile
| | - Macarena García
- Facultad de Quimica y Biologia
- Universidad de Santiago de Chile
- Estación Central, Chile
| | - Francisco Armijo
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Macul, Chile
| | - Mauricio Isaacs
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Macul, Chile
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8
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Giri NK, Banerjee A, Scott RWJ, Paige MF, Steer RP. Spectroscopic and photophysical study of the demetallation of a zinc porphyrin and the aggregation of its free base in a tetraalkylphosphonium ionic liquid. Phys Chem Chem Phys 2014; 16:26252-60. [DOI: 10.1039/c4cp04257c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dissolving zinc tetraphenylporphyrin in the tetraalkylphosphonium chloride ionic liquid P4448Cl results in progressive demetallation of the solute and quantitative production of the free base porphyrin.
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Affiliation(s)
- Neeraj K. Giri
- Department of Chemistry
- University of Saskatchewan
- Saskatoon, Canada
| | | | | | - Matthew F. Paige
- Department of Chemistry
- University of Saskatchewan
- Saskatoon, Canada
| | - Ronald P. Steer
- Department of Chemistry
- University of Saskatchewan
- Saskatoon, Canada
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9
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Rai R, Kumar V, Pandey S. Aggregation of a model porphyrin within poly(ethylene glycol) (PEG): effect of water, PEG molecular weight, ionic liquids, salts, and temperature. Phys Chem Chem Phys 2014; 16:7263-73. [DOI: 10.1039/c4cp00103f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porphyrin J-aggregation is facilitated in 10 wt% water-added PEGs at pH 1; it increases with PEG MW and is controlled by RTILs.
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Affiliation(s)
- Rewa Rai
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016, India
| | - Vinod Kumar
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016, India
| | - Siddharth Pandey
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016, India
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10
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Kumar V, Pandey A, Pandey S. Proton-Transfer Reactions of Acridine in Water-Containing Ionic-Liquid-Rich Mixtures. Chemphyschem 2013; 14:3944-52. [DOI: 10.1002/cphc.201300817] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 09/25/2013] [Indexed: 11/11/2022]
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11
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Zhao YF, Liu LL, Jin WJ. The solvation dynamics at millisecond scale of Pd(II)-meso-tetra(4-carboxyphenyl)porphine in solid imidazolium-sulfonate-based ionic liquids. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 112:146-151. [PMID: 23666349 DOI: 10.1016/j.saa.2013.04.056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2013] [Revised: 04/07/2013] [Accepted: 04/10/2013] [Indexed: 06/02/2023]
Abstract
The phosphorescence behavior and solvation dynamics of Pd(II)-meso-tetra(4-carboxyphenyl)porphine (Pd-TCPP) in three imidazolium ionic liquids (ILs) has been studied. The phosphorescence excitation and emission position of Pd-TCPP are dependent on the polarity, constituent ions and structure of the ILs. The phosphorescence decay of Pd-TCPP in these ILs is bi-exponential, and the average lifetimes decrease in the following order: 0.844 ms in 1-butylimidazolium p-toluenesulfonate (HBIMTS)>0.472 ms in 1-butylimidazolium trifluoromethane sulfonate (HBIMTfO)>0.412 ms in 1-butyl-3-methylimidazolium p-toluenesulfonate (BMIMTS). The time-resolved phosphorescence emission spectra (TRPES) of Pd-TCPP display apparently blue-shifts with increasing time. The normalized Stokes shift correlation functions C(t) of Pd-TCPP in these ILs are mono-exponential, and the solvation relaxation times are 2.97, 47.7 and 12.1 ms in HBIMTfO, HBIMTS and BMIMTS, respectively. The solvation dynamics may be attributed to the collective motion of the ion pairs composed of imidazolium cations and counter anions to the area surrounding Pd-TCPP.
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Affiliation(s)
- Yun Fang Zhao
- College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
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12
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Zhao YF, Gao GY, Wang SF, Jin WJ. The solvation dynamics and rotational relaxation of protonated meso-tetrakis(4-sulfonatophenyl)porphyrin in imidazolium-based ionic liquids measured with a streak camera. J PORPHYR PHTHALOCYA 2013. [DOI: 10.1142/s1088424613500442] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
For the steady-state behavior of diprotonated tetrakis(4-sulfonatophenyl)porphyrin (H4TPPS2-) in five imidazolium ionic liquids (ILs), the absorption positions of H4TPPS2- primarily depend on the constituent ions of the ILs whereas the emission positions of H4TPPS2- strongly depend on the polarity of the ILs. The fluorescence spectra of H4TPPS2- with different excitation wavelengths show no red-edge effect in our system. The dynamics of H4TPPS2- in ILs is further studied with a streak camera, and the relaxation process of ILs occurs on two different time scales. The short lived component attributed to the local motion of the cations and the anions around the porphine core varies from 32 to 196 ps. The long lived one originated from the collective diffusive motions of the cations and anions varies from 460 to 1072 ps. The average solvation time depends on the viscosity of the ILs. The rotational relaxation times of H4TPPS2- decrease as the viscosity of the ILs decreases.
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Affiliation(s)
- Yun Fang Zhao
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
| | - Guang Yu Gao
- Department of Physics, Peking University, Beijing, 100871, P. R. China
| | - Shu Feng Wang
- Department of Physics, Peking University, Beijing, 100871, P. R. China
| | - Wei Jun Jin
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
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13
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Jameson LP, Dzyuba SV. Circular dichroism studies on intermolecular interactions of amphotericin B in ionic liquid-rich environments. Chirality 2013; 25:427-32. [PMID: 23695916 DOI: 10.1002/chir.22142] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Accepted: 11/16/2012] [Indexed: 11/12/2022]
Abstract
Aggregation of amphotericin B (AmB) in an ionic liquid-rich environment was investigated using circular dichroism (CD) spectroscopy. It was found that nature of the ionic liquids' anion had a strong impact not only on the aggregation of AmB, but more importantly on the nature of AmB aggregates, as observed in the asymmetry of the exciton couplet of the aggregate in CD spectra. Unique CD signals for AmB aggregates were observed in three different 1-butyl-3-methylimidazolium ionic liquid solutions: [C4 -mim]Br favored the formation of AmB aggregates that were similar to those found in water, whereas [C4 -mim]BF4 and [C4 -mim]NO3 produced AmB aggregates that were different from each other and those found in water. The obtained results suggest that the designer solvent ability of ionic liquids could be expanded to address numerous intermolecular processes.
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Affiliation(s)
- Laramie P Jameson
- Department of Chemistry, Texas Christian University, Fort Worth, TX 76129, USA
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14
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Fabrication and characterizations of silica composite microspheres immobilized with porphyrins and their photocatalytic properties. J Taiwan Inst Chem Eng 2012. [DOI: 10.1016/j.jtice.2012.05.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Liu LL, Zhao YF, Jin WJ. Investigation on the effect of water on the spectroscopic behaviors of TPPS in acidic imidazolium-based ionic liquids. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424612501118] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The effect of water on the spectroscopic behaviors of meso-tetrakis-(4-sulfonatophenyl) porphyrin (TPPS) in acidic 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) and 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4) is investigated by spectroscopic methods. In acidic ionic liquids without water, the Soret bands of the protonated form (H4TPPS2-) and J-aggregates of TPPS are centered at 449 and 469 nm, respectively, and the Q-band is centered at 679 nm. When increasing the content of water, the Soret band of H4TPPS2- is blue-shifted to 430 nm. However, the Soret and Q-bands of J-aggregates are red-shifted to 487 and 701 nm, respectively. The NMR and pyrene-scale polarity experiments reveal that the change of the bulk environment is responsible for the red-shift of J-aggregates and the blue-shift of H4TPPS2-. According to the analysis of the fluorescence spectra, the content of H4TPPS2- increases gradually with the addition of water, while the content of H2TPPS4- takes the opposite trend. Simultaneously, the content of J-aggregates decreases substantially when the addition of water is 0 ~ ca. 12 μL (or 13 μL) but it decreases slowly with further addition of water. Remarkably, the fluorescence intensity of J-aggregates is relatively strong. In addition, the fluorescence of J-aggregates can be detected when λex is set at both λex for TPPS monomers and λex for J-aggregates. While the fluorescence of TPPS monomers can be detected only when λex is set at λex for monomers. Moreover, with the addition of water, the fluorescence lifetimes of H2TPPS4- and H4TPPS2- increase from 3.202 and 0.830 ns to 9.623 and 2.964 ns, respectively.
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Affiliation(s)
- Li Li Liu
- College of Chemistry, Beijing Normal University, Beijing 100875, P.R. China
| | - Yun Fang Zhao
- College of Chemistry, Beijing Normal University, Beijing 100875, P.R. China
| | - Wei Jun Jin
- College of Chemistry, Beijing Normal University, Beijing 100875, P.R. China
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16
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Kumar V, Pandey S. Selective Quenching of 2-Naphtholate Fluorescence by Imidazolium Ionic Liquids. J Phys Chem B 2012; 116:12030-7. [DOI: 10.1021/jp3080817] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vinod Kumar
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Siddharth Pandey
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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17
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Naushad M, Alothman ZA, Khan AB, Ali M. Effect of ionic liquid on activity, stability, and structure of enzymes: a review. Int J Biol Macromol 2012; 51:555-60. [PMID: 22732130 DOI: 10.1016/j.ijbiomac.2012.06.020] [Citation(s) in RCA: 184] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Revised: 06/12/2012] [Accepted: 06/14/2012] [Indexed: 10/28/2022]
Abstract
Ionic liquids have shown their potential as a solvent media for many enzymatic reactions as well as protein preservation, because of their unusual characteristics. It is also observed that change in cation or anion alters the physiochemical properties of the ionic liquids, which in turn influence the enzymatic reactions by altering the structure, activity, enatioselectivity, and stability of the enzymes. Thus, it is utmost need of the researchers to have full understanding of these influences created by ionic liquids before choosing or developing an ionic liquid to serve as solvent media for enzymatic reaction or protein preservation. So, in the present review, we try to shed light on effects of ionic liquids chemistry on structure, stability, and activity of enzymes, which will be helpful for the researchers in various biocatalytic applications.
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Affiliation(s)
- Mu Naushad
- Advanced Materials Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
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18
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Pandey S, Ali M, Kamath G, Pandey S, Baker SN, Baker GA. Binding of the ionic liquid cation 1-alkyl-3-methylimidazolium to p-tetranitrocalix[4]arene probed by fluorescent indicator displacement. Anal Bioanal Chem 2012; 403:2361-6. [DOI: 10.1007/s00216-012-5980-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 03/20/2012] [Accepted: 03/26/2012] [Indexed: 10/28/2022]
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19
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Rich CC, McHale JL. Influence of hydrogen bonding on excitonic coupling and hierarchal structure of a light-harvesting porphyrin aggregate. Phys Chem Chem Phys 2012; 14:2362-74. [DOI: 10.1039/c2cp23362b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Collini E. Cooperative effects to enhance two-photon absorption efficiency: intra- versus inter-molecular approach. Phys Chem Chem Phys 2012; 14:3725-36. [DOI: 10.1039/c2cp24030k] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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21
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Das S, Powe AM, Baker GA, Valle B, El-Zahab B, Sintim HO, Lowry M, Fakayode SO, McCarroll ME, Patonay G, Li M, Strongin RM, Geng ML, Warner IM. Molecular Fluorescence, Phosphorescence, and Chemiluminescence Spectrometry. Anal Chem 2011; 84:597-625. [DOI: 10.1021/ac202904n] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Susmita Das
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Aleeta M. Powe
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40208, United States
| | - Gary A. Baker
- Department of Chemistry, University of Missouri−Columbia, Columbia, Missouri 65211-7600, United States
| | - Bertha Valle
- Department of Chemistry, Texas Southern University, Houston, Texas 77004, United States
| | - Bilal El-Zahab
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Herman O. Sintim
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Mark Lowry
- Department of Chemistry, Portland State University, Portland, Oregon 97207, United States
| | - Sayo O. Fakayode
- Department of Chemistry, Winston-Salem State University, Winston-Salem, North Carolina 27110, United States
| | - Matthew E. McCarroll
- Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, Illinois 62901-4409, United States
| | - Gabor Patonay
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30302-4098, United States
| | - Min Li
- Process Development Center, Albemarle Corporation, Baton Rouge, Louisiana 70805, United States
| | - Robert M. Strongin
- Department of Chemistry, Portland State University, Portland, Oregon 97207, United States
| | - Maxwell L. Geng
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Isiah M. Warner
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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Kumar V, Baker GA, Pandey S, Baker SN, Pandey S. Contrasting behavior of classical salts versus ionic liquids toward aqueous phase J-aggregate dissociation of a cyanine dye. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:12884-12890. [PMID: 21932792 DOI: 10.1021/la203317t] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The effect of addition of ionic liquids (ILs) on the aggregation behavior of a cyanine dye, 5,5',6,6'-tetrachloro-1,1'-diethyl-3,3'-di(4-sulfobutyl)-benzimidazolocarbocyanine (TDBC), was investigated. In basic aqueous buffer solutions (pH ≥ 10), TDBC preferably exists in its J-aggregated form. Addition of hydrophilic ILs > 5 wt % is observed to disrupt the TDBC J-aggregates, converting them to monomer form most likely because of the interaction between bulky IL cation and the J-aggregates in a time-dependent fashion. This is evidenced by the observed increase in monomer band absorbance at the expense of the absorbance band due to J-aggregates over time. Inorganic salts at similar molar concentrations do not cause this phenomenon but instead induce TDBC precipitation. At low concentrations (<5 wt %), the added IL acts similarly to the inorganic salts, reducing the overall absorbance of TDBC in the solution most likely due to cation exchange causing TDBC precipitation. Addition of a molecular solvent, ethanol, at 15 wt % results in an initial increase in monomer absorbance, albeit to a much lesser extent than for the corresponding molar fraction of IL, which then decreases over time with recovery of J-aggregate absorbance--quite opposite the time-dependent behavior seen for TDBC in PB at pH 12.0 with >5 wt % IL. The unique and dual behavior of ILs as an additive toward affecting cyanine dye aggregation is demonstrated.
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Affiliation(s)
- Vinod Kumar
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, India
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23
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Zhang L, Tian Y, Liu M. Ionic liquid induced spontaneous symmetry breaking: emergence of predominant handedness during the self-assembly of tetrakis(4-sulfonatophenyl)porphyrin (TPPS) with achiral ionic liquid. Phys Chem Chem Phys 2011; 13:17205-9. [DOI: 10.1039/c1cp21767d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Kumar V, Baker GA, Pandey S. Ionic liquid-controlled J- versus H-aggregation of cyanine dyes. Chem Commun (Camb) 2011; 47:4730-2. [DOI: 10.1039/c1cc00080b] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Ali M, Dutta P, Pandey S. Effect of Ionic Liquid on Prototropic and Solvatochromic Behavior of Fluorescein. J Phys Chem B 2010; 114:15042-51. [DOI: 10.1021/jp106601a] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maroof Ali
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Poulami Dutta
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Siddharth Pandey
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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26
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Trivedi S, Malek NI, Behera K, Pandey S. Temperature-Dependent Solvatochromic Probe Behavior within Ionic Liquids and (Ionic Liquid + Water) Mixtures. J Phys Chem B 2010; 114:8118-25. [DOI: 10.1021/jp102217u] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Shruti Trivedi
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India, and Applied Chemistry Department, Sardar Vallabhbhai National Institute of Technology (SVNIT), Surat 395007, India
| | - Naved I. Malek
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India, and Applied Chemistry Department, Sardar Vallabhbhai National Institute of Technology (SVNIT), Surat 395007, India
| | - Kamalakanta Behera
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India, and Applied Chemistry Department, Sardar Vallabhbhai National Institute of Technology (SVNIT), Surat 395007, India
| | - Siddharth Pandey
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India, and Applied Chemistry Department, Sardar Vallabhbhai National Institute of Technology (SVNIT), Surat 395007, India
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Ali M, Kumar V, Pandey S. Unusual fluorescein prototropism within aqueous acidic 1-butyl-3-methylimidazolium tetrafluoroborate solution. Chem Commun (Camb) 2010; 46:5112-4. [DOI: 10.1039/c0cc00620c] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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