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Lage EV, Pillai SA, Pal H, Bahadur A, Casas M, Sández-Macho I, Bahadur P. Urea induced changes in self-assembly and aggregate microstructures of amphiphilic star block copolymers with widely different hydrophobicity. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.10.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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2
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Tuning the self-assembly of EO-PO block copolymers and quercetin solubilization in the presence of some common pharmacuetical excipients: A comparative study on a linear triblock and a starblock copolymer. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.06.035] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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4
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Shi J, Shen X. Construction of Supramolecular Self-Assemblies Based on the Biamphiphilic Ionic Liquid−β-Cyclodextrin System. J Phys Chem B 2014; 118:1685-95. [DOI: 10.1021/jp4113188] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jianfeng Shi
- Beijing
National Laboratory
for Molecular Sciences (BNLMS), Fundamental Science on Radiochemistry
and Radiation Chemistry Laboratory, College of Chemistry and Molecular
Engineering, Peking University, Beijing 100871, P. R. China
| | - Xinghai Shen
- Beijing
National Laboratory
for Molecular Sciences (BNLMS), Fundamental Science on Radiochemistry
and Radiation Chemistry Laboratory, College of Chemistry and Molecular
Engineering, Peking University, Beijing 100871, P. R. China
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5
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Further understanding of the multiple equilibria interaction pattern between ionic liquid and β-cyclodextrin. J INCL PHENOM MACRO 2013. [DOI: 10.1007/s10847-013-0354-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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6
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WU AIHUA, SHEN XINGHAI, GAO HONGCHENG. CYCLODEXTRIN NANOTUBE INDUCED BY 4,4′-BIS(2-BENZOXAZOLYL) STILBENE. INTERNATIONAL JOURNAL OF NANOSCIENCE 2011. [DOI: 10.1142/s0219581x06004267] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The formation of β- and γ-cyclodextrin (CD) nanotubes induced by the molecule 4,4′-bis(2-benzoxazolyl) stilbene (BOS) was investigated by fluorescence anisotropy. Using the Perrin–Webber formula, the average number of cyclodextrin (n CD ) in each nanotube was estimated and the results suggested that the n CD value in the γ-CD system is larger than that in the β-CD system. Hydrogen-bonding between the hydroxyl groups of neighboring CDs was found to be an important contribution to the formation of cyclodextrin nanotube on the basis of the pH effect study. The temperature effect study showed that this nanotube was thermostable at T ≤ 303 K , while it was gradually collapsed at higher temperature.
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Affiliation(s)
- AIHUA WU
- Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - XINGHAI SHEN
- Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - HONGCHENG GAO
- Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
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7
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Zhang J, Shen X. Multiple Equilibria Interaction Pattern between the Ionic Liquids CnmimPF6 and β-Cyclodextrin in Aqueous Solutions. J Phys Chem B 2011; 115:11852-61. [DOI: 10.1021/jp206418m] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jingjing Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xinghai Shen
- Beijing National Laboratory for Molecular Sciences (BNLMS), Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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8
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Paul BK, Guchhait N. Constrained photophysics of an ESIPT probe within β-cyclodextrin nanocavity and chaotrope-induced perturbation of the binding phenomenon: Implication towards hydrophobic interaction mechanism between urea and the molecular probe. J Colloid Interface Sci 2011; 353:237-47. [DOI: 10.1016/j.jcis.2010.09.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Revised: 09/04/2010] [Accepted: 09/08/2010] [Indexed: 01/30/2023]
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9
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10
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Photophysical Studies on the Interaction of Acridinedione Dyes with Universal Protein Denaturant: Guanidine Hydrochloride. J Fluoresc 2010; 20:993-1002. [DOI: 10.1007/s10895-010-0646-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2008] [Accepted: 03/18/2010] [Indexed: 10/19/2022]
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11
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Hierrezuelo JM, Molina-Bolívar JA, Carnero Ruiz C. On the Urea Action Mechanism: A Comparative Study on the Self-Assembly of Two Sugar-Based Surfactants. J Phys Chem B 2009; 113:7178-87. [DOI: 10.1021/jp811198d] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- J. M. Hierrezuelo
- Grupo de Fluidos Estructurados y Sistemas Anfifílicos, Departamento de Física Aplicada II, Escuela Universitaria Politécnica, Universidad de Málaga, Campus de El Ejido, 29071-Málaga, Spain
| | - J. A. Molina-Bolívar
- Grupo de Fluidos Estructurados y Sistemas Anfifílicos, Departamento de Física Aplicada II, Escuela Universitaria Politécnica, Universidad de Málaga, Campus de El Ejido, 29071-Málaga, Spain
| | - C. Carnero Ruiz
- Grupo de Fluidos Estructurados y Sistemas Anfifílicos, Departamento de Física Aplicada II, Escuela Universitaria Politécnica, Universidad de Málaga, Campus de El Ejido, 29071-Málaga, Spain
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12
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He Y, Chen Q, Xu C, Zhang J, Shen X. Interaction between Ionic Liquids and β-Cyclodextrin: A Discussion of Association Pattern. J Phys Chem B 2008; 113:231-8. [DOI: 10.1021/jp808540m] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yifeng He
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Qingde Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Chao Xu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Jingjing Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xinghai Shen
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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13
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Interaction between β-cyclodextrin and ionic liquids in aqueous solutions investigated by a competitive method using a substituted 3H-indole probe. J Photochem Photobiol A Chem 2008. [DOI: 10.1016/j.jphotochem.2008.01.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Spectral and photophysical studies on the inclusion complexation between Triton X-100 and β-cyclodextrin: A competitive method using a substituted 3H-indole probe. J Photochem Photobiol A Chem 2008. [DOI: 10.1016/j.jphotochem.2007.06.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Wu A, Shen X, Gao H. Investigation on photophysical properties of a substituted 3H-indole-modified β-cyclodextrin. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2006.05.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Wu A, Shen X, He Y. Micrometer-sized rodlike structure formed by the secondary assembly of cyclodextrin nanotube. J Colloid Interface Sci 2006; 302:87-94. [PMID: 16797574 DOI: 10.1016/j.jcis.2006.05.065] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2006] [Revised: 04/11/2006] [Accepted: 05/28/2006] [Indexed: 11/28/2022]
Abstract
In this work, we report the observation on the self-assembly of beta-CD nanotube induced by 2-phenyl-5-(4-diphenylyl)1,3,4-oxadiazole (PBD) molecule with fluorescence microscopy and transmission electron microscopy (TEM). Micrometer-sized rodlike structure is formed by the secondary assembly of cyclodextrin nanotube driven by the inter-nanotubular hydrogen bonding. The effects of pH value, urea, DMF and NaCl on the formation of the rodlike structure are investigated. Dynamic light scattering (DLS) is applied to further characterize the formation of the PBD-beta-CD nanotube. The effect of light scattering on the measurement of fluorescence anisotropy of PBD in the aqueous solutions of beta-CD is corrected. A new mechanism of cyclodextrin aggregation is proposed for this system.
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Affiliation(s)
- Aihua Wu
- Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China
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17
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Wu A, Chen Q, Xia K, Hou T, Shen X, Gao H, Xu X. Investigation on photophysical properties of a substituted 3H-indole-modified β-cyclodextrin. J Photochem Photobiol A Chem 2006. [DOI: 10.1016/j.jphotochem.2006.02.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Spectrofluorimetric Study of an Inclusion Complex of 2-Hydroxypropyl-β-Cyclodextrin with the Antitumour 11-Methyl Benzophenothiazine. Analytical Application to Urine. J INCL PHENOM MACRO 2006. [DOI: 10.1007/s10847-006-9046-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Wells D, Fong C, Krodkiewska I, Drummond CJ. Nonionic Urea Surfactants: Influence of Hydrocarbon Chain Length and Positional Isomerism on the Thermotropic and Lyotropic Phase Behavior. J Phys Chem B 2006; 110:5112-9. [PMID: 16526754 DOI: 10.1021/jp056583m] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The thermotropic and lyotropic phase behavior of 1- and 5-decyl urea, and 1-, 2-, 4-, and 6-dodecyl urea have been studied. This allowed the effect of positional isomerism to be examined. Intermolecular hydrogen bonding by the urea moiety is the dominant factor in determining the solid-state thermal behavior and crystal solubility boundary of these linear nonionic surfactants. The positional isomers where the urea moiety was not situated at the terminus of the hydrocarbon chain exhibited higher melting points than the 1-alkyl ureas. This has been rationalized by postulating interdigitated chains in the solid state. In the urea surfactant-water systems, three phases are observed, viz. crystalline solid, a dilute aqueous solution of the alkyl urea, and an isotropic liquid. The last two phases coexist in the low-surfactant, high-temperature region of the binary phase diagram. An overview of structure-property correlations for linear nonionic urea surfactants is presented in light of the new physicochemical data obtained for the decyl urea and dodecyl urea positional isomers.
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Affiliation(s)
- Darrell Wells
- CSIRO Molecular and Health Technologies, Bag 10, Clayton South, Victoria 3169 Australia
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20
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Arıkan B, Tunçay M. The effect of SDS micelles on reduction of toluidine blue by ascorbic acid in acid medium. Colloids Surf A Physicochem Eng Asp 2006. [DOI: 10.1016/j.colsurfa.2005.08.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Kumar S, Khan ZA, Parveen N, Kabir-ud-Din. Influence of different ureas on aggregational properties of aqueous surfactant systems. Colloids Surf A Physicochem Eng Asp 2005. [DOI: 10.1016/j.colsurfa.2005.05.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Chakraborty A, Sarkar M, Basak S. Stabilizing effect of low concentrations of urea on reverse micelles. J Colloid Interface Sci 2005; 287:312-7. [PMID: 15914179 DOI: 10.1016/j.jcis.2005.01.071] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2004] [Revised: 12/28/2004] [Accepted: 01/24/2005] [Indexed: 11/18/2022]
Abstract
Urea is a well-known destabilizing agent for biopolymers like proteins and molecular aggregates like micelles and reverse micelles. Several theories have been proposed to explain the destabilizing/denaturing effect of urea. In this work, we present evidence for a stabilizing effect of a low concentration (<1 M) of urea incorporated in the central pool of AOT/n-heptane/water reverse micelles. Static light-scattering experiments were performed to measure (w0)cr--the molar ratio of water to AOT beyond which the micelles become unstable--as a function of the concentration of urea in the central water pool. The stabilizing effect of urea is reflected in an increase in the value of (w0)cr at low urea concentrations over that in the absence of urea. Dynamic light-scattering experiments show that the hydrodynamic radius of the micelles is smaller at low urea concentrations (<1 M) than in the absence of urea. Size-distribution analysis shows that for w0=20 the microemulsion containing 0.5 M urea in its pool is significantly more monodisperse than that containing no urea. Temperature-dependent studies in the range 15-65 degrees C indicate that the magnitude of this stabilizing effect decreases with increasing temperature, vanishing at temperatures higher than 65 degrees C. A model is proposed to explain the above results.
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Affiliation(s)
- Asima Chakraborty
- Chemical Sciences Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India
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23
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Chen Y, Xu T, Shen X, Gao H. Temperature dependence of the inclusion–dissociation behavior of the inclusion complexes between cationic substituted 3H-indoles and β-cyclodextrin. J Photochem Photobiol A Chem 2005. [DOI: 10.1016/j.jphotochem.2005.01.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Studies on the nanotubes formed by 2-phenyl-5-(4-diphenylyl)1,3,4-oxadiazole and cyclodextrins. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)01206-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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25
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Lever M, Randall K, Galinski EA. Near infra-red spectra of urea with glycine betaine or trimethylamine N-oxide are additive. BIOCHIMICA ET BIOPHYSICA ACTA 2001; 1528:135-40. [PMID: 11687300 DOI: 10.1016/s0304-4165(01)00184-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Glycine betaine and trimethylamine-N-oxide counteract urea denaturation in solutions containing urea and the methylamine in the mole ratio of 2:1. Near infra-red difference spectra (water spectrum subtracted) of solutions containing both urea with either glycine betaine or trimethylamine-N-oxide can be predicted from the spectra of the single solutes, with r(2)>0.999 both using the spectrum from 1200 to 2100 nm (where most absorbance is attributable to hydrogen bonding) and using an extended range 1000 to 2500 nm, which includes solute specific bands. Thus urea and the kosmotropes appear to interact with water independently and the counteraction cannot be attributed to specific interactions between them. The spectrum of aqueous glycine betaine can be predicted from tetramethylammonium and formate ions (r(2)=0.998), suggesting that independent interactions of the quaternary amine, and of the carboxyl function, with water are dominant. The exceptional properties of glycine betaine do not arise from specific intramolecular interactions between the charged groups.
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Affiliation(s)
- M Lever
- Biochemistry Unit, Canterbury Health Laboratories, Christchurch, New Zealand.
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26
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Exploring the locations of different groups of a cationic surface-active 3H-indole probe molecule in AOT-based water-in-oil microemulsions. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00640-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Micelle formation and microenvironmental properties of sodium dodecyl sulfate in aqueous urea solutions. Colloids Surf A Physicochem Eng Asp 1999. [DOI: 10.1016/s0927-7757(98)00708-0] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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28
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Interactions between a surface-active cationic 3H-indole molecular probe and β-cyclodextrin. Design of a novel type of rotaxane. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(98)01420-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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29
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Shen X, Belletête M, Durocher G. Study of the interactions between substituted 2,2′-bithiophenes and cyclodextrins. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)01181-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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30
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Soper SA, Warner IM, McGown LB. Molecular Fluorescence, Phosphorescence, and Chemiluminescence Spectrometry. Anal Chem 1998. [DOI: 10.1021/a1980019y] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Steven A. Soper
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, and Department of Chemistry, Duke University, Box 90346, Durham, North Carolina 27708-0346
| | - Isiah M. Warner
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, and Department of Chemistry, Duke University, Box 90346, Durham, North Carolina 27708-0346
| | - Linda B. McGown
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, and Department of Chemistry, Duke University, Box 90346, Durham, North Carolina 27708-0346
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31
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Shen X, Belletête M, Durocher G. Spectral and Photophysical Studies of the 1:3 (Guest/Host) Rotaxane-like Inclusion Complex Formed by a 3H-Indole and β-Cyclodextrin. J Phys Chem B 1998. [DOI: 10.1021/jp9726854] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xinghai Shen
- Département de Chimie, Université de Montréal, C.P. 6128, Succ. A, Montréal, Québec, H3C 3J7, Canada
| | - Michel Belletête
- Département de Chimie, Université de Montréal, C.P. 6128, Succ. A, Montréal, Québec, H3C 3J7, Canada
| | - Gilles Durocher
- Département de Chimie, Université de Montréal, C.P. 6128, Succ. A, Montréal, Québec, H3C 3J7, Canada
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