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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Stîngă G, Băran A, Iovescu A, Brânzoi F, Anghel DF. Impact of cationic surfactant on fluorescent complex of pyrene labeled poly(acrylic acid) and methylene blue. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114545] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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3
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Rakshit S, Das S, Poonia P, Maini R, Kumar A, Datta A. White Light Generation from a Self-Assembled Fluorogen–Surfactant Composite Light Harvesting Platform. J Phys Chem B 2020; 124:7484-7493. [DOI: 10.1021/acs.jpcb.0c02373] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Soumyadipta Rakshit
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sharmistha Das
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Priyanka Poonia
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Ratika Maini
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Anil Kumar
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Anindya Datta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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4
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Xing Y, Li D, Dong B, Wang X, Wu C, Ding L, Zhou S, Fan J, Song B. Water-soluble and highly emissive near-infrared nano-probes by co-assembly of ionic amphiphiles: towards application in cell imaging. NEW J CHEM 2019. [DOI: 10.1039/c9nj01184f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Highly emissive near-infrared nano-emitters formed by co-assembly of ionic amphiphiles were applicable in cell imaging.
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Affiliation(s)
- Yuzhi Xing
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Dahua Li
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Bin Dong
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Xiaocheng Wang
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Chengfeng Wu
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Lan Ding
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Shixin Zhou
- Department of Cell Biology
- School of Basic Medical Science
- Peking University Health Science Center
- Beijing 100191
- China
| | - Jian Fan
- Jiangsu Key Laboratory For Carbon-Based Functional Materials & Devices Science
- Soochow University
- Suzhou 215123
- China
| | - Bo Song
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
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5
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White LJ, Tyuleva SN, Wilson B, Shepherd HJ, Ng KKL, Holder SJ, Clark ER, Hiscock JR. Towards the Prediction of Global Solution State Properties for Hydrogen Bonded, Self-Associating Amphiphiles. Chemistry 2018; 24:7761-7773. [PMID: 29633393 PMCID: PMC6055828 DOI: 10.1002/chem.201801280] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Indexed: 12/20/2022]
Abstract
Through this extensive structure-property study we show that critical micelle concentration correlates with self-associative hydrogen bond complex formation constant, when combined with outputs from low level, widely accessible, computational models. Herein, we bring together a series of 39 structurally related molecules related by stepwise variation of a hydrogen bond donor-acceptor amphiphilic salt. The self-associative and corresponding global properties for this family of compounds have been studied in the gas, solid and solution states. Within the solution state, we have shown the type of self-associated structure present to be solvent dependent. In DMSO, this class of compound show a preference for hydrogen bonded dimer formation, however moving into aqueous solutions the same compounds are found to form larger self-associated aggregates. This observation has allowed us the unique opportunity to investigate and begin to predict self-association events at both the molecular and extended aggregate level.
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Affiliation(s)
- Lisa J. White
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Stilyana N. Tyuleva
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Ben Wilson
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Helena J. Shepherd
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Kendrick K. L. Ng
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Simon J. Holder
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Ewan R. Clark
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Jennifer R. Hiscock
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
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6
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White LJ, Wells NJ, Blackholly LR, Shepherd HJ, Wilson B, Bustone GP, Runacres TJ, Hiscock JR. Towards quantifying the role of hydrogen bonding within amphiphile self-association and resultant aggregate formation. Chem Sci 2017; 8:7620-7630. [PMID: 29568426 PMCID: PMC5848798 DOI: 10.1039/c7sc03888g] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 09/21/2017] [Indexed: 11/30/2022] Open
Abstract
The role of hydrogen bonding within aggregate formation and CMC: can these properties be predicted by low level computational modelling?
Herein, we present a series of five tetrabutylammonium (TBA) sulfonate–urea amphiphilic salts. In solution these amphiphilic salts have been shown to form a variety of self-associated species. The proportion and type of which are both solvent and concentration dependent. In DMSO-d6 a variety of NMR experiments provide evidence towards the formation of mainly dimeric over larger aggregate species. Increasing the percentage of water was shown to increase the concentration of the larger aggregates over dimers in solution. A correlation was established between critical micelle concentration (CMC) values obtained in a 1 : 19 EtOH : H2O mixture, dimeric self-association constants obtained in a DMSO-d6 – 0.5% H2O and the results of simple semi-empirical PM6 computational modelling methods. This approach begins to quantify the role of hydrogen bonding in amphiphile self-association and the effects it imparts on surfactant properties. This consequently provides preliminary evidence that these properties maybe predicted by simple low level computational modelling techniques.
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Affiliation(s)
- L J White
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
| | - N J Wells
- School of Chemistry , University of Southampton , Southampton , SO17 1BJ , UK
| | - L R Blackholly
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
| | - H J Shepherd
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
| | - B Wilson
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
| | - G P Bustone
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
| | - T J Runacres
- School of Biosciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK
| | - J R Hiscock
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
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7
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Mudliar NH, Pettiwala AM, Awasthi AA, Singh PK. On the Molecular Form of Amyloid Marker, Auramine O, in Human Insulin Fibrils. J Phys Chem B 2016; 120:12474-12485. [PMID: 27973839 DOI: 10.1021/acs.jpcb.6b10078] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Designing extrinsic fluorescence sensors for amyloid fibrils is a very active and important area of research. Recently, an ultrafast molecule rotor dye, Auramine O (AuO), has been projected as a fluorescent amyloid marker. It has been claimed that AuO scores better than the most extensively utilized gold-standard amyloid probe, Thioflavin-T (ThT). This advantage arises from the fact that AuO, in addition to its usual emission band (∼500 nm), also displays a large red-shifted emission band (∼560 nm), exclusively in the presence of human insulin fibril medium and not in the native protein or buffer media. On the contrary, for ThT, the emission maximum (∼490 nm) largely remains unchanged while going from protein to fibril. This otherwise unknown large red-shifted emission band of AuO, observed in the presence of human insulin fibrils, was tentatively attributed to a species formed upon fast proton dissociation from excited AuO. It was proposed that because of the long excited-state lifetime (∼1.8 ns) of AuO upon association with human insulin fibrils, this fast proton dissociation from excited AuO could be observed, which is otherwise not observed in buffer or native protein media, owing to its very short excited-state lifetime (∼1 ps). Herein, we show that despite the long excited-state lifetime of AuO in other fibrillar media (human serum albumin and lysozyme), the new red-shifted emission band at 560 nm is not observed, thus possibly suggesting a different origin of the red-shifted emission band of AuO in human insulin fibril medium. We convincingly show that this red-shifted band of AuO (∼560 nm) could be observed under conditions that promote dye aggregation, such as a premicellar concentration of surfactants and polyelectrolytes. These AuO aggregates display strong emission wavelength dependence of transient decay traces, similar to that for AuO in human insulin fibril medium. Detailed time-resolved emission spectral (TRES) measurements suggest that the AuO/premicellar surfactant and AuO/human insulin fibril system share similar features, such as a dynamic red-shift in TRES and an isoemissive point in the time-resolved area-normalized emission spectra, suggesting that the characteristic red-shifted emission band of AuO in human insulin fibril medium may arise from AuO aggregates.
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Affiliation(s)
- Niyati H Mudliar
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre , Mumbai 400 085, India
| | - Aafrin M Pettiwala
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre , Mumbai 400 085, India
| | - Ankur A Awasthi
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre , Mumbai 400 085, India
| | - Prabhat K Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre , Mumbai 400 085, India
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8
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Jiang G, Wang J, Yang Y, Zhang G, Liu Y, Lin H, Zhang G, Li Y, Fan X. Fluorescent turn-on sensing of bacterial lipopolysaccharide in artificial urine sample with sensitivity down to nanomolar by tetraphenylethylene based aggregation induced emission molecule. Biosens Bioelectron 2016; 85:62-67. [DOI: 10.1016/j.bios.2016.04.071] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/16/2016] [Accepted: 04/21/2016] [Indexed: 10/21/2022]
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9
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Zhan C, You X, Zhang G, Zhang D. Bio-/Chemosensors and Imaging with Aggregation-Induced Emission Luminogens. CHEM REC 2016; 16:2142-60. [DOI: 10.1002/tcr.201600045] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Chi Zhan
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids; Institute of Chemistry Chinese Academy of Sciences; Beijing 100190 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Xue You
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids; Institute of Chemistry Chinese Academy of Sciences; Beijing 100190 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Guanxin Zhang
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids; Institute of Chemistry Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Deqing Zhang
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids; Institute of Chemistry Chinese Academy of Sciences; Beijing 100190 P. R. China
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10
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Zhang G, Hu F, Zhang D. Manipulation of the aggregation and deaggregation of tetraphenylethylene and silole fluorophores by amphiphiles: emission modulation and sensing applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:4593-4604. [PMID: 25331184 DOI: 10.1021/la5029367] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this Feature Article, we have summarized the recent advances in the fluorescence modulation of tetraphenylethylene and silole fluorophores by manipulating the respective aggregation/deaggregation with amphiphiles. These include (i) the assembly of neutral tetraphenylethylene analogues with the aid of an ionic amphiphile, (ii) the aggregation of ionic tetraphenylethylene and silole induced by amphiphiles, and (iii) bio/chemosensors based on the aggregation/deaggregation of AIE fluorophores tuned by ionic amphiphiles.
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Affiliation(s)
- Guanxin Zhang
- Beijing National Laboratory for Molecular Sciences, Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Fang Hu
- Beijing National Laboratory for Molecular Sciences, Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Deqing Zhang
- Beijing National Laboratory for Molecular Sciences, Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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11
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Liu S, Zhao L, Yan Y, Huang J. One platform solid multicolour emission of terthiophene compounds controlled by mixed self-assembly. SOFT MATTER 2015; 11:2752-2757. [PMID: 25697130 DOI: 10.1039/c4sm02554g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Via the mixed self-assembling procedure, solid multicolour emission materials based on an amphiphilic terthiophene compound are obtained from a unimolecular platform. Upon controlling the concentration of the cationic surfactant dodecyltriethyl ammonium bromide (DEAB) in the precipitate-monomer equilibrium system of the terthiophene compound TTC4L, mixed self-assembly of TTC4L-DEAB results in diverse structures (including plates, spheres, and needles) with different emission colours. The multicolour emissions are triggered by the different distances between the terthiophene groups in these mixed self-assemblies. Each distance corresponds to a specific molecular state of terthiophene groups, so that emissions corresponding to the monomers, excimers, and aggregates are obtained. Upon variation of the ratio of DEAB and TTC4L, the relative fraction of emissions corresponding to the monomers, excimers, and aggregates of TTC4L changes. This approach may act as a simple method to control the stacking mode of the oligothiophene group which is anticipated to realize unimolecular-platform multicolour emissions.
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Affiliation(s)
- Shuai Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
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12
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Xia Y, Dong L, Jin Y, Wang S, Yan L, Yin S, Zhou S, Song B. Water-soluble nano-fluorogens fabricated by self-assembly of bolaamphiphiles bearing AIE moieties: towards application in cell imaging. J Mater Chem B 2015; 3:491-497. [DOI: 10.1039/c4tb01546k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water-soluble nano-fluorogens with AIE properties are fabricated by self-assembly of a bolaamphiphile, and successfully applied in cell imaging.
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Affiliation(s)
- Yijun Xia
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Lin Dong
- College of Material Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310036
- China
| | - Yingzhi Jin
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Shuai Wang
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Li Yan
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
| | - Shouchun Yin
- College of Material Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310036
- China
| | - Shixin Zhou
- Department of Cell Biology
- School of Basic Medicine
- Peking University Health Science Center
- Beijing 100191
- China
| | - Bo Song
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
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13
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Lewkowicz A, Synak A, Grobelna B, Kułak L, Bojarski P. Spectroscopic properties of Rhodamine B entrapped in hybrid porous nanolayers at high dye concentration. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.05.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Tezcan F, Uzaşçı S, Uyar G, Oztekin N, Erim FB. Determination of amino acids in pomegranate juices and fingerprint for adulteration with apple juices. Food Chem 2013; 141:1187-91. [PMID: 23790902 DOI: 10.1016/j.foodchem.2013.04.017] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Revised: 01/23/2013] [Accepted: 04/04/2013] [Indexed: 11/30/2022]
Abstract
A new chiral micellar electrokinetic chromatography-laser induced fluorescence (MEKC-LIF) method was developed using sodium dodecylbenzene sulphonate (SDBS) as surfactant for the determination of chiral amino acids in pomegranate juices. The use of SDBS as the micellar medium enhanced the fluorescence intensities of amino acids derivatised with fluorescein isothiocyanate (FITC). The amino acid profile of pomegranate juices was compared to apple amino acids and l-Asn was proposed as a marker for the adulteration of pomegranate juices with apple juices.
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Affiliation(s)
- Filiz Tezcan
- Istanbul Technical University, Department of Chemistry, Maslak, Istanbul, Turkey
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15
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Li Y, Guo Y, Xu G, Wang Z, Bao M, Sun N. Dissipative particle dynamics simulation on the properties of the oil/water/surfactant system in the absence and presence of polymer. MOLECULAR SIMULATION 2013. [DOI: 10.1080/08927022.2012.724173] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Gu X, Yao J, Zhang G, Zhang D. Controllable self-assembly of di(p-methoxylphenyl)dibenzofulvene into three different emission forms. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:3406-3411. [PMID: 22887870 DOI: 10.1002/smll.201201334] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Indexed: 06/01/2023]
Abstract
Self-assembly of di(p-methoxylphenyl)dibenzofulvene in the absence and presence of CTAB (cetyl trimethylammonium bromide) leads to three emission forms: strongly yellow-green- and blue-emissive crystalline forms (as microrods), and weakly orange-emissive amorphous form. Each of these three emission forms can be prepared by adjusting the concentration of CTAB.
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Affiliation(s)
- Xinggui Gu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; Graduate School of Chinese Academy of Sciences, Beijing 100049, PR China
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Paineau E, Dozov I, Bihannic I, Baravian C, Krapf MEM, Philippe AM, Rouzière S, Michot LJ, Davidson P. Tailoring highly oriented and micropatterned clay/polymer nanocomposites by applying an a.c. electric field. ACS APPLIED MATERIALS & INTERFACES 2012; 4:4296-4301. [PMID: 22833688 DOI: 10.1021/am300980r] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Clay/polymer nanocomposites have recently raised much interest because of their widespread industrial applications. Nevertheless, controlling both clay platelet exfoliation and orientation during polymerization still remains challenging. Herein, we report the elaboration of clay/polymer nanocomposite hydrogels from aqueous suspensions of natural swelling clays submitted to high-frequency a.c. electric fields. X-ray scattering experiments have confirmed the complete exfoliation of the clay sheets in the polymer matrix, even after polymerization. Moreover, polarized light microscopy shows that the clay platelets were perfectly oriented by the electric field and that this field-induced alignment was frozen in by in situ photopolymerization. This procedure allowed us to not only produce uniformly aligned samples but also pattern platelet orientation, at length scales down to 20 μm. This straightforward and cheap nanocomposite patterning technique can be easily extended to a wide range of natural or synthetic inorganic anisotropic particles.
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Affiliation(s)
- Erwan Paineau
- Laboratoire de Physique des Solides, UMR 8502, Paris-Sud University, Bâtiment 510, 91405 Orsay Cedex, France.
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18
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Zhang Y, Li S, Wang R, Chen L, Xu C. Synthesis of Functionalized 2,3,4,5-Tetraphenylsilole Derivatives Through Hydrosilylation and Their Crystal Structures. SYNTHETIC COMMUN 2012. [DOI: 10.1080/00397911.2011.555049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Yunsheng Zhang
- a Institute of Chemistry , Chinese Academy of Sciences , Beijing , China
- b Graduate University of Chinese Academy of Sciences , Beijing , China
| | - Shuhong Li
- c School of Chemical and Environmental Engineering , Beijing Technology and Business University , Beijing , China
| | - Rui Wang
- a Institute of Chemistry , Chinese Academy of Sciences , Beijing , China
- b Graduate University of Chinese Academy of Sciences , Beijing , China
| | - Limin Chen
- a Institute of Chemistry , Chinese Academy of Sciences , Beijing , China
| | - Caihong Xu
- a Institute of Chemistry , Chinese Academy of Sciences , Beijing , China
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19
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Investigation of interfacial and structural properties of CTAB at the oil/water interface using dissipative particle dynamics simulations. J Colloid Interface Sci 2011; 361:573-80. [DOI: 10.1016/j.jcis.2011.05.078] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Revised: 05/25/2011] [Accepted: 05/26/2011] [Indexed: 11/21/2022]
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20
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Choi JK, Jang S, Kim KJ, Sohn H, Jeong HD. Observation of Negative Charge Trapping and Investigation of Its Physicochemical Origin in Newly Synthesized Poly(tetraphenyl)silole Siloxane Thin Films. J Am Chem Soc 2011; 133:7764-85. [DOI: 10.1021/ja1108112] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jin-Kyu Choi
- Department of Chemistry, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Seunghyun Jang
- Department of Chemistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Ki-Jeong Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
| | - Honglae Sohn
- Department of Chemistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Hyun-Dam Jeong
- Department of Chemistry, Chonnam National University, Gwangju 500-757, Republic of Korea
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21
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Polat BE, Lin S, Mendenhall JD, VanVeller B, Langer R, Blankschtein D. Experimental and molecular dynamics investigation into the amphiphilic nature of sulforhodamine B. J Phys Chem B 2011; 115:1394-402. [PMID: 21222449 PMCID: PMC3037431 DOI: 10.1021/jp109866q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Sulforhodamine B (SRB), a common fluorescent dye, is often considered to be a purely hydrophilic molecule, having no impact on bulk or interfacial properties of aqueous solutions. This assumption is due to the high water solubility of SRB relative to most fluorescent probes. However, in the present study, we demonstrate that SRB is in fact an amphiphile, with the ability to adsorb at an air/water interface and to incorporate into sodium dodecyl sulfate (SDS) micelles. In fact, SRB reduces the surface tension of water by up to 23 mN/m, and the addition of SRB to an aqueous SDS solution induces a significant decrease in the cmc of SDS. Molecular dynamics simulations were conducted to gain a deeper understanding of these findings. The simulations revealed that SRB has defined polar "head" and nonpolar "tail" regions when adsorbed at the air/water interface as a monomer. In contrast, when incorporated into SDS micelles, only the sulfonate groups were found to be highly hydrated, suggesting that the majority of the SRB molecule penetrates into the micelle. To illustrate the implications of the amphiphilic nature of SRB, an interesting case study involving the effect of SRB on ultrasound-mediated transdermal drug delivery is presented.
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Affiliation(s)
- Baris E. Polat
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Shangchao Lin
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jonathan D. Mendenhall
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Brett VanVeller
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Robert Langer
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Daniel Blankschtein
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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