201
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Gao W, Yan M, Ge S, Liu X, Yu J. Fluorescent sensor based on a novel conjugated polyfluorene derivative. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 95:218-223. [PMID: 22634413 DOI: 10.1016/j.saa.2012.04.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Revised: 03/23/2012] [Accepted: 04/07/2012] [Indexed: 06/01/2023]
Abstract
A novel water-soluble polyfluorene derivative, poly[(9,9-bis(3'-((N,N-dimethylamino)N-ethylammonium)propyl)-2,7-fluorene)-alt-2,7-(9,9-p-divinylbenzene)]dibromide (P-2) was synthesized by the palladium-catalyzed Suzuki coupling reaction and it's quaternized ammonium polyelectrolyte derivatives was obtained through a postpolymerization treatment on the terminal amino groups. The electrochemical and optical properties of the copolymers was fully investigated. The results showed that the new polyfluorene derivative had high electronic conductivity and strong fluorescence, therefore it had good potential to be used in chemical and biological sensors, as shown in optical sensing of bovine albumin (BSA) in this study.
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Affiliation(s)
- Weiqiang Gao
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
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202
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Evans RC, Knaapila M, Willis-Fox N, Kraft M, Terry A, Burrows HD, Scherf U. Cationic polythiophene-surfactant self-assembly complexes: phase transitions, optical response, and sensing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:12348-12356. [PMID: 22839776 DOI: 10.1021/la302166a] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The absorption and photoluminescence spectra of the cationic conjugated polyelectrolyte poly[3-(6-trimethylammoniumhexyl)thiophene] (P3TMAHT) were observed to be dramatically altered in the presence of anionic surfactants due to self-assembly through ionic complex formation. Small-angle neutron scattering (SANS), UV/vis, and photoluminescence spectroscopy were used to probe the relationship between the supramolecular complex organization and the photophysical response of P3TMAHT in the presence of industrially important anionic surfactants. Subtle differences in the surfactant mole fraction and chemical structure (e.g., chain length, headgroup charge density, perfluorination) result in marked variations in the range and type of complexes formed, which can be directly correlated to a unique colorimetric and fluorimetric fingerprint. Our results show that P3TMAHT has potential as an optical sensor for anionic surfactants capable of selectively identifying distinct structural subgroups through dual mode detection.
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Affiliation(s)
- Rachel C Evans
- School of Chemistry, Trinity College Dublin, Dublin 2, Ireland.
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203
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Husson J, Knorr M. 2,2′:6′,2″-Terpyridines Functionalized with Thienyl Substituents: Synthesis and Applications. J Heterocycl Chem 2012. [DOI: 10.1002/jhet.813] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jérôme Husson
- Institut UTINAM UMR CNRS 6213; Université de Franche-Comté, Faculté des Sciences et des Techniques; 16 Route de Gray 25030 Besançon France
| | - Michael Knorr
- Institut UTINAM UMR CNRS 6213; Université de Franche-Comté, Faculté des Sciences et des Techniques; 16 Route de Gray 25030 Besançon France
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204
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Bonifazi D, Carloni LE, Corvaglia V, Delforge A. Peptide nucleic acids in materials science. ARTIFICIAL DNA, PNA & XNA 2012; 3:112-22. [PMID: 22925824 PMCID: PMC3581510 DOI: 10.4161/adna.21941] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This review highlights the recent methods to prepare PNA-based materials through a combination of self-assembly and self-organization processes. The use of these methods allows easy and versatile preparation of structured hybrid materials showing specific recognition properties and unique physicochemical properties at the nano- and micro-scale levels displaying potential applications in several directions, ranging from sensors and microarrays to nanostructured devices for biochips.
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Affiliation(s)
- Davide Bonifazi
- Namur Research College, Department of Chemistry, University of Namur, Namur, Belgium.
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205
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Wu D, Feng F, Xie D, Chen Y, Tan W, Schanze KS. Helical Conjugated Polyelectrolyte Aggregation Induced by Biotin-Avidin Interaction. J Phys Chem Lett 2012; 3:1711-5. [PMID: 26285733 DOI: 10.1021/jz300452t] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Fluorescence correlation spectroscopy (FCS) is applied to demonstrate avidin-induced cross-linking in a system consisting of a helical anionic conjugated polyelectrolyte (P1) and a biotin-tetramethylrhodamine (TMR) conjugate (2). In a previous study, we used fluorescence spectroscopy to demonstrate that 2 binds to P1 via intercalation of the TMR chromophore into the P1 helix. Addition of avidin to the P1/2 complex induces little change in the fluorescence of the system; however, FCS reveals a remarkable increase in the diffusion time of the P1/2 complex in the presence of avidin. This change is attributed to supramolecular polymer aggregates produced by cross-link formation between the biotin unit of intercalated 2 and avidin. Atomic force microscopy imaging provides evidence supporting the existence of these aggregates. The highly sensitive FCS method is used to develop a novel sensor for the biotin-avidin interaction, with a detection limit of <100 pM for avidin.
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Affiliation(s)
- Danlu Wu
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Fude Feng
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Dongping Xie
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Yan Chen
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Weihong Tan
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Kirk S Schanze
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
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206
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Prakash S, Pinti M, Bhushan B. Theory, fabrication and applications of microfluidic and nanofluidic biosensors. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2012; 370:2269-2303. [PMID: 22509059 DOI: 10.1098/rsta.2011.0498] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Biosensors are a broad array of devices that detect the type and amount of a biological species or biomolecule. Several different types of biosensors have been developed that rely on changes to mechanical, chemical or electrical properties of the transduction or sensing element to induce a measurable signal. Often, a biosensor will integrate several functions or unit operations such as sample extraction, manipulation and detection on a single platform. This review begins with an overview of the current state-of-the-art biosensor field. Next, the review delves into a special class of biosensors that rely on microfluidics and nanofluidics by presenting the underlying theory, fabrication and several examples and applications of microfluidic and nanofluidic sensors.
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Affiliation(s)
- Shaurya Prakash
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, 43210, USA.
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207
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A unique, two-component sensing system for fluorescence detection of glucose and other carbohydrates. PURE APPL CHEM 2012. [DOI: 10.1351/pac-con-11-10-36] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In our glucose-sensing system, a boronic acid-modified viologen molecule quenches the fluorescence of a separate dye molecule. When glucose or other monosaccharides are added and bind to the boronic acid, the quenching ability of the viologen is diminished and fluorescence increases. Thus, changes in the fluorescence of the dye can be correlated with changing glucose concentration. Quenching and sugar-sensing results are explained by an electrostatic interaction between dye and quencher. This modular system can be configured in a nearly unlimited number of ways through substitution and multiplexing of the two fundamental quencher and dye components. Significantly, fluorescent quantum dots (QDs) can also be used as the reporter component. The system can also be immobilized in a hydrogel polymer to provide real-time, reversible sugar sensing.
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208
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Wang H, Peng Z, Long Y, Chen H, Yang Y, Li N, Liu F. A simple and reusable fluorescent sensor for heme proteins based on a conjugated polymer-doped electrospun nanofibrous membrane. Talanta 2012; 94:216-22. [DOI: 10.1016/j.talanta.2012.03.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Accepted: 03/17/2012] [Indexed: 11/29/2022]
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209
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He Y, Zhang X, Zhang S, Kris MKL, Man FC, Liu G. Visual detection of single-base mismatches in DNA using hairpin oligonucleotide with double-target DNA binding sequences and gold nanoparticles. Biosens Bioelectron 2012; 34:37-43. [PMID: 22386491 PMCID: PMC4110906 DOI: 10.1016/j.bios.2011.12.055] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 12/24/2011] [Accepted: 12/28/2011] [Indexed: 10/14/2022]
Abstract
We describe a hairpin oligonucleotide (HO) with double-target DNA binding sequences in the loop and 11-base in the stem for visual detection of single-base mismatches (SBM) in DNA with highly specificity. The thiol-modified HO was immobilized on gold nanoparticle (Au-NP) surface through a self-assembling process. The strategy of detecting SBM depends on the unique molecular recognition properties of HO to the perfect-matched DNA and SBM to generate different quantities of duplex DNA on the Au-NP surface, which are captured on the test zone of lateral flow test strip via the DNA hybridization reaction between the duplex DNA and preimmobilized DNA probe. Accumulation of Au-NPs produces the characteristic red bands, enabling visual detection of SBM. It was found that the ability of HO to differentiate perfect-matched DNA and SBM was increased dramatically by incorporating double-target DNA binding sequences in the loop of HO. The signal ratio between perfect-matched DNA and SBM was up to 28, which is much higher than that of conventional HO or molecular beacon. The approach was applied to detect the mutation sites, Arg142Cys and Gly529Ile, of transglutaminase 1 gene in autosomal recessive congenital ichthyosis. The results presented here show that the new HO is a potential molecular recognition probe for the future development of nucleic acid-based biosensors and bioassays. The approach can be used for point-of-care diagnosis of genetic diseases and detecting infectious agents or warning against bio-warfare agents.
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Affiliation(s)
- Yuqing He
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou 510095, PR China
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND, 58105
| | - Xibao Zhang
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou 510095, PR China
| | - Sanquan Zhang
- Department of Dermatology, Guangzhou Institute of Dermatology, Guangzhou 510095, PR China
| | - Mak Ka Long Kris
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hongkong
| | - Fong Chi Man
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hongkong
| | - Guodong Liu
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND, 58105
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210
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Ghosh D, Nandi N, Chattopadhyay N. Differential Förster Resonance Energy Transfer from the Excimers of Poly(N-vinylcarbazole) to Coumarin 153. J Phys Chem B 2012; 116:4693-701. [DOI: 10.1021/jp300727e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Debanjana Ghosh
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Nilashis Nandi
- Department of Chemistry, University of Kalyani, Kalyani 741 235, West Bengal,
India
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211
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Fan H, Jiang X, Zhang T, Jin Q. Peptide-induced fluorescence quenching of conjugated polyelectrolyte for label-free, ultrasensitive and selective assay of protease activity. Biosens Bioelectron 2012; 34:221-6. [DOI: 10.1016/j.bios.2012.02.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 02/04/2012] [Accepted: 02/06/2012] [Indexed: 11/15/2022]
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212
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Ghosh D, Chattopadhyay N. Hyper-efficient quenching of non-conjugated pendant polymer by silver nanoparticles: A demonstration and versatile mechanistic proposition. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.02.057] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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213
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Affiliation(s)
- Yin Nah Teo
- Department of Chemistry, Stanford University, California 94305, United States
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214
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Sun J, Cai M, Lavigne JJ. Supramolecular Chemistry in In VitroBiosensors. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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215
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Franco IE, Lorchat P, Lamps JP, Schmutz M, Schröder A, Catala JM, Combet J, Schosseler F. From chain collapse to new structures: spectroscopic properties of poly(3-thiophene acetic acid) upon binding by alkyl trimethylammonium bromide surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:4815-4828. [PMID: 22332777 DOI: 10.1021/la204862u] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The binding of cationic surfactants with varying alkyl chain length to a regiorandom conjugated polyanion, poly(3-thiophene acetic acid) (PTAA), is studied in an aqueous buffer by using absorption and emission spectroscopies, photon correlation spectroscopy, isothermal titration calorimetry, and cryogenic transmission electron microscopy. We study the mixed solutions as a function of composition ratio R of surfactant molecules to monomer units molar concentrations, at low polymer concentration and in a very wide composition range (10(-6) < R < 10(2)) below the critical micellar concentration. Upon surfactant binding, the molecularly dispersed chains first collapse progressively and then form new structures as the mixed aggregates get enriched in surfactant. The collapse leads to a strong decrease of the conjugation length and to a blue shift of the absorption spectra by 30 to 50 nm. The new structures are responsible for a new intense emission band at about 600 nm, red-shifted by nearly 130 nm from the initial emission maximum of the polymer (~472 nm). As the surfactant tail becomes shorter, the blue shift of the absorption spectra and the intensity raise of the new emission are delayed to larger composition ratios while their variations become smoother functions of the surfactant concentration. These particular spectroscopic properties of PTAA seem related to its unique combination of a strongly hydrophobic backbone, a large ratio of contour length to persistence length, and an overall good aqueous solubility. Our results show that such features are well suited to design a colorimetric biosensor at small composition ratio, and a fluorescent biomarker at large composition ratio.
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Affiliation(s)
- I Echavarri Franco
- Institut Charles Sadron, CNRS-University of Strasbourg, Strasbourg, France
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216
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Sun Y, Chen Z, Puodziukynaite E, Jenkins DM, Reynolds JR, Schanze KS. Light Harvesting Arrays of Polypyridine Ruthenium(II) Chromophores Prepared by Reversible Addition–Fragmentation Chain Transfer Polymerization. Macromolecules 2012. [DOI: 10.1021/ma202804u] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yali Sun
- Department of Chemistry and Center
for Macromolecular
Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Zhuo Chen
- Department of Chemistry and Center
for Macromolecular
Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Egle Puodziukynaite
- Department of Chemistry and Center
for Macromolecular
Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Dustin M. Jenkins
- Department of Chemistry and Center
for Macromolecular
Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - John R. Reynolds
- Department of Chemistry and Center
for Macromolecular
Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Kirk S. Schanze
- Department of Chemistry and Center
for Macromolecular
Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
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217
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Chen Z, Fimmel B, Würthner F. Solvent and substituent effects on aggregation constants of perylene bisimide π-stacks--a linear free energy relationship analysis. Org Biomol Chem 2012; 10:5845-55. [PMID: 22391667 DOI: 10.1039/c2ob07131b] [Citation(s) in RCA: 149] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of six perylene bisimides (PBIs) with hydrophilic and hydrophobic side chains at the imide nitrogens were applied for a comparative study of the solvent and structural effects on the aggregation behaviour of this class of dyes. A comparison of the binding constants in tetrachloromethane at room temperature revealed the highest binding constant of about 10(5) M(-1) for a PBI bearing 3,4,5-tridodecyloxyphenyl substituents at the imide nitrogens, followed by 3,4,5-tridodecylphenyl and alkyl-substituted PBIs, whereas no aggregation could be observed in the accessible concentration range for PBIs equipped with bulky 2,6-diisopropylphenyl substituents at the imide nitrogens. The aggregation behaviour of three properly soluble compounds was investigated in 17 different solvents covering a broad polarity range from nonpolar n-hexane to highly polar DMSO and water. Linear free energy relationships (LFER) revealed a biphasic behaviour between Gibbs free energies of aggregation and common empirical solvent polarity scales indicating particularly strong π-π stacking interactions in nonpolar aliphatic and polar alcoholic solvents whilst the weakest binding is observed in dichloromethane and chloroform. Accordingly, PBI aggregation is dominated by electrostatic interactions in nonpolar solvents and by solvophobic interactions in protic solvents. In water, the aggregation constant is increased far beyond LFER expectations pointing at a pronounced hydrophobic effect.
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Affiliation(s)
- Zhijian Chen
- Universität Würzburg, Institut für Organische Chemie and Center for Nanosystems Chemistry, Am Hubland, 97074 Würzburg, Germany
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218
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Kent CA, Liu D, Meyer TJ, Lin W. Amplified Luminescence Quenching of Phosphorescent Metal–Organic Frameworks. J Am Chem Soc 2012; 134:3991-4. [DOI: 10.1021/ja211271m] [Citation(s) in RCA: 195] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Caleb A. Kent
- Department of Chemistry,
CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599,
United States
| | - Demin Liu
- Department of Chemistry,
CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599,
United States
| | - Thomas J. Meyer
- Department of Chemistry,
CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599,
United States
| | - Wenbin Lin
- Department of Chemistry,
CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599,
United States
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219
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Deng Q, Li Y, Wu J, Liu Y, Fang G, Wang S, Zhang Y. Highly sensitive fluorescent sensing for water based on poly(m-aminobenzoic acid). Chem Commun (Camb) 2012; 48:3009-11. [PMID: 22327772 DOI: 10.1039/c2cc17856g] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorescent conjugated polymer, poly(3-aminobenzoic acid), as a new class of fluorescence sensor for detection of trace amounts of water in organic solvents was developed. This sensor exhibits extraordinarily high sensitivity with a detection limit as low as 0.008 wt% for water in DMF.
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Affiliation(s)
- Qiliang Deng
- Department of Science, Tianjin University of Science and Technology, Tianjin, 300457, P. R. China.
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220
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Wu X, Xu B, Tong H, Wang L. Meta-linked and para-linked water-soluble poly(arylene ethynylene)s with amino acid side chains: Effects of different linkage on Hg2+ ion sensing properties in aqueous media. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.25914] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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221
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Yum K, Ahn JH, McNicholas TP, Barone PW, Mu B, Kim JH, Jain RM, Strano MS. Boronic acid library for selective, reversible near-infrared fluorescence quenching of surfactant suspended single-walled carbon nanotubes in response to glucose. ACS NANO 2012; 6:819-830. [PMID: 22133474 DOI: 10.1021/nn204323f] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We describe the high-throughput screening of a library of 30 boronic acid derivatives to form complexes with sodium cholate suspended single-walled carbon nanotubes (SWNTs) to screen for their ability to reversibly report glucose binding via a change in SWNT fluorescence. The screening identifies 4-cyanophenylboronic acid which uniquely causes a reversible wavelength red shift in SWNT emission. The results also identify 4-chlorophenylboronic acid which demonstrates a turn-on fluorescence response when complexed with SWNTs upon glucose binding in the physiological range of glucose concentration. The mechanism of fluorescence modulation in both of these cases is revealed to be a photoinduced excited-state electron transfer that can be disrupted by boronate ion formation upon glucose binding. The results allow for the elucidation of design rules for such sensors, as we find that glucose recognition and transduction is enabled by para-substituted, electron-withdrawing phenyl boronic acids that are sufficiently hydrophobic to adsorb to the nanotube surface.
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Affiliation(s)
- Kyungsuk Yum
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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222
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Colak DG, Cianga I, Demirkol DO, Kozgus O, Medine EI, Sakarya S, Unak P, Timur S, Yagci Y. The synthesis and targeting of PPP-type copolymers to breast cancer cells: Multifunctional platforms for imaging and diagnosis. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30692a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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223
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Jagtap SP, Collard DM. 2D Multilayered π-stacked conjugated polymers based on a U-turn pseudo-geminal [2.2]paracyclophane scaffold. Polym Chem 2012. [DOI: 10.1039/c2py00473a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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224
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Wang J, Guo W, Bae JH, Kim SH, Song J, Ha CS. Facile preparation of a multifunctional fluorescent nanosensor for chemical and biological applications. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm33103a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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225
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Maggini L, Bonifazi D. Hierarchised luminescent organic architectures: design, synthesis, self-assembly, self-organisation and functions. Chem Soc Rev 2012; 41:211-41. [DOI: 10.1039/c1cs15031f] [Citation(s) in RCA: 240] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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226
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Han F, Lu Y, Zhang Q, Sun J, Zeng X, Li C. Homogeneous and sensitive DNA detection based on polyelectrolyte complexes of cationic conjugated poly(pyridinium salt)s and DNA. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15491a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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227
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Kopeć M, Kruk T, Zapotoczny S, Laschewsky A, Holdcroft S, Mac M, Nowakowska M. Photoinduced electron transfer in multilayer films composed of conjugated polyelectrolyte and amphiphilic copolymer hosting electron acceptor molecules. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm13785a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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228
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Wang X, He F, Tang F, Li L. Optically amplified DNA detection on self-assembled solid films using conjugated polyelectrolytes. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32534a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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229
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Deng H, Zhu B, Song L, Tu C, Qiu F, Shi Y, Wang D, Zhu L, Zhu X. Effect of branching architecture on the optical properties of polyazomethines. Polym Chem 2012. [DOI: 10.1039/c1py00486g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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230
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Feng PL, Leong K, Allendorf MD. Charge-transfer guest interactions in luminescent MOFs: implications for solid-state temperature and environmental sensing. Dalton Trans 2012; 41:8869-77. [DOI: 10.1039/c2dt30649b] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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231
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Sirilaksanapong S, Sukwattanasinitt M, Rashatasakhon P. 1,3,5-Triphenylbenzene fluorophore as a selective Cu2+sensor in aqueous media. Chem Commun (Camb) 2012; 48:293-5. [DOI: 10.1039/c1cc16148b] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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232
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Shen X, Li L, Wu H, Yao SQ, Xu QH. Photosensitizer-doped conjugated polymer nanoparticles for simultaneous two-photon imaging and two-photon photodynamic therapy in living cells. NANOSCALE 2011; 3:5140-5146. [PMID: 22038039 DOI: 10.1039/c1nr11104c] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Photosensitizer doped conjugated polymer nanoparticles have been prepared by incorporating polyoxyethylene nonylphenylether (CO-520) into the nanoparticles using a re-precipitation method. The conjugated polymer, poly[9,9-dibromohexylfluorene-2,7-ylenethylene-alt-1,4-(2,5-dimethoxy)phenylene] (PFEMO), was used as the host matrix to disperse tetraphenylporphyrin (TPP) and an energy donor to enhance the two-photon excitation properties of TPP. These CO-520 incorporated, TPP-doped PFEMO nanoparticles are stable and have low cytotoxicity in the dark. The TPP emission of the nanoparticles was found to be enhanced by about 20 times by PFEMO under two-photon excitation. The nanoparticles showed significantly enhanced two-photon excitation singlet oxygen generation efficiency and two-photon photodynamic therapy activity in cancer cells. These composite nanoparticles display features required for ideal photosensitizers, such as low cytotoxicity in the dark and efficient two-photon photodynamic activity under laser radiation. In addition, these novel nano-photosensitizers allow simultaneous in vivo monitoring by two-photon fluorescence imaging during two-photon photodynamic treatment. These photosensitizer-doped conjugated polymer nanoparticles can act as novel photosensitizing agents for two-photon photodynamic therapy and related applications.
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Affiliation(s)
- Xiaoqin Shen
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
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233
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Brasch M, Cornelissen JJLM. Relative size selection of a conjugated polyelectrolyte in virus-like protein structures. Chem Commun (Camb) 2011; 48:1446-8. [PMID: 22121498 DOI: 10.1039/c1cc13185k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A conjugated polyelectrolyte poly[(2-methoxy-5-propyloxy sulfonate)-phenyl-ene vinylene] (MPS-PPV) drives the assembly of virus capsid proteins to form single virus-like particles (VLPs) and aggregates with more than two VLPs, with a relative selection of high molecular weight polymer in the latter.
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Affiliation(s)
- Melanie Brasch
- Laboratory for Biomolecular Nanotechnology, MESA+ Institute, University of Twente, PO Box 207, 7500 AE Enschede, The Netherlands
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234
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Lee CS, Chang HH, Jung J, Lee NA, Song NW, Chung BH. A novel fluorescent nanoparticle composed of fluorene copolymer core and silica shell with enhanced photostability. Colloids Surf B Biointerfaces 2011; 91:219-25. [PMID: 22138116 DOI: 10.1016/j.colsurfb.2011.11.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 11/03/2011] [Accepted: 11/03/2011] [Indexed: 10/15/2022]
Abstract
A variety of fluorescent nanoparticles have been developed for demanding applications such as optical biosensing and fluorescence imaging in live cells. Silica-based fluorescent nanoparticles offer diverse advantages for biological applications. For example, they can be used as labeling probes due to their low toxicity, high sensitivity, resolution, and stability. In this research, a new class of highly fluorescent, efficient nanoparticles composed of a newly synthesized poly[di(2-methoxy-5-(2-ethylhexyloxy))-2,7-(9,9-dioctyl-9H-fluorene)] (PDDF) core and a silica shell (designated as PDDF@SiO(2)) were prepared using a simple reverse micelle method, and their fluorescent properties were evaluated using methods such as single-dot photoluminescence measurements. The enhanced photostability of the particles and their potential applications for bioanalysis are discussed in this article. The morphology, size, and fluorescent properties for prepared PDDF@SiO(2) nanoparticles were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM) and photoluminescence spectroscopy. The prepared particles size, which was approximately 60 nm, resulted in an excellent colloidal stability in a physiological environment. The photobleaching dynamics, total numbers of emitted photons (TNEP) and statistical measurements of individual nanoparticles were observed using laser scanning fluorescence microscopy to assess the structure and photostability of PDDF@SiO(2) nanoparticles. Additionally, PDDF@SiO(2) nanoparticles were used in cell toxicity and permeation tests for biological analyses, demonstrating a great potential for use as powerful, novel materials within the emerging fields of biosensing and biomedical engineering.
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Affiliation(s)
- Chang-Soo Lee
- Bionanotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon, Republic of Korea
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235
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Habuchi S, Fujita H, Michinobu T, Vacha M. Twist Angle Plays an Important Role in Photophysical Properties of a Donor–Acceptor-Type Conjugated Polymer: A Combined Ensemble and Single-Molecule Study. J Phys Chem B 2011; 115:14404-15. [DOI: 10.1021/jp209405k] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Satoshi Habuchi
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Hiroyuki Fujita
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Tsuyoshi Michinobu
- Global Edge Institute, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Martin Vacha
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
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236
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Rostami A, Taylor MS. Polymers for Anion Recognition and Sensing. Macromol Rapid Commun 2011; 33:21-34. [DOI: 10.1002/marc.201100528] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 09/12/2011] [Indexed: 01/25/2023]
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237
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Chung CYS, Yam VWW. Induced Self-Assembly and Förster Resonance Energy Transfer Studies of Alkynylplatinum(II) Terpyridine Complex Through Interaction With Water-Soluble Poly(phenylene ethynylene sulfonate) and the Proof-of-Principle Demonstration of this Two-Component Ensemble for Selective Label-Free Detection of Human Serum Albumin. J Am Chem Soc 2011; 133:18775-84. [DOI: 10.1021/ja205996e] [Citation(s) in RCA: 135] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Clive Yik-Sham Chung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
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238
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Ng BC, Chan ST, Lin J, Tolbert SH. Using polymer conformation to control architecture in semiconducting polymer/viral capsid assemblies. ACS NANO 2011; 5:7730-8. [PMID: 21942298 PMCID: PMC3215919 DOI: 10.1021/nn202493w] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Cowpea chlorotic mottle virus is a single-stranded RNA plant virus with a diameter of 28 nm. The proteins comprising the capsid of this virus can be purified and reassembled either by themselves to form hollow structures or with polyanions such as double-stranded DNA or single-stranded RNA. Depending on pH and ionic strength, a diverse range of structures and shapes can form. The work presented here focuses on using these proteins to encapsulate a fluorescent polyanionic semiconducting polymer, MPS-PPV (poly-2-methoxy-5-propyloxy sulfonate phenylene vinlyene), in order to obtain optically active virus-like particles. After encapsulation, fluorescence from MPS-PPV shows two distinct peaks, which suggests the polymer may be in two conformations. A combination of TEM, fluorescence anisotropy, and sucrose gradient separation indicate that the blue peak arises from polymer encapsulated into spherical particles, while the redder peak corresponds to polymers contained in rod-like cages. Ionic strength during assembly can be used to tune the propensity to form rods or spheres. The results illustrate the synergy of hybrid synthetic/biological systems: polymer conformation drives the structure of this composite material, which in turn modifies the polymer optical properties. This synergy could be useful for the future development of synthetic/biological hybrid materials with designated functionality.
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Affiliation(s)
- Benny C. Ng
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, CA 90095-1569, USA
- California NanoSystems Institute, UCLA, Los Angeles, CA 90095-7227, USA
| | - Stephanie T. Chan
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, CA 90095-1569, USA
| | - Jason Lin
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, CA 90095-1569, USA
| | - Sarah H. Tolbert
- Department of Chemistry and Biochemistry, UCLA, Los Angeles, CA 90095-1569, USA
- California NanoSystems Institute, UCLA, Los Angeles, CA 90095-7227, USA
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239
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Xie D, Parthasarathy A, Schanze KS. Aggregation-induced amplified quenching in conjugated polyelectrolytes with interrupted conjugation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:11732-11736. [PMID: 21861519 DOI: 10.1021/la202122p] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A pair of anionic conjugated polyelectrolytes that contain three-ring (phenylene ethynylene) units linked by a single -CH(2)- or -O- tether (P1 and P2, respectively) are studied. The linkers serve to interrupt the π conjugation along the polymer backbone. Fluorescence spectroscopy reveals that P2 forms a fluorescent aggregate in methanol and water; however, the fluorescence of P1 is much weaker in water, and P1 exhibits only weak aggregate fluorescence. Fluorescence quenching of the polymers was examined using methyl viologen (MV(2+)) as a cationic quencher. P1 shows only a weak amplified quenching effect, with a Stern-Volmer quenching constant of K(SV) ≈ 6 × 10(5) M(-1) in methanol. Interestingly, for P2 in methanol, the aggregate emission is strongly quenched with K(SV) ≈ 5 × 10(6) M(-1), which is comparable to the highest quenching efficiency observed for fully π-conjugated polyelectrolytes. By contrast, the monomer emission is quenched much less efficiently, with K(SV) ≈ 2 × 10(5) M(-1). The results are explained by a model in which -O- linked polymer P2 is able to fold into a helical conformation in solution, which facilitates the formation of extended π-stacked aggregates allowing long-distance exciton transport.
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Affiliation(s)
- Dongping Xie
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, USA
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240
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Song Y, Wei W, Qu X. Colorimetric biosensing using smart materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:4215-36. [PMID: 21800383 DOI: 10.1002/adma.201101853] [Citation(s) in RCA: 431] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Indexed: 05/20/2023]
Abstract
In recent years, colorimetric biosensing has attracted much attention because of its low cost, simplicity, and practicality. Since color changes can be read out by the naked eye, colorimetric biosensing does not require expensive or sophisticated instrumentation and may be applied to field analysis and point-of-care diagnosis. For transformation of the detection events into color changes, a number of smart materials have been developed, including gold nanoparticles, magnetic nanoparticles, cerium oxide nanoparticles, carbon nanotubes, graphene oxide, and conjugated polymers. Here, we focus on recent developments in colorimetric biosensing using these smart materials. Along with introducing the mechanisms of color changes based on different smart materials, we concentrate on the design of biosensing assays and their potential applications in biomedical diagnosis and environmental monitoring.
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Affiliation(s)
- Yujun Song
- Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Laboratory of Chemical Biology, Changchun, Jilin 130022, China
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241
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Chen S, Zhang Q, Liu Q, Gu J, Zhang L, Zhou J, Fan X, Fang L. Optical bandgaps and fluorescence resonance energy transfer studies of a series of poly(phenyleneethynylene) derivatives. REACT FUNCT POLYM 2011. [DOI: 10.1016/j.reactfunctpolym.2011.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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242
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Zhang W, Zhu L, Qin J, Yang C. Novel Water-Soluble Red-Emitting Poly(p-phenylenevinylene) Derivative: Synthesis, Characterization, and Fluorescent Acetylcholinesterase Assays. J Phys Chem B 2011; 115:12059-64. [DOI: 10.1021/jp206930v] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wenjun Zhang
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People's Republic of China
| | - Linna Zhu
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People's Republic of China
| | - Jingui Qin
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People's Republic of China
| | - Chuluo Yang
- Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, People's Republic of China
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243
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Khalil GE, Adawi AM, Robinson B, Cadby AJ, Tsoi W, Kim JS, Charas A, Morgado J, Lidzey DG. Spectroscopy and Single-Molecule Emission of a Fluorene-Terthiophene Oligomer. J Phys Chem B 2011; 115:12028-35. [DOI: 10.1021/jp206368g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- G. E. Khalil
- Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, United Kingdom
- National Institute of Laser Enhanced Science (NILES), Cairo University, Cairo, Egypt
| | - A. M. Adawi
- Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, United Kingdom
| | - B. Robinson
- Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, United Kingdom
| | - A. J. Cadby
- Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, United Kingdom
| | - W.C. Tsoi
- The Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2BZ, United Kingdom
| | - J-S. Kim
- The Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2BZ, United Kingdom
| | - A. Charas
- Instituto de Telecomunicações, Av. Rovisco Pais, P-1049-001 Lisboa, Portugal
| | - J. Morgado
- Instituto de Telecomunicações, Av. Rovisco Pais, P-1049-001 Lisboa, Portugal
| | - D. G. Lidzey
- Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, United Kingdom
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244
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Ji E, Corbitt TS, Parthasarathy A, Schanze KS, Whitten DG. Light and dark-activated biocidal activity of conjugated polyelectrolytes. ACS APPLIED MATERIALS & INTERFACES 2011; 3:2820-2829. [PMID: 21755955 DOI: 10.1021/am200644g] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This Spotlight on Applications provides an overview of a research program that has focused on the development and mechanistic study of cationic conjugated polyelectrolytes (CPEs) that function as light- and dark-active biocidal agents. Investigation has centered on poly-(phenylene ethynylene) (PPE) type conjugated polymers that are functionalized with cationic quaternary ammonium solubilizing groups. These polymers are found to interact strongly with Gram-positive and Gram-negative bacteria, and upon illumination with near-UV and visible light act to rapidly kill the bacteria. Mechanistic studies suggest that the cationic PPE-type polymers efficiently sensitize singlet oxygen ((1)O(2)), and this cytotoxic agent is responsible for initiating the sequence of events that lead to light-activated bacterial killing. Specific CPEs also exhibit dark-active antimicrobial activity, and this is believed to arise due to interactions between the cationic/lipophilic polymers and the negatively charged outer membrane characteristic of Gram-negative bacteria. Specific results are shown where a cationic CPE with a degree of polymerization of 49 exhibits pronounced light-activated killing of E. coli when present in the cell suspension at a concentration of 1 μg mL(-1).
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Affiliation(s)
- Eunkyung Ji
- Department of Chemical and Nuclear Engineering and Center for Biomedical Engineering, University of New Mexico, Albuquerque, New Mexico 87131-1341, United States
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245
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Matsushita S, Akagi K. Synthesis of Conjugated Polymers in Chiral Nematic Liquid Crystal Fields. Isr J Chem 2011. [DOI: 10.1002/ijch.201100029] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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246
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Going Beyond Continuous Glucose Monitoring with Boronic Acid-Appended Bipyridinium Salts. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/978-1-4419-9672-5_7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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247
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Lee SH, Kömürlü S, Zhao X, Jiang H, Moriena G, Kleiman VD, Schanze KS. Water-Soluble Conjugated Polyelectrolytes with Branched Polyionic Side Chains. Macromolecules 2011. [DOI: 10.1021/ma200574d] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Seoung Ho Lee
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Sevnur Kömürlü
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Xiaoyong Zhao
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Hui Jiang
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Gustavo Moriena
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Valeria D. Kleiman
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Kirk S. Schanze
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
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248
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Dong S, Ou D, Qin J, Li Z. New imidazole-functionalized polyfluorene derivatives: convenient postfunctional syntheses, sensitive probes for metal ions and cyanide, and adjustable output signals with diversified fluorescence color. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24768] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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249
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Davis BW, Niamnont N, Dillon R, Bardeen CJ, Sukwattanasinitt M, Cheng Q. FRET detection of proteins using fluorescently doped electrospun nanofibers and pattern recognition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:6401-8. [PMID: 21491867 DOI: 10.1021/la2006925] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
This paper reports the fabrication of solid-state nanofiber sensor arrays and their use for detection of multiple proteins using principal component analysis (PCA). Four cationic and anionic fluorescently embedded nanofibers are generated by an electrospinning method, yielding unique patterns of fluorescence change upon interaction with protein samples. Five metal and nonmetal containing proteins, i.e., hemoglobin, myoglobin, cytochrome c, BSA, and avidin, have been investigated; and the results show that distinct fluorescent patterns can be formed upon the addition of protein samples to the array of solid nanofiber substrates, allowing their unambiguous identification. The nanofiber films are highly repeatable with a batch-to-batch variation of approximately 5% and demonstrated outstanding reusability with less than a 15% loss of fluorescence intensity signal after 5 regenerations of test cycles. For a more practical visualization, a cluster map was generated using PCA of the change-in-fluorescence (ΔI) composite patterns, demonstrating the potential of the method for diagnostic applications.
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Affiliation(s)
- Bryce W Davis
- Department of Chemistry, University of California, Riverside, California 92521, United States
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250
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Davies ML, Douglas P, Burrows HD, da Graça Miguel M, Douglas A. Effect of Aggregation on the Photophysical Properties of Three Fluorene–Phenylene-Based Cationic Conjugated Polyelectrolytes. J Phys Chem B 2011; 115:6885-92. [DOI: 10.1021/jp202446a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthew L. Davies
- Chemistry Group, School of Engineering, Swansea University, Singleton Park Swansea, SA2 8PP, U.K
- Departamento de Química da Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal
| | - Peter Douglas
- Chemistry Group, School of Engineering, Swansea University, Singleton Park Swansea, SA2 8PP, U.K
| | - Hugh D. Burrows
- Departamento de Química da Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal
| | - Maria da Graça Miguel
- Departamento de Química da Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal
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