401
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Amoroso AJ, Edwards PG, Howard ST, Kariuki BM, Knight JC, Ooi L, Malik KMA, Stratford L, Al-Sudani ARH. The synthesis and coordination chemistry of a tris-8-aminoquinoline tripodal ligand. Dalton Trans 2009:8356-62. [DOI: 10.1039/b909122j] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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402
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Ábalos T, Royo S, Martínez-Máñez R, Sancenón F, Soto J, Costero AM, Gil S, Parra M. Surfactant-assisted chromogenic sensing of cyanide in water. NEW J CHEM 2009. [DOI: 10.1039/b909705h] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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403
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Schmittel M, Lin H. Transformation of a Modest Luminescent Chemosensor into a Light-Up Probe: The Overload Displacement Approach. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.1595] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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404
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Chen KH, Liao JH, Chan HY, Fang JM. A Fluorescence Sensor for Detection of Geranyl Pyrophosphate by the Chemo-Ensemble Method. J Org Chem 2008; 74:895-8. [DOI: 10.1021/jo802173b] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kuan-Hung Chen
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | - Jen-Hai Liao
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | - Hsin-Yu Chan
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
| | - Jim-Min Fang
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
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405
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Dynamic proton-induced two-stage emission switching in donor-functionalized bis(dehydrobenzo[n]annuleno)benzenes and 1,2,4,5-tetrakis(phenylethynyl)benzene. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.08.059] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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406
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Calero P, Martínez-Máñez R, Sancenón F, Soto J. Synthesis, Characterisation and Optical Properties of Silica Nanoparticles Coated with Anthracene Fluorophore and Thiourea Hydrogen-Bonding Subunits. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800721] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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407
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A novel, simple, colorimetric receptor based on 2′,4′-dinitrophenylhydrazone for acetate ion in organic medium. J INCL PHENOM MACRO 2008. [DOI: 10.1007/s10847-008-9518-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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408
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Kim IB, Han M, Phillips R, Samanta B, Rotello V, Zhang Z, Bunz U. Nano-Conjugate Fluorescence Probe for the Discrimination of Phosphate and Pyrophosphate. Chemistry 2008; 15:449-56. [DOI: 10.1002/chem.200801403] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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409
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García-Frutos EM, Gómez-Lor B, Monge A, Gutiérrez-Puebla E, Alkorta I, Elguero J. Synthesis and preferred all-syn conformation of C3-symmetrical N-(hetero)arylmethyl triindoles. Chemistry 2008; 14:8555-61. [PMID: 18680132 DOI: 10.1002/chem.200800911] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A new series of C(3)-symmetrical N-(hetero)arylmethyl triindoles has been synthesized in a straightforward procedure. The structure and conformation in the solid state have been determined for three derivatives (3, 4, and 6) by X-ray crystallographic analysis. In all three cases, the molecules adopt a tripodal conformation with all of the flexible arms directed towards the same side, thereby delimiting an inner cavity. Compound 6 crystallizes and forms C(3)-symmetric dimeric cagelike complexes. Guest molecules of chloroform and water are confined within the resulting cavities with stabilization by different intermolecular interactions; this highlights the potential of these compounds in the construction of supramolecular systems. A computational analysis has been performed to predict the most stable conformers. As a general trend, a preference for a conformation with all branches directed to the same side has been predicted. Comparison between theoretical and experimental results indicates that the computational level selected for the present study, B3LYP/6-31G*, is able to reproduce both the minimum energy conformations and the rotation barriers about the N--CH(2) bond.
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Affiliation(s)
- Eva M García-Frutos
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Cantoblanco, Madrid, Spain
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410
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Ros-Lis J, Martínez-Máñez R, Sancenón F, Soto J, Spieles M, Rurack K. Squaraines as Reporter Units: Insights into their Photophysics, Protonation, and Metal-Ion Coordination Behaviour. Chemistry 2008; 14:10101-14. [DOI: 10.1002/chem.200800300] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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411
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Sreejith S, Divya K, Ajayaghosh A. A Near-Infrared Squaraine Dye as a Latent Ratiometric Fluorophore for the Detection of Aminothiol Content in Blood Plasma. Angew Chem Int Ed Engl 2008; 47:7883-7. [DOI: 10.1002/anie.200803194] [Citation(s) in RCA: 249] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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412
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Sreejith S, Divya K, Ajayaghosh A. A Near-Infrared Squaraine Dye as a Latent Ratiometric Fluorophore for the Detection of Aminothiol Content in Blood Plasma. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200803194] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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413
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Tang L, Park J, Kim HJ, Kim Y, Kim SJ, Chin J, Kim KM. Tight Binding and Fluorescent Sensing of Oxalate in Water. J Am Chem Soc 2008; 130:12606-7. [DOI: 10.1021/ja804753n] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lijun Tang
- Bio-Chiral Laboratory, Department of Chemistry and Division of Nano Sciences, Ewha Womans University, Seoul 120-750, South Korea, Department of Chemistry, Kyonggi University, Suwon 443-760, Korea, and Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, M5S-3H6, Canada
| | - Jinhee Park
- Bio-Chiral Laboratory, Department of Chemistry and Division of Nano Sciences, Ewha Womans University, Seoul 120-750, South Korea, Department of Chemistry, Kyonggi University, Suwon 443-760, Korea, and Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, M5S-3H6, Canada
| | - Hae-Jo Kim
- Bio-Chiral Laboratory, Department of Chemistry and Division of Nano Sciences, Ewha Womans University, Seoul 120-750, South Korea, Department of Chemistry, Kyonggi University, Suwon 443-760, Korea, and Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, M5S-3H6, Canada
| | - Youngmee Kim
- Bio-Chiral Laboratory, Department of Chemistry and Division of Nano Sciences, Ewha Womans University, Seoul 120-750, South Korea, Department of Chemistry, Kyonggi University, Suwon 443-760, Korea, and Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, M5S-3H6, Canada
| | - Sung Jin Kim
- Bio-Chiral Laboratory, Department of Chemistry and Division of Nano Sciences, Ewha Womans University, Seoul 120-750, South Korea, Department of Chemistry, Kyonggi University, Suwon 443-760, Korea, and Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, M5S-3H6, Canada
| | - Jik Chin
- Bio-Chiral Laboratory, Department of Chemistry and Division of Nano Sciences, Ewha Womans University, Seoul 120-750, South Korea, Department of Chemistry, Kyonggi University, Suwon 443-760, Korea, and Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, M5S-3H6, Canada
| | - Kwan Mook Kim
- Bio-Chiral Laboratory, Department of Chemistry and Division of Nano Sciences, Ewha Womans University, Seoul 120-750, South Korea, Department of Chemistry, Kyonggi University, Suwon 443-760, Korea, and Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, M5S-3H6, Canada
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414
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Praetorius A, Bailey DM, Schwarzlose T, Nau WM. Design of a Fluorescent Dye for Indicator Displacement from Cucurbiturils: A Macrocycle-Responsive Fluorescent Switch Operating through a pKa Shift. Org Lett 2008; 10:4089-92. [DOI: 10.1021/ol8016275] [Citation(s) in RCA: 154] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Antonia Praetorius
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| | - David M. Bailey
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| | - Thomas Schwarzlose
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
| | - Werner M. Nau
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
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415
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Kaur N, Kumar S. A differential receptor for selective and quantitative multi-ion analysis for Co2+ and Ni2+/Cu2+. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.06.023] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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416
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Oh DJ, Ahn KH. Fluorescent Sensing of IP3 with a Trifurcate Zn(II)-Containing Chemosensing Ensemble System. Org Lett 2008; 10:3539-42. [DOI: 10.1021/ol801290g] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dong Ju Oh
- Department of Chemistry and Center for Integrated Molecular Systems, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Pohang 790-784, Republic of Korea
| | - Kyo Han Ahn
- Department of Chemistry and Center for Integrated Molecular Systems, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong, Pohang 790-784, Republic of Korea
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417
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Gassensmith JJ, Barr L, Baumes JM, Paek A, Nguyen A, Smith BD. Synthesis and photophysical investigation of squaraine rotaxanes by "clicked capping". Org Lett 2008; 10:3343-6. [PMID: 18582079 DOI: 10.1021/ol801189a] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pseudorotaxane complexes of squaraine dyes and tetralactam macrocycles are converted into permanently interlocked rotaxane structures using copper-catalyzed and copper-free cycloaddition reactions with bulky stopper groups. The photophysical properties of the encapsulated squaraine depend on the structure of the macrocycle. In one case, squaraine rotaxanes are produced in near-quantitative yields and with intense near-IR fluorescence. In another case, squaraine fluorescence is greatly diminished upon macrocyclic encapsulation but the signal can be restored by dye displacement with anions.
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Affiliation(s)
- Jeremiah J Gassensmith
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
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418
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Bérubé M, Dowlut M, Hall DG. Benzoboroxoles as Efficient Glycopyranoside-Binding Agents in Physiological Conditions: Structure and Selectivity of Complex Formation. J Org Chem 2008; 73:6471-9. [DOI: 10.1021/jo800788s] [Citation(s) in RCA: 194] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marie Bérubé
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Meenakshi Dowlut
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Dennis G. Hall
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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419
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Baker GA, Desikan R, Thundat T. Label-Free Sugar Detection Using Phenylboronic Acid-Functionalized Piezoresistive Microcantilevers. Anal Chem 2008; 80:4860-5. [DOI: 10.1021/ac702588b] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gary A. Baker
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Biological Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, and Department of Physics, The University of Tennessee, Knoxville, Tennesse 37996
| | - Ramya Desikan
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Biological Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, and Department of Physics, The University of Tennessee, Knoxville, Tennesse 37996
| | - Thomas Thundat
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, Biological Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, and Department of Physics, The University of Tennessee, Knoxville, Tennesse 37996
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420
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Massue J, Quinn SJ, Gunnlaugsson T. Lanthanide Luminescent Displacement Assays: The Sensing of Phosphate Anions Using Eu(III)−Cyclen-Conjugated Gold Nanoparticles in Aqueous Solution. J Am Chem Soc 2008; 130:6900-1. [DOI: 10.1021/ja800361e] [Citation(s) in RCA: 186] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Julien Massue
- School of Chemistry, Center for Synthesis and Chemical Biology, Trinity College Dublin, Dublin 2, Ireland
| | - Susan J. Quinn
- School of Chemistry, Center for Synthesis and Chemical Biology, Trinity College Dublin, Dublin 2, Ireland
| | - Thorfinnur Gunnlaugsson
- School of Chemistry, Center for Synthesis and Chemical Biology, Trinity College Dublin, Dublin 2, Ireland
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421
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422
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Zapata F, Caballero A, Espinosa A, Tárraga A, Molina P. Cation Coordination Induced Modulation of the Anion Sensing Properties of a Ferrocene−Imidazophenanthroline Dyad: Multichannel Recognition from Phosphate-Related to Chloride Anions. J Org Chem 2008; 73:4034-44. [DOI: 10.1021/jo800296c] [Citation(s) in RCA: 156] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fabiola Zapata
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
| | - Antonio Caballero
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
| | - Arturo Espinosa
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
| | - Alberto Tárraga
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
| | - Pedro Molina
- Departamento de Química Orgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, E-30100 Murcia, Spain
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423
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Abstract
Two different coumarin derivatives have been connected via an imine linkage to obtain a new fluorescence signaling system. This compound itself does not show any emission due to rapid isomerization around the C[double bond]N bond. However, in the presence of a Mg(II) ion, this isomerization is stopped because of bonding to the metal ion resulting in high-intensity (approximately 550-fold) emission. Other metal ions like Li(I), Ca(II), and Zn(II) show very little emission, while biologically relevant transition-metal ions do not show any emission. In this way, the Mg(II) ion can be detected in the presence of these ions.
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Affiliation(s)
- Debdas Ray
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
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424
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425
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Discrimination between ω-amino acids with chromogenic acyclic tripodal receptors functionalized with stilbazolium dyes. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.01.076] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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426
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Optimalization of Poly(neutral red) Coated-wire Electrode for Determination of Citrate in Soft Drinks. SENSORS 2008; 8:594-606. [PMID: 27879724 PMCID: PMC3672997 DOI: 10.3390/s8020594] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2007] [Accepted: 01/28/2008] [Indexed: 12/03/2022]
Abstract
This report presents an optimization of potentiometric measurements with citrate-selective electropolymerized poly(neutral red) electrodes. The optimal background electrolyte for these measurements is a TRIS buffer with nitrate at pH 8.5. The electrodes described here exhibit stable and reproducible near-Nernstian response to citrates with a low detection limit of 6 × 10-6 M. Electrodes polymerized from sulfuric acid and acetonitrile are compared in detail. Simple and sensitive method for quantification of citrate in real-life samples by potentiometry with poly(neutral red) electrodes are presented. Data from potentiometric measurements of citrate are compared with capillary electrophoresis.
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427
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Comes M, Marcos MD, Martínez-Máñez R, Sancenón F, Villaescusa LA, Graefe A, Mohr GJ. Hybrid functionalised mesoporous silica–polymer composites for enhanced analyte monitoring using optical sensors. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b810992c] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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428
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Bergen A, Granzhan A, Ihmels H. Water-soluble, pH-sensitive fluorescent probes on the basis of acridizinium ions. Photochem Photobiol Sci 2008; 7:405-7. [DOI: 10.1039/b802018c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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429
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Sai Sathish R, Goutam Raju A, Nageswara Rao G, Janardhana C. A fluorescent fluoride ion probe based on a self-organized ensemble of 5-hydroxyflavone-Al(III) complex. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 69:282-5. [PMID: 17531527 DOI: 10.1016/j.saa.2007.04.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2007] [Revised: 04/13/2007] [Accepted: 04/17/2007] [Indexed: 05/15/2023]
Abstract
In the presence of Al(III) ions, 5-hydroxyflavone (5HF) through a complexation reaction in MeOH, shows dual fluorescence, characterized by a newly developed peak at 554nm upon excitation at 363nm. In this communication, the subsequent ligand exchange reaction of the complex with fluoride ion causing a fluorescence enhancement followed by a decrease in fluorescence intensity involving an intermediate mechanistic pathway, delivering a quantitative estimation route for fluoride ion in the concentration range from 5x10(-5) to 7x10(-4)M, has been reported. The ligand exchange reaction, without interference from other common anions, has been investigated by UV-vis and fluorescence spectroscopies combined with the AM1 semi-empirical self-consistent field quantum chemical calculations within UHF formalism in their ground state.
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Affiliation(s)
- R Sai Sathish
- Department of Chemistry, Sri Sathya Sai University, Prashanthi Nilayam, AP 515134, India
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430
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431
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Comes M, Marcos MD, Martínez-Máñez R, Sancenón F, Soto J, Villaescusa LA, Amorós P. Hybrid materials with nanoscopic anion-binding pockets for the colorimetric sensing of phosphate in water using displacement assays. Chem Commun (Camb) 2008:3639-41. [DOI: 10.1039/b804396e] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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432
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Piña MN, Soberats B, Rotger C, Ballester P, Deyà PM, Costa A. Selective sensing of competitive anions by non-selective hosts: the case of sulfate and phosphate in water. NEW J CHEM 2008. [DOI: 10.1039/b809454c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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433
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El Bakkari M, Luguya R, Correa da Costa R, Vincent JM. A copper(ii)-based multiphasic fluorous colorimetric ethanol assay. NEW J CHEM 2008. [DOI: 10.1039/b716544g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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434
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Gale PA, García-Garrido SE, Garric J. Anion receptors based on organic frameworks: highlights from 2005 and 2006. Chem Soc Rev 2008; 37:151-90. [DOI: 10.1039/b715825d] [Citation(s) in RCA: 715] [Impact Index Per Article: 44.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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435
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Saravanakumar D, Devaraj S, Iyyampillai S, Mohandoss K, Kandaswamy M. Schiff’s base phenol–hydrazone derivatives as colorimetric chemosensors for fluoride ions. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2007.11.006] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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436
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Higashihara G, Inagaki A, Akita M. Syntheses of novel di- and trinucleating ligands having a triethylbenzene core with N,N-bidentate tethers: their complexation toward Pd and Rh organometallic fragments. Dalton Trans 2008:1888-98. [DOI: 10.1039/b713503c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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437
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Lou X, Zhang L, Qin J, Li Z. An alternative approach to develop a highly sensitive and selective chemosensor for the colorimetric sensing of cyanide in water. Chem Commun (Camb) 2008:5848-50. [DOI: 10.1039/b812746h] [Citation(s) in RCA: 204] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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438
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Pei R, Stojanovic MN. Study of thiazole orange in aptamer-based dye-displacement assays. Anal Bioanal Chem 2007; 390:1093-9. [PMID: 18165929 DOI: 10.1007/s00216-007-1773-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2007] [Revised: 11/16/2007] [Accepted: 11/20/2007] [Indexed: 11/24/2022]
Abstract
We screened a series of RNA and DNA aptamers for their ability to serve in the dye displacement assays in which analytes compete with TO dye. We conclude that, while the performance of the TO dye displacement approach is not always predictable, it is still a simple and sensitive assay to detect binding between RNA aptamers and small molecules. In particular, we describe efficient assays for tobramycin and theophylline, with up to 90% displacement of TO observed, and we describe the first aptameric assay for cAMP.
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Affiliation(s)
- Renjun Pei
- Division of Experimental Therapeutics, Department of Medicine, Columbia University, New York, NY 10032, USA.
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439
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Guo L, Wang QL, Jiang QQ, Jiang QJ, Jiang YB. Anion-Triggered Substituent-Dependent Conformational Switching of Salicylanilides. New Hints for Understanding the Inhibitory Mechanism of Salicylanilides. J Org Chem 2007; 72:9947-53. [DOI: 10.1021/jo701823d] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Lin Guo
- Department of Chemistry, College of Chemistry and Chemical Engineering, and The MOE Key Laboratory of Analytical Sciences, Xiamen University, Xiamen 361005, China
| | - Qiang-Li Wang
- Department of Chemistry, College of Chemistry and Chemical Engineering, and The MOE Key Laboratory of Analytical Sciences, Xiamen University, Xiamen 361005, China
| | - Qian-Qian Jiang
- Department of Chemistry, College of Chemistry and Chemical Engineering, and The MOE Key Laboratory of Analytical Sciences, Xiamen University, Xiamen 361005, China
| | - Qiu-Ju Jiang
- Department of Chemistry, College of Chemistry and Chemical Engineering, and The MOE Key Laboratory of Analytical Sciences, Xiamen University, Xiamen 361005, China
| | - Yun-Bao Jiang
- Department of Chemistry, College of Chemistry and Chemical Engineering, and The MOE Key Laboratory of Analytical Sciences, Xiamen University, Xiamen 361005, China
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440
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Morgan BP, He S, Smith RC. Dizinc enzyme model/complexometric indicator pairs in indicator displacement assays for inorganic phosphates under physiological conditions. Inorg Chem 2007; 46:9262-6. [PMID: 17915862 DOI: 10.1021/ic701374h] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A dizinc phosphohydrolase enzyme model complex employing the dinucleating ligand 2,6-bis-[(bis-pyridin-2-ylmethyl-amino)methyl]-4-methylphenol (L1) was tested for binding to a series of 11 commercially available complexometric indicators in aqueous N-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid (HEPES) buffer at pH 7.4, with the aim of determining the applicability of these indicators in indicator displacement assays (IDAs) under physiological conditions. Dissociation constants (Kd) were determined for 11 indicator-Zn2L1 complexes, spanning 2 orders of magnitude from 2.8 x 10(-4) M (alizarin red S) to 2.7 x 10(-6) M (bromo pyrogallol red). Phosphate and pyrophosphate were tested for their ability to displace bound indicator and produce a detectable colorimetric response. Three indicators (bromo pyrogallol red, mordant blue 9, and zincon) complex to Zn2L1 to form an indicator displacement assay selective for pyrophosphate over phosphate. Because selection of an indicator/analyte pair having appropriate relative Kd values is critical for their successful application in IDAs, the binding data for these 11 indicators should assist their extension to IDAs for other analytes.
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Affiliation(s)
- Brad P Morgan
- Department of Chemistry and Center for Optical Materials Science and Engineering Technologies, Clemson University, Clemson, SC 29634, USA
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441
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Hariharan M, Neelakandan PP, Ramaiah D. Encapsulation of Electron Donor−Acceptor Dyads in β-Cyclodextrin Cavity: Unusual Planarization and Enhancement in Rate of Electron-Transfer Reaction. J Phys Chem B 2007; 111:11940-7. [PMID: 17892280 DOI: 10.1021/jp074643d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Interaction of beta-cyclodextrin (beta-CD) with a few novel electron donor acceptor dyads 1a-c and 2a-c, having aryl and flexible methylene spacer groups, has been investigated through photophysical, chiroptical, electrochemical, NMR, and microscopic techniques. Dyads 1a and 1c, with p-tolyl and biphenyl spacer groups, respectively, exhibited significantly decreased fluorescence quantum yields and lifetimes in the presence of beta-CD, while negligible changes were observed for dyad 1b with an o-tolyl spacer. In contrast, spacer-length-dependent significant enhancement in fluorescence quantum yields and lifetimes was observed for dyads 2a-c, with flexible polymethylene (n = 1, 3, 11) spacer groups. Association constants of beta-CD encapsulated complexes have been determined and the contrast behavior observed in these systems is explained through an electron transfer (kET) mechanism based on calculated favorable change in free energy (DeltaGET = -1.27 eV) and the redox species characterized through laser flash photolysis studies. Rates of kET have been estimated and are found to increase ca. 2-fold in the case of dyads 1a and 1c when encapsulated in beta-CD, while significantly decreased kET values were observed for the dyads 2a-c with flexible spacer (ca. 9-fold for 2c). As characterized through cyclic voltammetry, 2D NMR [correlated (COSY) and nuclear Overhauser enhancement (NOESY) spectroscopy], and laser flash photolysis studies, the beta-CD encapsulation of dyads with aliphatic spacer groups leads to the conformational unfolding of a sandwich type of structure, whereas dyads with rigid aryl spacer groups undergo unusual planarization as compared to the uncomplexed dyads, resulting in enhanced electron-transfer reaction between the donor and acceptor moieties.
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Affiliation(s)
- Mahesh Hariharan
- Photosciences and Photonics, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Trivandrum, India
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442
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Nau WM, Hennig A, Koner AL. Squeezing Fluorescent Dyes into Nanoscale Containers—The Supramolecular Approach to Radiative Decay Engineering. ACTA ACUST UNITED AC 2007. [DOI: 10.1007/4243_2007_007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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443
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Nayak MK, Seo J, Park S, Park SY. Colorimetric and highly selective “turn-on” fluorescent anion chemosensors with excited state proton transfer. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2007.04.028] [Citation(s) in RCA: 7] [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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444
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Dennis AE, Smith RC. "Turn-on" fluorescent sensor for the selective detection of zinc ion by a sterically-encumbered bipyridyl-based receptor. Chem Commun (Camb) 2007:4641-3. [PMID: 17989818 DOI: 10.1039/b710740d] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sterically-encumbered 5,5'-distyryl-2,2'-bipyridyl derivative that enforces a 1:1 metal-to-ligand ratio acts as a selective turn-on sensor for Zn(2+) in THF.
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Affiliation(s)
- Ashlyn E Dennis
- Department of Chemistry and Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Clemson, SC 29634, USA
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445
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Ariga K, Vinu A, Miyahara M, Hill JP, Mori T. One-Pot Separation of Tea Components through Selective Adsorption on Pore-Engineered Nanocarbon, Carbon Nanocage. J Am Chem Soc 2007; 129:11022-3. [PMID: 17713913 DOI: 10.1021/ja074870t] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Katsuhiko Ariga
- National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan.
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446
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Affiliation(s)
- Jong Seung Kim
- Department of Chemistry, Korea University, Seoul 136-701, Korea.
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447
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Sandanaraj BS, Demont R, Aathimanikandan SV, Savariar EN, Thayumanavan S. Selective sensing of metalloproteins from nonselective binding using a fluorogenic amphiphilic polymer. J Am Chem Soc 2007; 128:10686-7. [PMID: 16910656 PMCID: PMC2515928 DOI: 10.1021/ja063544v] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nonconjugated fluorogenic amphiphilic polymers containing an anthracene chromophore exhibit fluorescence quenching in the presence of metalloproteins, although the binding of the polymer to proteins is not selective. The reason for this difference is that the possible conformational changes that protein binding could bring about on a polymer do not affect the fluorescence properties of a pendent chromophore in nonconjugated polymers. This is in contrast to the nonspecific binding and response found with conjugated polymers to proteins.
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Affiliation(s)
- Britto S Sandanaraj
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, USA
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448
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Affiliation(s)
- Dong Ju Oh
- a Department of Chemistry and Center for Integrated Molecular Systems , POSTECH , San 31 Hyoja-dong, Pohang, 790-784, Republic of Korea
| | - Min Su Han
- b Department of Chemistry , Chung-ang University, Seoul, 156-756, Republic of Korea
| | - Kyo Han Ahn
- a Department of Chemistry and Center for Integrated Molecular Systems , POSTECH , San 31 Hyoja-dong, Pohang, 790-784, Republic of Korea
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449
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Abstract
Nature's use of sensor arrays in the mammalian olfactory and gustatory systems has encouraged supramolecular chemists to take a new approach to molecular recognition. Pattern-based recognition involves the use of sensor arrays to create fingerprints for analytes. The use of sensing arrays has paved the way for systems capable of identifying biological analytes that would have been difficult targets using the traditional "lock-and-key" approach to sensor design.
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Affiliation(s)
- Byron E Collins
- Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, USA
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450
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Neelakandan PP, Hariharan M, Ramaiah D. A supramolecular ON-OFF-ON fluorescence assay for selective recognition of GTP. J Am Chem Soc 2007; 128:11334-5. [PMID: 16939239 DOI: 10.1021/ja062651m] [Citation(s) in RCA: 168] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
With the objective of developing small molecule based receptors for nucleosides and nucleotides, interactions of a cyclic donor-acceptor conjugate 1 with adenosine, AMP, ADP, CTP, UTP, ITP, ATP, and GTP have been investigated by absorption, steady-state, and time-resolved fluorescence, cyclic voltammetry (CV), NMR, and fluorescence indicator displacement techniques. Titration of 1 with the fluorescent indicator, 8-hydroxy-1,3,6-pyrene trisulfonate (HPTS), resulted in nearly complete fluorescence quenching of HPTS, along with 25% hypochromicity in its absorption spectrum. Benesi-Hildebrand analysis gave a 1:1 stoichiometry for the complex between the receptor 1 and HPTS with an association constant (Kass) of 4.66 x 104 M-1 in buffer. The driving force for such a complexation was evaluated to be the synergistic effects of pi-stacking and electrostatic interactions inside the cavity as confirmed by the effect of ionic strength, temperature, and the negative results obtained with the model compound 2. Titration of the nonfluorescent complex [1.HPTS] with various nucleosides and nucleotides resulted in revival of fluorescence of the indicator, HPTS. It was observed that GTP induces maximum displacement of HPTS from the complex [1.HPTS] with an overall fluorescence enhancement of ca. 150-fold. The addition of adenosine, AMP, ADP, CTP, and UTP showed negligible changes, whereas ca. 45- and 50-fold enhancement was observed with ATP and ITP, respectively. The competitive displacement of the indicator by various analytes is found to be in the order GTP (buffer) approximately GTP (biofluid) > ITP approximately ATP > UTP > CTP approximately ADP approximately AMP approximately Ade. By virtue of having a better pi-electron cloud, GTP undergoes effective electronic, pi-stacking, and electrostatic interactions inside the cavity and forms a stable complex with the receptor 1. The uniqueness of this assay is that it differentiates GTP from ATP and other nucleotides and signals the event through a visual "turn on" fluorescence mechanism in buffer as well as in biological fluids.
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Affiliation(s)
- Prakash P Neelakandan
- Photosciences and Photonics, Regional Research Laboratory (CSIR), Trivandrum 695019, India
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