All Outputs (417)

Thiacalix[4]arene derivatives bearing imidazole units : a ditopic hard/soft receptor for Na⁺ and K⁺/Ag⁺ with an allosteric effect and a reusable extractant for dichromate anions (2016)
Journal Article
Zhao, J.-L., Wu, C., Zeng, X., Rahman, S., Georghiou, P. E., Elsegood, M. R., Warwick, T. G., Redshaw, C., Teat, S. J., & Yamato, T. (2016). Thiacalix[4]arene derivatives bearing imidazole units : a ditopic hard/soft receptor for Na⁺ and K⁺/Ag⁺ with an allosteric effect and a reusable extractant for dichromate anions. ChemistrySelect, 1(8), 1541-1547. https://doi.org/10.1002/slct.201600245

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Two novel receptors 5,11,17,23-tetra-tert-butyl-25,27-bis[(ethoxycarbonyl)methoxy]-26,28-bis-[1-methyl-(imidazole)meth-oxy] -2,8,14,20-tetra-thiacalix[4]arene (L1) and 5,11,17,23-tetra-tert-butyl-25... Read More about Thiacalix[4]arene derivatives bearing imidazole units : a ditopic hard/soft receptor for Na⁺ and K⁺/Ag⁺ with an allosteric effect and a reusable extractant for dichromate anions.

Interaction of a symmetrical α,α',δ,δ'-Tetramethyl-cucurbit[6]uril with Ln³⁺ : potential applications for isolation of lanthanides (2016)
Journal Article
Yang, B., Gao, Z.-Z., Lu, J.-H., Zhu, Q.-J., Xue, S.-F., Tao, Z., Prior, T. J., Redshaw, C., Wei, G., & Xiao, X. (2016). Interaction of a symmetrical α,α',δ,δ'-Tetramethyl-cucurbit[6]uril with Ln³⁺ : potential applications for isolation of lanthanides. CrystEngComm RSC, 18(26), 5028-5035. https://doi.org/10.1039/c6ce00134c

The interaction of a symmetrical α,α′,δ,δ′-tetramethyl-cucurbit[6]uril (TMeQ[6]) with a series of lanthanide cations (Ln³⁺) was investigated in neutral water and in acidic solution. Analysis by single crystal X-ray diffraction revealed that different... Read More about Interaction of a symmetrical α,α',δ,δ'-Tetramethyl-cucurbit[6]uril with Ln³⁺ : potential applications for isolation of lanthanides.

Demethylation of 5,n-di-tert-butyl-8,n-dimethoxy[2.n] metacyclophane-1-ynes with BBr3 to afford novel [n] benzofuranophanes (2016)
Journal Article
Akther, T., Islam, M. M., Matsumoto, T., Tanaka, J., Feng, X., Redshaw, C., & Yamato, T. (2016). Demethylation of 5,n-di-tert-butyl-8,n-dimethoxy[2.n] metacyclophane-1-ynes with BBr3 to afford novel [n] benzofuranophanes. Journal of molecular structure, 1122(15 October), 247-255. https://doi.org/10.1016/j.molstruc.2016.05.054

© 2016 Elsevier B.V. All rights reserved. Novel [n]benzofuranophanes (n = 8 & 10) 2a-b have been prepared by successive intramolecular cyclization from 5,19-di-tert-butyl-8,22-dimethoxy[n]metacyclophane-1-yne (syn-1a-b) by treatment with BBr 3 in C... Read More about Demethylation of 5,n-di-tert-butyl-8,n-dimethoxy[2.n] metacyclophane-1-ynes with BBr3 to afford novel [n] benzofuranophanes.

Synthesis, structural properties, electrophilic substitution reactions and DFT computational studies of calix[3]benzofurans (2016)
Journal Article
Islam, M. M., Akther, T., Ikejiri, Y., Matsumoto, T., Tanaka, J., Rahman, S., Georghiou, P. E., Hughes, D. L., Redshaw, C., & Yamato, T. (in press). Synthesis, structural properties, electrophilic substitution reactions and DFT computational studies of calix[3]benzofurans. RSC advances, 6(56), 50808-50817. https://doi.org/10.1039/c6ra06219a

Calix[3]benzofurans have been synthesized by a modified TosMIC coupling reaction, followed by acid treatment and an intramolecular cyclization reaction with TMSI (trimethylsilyl iodide); X-ray analysis established the structures of two samples, both... Read More about Synthesis, structural properties, electrophilic substitution reactions and DFT computational studies of calix[3]benzofurans.

Metallocalixarene catalysts: α-olefin polymerization and ROP of cyclic esters (2016)
Journal Article
Redshaw, C. (2016). Metallocalixarene catalysts: α-olefin polymerization and ROP of cyclic esters. Dalton Transactions : an international journal of inorganic chemistry, 45(22), 9018-9030. https://doi.org/10.1039/c6dt01529h

This perspective review discusses metallocalix[n]arene complexes that have been employed in either α-olefin polymerization or in the ring opening polymerization (ROP) of cyclic esters over the last 5 years. Synthesis, molecular structure and catalyti... Read More about Metallocalixarene catalysts: α-olefin polymerization and ROP of cyclic esters.

Synthesis and structures of O-anthrylmethyl-substituted hexahomotrioxacalix[3]arenes (2016)
Journal Article
Jiang, X.-K., Ikejiri, Y., Ni, X.-L., Zeng, X., Redshaw, C., & Yamato, T. (2016). Synthesis and structures of O-anthrylmethyl-substituted hexahomotrioxacalix[3]arenes. Journal of molecular structure, 1120, 274-280. https://doi.org/10.1016/j.molstruc.2016.05.020

O-Alkylation of 7,15,23-tri-tert-butyl-25,26,27-trihydroxy-2,3,10,11,18,19-hexahomo-3,11,19-trioxacalix[3]arene (1H₃) with 9-chloromethylanthracene 5 was carried out under different reaction conditions. Variation of the number of anthrylmethyl group... Read More about Synthesis and structures of O-anthrylmethyl-substituted hexahomotrioxacalix[3]arenes.

A rare and exclusive endoperoxide photoproduct derived from thiacalix[4]arene crown-shaped derivative bearing 9,10-substituted anthracene moiety (2016)
Journal Article
Zhao, J. L., Wu, C., Tomiyasu, H., Zeng, X., Elsegood, M. R., Redshaw, C., & Yamato, T. (2016). A rare and exclusive endoperoxide photoproduct derived from thiacalix[4]arene crown-shaped derivative bearing 9,10-substituted anthracene moiety. Chemistry - An Asian Journal, 11(10), 1606-1612. https://doi.org/10.1002/asia.201600202

A rare and exclusive endoperoxide photoproduct was quantitatively obtained from a thiacalix[4]arene crown-shaped derivative upon irradiation at λ=365 nm; the structure was unambiguously confirmed by 1H/13C NMR spectroscopy and X-ray crystallography.... Read More about A rare and exclusive endoperoxide photoproduct derived from thiacalix[4]arene crown-shaped derivative bearing 9,10-substituted anthracene moiety.

Molecular catalysis for precise olefin polymerization and ROP 2015 (2016)
Journal Article
Redshaw, C. (2016). Molecular catalysis for precise olefin polymerization and ROP 2015. Catalysts, 6(4), 53. https://doi.org/10.3390/catal6040053

The growth of emerging markets, particularly in the Far East, has fuelled the demand for new plastic materials. This in turn has stimulated both academic and industrial interest in the design of catalyst systems for which new Intellectual Property (I... Read More about Molecular catalysis for precise olefin polymerization and ROP 2015.

Synthesis, structures and cytotoxicity studies of p-sulfonatocalix[4]arene lanthanide complexes (2016)
Journal Article
Miller-Shakesby, D. M., Burke, B. P., Nigam, S., Stasiuk, G. J., Prior, T. J., Archibald, S. J., & Redshaw, C. (2016). Synthesis, structures and cytotoxicity studies of p-sulfonatocalix[4]arene lanthanide complexes. CrystEngComm RSC, 18(26), 4977-4987. https://doi.org/10.1039/c6ce00209a

A number of p-sulfonatocalix[4]arene complexes of the lanthanides (Tb, Gd, and Eu) have been prepared, some in the presence of tetraazamacrocycle 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid (DO3A), and fully characterised. Crystal structure d... Read More about Synthesis, structures and cytotoxicity studies of p-sulfonatocalix[4]arene lanthanide complexes.

A pyrene-functionalized triazole-linked hexahomotrioxacalix[3]arene as a fluorescent chemosensor for Zn²⁺ ions (2016)
Journal Article
Wu, C., Ikejiri, Y., Zhao, J.-L., Jiang, X.-K., Ni, X.-L., Zeng, X., Redshaw, C., & Yamato, T. (2016). A pyrene-functionalized triazole-linked hexahomotrioxacalix[3]arene as a fluorescent chemosensor for Zn²⁺ ions. Sensors and actuators. B, Chemical, 228(2 June), 480-485. https://doi.org/10.1016/j.snb.2016.01.051

A new pyrenyl appended hexahomotrioxacalix[3]arene L featuring 1,2,3-triazole linkers was synthesized as a fluorescent chemosensor for Zn²⁺ in mixed aqueous media. It exhibited high affinity toward Zn²⁺, and the monomer and excimer emission of the py... Read More about A pyrene-functionalized triazole-linked hexahomotrioxacalix[3]arene as a fluorescent chemosensor for Zn²⁺ ions.

Functionalization of Pyrene To Prepare Luminescent Materials—Typical Examples of Synthetic Methodology (2016)
Journal Article
Feng, X., Hu, J. Y., Redshaw, C., & Yamato, T. (2016). Functionalization of Pyrene To Prepare Luminescent Materials—Typical Examples of Synthetic Methodology. Chemistry: a European journal, 22(34), 11898-11916. https://doi.org/10.1002/chem.201600465

Pyrene-based π-conjugated materials are considered to be an ideal organic electro-luminescence material for application in semiconductor devices, such as organic light-emitting diodes (OLEDs), organic field-effect transistors (OFETs) and organic phot... Read More about Functionalization of Pyrene To Prepare Luminescent Materials—Typical Examples of Synthetic Methodology.

Vanadium(v) phenolate complexes for ring opening homo- and co-polymerisation of ε-caprolactone, L-lactide and rac-lactide (2015)
Journal Article
Ge, F., Dan, Y., Al-Khafaji, Y., Prior, T. J., Jiang, L., Elsegood, M. R. J., & Redshaw, C. (2016). Vanadium(v) phenolate complexes for ring opening homo- and co-polymerisation of ε-caprolactone, L-lactide and rac-lactide. RSC advances, 6(6), 4792-4802. https://doi.org/10.1039/c5ra24816g

The vanadyl complexes [VO(OtBu)L¹ ] (1) and {[VO(OiPr)]₂ (μ-p-L²ᵖ)} (2) {[VO(OR)]₂ (μ-p-L²ᵐ )} (R = iPr 3, tBu 4) have been prepared from [VO(OR)₃ ] (R = nPr, iPr or tBu) and the respective phenol, namely 2,2′-ethylidenebis(4,6-di-tert-butylphenol) (... Read More about Vanadium(v) phenolate complexes for ring opening homo- and co-polymerisation of ε-caprolactone, L-lactide and rac-lactide.

A single chemosensor for multiple analytes: fluorogenic and ratiometric absorbance detection of Zn²⁺, Mg²⁺ and F⁻, and its cell imaging (2015)
Journal Article
Li, L., Yun, S., Yuan-Hui, Z., Lan, M., Xi, Z., Redshaw, C., & Gang, W. (2016). A single chemosensor for multiple analytes: fluorogenic and ratiometric absorbance detection of Zn²⁺, Mg²⁺ and F⁻, and its cell imaging. Sensors and actuators. B, Chemical, 226, 279-288. https://doi.org/10.1016/j.snb.2015.11.126

A simple coumarin based sensor 1 has been synthesized from the condensation reaction of 7-hydroxycoumarin and ethylenediamine via the intermediate 7-hydroxy-8-aldehyde-coumarin. As a multiple analysis sensor, 1 can monitor Zn²⁺ with the fluorescence... Read More about A single chemosensor for multiple analytes: fluorogenic and ratiometric absorbance detection of Zn²⁺, Mg²⁺ and F⁻, and its cell imaging.

A multichannel thiacalix[4]arene-based fluorescent chemosensor for Zn²⁺, F⁻ ions and imaging of living cells (2015)
Journal Article
Ran, M.-Q., Zhao, J.-L., Zhao, Y.-H., Mou, L., Zeng, X., Redshaw, C., Yuan, J.-Y., & Yamato, T. (2016). A multichannel thiacalix[4]arene-based fluorescent chemosensor for Zn²⁺, F⁻ ions and imaging of living cells. Supramolecular chemistry, 28(5-6), 418-426. https://doi.org/10.1080/10610278.2015.1109645

The fluorescent sensor (3) based on the 1,3-alternate conformation of the thiacalix[4]arene bearing the coumarin fluorophore, appended via an imino group, has been synthesised. Sensing properties were evaluated in terms of a colorimetric and fluoresc... Read More about A multichannel thiacalix[4]arene-based fluorescent chemosensor for Zn²⁺, F⁻ ions and imaging of living cells.

para-Selective C-H amidation of simple arenes with nitriles (2015)
Journal Article
Xiang, S.-K., Li, J.-M., Huang, H., Feng, C., Ni, H.-L., Chen, X.-Z., Wang, B.-Q., Zhao, K.-Q., Hu, P., & Redshaw, C. (2015). para-Selective C-H amidation of simple arenes with nitriles. Advanced Synthesis and Catalysis, 357(16-17), 3435-3440. https://doi.org/10.1002/adsc.201500651

A para-selective C-H amidation of simple arenes with nitriles has been developed. By increasing the amount of arenes, a further meta-selective C-H arylation of the produced amides occurred. Both steric and electronic effects are utilized to control t... Read More about para-Selective C-H amidation of simple arenes with nitriles.

Molybdenum (VI) imido complexes derived from chelating phenols : Synthesis, characterization and ɛ-Caprolactone ROP capability (2015)
Journal Article
Al-Khafaji, Y., Prior, T., Redshaw, C., & Elsegood, M. (2015). Molybdenum (VI) imido complexes derived from chelating phenols : Synthesis, characterization and ɛ-Caprolactone ROP capability. Catalysts, 5(4), 1928-1947. https://doi.org/10.3390/catal5041928

Reaction of the bulky bi-phenols 2,2′-RCH[4,6-(t-Bu)₂C₆H₂OH]₂ (R = Me L¹ᵐᵉH₂, Ph L¹ᵖʰH₂) with the bis(imido) molybdenum(VI) tert-butoxides [Mo(NR¹)(NR²)(Ot-Bu)₂] (R¹ = R² = 2,6-C₆H₃-i-Pr₂; R¹ = t-Bu, R² = C₆F₅) afforded, following the successive remo... Read More about Molybdenum (VI) imido complexes derived from chelating phenols : Synthesis, characterization and ɛ-Caprolactone ROP capability.

Manganese coordination chemistry of bis(imino)phenoxide derived [2 + 2] Schiff-base macrocyclic ligands (2015)
Journal Article
Yang, W., Zhao, K.-Q., Wang, B.-Q., Redshaw, C., Elsegood, M. R., Zhao, J.-L., & Yamato, T. (in press). Manganese coordination chemistry of bis(imino)phenoxide derived [2 + 2] Schiff-base macrocyclic ligands. Dalton Transactions : an international journal of inorganic chemistry, 45(1), 226-236. https://doi.org/10.1039/c5dt03453a

The [2 + 2] Schiff base macrocycles [2,2'-(CH₂CH₂)(C₆H₄N)₂-2,6-(4-RC₆H₃OH)]₂ (IʳH₂), upon reaction with MnCl₂ (two equivalents) afforded the bimetallic complex [Cl₃Mn(NCMe)][MnCl(IᵗᵇᵘH₂)] (2). Under similar conditions, use of the related [2 + 2] oxy-... Read More about Manganese coordination chemistry of bis(imino)phenoxide derived [2 + 2] Schiff-base macrocyclic ligands.

A pyrene-armed hexahomotrioxacalix[3]arene as a multi-sensor via synergistic and demetallation effects (2015)
Journal Article
Redshaw, C., Fukuda, M., Jiang, X., Jin, C. C., Ni, X. L., Wu, C., Yamato, T., & Zeng, X. (2015). A pyrene-armed hexahomotrioxacalix[3]arene as a multi-sensor via synergistic and demetallation effects. Tetrahedron, 71(52), 9593-9597. https://doi.org/10.1016/j.tet.2015.11.004

A new pyrene-armed hexahomotrioxacalix[3]arene L has been synthesized, which exhibits a pronounced fluorescence enhancement response toward Cu²⁺ ions via a Zn²⁺ or Cd²⁺ triggered synergistic effect. Additionally, the L·Cu²⁺+ complex can subsequently... Read More about A pyrene-armed hexahomotrioxacalix[3]arene as a multi-sensor via synergistic and demetallation effects.

Regio-selective substitution at the 1,3- and 6,8-positions of pyrene for the construction of small dipolar molecules (2015)
Journal Article
Feng, X., Tomiyasu, H., Hu, J.-Y., Wei, X., Redshaw, C., Elsegood, M. R. J., Horsburgh, L., Teat, S. J., & Yamato, T. (2015). Regio-selective substitution at the 1,3- and 6,8-positions of pyrene for the construction of small dipolar molecules. Journal of Organic Chemistry, 80(21), 10973-10978. https://doi.org/10.1021/acs.joc.5b02128

© 2015 American Chemical Society. This article presents a novel asymmetrical functionalization strategy for the construction of dipolar molecules via efficient regioselective functionalization along the Z-axis of pyrene at both the 1,3- and 6,8-posit... Read More about Regio-selective substitution at the 1,3- and 6,8-positions of pyrene for the construction of small dipolar molecules.

Synthesis, crystal structure and complexation behaviour study of an efficient Cu2+ ratiometric fluorescent chemosensor based on thiacalix[4]arene (2015)
Journal Article
Zhao, J.-L., Tomiyasu, H., Wu, C., Cong, H., Zeng, X., Rahman, S., Georghiou, P. E., Hughes, D. L., Redshaw, C., & Yamato, T. (2015). Synthesis, crystal structure and complexation behaviour study of an efficient Cu2+ ratiometric fluorescent chemosensor based on thiacalix[4]arene. Tetrahedron, 71(45), 8521-8527. https://doi.org/10.1016/j.tet.2015.09.038

A new thiacalix[4]arene based fluorescent chemosensor L bearing two pyrenyl groups in a 1,3-alternate conformation has been synthesized, and its metal ion-binding and fluorescence-sensing properties were investigated in ethanol. The designed chemosen... Read More about Synthesis, crystal structure and complexation behaviour study of an efficient Cu2+ ratiometric fluorescent chemosensor based on thiacalix[4]arene.