All Outputs (421)

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.

Synthesis and conformational studies of chiral macrocyclic [1.1.1]metacyclophanes containing benzofuran rings (2015)
Journal Article
Islam, M. M., Tomiyasu, H., Matsumoto, T., Tanaka, J., Rahman, S., Georghiou, P. E., Redshaw, C., & Yamato, T. (2015). Synthesis and conformational studies of chiral macrocyclic [1.1.1]metacyclophanes containing benzofuran rings. Organic & biomolecular chemistry, 13(34), 9055-9064. https://doi.org/10.1039/c5ob01002k

Macrocyclic [1.1.1]metacyclophanes (MCPs) containing benzene and benzofuran rings linked by methylene bridges and which can be viewed as calixarene analogues, have been synthesized by demethylation of [3.3.1]MCP-diones with trimethylsilyl iodide (TMS... Read More about Synthesis and conformational studies of chiral macrocyclic [1.1.1]metacyclophanes containing benzofuran rings.

Characterization of the aggregation-induced enhanced emission of N,N'-bis(4-methoxysalicylide)benzene-1,4-diamine (2015)
Journal Article
Wu, F., Xu, G., Zeng, X., Mu, L., Redshaw, C., & Wei, G. (2015). Characterization of the aggregation-induced enhanced emission of N,N'-bis(4-methoxysalicylide)benzene-1,4-diamine. Journal of fluorescence, 25(5), 1183-1189. https://doi.org/10.1007/s10895-015-1605-2

© 2015 Springer Science+Business Media New York. N,N′-bis(4-methoxysalicylide)benzene-1,4-diamine (S1) was synthesized from 4-methoxysalicylaldehyde and p-phenylenediamine and it was found to exhibit interesting aggregation-induced emission enhanceme... Read More about Characterization of the aggregation-induced enhanced emission of N,N'-bis(4-methoxysalicylide)benzene-1,4-diamine.

Molybdenum complexes derived from the oxydianiline [(2-NH₂C₆H₄)₂O] : synthesis, characterization and ε-caprolactone ROP capability (2015)
Journal Article
Yang, W., Zhao, K.-Q., Redshaw, C., & Elsegood, M. R. J. (2015). Molybdenum complexes derived from the oxydianiline [(2-NH₂C₆H₄)₂O] : synthesis, characterization and ε-caprolactone ROP capability. Dalton Transactions : an international journal of inorganic chemistry, 44(29), 13133-13140. https://doi.org/10.1039/c5dt01799h

The reaction of Na₂MoO₄ with 2,2′-oxydianiline (2-aminophenylether), (2-NH₂C₆H₄)₂O, LH₄, in DME (DME = 1,2-dimethoxyethane) in the presence of Et₃N and Me₃SiCl afforded either the bis(imido) molybdenum(VI) complex {Mo(L)Cl₂(DME)} (1), where L = (2-NC... Read More about Molybdenum complexes derived from the oxydianiline [(2-NH₂C₆H₄)₂O] : synthesis, characterization and ε-caprolactone ROP capability.

Synthesis and conformational studies of calixarene analogue chiral [3.3.1]metacyclophanes (2015)
Journal Article
Islam, M. M., Hirotsugu, T., Thuery, P., Matsumoto, T., Tanaka, J., Elsegood, M. R., Redshaw, C., & Yamato, T. (2015). Synthesis and conformational studies of calixarene analogue chiral [3.3.1]metacyclophanes. Journal of molecular structure, 1098, 47-54. https://doi.org/10.1016/j.molstruc.2015.05.036

Trihydroxy[3.3.1]metacyclophane, which can be regarded as an unsymmetrical or incomplete “homocalix[3]arene”, has been prepared from trimethoxy[3.3.1]metacyclophane by demethylation with trimethylsilyl iodide in MeCN. Di-O-methylation at the lower ri... Read More about Synthesis and conformational studies of calixarene analogue chiral [3.3.1]metacyclophanes.

Vanadium(V) tetra-phenolate complexes: synthesis, structural studies and ethylene homo-(co-)polymerization capability (2015)
Journal Article
Redshaw, C., Walton, M. J., Elsegood, M. R. J., Prior, T. J., & Michiue, K. (2015). Vanadium(V) tetra-phenolate complexes: synthesis, structural studies and ethylene homo-(co-)polymerization capability. RSC advances, 5(109), 89783-89796. https://doi.org/10.1039/c5ra20177b

Reaction of α,α,α′,α′-tetrakis(3,5-di-tert-butyl-2-hydroxyphenyl)-p-xylene (p-L¹H₄) with two equivalents of [VO(OR)₃] (R = nPr, tBu) in refluxing toluene afforded, after work-up, the complexes {[VO(OnPr)(THF)]₂ (μ-p-L¹)}·2(THF) (1·2(THF)) or {[VO(OtB... Read More about Vanadium(V) tetra-phenolate complexes: synthesis, structural studies and ethylene homo-(co-)polymerization capability.

Solvent effect and fluorescence response of the 7-tert-butylpyrene-dipicolylamine linkage for the selective and sensitive response toward Zn(II) and Cd(II) ions (2015)
Journal Article
Kowser, Z., Tomiyasu, H., Jiang, X., Rayhan, U., Redshaw, C., & Yamato, T. (2015). Solvent effect and fluorescence response of the 7-tert-butylpyrene-dipicolylamine linkage for the selective and sensitive response toward Zn(II) and Cd(II) ions. New journal of chemistry = Nouveau journal de chimie, 39(5), 4055-4062. https://doi.org/10.1039/c4nj02363c

The different binding behaviour of 7-tert-butylpyrene based chemosensors bearing dipicolylamine (Dpa) linkages at the 1,3-positions was investigated in various solvents for the sensing of Zn(II) and Cd(II).The potential mono-chelating ligand L1 follo... Read More about Solvent effect and fluorescence response of the 7-tert-butylpyrene-dipicolylamine linkage for the selective and sensitive response toward Zn(II) and Cd(II) ions.

Vanadyl calix[6]arene complexes: Synthesis, structural studies and ethylene homo-(co-)polymerization capability (2015)
Journal Article
Redshaw, C., Walton, M., Michiue, K., Chao, Y., Walton, A., Elo, P., Sumerin, V., Jiang, C., & Elsegood, M. R. J. (2015). Vanadyl calix[6]arene complexes: Synthesis, structural studies and ethylene homo-(co-)polymerization capability. Dalton Transactions : an international journal of inorganic chemistry, 44(27), 12292-12303. https://doi.org/10.1039/c5dt00376h

Treatment of p-tert-butylcalix[6]areneH₆ (L⁶H₆) with in situ [LiVO(Ot-Bu)₄] afforded, after work-up, the dark green complex [Li(MeCN)₄][V₂(O)₂Li(MeCN)(L⁶H₂)₂]·8MeCN (1·8MeCN). On one occasion, the reaction led to the formation of a mixture of product... Read More about Vanadyl calix[6]arene complexes: Synthesis, structural studies and ethylene homo-(co-)polymerization capability.

Tetraphenolate niobium and tantalum complexes for the ring opening polymerization of ε-caprolactone (2015)
Journal Article
Al-Khafaji, Y., Sun, X., Prior, T. J., Elsegood, M. R. J., & Redshaw, C. (2015). Tetraphenolate niobium and tantalum complexes for the ring opening polymerization of ε-caprolactone. Dalton Transactions : an international journal of inorganic chemistry, 44(27), 12349-12356. https://doi.org/10.1039/c5dt00272a

Reaction of the pro-ligand α,α,α′,α′-tetra(3,5-di-tert-butyl-2-hydroxyphenyl-p-)xylene-para-tetraphenol (p-L¹H₄) with two equivalents of [NbCl₅] in refluxing toluene afforded, after work-up, the complex {[NbCl₃(NCMe)]₂(μ-p-L¹)}·6MeCN (1·6MeCN). When... Read More about Tetraphenolate niobium and tantalum complexes for the ring opening polymerization of ε-caprolactone.

Vanadium(V) oxo and imido calix[8]arene complexes: synthesis, structural studies, and ethylene homo/copolymerisation capability (2015)
Journal Article
Redshaw, C., Walton, M. J., Lee, D. S., Jiang, C., Elsegood, M. R. J., & Michiue, K. (2015). Vanadium(V) oxo and imido calix[8]arene complexes: synthesis, structural studies, and ethylene homo/copolymerisation capability. Chemistry: a European journal, 21(13), 5199-5210. https://doi.org/10.1002/chem.201406084

Interaction of p-tert-butylcalix[8]areneH₈ (L⁸H₈) with in-situ generated [NaVO(Ot-Bu)₄] (from VOCl₃ and four equivalents of NaOtBu) afforded the dark brown complex [Na(NCMe)₅][(VO)₂L⁸H]·4MeCN (1·4MeCN), in which the calix[8]arene adopts a saddle-shap... Read More about Vanadium(V) oxo and imido calix[8]arene complexes: synthesis, structural studies, and ethylene homo/copolymerisation capability.

Synthesis of a ditopic homooxacalix[3]arene for fluorescence enhanced detection of heavy and transition metal ions (2015)
Journal Article
Redshaw, C., Jin, C.-C., Mou, L., Ni, X.-L., Wu, Y., & Yamato, T. (2015). Synthesis of a ditopic homooxacalix[3]arene for fluorescence enhanced detection of heavy and transition metal ions. Supramolecular chemistry, 27(7-8), 501-507. https://doi.org/10.1080/10610278.2014.1002841

A pyrene-appended ratiometric fluorescent chemosensor L based on a synthetic approach of insulating the fluorophore from the ionophore by a specific molecular spacer has been synthesised and characterised. The fluorescence spectra changes of L sugges... Read More about Synthesis of a ditopic homooxacalix[3]arene for fluorescence enhanced detection of heavy and transition metal ions.

A uracil nitroso amine based colorimetric sensor for the detection of Cu²⁺ ions from aqueous environment and its practical applications (2015)
Journal Article
Patil, S. R., Nandre, J. P., Patil, P. A., Sahoo, S. K., Devi, M., Pradeep, C. P., Fabiao, Y., Chen, L., Redshaw, C., & Patil, U. D. (2015). A uracil nitroso amine based colorimetric sensor for the detection of Cu²⁺ ions from aqueous environment and its practical applications. RSC advances, 5(28), 21464-21470. https://doi.org/10.1039/c4ra10419f

A simple uracil nitroso amine based colorimetric chemosensor (UNA-1) has been synthesized and screened for its cation recognition ability. Sensor UNA-1 exhibited a high sensitivity and selectivity towards Cu²⁺ ions in aqueous medium in the presence o... Read More about A uracil nitroso amine based colorimetric sensor for the detection of Cu²⁺ ions from aqueous environment and its practical applications.

Influence of substituent position on thermal properties, photoluminescence and morphology of pyrene-fluorene derivatives (2015)
Journal Article
Feng, X., Hu, J.-Y., Wei, X.-F., Redshaw, C., & Yamato, T. (2015). Influence of substituent position on thermal properties, photoluminescence and morphology of pyrene-fluorene derivatives. Journal of molecular structure, 1086(April), 216-222. https://doi.org/10.1016/j.molstruc.2015.01.018

New position-dependent conjugated hydrocarbon dyes containing a pyrene core and multi-fluorene moieties 3 have been synthesized and characterized by ¹H/¹³C NMR spectroscopy, as well as by optical and theoretical studies. The solubility of mono-, bis-... Read More about Influence of substituent position on thermal properties, photoluminescence and morphology of pyrene-fluorene derivatives.

The first study about the relationship between the extractability of thiacalix[4]arene derivatives and the position of the coordination binding sites (2015)
Journal Article
Zhao, J.-L., Tomiyasu, H., Ni, X.-L., Zeng, X., Elsegood, M. R. J., Redshaw, C., Rahman, S., Georghiou, P. E., Teat, S. J., & Yamato, T. (2015). The first study about the relationship between the extractability of thiacalix[4]arene derivatives and the position of the coordination binding sites. Organic & biomolecular chemistry, 13(11), 3476-3483. https://doi.org/10.1039/c4ob02393e

Three organic ionophores (2–4) based on the p-tert-butylthiacalix[4]arene backbone, blocked in the 1,3-alternate conformation, bearing two pyridyl coordinating moieties (ortho for 2, meta for 3 and para for 4), have been synthesized and characterized... Read More about The first study about the relationship between the extractability of thiacalix[4]arene derivatives and the position of the coordination binding sites.

Mono- and tetra-nuclear copper complexes bearing bis(imino)phenoxide derived ligands: catalytic evaluation for benzene oxidation and ROP of ε-caprolactone (2015)
Journal Article
Wang, X., Zhao, K.-Q., Elsegood, M. R. J., Prior, T. J., Liu, X., Wu, L., Sanz, S., Brechin, E. K., & Redshaw, C. (2015). Mono- and tetra-nuclear copper complexes bearing bis(imino)phenoxide derived ligands: catalytic evaluation for benzene oxidation and ROP of ε-caprolactone. RSC advances, 5(71), 57414-57424. https://doi.org/10.1039/c5ra08696e

Complexes of the type [Cu(L)₂] (1) and [Cu₄L₂(μ₄-O)(OAc)₄] (2) have been obtained from the reaction of the phenoxydiimine 1,3-(2,6-R²₂C₆H₃N=CH)₂-5-R¹ C₆H₂OH-2 (LH) (where R¹ = Me, tBu, Cl; R² = Me, iPr) with copper(II) acetate [Cu(OAc)₂]; changing th... Read More about Mono- and tetra-nuclear copper complexes bearing bis(imino)phenoxide derived ligands: catalytic evaluation for benzene oxidation and ROP of ε-caprolactone.

Positive and negative allosteric effects of thiacalix[4]arene-based receptors having urea and crown-ether moieties (2015)
Journal Article
Tomiyasu, H., Zhao, J.-L., Ni, X.-L., Zeng, X., Elsegood, M. R. J., Jones, B., Redshaw, C., Teat, S. J., & Yamato, T. (2015). Positive and negative allosteric effects of thiacalix[4]arene-based receptors having urea and crown-ether moieties. RSC advances, 5(19), 14747-14755. https://doi.org/10.1039/c4ra15905e

Heteroditopic receptors (4ₐ₋ₑ) based on a thiacalix[4]arene in the 1,3-alternate conformation, which have two urea moieties linking various phenyl groups substituted with either electron-donating or -withdrawing groups at their m-, or p-positions wit... Read More about Positive and negative allosteric effects of thiacalix[4]arene-based receptors having urea and crown-ether moieties.

Iron(III) bromide catalyzed bromination of 2-tert-butylpyrene and corresponding position-dependent aryl-functionalized pyrene derivatives (2014)
Journal Article
Feng, X., Hu, J.-Y., Tomiyasu, H., Tao, Z., Redshaw, C., Elsegood, M. R. J., Horsburgh, L., Teat, S. J., Wei, X.-F., & Yamato, T. (2014). Iron(III) bromide catalyzed bromination of 2-tert-butylpyrene and corresponding position-dependent aryl-functionalized pyrene derivatives. RSC advances, 5(12), 8835-8848. https://doi.org/10.1039/C4RA12216J

The present work probes the bromination mechanism of 2-tert-butylpyrene (1), which regioselectively affords mono-, di-, tri- and tetra-bromopyrenes, by theoretical calculation and detailed experimental methods. The bromine atom may be directed to the... Read More about Iron(III) bromide catalyzed bromination of 2-tert-butylpyrene and corresponding position-dependent aryl-functionalized pyrene derivatives.