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Stylianou KC, Bacsa J, Bradshaw D, Rosseinsky MJ. A 3D Porous Metal Organic Framework Based on Infinite 1D Nickel(II) Chains with Rutile Topology Displaying Open Metal Sites. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400136] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Bradshaw D, Danta M. Commentary: tenofovir is superior to entecavir in HBeAg-positive chronic hepatitis B patients. Aliment Pharmacol Ther 2014; 39:992. [PMID: 24689343 DOI: 10.1111/apt.12675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 02/04/2014] [Indexed: 12/12/2022]
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Yadnum S, Roche J, Lebraud E, Négrier P, Garrigue P, Bradshaw D, Warakulwit C, Limtrakul J, Kuhn A. Inside Back Cover: Site-Selective Synthesis of Janus-type Metal-Organic Framework Composites (Angew. Chem. Int. Ed. 15/2014). Angew Chem Int Ed Engl 2014. [DOI: 10.1002/anie.201401103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Yadnum S, Roche J, Lebraud E, Négrier P, Garrigue P, Bradshaw D, Warakulwit C, Limtrakul J, Kuhn A. Site-Selective Synthesis of Janus-type Metal-Organic Framework Composites. Angew Chem Int Ed Engl 2014; 53:4001-5. [DOI: 10.1002/anie.201400581] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Indexed: 11/09/2022]
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Aguilera-Sigalat J, Bradshaw D. A colloidal water-stable MOF as a broad-range fluorescent pH sensor via post-synthetic modification. Chem Commun (Camb) 2014; 50:4711-3. [DOI: 10.1039/c4cc00659c] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We report the pH dependent fluorescence of indole-functionalised UiO-66-NH2 across the pH range 1–12.
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31
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Bradshaw D, Danta M. Spread of Hepatitis C Virus Infection in Men Who Have Sex With Men. Clin Infect Dis 2014; 58:136. [DOI: 10.1093/cid/cit605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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32
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Bradshaw D, El-Hankari S, Lupica-Spagnolo L. Supramolecular templating of hierarchically porous metal–organic frameworks. Chem Soc Rev 2014; 43:5431-43. [DOI: 10.1039/c4cs00127c] [Citation(s) in RCA: 201] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This tutorial review summarises recent advances in the soft templating of metal–organic frameworks with hierarchical porosity across the micro- and mesoporous regimes.
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Barber TJ, Bradshaw D, Hughes D, Leonidou L, Margetts A, Ratcliffe D, Thornton S, Pozniak A, Asboe D, Mandalia S, Boffito M, Davies N, Gazzard B, Catalan J. Screening for HIV-related neurocognitive impairment in clinical practice: challenges and opportunities. AIDS Care 2013; 26:160-8. [PMID: 23869661 DOI: 10.1080/09540121.2013.819401] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
With increasingly successful management of HIV, focus has shifted away from AIDS-related complications to other chronic co-morbidities. For HIV-related cognitive problems, the true aetiopathogenesis and epidemiology remains unclear. Rather than a systematic review, this paper presents the challenges and the opportunities we faced in establishing our own clinical service. Papers were identified using Pubmed and the terms "screening", "HIV" and "neurocognitive". This article covers the background of HIV-associated neurocognitive disorders (HAND) with a focus on HIV-related neurocognitive impairment (NCI), detailing classification, prevalence, diagnostic categories and diagnostic uncertainties. Screening is discussed, including a comparison of the available screening tools for cognitive deficits in HIV-infected patients and the importance of practice effects. Discussed also are the normal ranges and the lack thereof and potential investigations for those found to have impairments. We conclude by discussing the role of NCI screening in routine clinical care at the current time.
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Huo J, Marcello M, Garai A, Bradshaw D. MOF-polymer composite microcapsules derived from Pickering emulsions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:2717-22. [PMID: 23554180 DOI: 10.1002/adma.201204913] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 02/13/2013] [Indexed: 05/21/2023]
Abstract
Hollow composite microcapsules are prepared by the assembly of pre-formed nanocrystals of metal-organic frameworks (MOFs) around emulsion droplets, followed by interfacial polymerisation of the interior. The micropores of the MOF crystals embedded within a semipermeable hierarchically structured polymeric membrane are an effective combination for the retention of encapsulated dye molecules. Release can be triggered however by acid dissolution of the MOF component.
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Garai A, Shepherd W, Huo J, Bradshaw D. Biomineral-inspired growth of metal–organic frameworks in gelatin hydrogel matrices. J Mater Chem B 2013; 1:3678-3684. [DOI: 10.1039/c3tb20814a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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36
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Stylianou KC, Rabone J, Chong SY, Heck R, Armstrong J, Wiper PV, Jelfs KE, Zlatogorsky S, Bacsa J, McLennan AG, Ireland CP, Khimyak YZ, Thomas KM, Bradshaw D, Rosseinsky MJ. Dimensionality transformation through paddlewheel reconfiguration in a flexible and porous Zn-based metal-organic framework. J Am Chem Soc 2012; 134:20466-78. [PMID: 23121122 DOI: 10.1021/ja308995t] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The reaction between Zn and a pyrene-based ligand decorated with benzoate fragments (H(4)TBAPy) yields a 2D layered porous network with the metal coordination based on a paddlewheel motif. Upon desolvation, the structure undergoes a significant and reversible structural adjustment with a corresponding reduction in crystallinity. The combination of computationally assisted structure determination and experimental data analysis of the desolvated phase revealed a structural change in the metal coordination geometry from square-pyramidal to tetrahedral. Simulations of desolvation showed that the local distortion of the ligand geometry followed by the rotation and displacement of the pyrene core permits the breakup of the metal-paddlewheel motifs and the formation of 1D Zn-O chains that cross-link adjacent layers, resulting in a dimensionality change from the 2D layered structure to a 3D structure. Constrained Rietveld refinement of the powder X-ray diffraction pattern of the desolvated phase and the use of other analytical techniques such as porosity measurements, (13)C CP MAS NMR spectroscopy, and fluorescence spectroscopy strongly supported the observed structural transformation. The 3D network is stable up to 425 °C and is permanently porous to CO(2) with an apparent BET surface area of 523(8) m(2)/g (p/p° = 0.02-0.22). Because of the hydrophobic nature, size, and shape of the pores of the 3D framework, the adsorption behavior of the structure toward p-xylene and m-xylene was studied, and the results indicated that the shape of the isotherm and the kinetics of the adsorption process are determined mainly by the shape of the xylene isomers, with each xylene isomer interacting with the host framework in a different manner.
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Matzopoulos R, Prinsloo M, Laubscher R, Gwebushe N, Pillay-Van Wyk V, Bradshaw D. ASSESSING FIELDWORKER RELIABILITY IN A NATIONAL STUDY OF INJURY MORTALITY IN SOUTH AFRICA. Inj Prev 2012. [DOI: 10.1136/injuryprev-2012-040580b.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Bradshaw D, Pallawela S, Scott C, Asboe D, Nelson M, Day S. P49 Otosyphilis: missed opportunities for early treatment? Br J Vener Dis 2012. [DOI: 10.1136/sextrans-2012-050601c.49] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Shefner J, Barohn R, Boylan K, Bradshaw D, Brooks B, Heiman-Patterson T, Katz J, Maragakis N, Mitsumoto H, Pestronk A, Simmons Z, Wolff A, Lee J, Masonek J, Jones D, Meng L, Cedarbaum J. A Study To Evaluate Safety, and Tolerability of Repeated Doses of CK-2017357 (CK-357) in Patients with Amyotrophic Lateral Sclerosis (S25.005). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.s25.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Burger EH, Groenewald P, Bradshaw D, Ward AM, Yudkin PL, Volmink J. Validation study of cause of death statistics in Cape Town, South Africa, found poor agreement. J Clin Epidemiol 2012; 65:309-16. [DOI: 10.1016/j.jclinepi.2011.08.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Revised: 06/02/2011] [Accepted: 08/08/2011] [Indexed: 11/30/2022]
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Bradshaw D, Garai A, Huo J. Metal–organic framework growth at functional interfaces: thin films and composites for diverse applications. Chem Soc Rev 2012; 41:2344-81. [DOI: 10.1039/c1cs15276a] [Citation(s) in RCA: 495] [Impact Index Per Article: 41.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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42
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Pillay-van Wyk V, Bradshaw D, Groenewald P, Laubscher R. Improving the quality of medical certification of cause of death: the time is now! S Afr Med J 2011; 101:626. [PMID: 21920165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Accepted: 06/02/2011] [Indexed: 05/31/2023] Open
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43
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Bradshaw D, Stylianou KC, Heck R, Bacsa J, Chong S, Rabone J, Khimyak YZ, Rosseinsky MJ. Flexible pyrene-derived frameworks for sensing and separation. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311097728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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44
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Stylianou KC, Warren JE, Chong SY, Rabone J, Bacsa J, Bradshaw D, Rosseinsky MJ. CO2 selectivity of a 1D microporous adenine-based metal–organic framework synthesised in water. Chem Commun (Camb) 2011; 47:3389-91. [DOI: 10.1039/c0cc05559j] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Prinsloo M, Bradshaw D, Laubscher R. Historical trends of homicide and road traffic fatalities in South Africa: 1968-1989. Inj Prev 2010. [DOI: 10.1136/ip.2010.029215.757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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46
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Rabone J, Yue YF, Chong SY, Stylianou KC, Bacsa J, Bradshaw D, Darling GR, Berry NG, Khimyak YZ, Ganin AY, Wiper P, Claridge JB, Rosseinsky MJ. An Adaptable Peptide-Based Porous Material. Science 2010; 329:1053-7. [PMID: 20798314 DOI: 10.1126/science.1190672] [Citation(s) in RCA: 294] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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47
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Stylianou KC, Heck R, Chong SY, Bacsa J, Jones JTA, Khimyak YZ, Bradshaw D, Rosseinsky MJ. A Guest-Responsive Fluorescent 3D Microporous Metal−Organic Framework Derived from a Long-Lifetime Pyrene Core. J Am Chem Soc 2010; 132:4119-30. [DOI: 10.1021/ja906041f] [Citation(s) in RCA: 419] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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48
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49
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Tozawa T, Jones JTA, Swamy SI, Jiang S, Adams DJ, Shakespeare S, Clowes R, Bradshaw D, Hasell T, Chong SY, Tang C, Thompson S, Parker J, Trewin A, Bacsa J, Slawin AMZ, Steiner A, Cooper AI. Porous organic cages. NATURE MATERIALS 2009; 8:973-978. [PMID: 19855385 DOI: 10.1038/nmat2545] [Citation(s) in RCA: 738] [Impact Index Per Article: 49.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2009] [Accepted: 09/14/2009] [Indexed: 05/28/2023]
Abstract
Porous materials are important in a wide range of applications including molecular separations and catalysis. We demonstrate that covalently bonded organic cages can assemble into crystalline microporous materials. The porosity is prefabricated and intrinsic to the molecular cage structure, as opposed to being formed by non-covalent self-assembly of non-porous sub-units. The three-dimensional connectivity between the cage windows is controlled by varying the chemical functionality such that either non-porous or permanently porous assemblies can be produced. Surface areas and gas uptakes for the latter exceed comparable molecular solids. One of the cages can be converted by recrystallization to produce either porous or non-porous polymorphs with apparent Brunauer-Emmett-Teller surface areas of 550 and 23 m2 g(-1), respectively. These results suggest design principles for responsive porous organic solids and for the modular construction of extended materials from prefabricated molecular pores.
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Perez Barrio J, Rebilly JN, Carter B, Bradshaw D, Bacsa J, Ganin AY, Park H, Trewin A, Vaidhyanathan R, Cooper AI, Warren JE, Rosseinsky MJ. Control of porosity geometry in amino acid derived nanoporous materials. Chemistry 2008; 14:4521-32. [PMID: 18381717 DOI: 10.1002/chem.200701556] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Substitution of the pillaring ligand in the homochiral open-framework [Ni(2)(L-asp)(2)(bipy)] by extended bipy-type ligands leads to a family of layer-structured, homochiral metal-organic frameworks. The 1D channel topology can be modified by the nature of the organic linker, with shape, cross-section and the chemical functionality tuneable. In addition, the volume of these channels can be increased by up to 36 % compared to the parent [Ni(2)(L-asp)(2)(bipy)]. The linker 1,4-dipyridylbenzene (3rbp) gives access to a new layered homochiral framework [Ni(2)(L-asp)(2)(3rbp)] with channels of a different shape. In specific cases, non-porous analogues with the linker also present as a guest can be activated to give porous materials after sublimation. Their CO(2) uptake shows an increase of up to 30 % with respect to the parent [Ni(2)(L-asp)(2)(bipy)] framework.
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