76
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van Heerden DP, Esterhuysen C, Barbour LJ. Elucidating the mechanism responsible for anisotropic thermal expansion in a metal-organic framework. Acta Crystallogr A Found Adv 2015. [DOI: 10.1107/s2053273315093158] [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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77
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Engel ER, Smith VJ, Bezuidenhout CX, Barbour LJ. Large guest-dependent anisotropic thermal expansion in a series of organic inclusion compounds. Acta Crystallogr A Found Adv 2015. [DOI: 10.1107/s2053273315095169] [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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78
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Nikolayenko VI, Barbour LJ. Engineering second- and third-generation MOFs and elucidating their structure-property relationships. Acta Crystallogr A Found Adv 2015. [DOI: 10.1107/s2053273315094437] [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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79
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Alimi LO, Smith VJ, Barbour LJ. Thermosalient effect of an organic aminonitrile and its derivatives. Acta Crystallogr A Found Adv 2015. [DOI: 10.1107/s2053273315093316] [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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80
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Lama P, Barbour LJ. In situcrystallographic evidence to isolate pore forms under gas pressure in a flexible Zn(II)-MOF. Acta Crystallogr A Found Adv 2015. [DOI: 10.1107/s2053273315094528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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81
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Aggarwal H, Das RK, Bhatt PM, Barbour LJ. Isolation of a structural intermediate during switching of degree of interpenetration in a metal-organic framework. Chem Sci 2015; 6:4986-4992. [PMID: 30155004 PMCID: PMC6088436 DOI: 10.1039/c5sc01796c] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Accepted: 06/11/2015] [Indexed: 11/21/2022] Open
Abstract
A known pillared layered metal-organic framework [Co2(ndc)2(bpy)] is shown to undergo a change in degree of interpenetration from a highly porous doubly-interpenetrated framework (2fa) to a less porous triply-interpenetrated framework (3fa). The transformation involves an intermediate empty doubly-interpenetrated phase (2fa') which has been isolated for the first time for this kind of phenomenon by altering the conditions of activation of the as-synthesized material. Interestingly, all the transformations occur in single-crystal to single-crystal fashion. Changes in degree of interpenetration have not been explored much to date and their implications with regard to the porosity of MOFs still remain largely unknown. The present study not only provides a better understanding of such dramatic structural changes in MOF materials, but also describes an original way of controlling interpenetration by carefully optimizing the temperature of activation. In addition to studying the structural mechanism of conversion from 2fa to 3fa, sorption analysis has been carried out on both the intermediate (2fa') and the triply-interpenetrated (3fa) forms to further explain the effect that switching of interpenetration mode has on the porosity of the MOF material.
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82
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Eddaoudi M, Barbour LJ. CO2 separation, capture and reuse: a web themed issue. Chem Commun (Camb) 2015; 51:5554-5. [PMID: 25734404 DOI: 10.1039/c5cc90085a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Guest editors Mohamed Eddaoudi and Len Barbour introduce this web collection celebrating current achievements and future perspectives in CO2 separation, capture and reuse.
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83
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Cai W, Gładysiak A, Anioła M, Smith VJ, Barbour LJ, Katrusiak A. Giant Negative Area Compressibility Tunable in a Soft Porous Framework Material. J Am Chem Soc 2015; 137:9296-301. [DOI: 10.1021/jacs.5b03280] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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84
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85
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Bezuidenhout CX, Smith VJ, Bhatt PM, Esterhuysen C, Barbour LJ. Extreme Carbon Dioxide Sorption Hysteresis in Open-Channel Rigid Metal-Organic Frameworks. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201408933] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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86
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Bezuidenhout CX, Smith VJ, Bhatt PM, Esterhuysen C, Barbour LJ. Extreme Carbon Dioxide Sorption Hysteresis in Open-Channel Rigid Metal-Organic Frameworks. Angew Chem Int Ed Engl 2015; 54:2079-83. [DOI: 10.1002/anie.201408933] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Indexed: 11/09/2022]
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87
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Smith VJ, Marais CG, Suwińska K, Lipkowski J, Szumna A, Esterhuysen C, Barbour LJ. Concomitant polymorphs of p-iso-propylcalix[4]arene. CrystEngComm 2015. [DOI: 10.1039/c5ce00362h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sublimation of p-iso-propylcalix[4]arene (form IP) under reduced pressure results in the concomitant formation of two new polymorphs (forms IIP and IIIP).
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88
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Engel ER, Smith VJ, Bezuidenhout CX, Barbour LJ. Uniaxial negative thermal expansion facilitated by weak host-guest interactions. Chem Commun (Camb) 2014; 50:4238-41. [PMID: 24633431 DOI: 10.1039/c4cc00849a] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nitromethane solvate of 18-crown-6 was investigated by means of variable-temperature single-crystal X-ray diffraction in response to a report of abnormal unit cell contraction. Exceptionally large positive thermal expansion in two axial directions and negative thermal expansion along the third was confirmed. The underlying mechanism relies exclusively on weak electrostatic interactions to yield a linear thermal expansion coefficient of -129 × 10(-6) K(-1), the largest negative value yet observed for an organic inclusion compound.
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89
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Barbour LJ. An introduction to the virtual issue on coordination polymers. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2014; 70:638-9. [PMID: 24992101 DOI: 10.1107/s2053229614008766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 12/18/2013] [Indexed: 11/10/2022]
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90
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Horvath UEI, Cronje S, McKenzie JM, Barbour LJ, Raubenheimer HG. Mono- and Binuclear Gold(I) Amido Compounds of Purine Derivatives. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-2004-11-1234] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A series of neutral dinuclear and mononuclear gold(I) complexes with phosphine and N-bonded 9H-purin-9-ate or 9H-purin-6-ylamine-9-ate have been synthesised under basic conditions and characterised by gHSQC, 1H,13C gHMQC and 1H detected 1H,15N gHMQC experiments in addition to ESI-MS and IR spectroscopy. Intermolecular aurophilic interactions are present in the structures of polymeric 1,2-bis(diphenylphosphine)ethane(9H-purin-9-ate)gold(I) 1, (3.1641(4) Å ) and 1,3- bis(diphenylphosphine)propane(9H-purin-9-ate)gold(I) 3, (3.52Å ). The N-Au-P angle in 1 is exceptionally small (166.3(1)°). Intramolecular aurophilic interaction (3.63 Å ) complemented by hydrogen bonding dictates the non-oligomeric structure of 1,3-bis(diphenylphosphine)propane(9H-purin- 6-ylamin-9-ate)gold(I) (7). Dimeric aurophilic interactions appear in the structure of (tributylphosphine)( 9H-purin-9-ate)gold(I) (11) (3.2311(7) Å ), while the structure in the other mononuclear compound, (triphenylphosphine)(9H-purin-9-ate)gold(I) (9) is organised by Au. . .N-interactions.
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91
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Barbour LJ. Crystallographic studies of gas sorption in metal-organic frameworks. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2014; 70:403. [PMID: 24892586 DOI: 10.1107/s2052520614011652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 05/20/2014] [Indexed: 06/03/2023]
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92
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Aggarwal H, Bhatt PM, Bezuidenhout CX, Barbour LJ. Direct Evidence for Single-Crystal to Single-Crystal Switching of Degree of Interpenetration in a Metal–Organic Framework. J Am Chem Soc 2014; 136:3776-9. [DOI: 10.1021/ja500530y] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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93
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du Plessis M, Smith VJ, Barbour LJ. Single-crystal to single-crystal guest exchange and phase transformations in a porous metallocycle. CrystEngComm 2014. [DOI: 10.1039/c4ce00244j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The acetonitrile guest molecules in this porous metallocycle can be exchanged for different solvent molecules in a single-crystal to single-crystal manner. These guest exchanges are accompanied by a phase transformation in the solid state.
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94
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Herbert SA, Janiak A, Thallapally PK, Atwood JL, Barbour LJ. Diffusion of vaporous guests into a seemingly non-porous organic crystal. Chem Commun (Camb) 2014; 50:15509-12. [DOI: 10.1039/c4cc07366e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The tetragonal apohost phase of p-tert-butyltetramethoxythiacalix[4]arene absorbs hydrochloric acid and iodine.
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95
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Jacobs T, Smith VJ, Thomas LH, Barbour LJ. Carbon dioxide entrapment in an organic molecular host. Chem Commun (Camb) 2014; 50:85-7. [DOI: 10.1039/c3cc46784h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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96
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Shekhah O, Swaidan R, Belmabkhout Y, du Plessis M, Jacobs T, Barbour LJ, Pinnau I, Eddaoudi M. The liquid phase epitaxy approach for the successful construction of ultra-thin and defect-free ZIF-8 membranes: pure and mixed gas transport study. Chem Commun (Camb) 2014; 50:2089-92. [DOI: 10.1039/c3cc47495j] [Citation(s) in RCA: 148] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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97
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Lusi M, Barbour LJ. Temperature-dependent guest reorientation: a reversible order–disorder transformation in a single crystal. CrystEngComm 2014. [DOI: 10.1039/c3ce41572d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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98
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Aggarwal H, Lama P, Barbour LJ. Transformation from non- to double-interpenetration in robust Cd(ii) doubly-pillared-layered metal–organic frameworks. Chem Commun (Camb) 2014; 50:14543-6. [DOI: 10.1039/c4cc07112c] [Citation(s) in RCA: 26] [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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99
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Lama P, Das RK, Smith VJ, Barbour LJ. A combined stretching–tilting mechanism produces negative, zero and positive linear thermal expansion in a semi-flexible Cd(ii)-MOF. Chem Commun (Camb) 2014; 50:6464-7. [DOI: 10.1039/c4cc02634a] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A combined stretching–tilting mechanism in a Cd(ii)-MOF displays an unusual combination of thermal expansion (TE) behaviour – i.e. negative, zero and positive, which is a rare occurrence for metal–organic frameworks (MOFs).
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100
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Rissanen K, Barbour LJ, MacGillivray LR. Structural macrocyclic supramolecular chemistry. CrystEngComm 2014. [DOI: 10.1039/c4ce90042a] [Citation(s) in RCA: 3] [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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