1
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Nishiyabu R, Shimizu A. Boronic acid as an efficient anchor group for surface modification of solid polyvinyl alcohol. Chem Commun (Camb) 2018; 52:9765-8. [PMID: 27311634 DOI: 10.1039/c6cc02782b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report the use of boronic acid as an anchor group for surface modification of solid polyvinyl alcohol (PVA); the surfaces of PVA microparticles, films, and nanofibers were chemically modified with boronic acid-appended fluorescent dyes through boronate esterification using a simple soaking technique in a short time under ambient conditions.
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Affiliation(s)
- Ryuhei Nishiyabu
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan.
| | - Ai Shimizu
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan.
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2
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Sánchez-Portillo P, Barba V. Bis-Imine Boronic Esters Obtained by One-Step Multicomponent Reactions. Synthesis and X-Ray Diffraction Structural Analysis. ChemistrySelect 2017. [DOI: 10.1002/slct.201702465] [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]
Affiliation(s)
- Paola Sánchez-Portillo
- Centro de Investigaciones Químicas-IICBA; Universidad Autónoma del Estado de Morelos; Av. Universidad 1001, C.P. 62209 Cuernavaca, Morelos México
| | - Victor Barba
- Centro de Investigaciones Químicas-IICBA; Universidad Autónoma del Estado de Morelos; Av. Universidad 1001, C.P. 62209 Cuernavaca, Morelos México
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3
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Structural analysis of pyridine-imino boronic esters involving secondary interactions on solid state. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.01.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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4
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Luisier N, Scopelliti R, Severin K. Supramolecular gels based on boronate esters and imidazolyl donors. SOFT MATTER 2016; 12:588-593. [PMID: 26506208 DOI: 10.1039/c5sm02298c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Dative boron-nitrogen bonds can be used for the controlled assembly of boronate esters and N-donor ligands. So far, most investigations have focused on crystalline assemblies. In contrast, there are very few reports about soft materials based on dative B-N bonds. Here, we describe the formation of gels by aggregation of diboronate esters and ditopic bisimidazolyl donor ligands. Analyses of low molecular weight model compounds by NMR spectroscopy, isothermal titration calorimetry, and X-ray crystallography reveal that imidazolyl ligands form particularly strong dative bonds with boronate esters. The strong interaction allows gel formation in competitive polar solvents such as THF and acetone. In less polar solvents, very low critical gel concentrations of down to 0.02 wt% are observed. By using a diboronate ester linked by an azobenzene group, it is possible to form a photoresponsive gel.
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Affiliation(s)
- N Luisier
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
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5
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Cruz‐Huerta J, Campillo‐Alvarado G, Höpfl H, Rodríguez‐Cuamatzi P, Reyes‐Márquez V, Guerrero‐Álvarez J, Salazar‐Mendoza D, Farfán‐García N. Self‐Assembly of Triphenylboroxine and the Phenylboronic Ester of Pentaerythritol with Piperazine,
trans
‐1,4‐Diaminocyclohexane, and 4‐Aminopyridine. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501121] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Jorge Cruz‐Huerta
- Centro de Investigaciones Químicas, Instituto de Investigación en Ciencias Básicas e Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa, Cuernavaca 62209, Morelos, México
| | - Gonzalo Campillo‐Alvarado
- Centro de Investigaciones Químicas, Instituto de Investigación en Ciencias Básicas e Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa, Cuernavaca 62209, Morelos, México
| | - Herbert Höpfl
- Centro de Investigaciones Químicas, Instituto de Investigación en Ciencias Básicas e Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa, Cuernavaca 62209, Morelos, México
| | - Patricia Rodríguez‐Cuamatzi
- Centro de Investigaciones Químicas, Instituto de Investigación en Ciencias Básicas e Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa, Cuernavaca 62209, Morelos, México
| | - Viviana Reyes‐Márquez
- Centro de Investigaciones Químicas, Instituto de Investigación en Ciencias Básicas e Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa, Cuernavaca 62209, Morelos, México
| | - Jorge Guerrero‐Álvarez
- Centro de Investigaciones Químicas, Instituto de Investigación en Ciencias Básicas e Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa, Cuernavaca 62209, Morelos, México
| | - Domingo Salazar‐Mendoza
- Universidad Tecnológica de la Mixteca, Carretera a Acatlima Km 2.5, Huajuapan de León 69000, Oaxaca, México
| | - Norberto Farfán‐García
- Facultad de Química, Departamento Química Orgánica, Universidad Nacional Autónoma de México, Cd. Universitaria, Coyoacán, México 04510, México
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6
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Urieta J, Maroto BL, Moreno F, Agarrabeitia AR, Ortiz MJ, de la Moya S. Preparation of dipyrrins from F-BODIPYs by treatment with methanesulfonic acids. RSC Adv 2015. [DOI: 10.1039/c5ra14914b] [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] Open
Abstract
Compatible with highly reactive functionalities workable with strongly electron-poor starting products.
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Affiliation(s)
- J. Urieta
- Departmento de Química Orgánica I
- Universidad Complutense de Madrid
- Ciudad Universitaria s/n
- Madrid
- Spain
| | - B. L. Maroto
- Departmento de Química Orgánica I
- Universidad Complutense de Madrid
- Ciudad Universitaria s/n
- Madrid
- Spain
| | - F. Moreno
- Departmento de Química Orgánica I
- Universidad Complutense de Madrid
- Ciudad Universitaria s/n
- Madrid
- Spain
| | - A. R. Agarrabeitia
- Departmento de Química Orgánica I
- Universidad Complutense de Madrid
- Ciudad Universitaria s/n
- Madrid
- Spain
| | - M. J. Ortiz
- Departmento de Química Orgánica I
- Universidad Complutense de Madrid
- Ciudad Universitaria s/n
- Madrid
- Spain
| | - S. de la Moya
- Departmento de Química Orgánica I
- Universidad Complutense de Madrid
- Ciudad Universitaria s/n
- Madrid
- Spain
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7
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8
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Garcia-Grajeda BA, Höpfl H, Guerrero-Alvarez JA, Campos-Gaxiola JJ, Cruz-Enríquez A. 2,6-Dihy-droxy-4-oxo-2-(pyridin-1-ium-3-yl)-4H-1,3,2-benzodioxaborinin-2-ide 0.67-hydrate. Acta Crystallogr Sect E Struct Rep Online 2014; 70:o388-9. [PMID: 24826112 PMCID: PMC3998600 DOI: 10.1107/s1600536814004267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Accepted: 02/24/2014] [Indexed: 11/23/2022]
Abstract
The asymmetric unit of the title compound, C12H10BNO5·0.67H2O, contains three independent pyridinylboronic acid esters adopting zwitterionic forms and two water molecules. The six-membered heterocyclic rings in the boronic esters have half-chair conformations and the deviations of the B atoms from the boronate mean planes range from 0.456 (3) to 0.657 (3) Å. All of the B atoms have tetrahedral coordination environments, with B—O and B—C bond lengths of 1.446 (4)–1.539 (3) and 1.590 (5)–1.609 (5) Å, respectively. In the crystal, the ester and water molecules are linked into a three-dimensional network by a large number of O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds. The crystal packing is further accomplished by π–π interactions, with centroid–centroid distances of 3.621 (4)–3.787 (4) Å.
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Affiliation(s)
- Blanca A Garcia-Grajeda
- Facultad de Ingenieria Mochis, Universidad Autónoma de Sinaloa, Fuente Poseidón y Prol. A. Flores S/N, CP 81223, C.U. Los Mochis, Sinaloa, México
| | - Herbert Höpfl
- Centro de Graduados e Investigación en Química, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, CP 62210, Cuernavaca, Morelos, México
| | - Jorge A Guerrero-Alvarez
- Centro de Graduados e Investigación en Química, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, CP 62210, Cuernavaca, Morelos, México
| | - José J Campos-Gaxiola
- Facultad de Ingenieria Mochis, Universidad Autónoma de Sinaloa, Fuente Poseidón y Prol. A. Flores S/N, CP 81223, C.U. Los Mochis, Sinaloa, México
| | - Adriana Cruz-Enríquez
- Facultad de Ingenieria Mochis, Universidad Autónoma de Sinaloa, Fuente Poseidón y Prol. A. Flores S/N, CP 81223, C.U. Los Mochis, Sinaloa, México
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9
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Celis NA, Godoy-Alcántar C, Guerrero-Álvarez J, Barba V. Boron Macrocycles Based on Multicomponent Assemblies using (3-Aminophenyl)boronic Acid and Pentaerythritol as Common Reagents; Molecular Receptors toward Lewis Bases. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301450] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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10
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Nishiyabu R, Sugino Y, Kubo Y. White-light emitting boronate microparticles for potential use as reusable bright chemosensors in water. Chem Commun (Camb) 2013; 49:9869-71. [DOI: 10.1039/c3cc45739g] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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11
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Pascu M, Ruggi A, Scopelliti R, Severin K. Synthesis of borasiloxane-based macrocycles by multicomponent condensation reactions in solution or in a ball mill. Chem Commun (Camb) 2013; 49:45-7. [DOI: 10.1039/c2cc37538a] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Tlahuext-Aca A, Höpfl H, Medrano-Valenzuela F, Guerrero-Alvarez J, Tlahuext H, Ochoa Lara K, Reyes-Márquez V, Tlahuextl M. Synthesis, Spectroscopic Characterization, DFT Calculations, and Dynamic Behavior of Mononuclear Macrocyclic Diorganotin(IV) Bis-Dithiocarbamate Complexes. Z Anorg Allg Chem 2012. [DOI: 10.1002/zaac.201200099] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Germán-Acacio JM, Tlahuext H, Höpfl H. (E)-2-{[2-(2-Hy-droxy-ethyl-amino)-ethyl-imino]-meth-yl}phenol. Acta Crystallogr Sect E Struct Rep Online 2012; 67:o2849. [PMID: 22219892 PMCID: PMC3247587 DOI: 10.1107/s1600536811039997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Accepted: 09/28/2011] [Indexed: 11/10/2022]
Abstract
The asymmetric unit of the title compound, C(11)H(16)N(2)O(2), contains two independent conformational isomers which show intra-molecular aromatic-imine O-H⋯N hydrogen bonds. In the crystal, neighboring mol-ecules are linked through inter-molecular aliphatic-aliphatic O-H⋯N, aliphatic-aromatic N-H⋯O and C-H⋯O inter-actions into hydrogen-bonded layers parallel to the ab plane.
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Affiliation(s)
- Juan M Germán-Acacio
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos. Av. Universidad 1001, CP 62209, Cuernavaca, Mexico
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14
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Cruz-Huerta J, Salazar-Mendoza D, Hernández-Paredes J, Hernández Ahuactzi IF, Höpfl H. N-containing boronic esters as self-complementary building blocks for the assembly of 2D and 3D molecular networks. Chem Commun (Camb) 2012; 48:4241-3. [DOI: 10.1039/c2cc00144f] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Matsushima Y, Nishiyabu R, Takanashi N, Haruta M, Kimura H, Kubo Y. Boronate self-assemblies with embedded Au nanoparticles: preparation, characterization and their catalytic activities for the reduction of nitroaromatic compounds. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm34797k] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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16
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Icli B, Sheepwash E, Riis-Johannessen T, Schenk K, Filinchuk Y, Scopelliti R, Severin K. Dative boron–nitrogen bonds in structural supramolecular chemistry: multicomponent assembly of prismatic organic cages. Chem Sci 2011. [DOI: 10.1039/c1sc00320h] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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17
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Nishiyabu R, Kubo Y, James TD, Fossey JS. Boronic acid building blocks: tools for self assembly. Chem Commun (Camb) 2011; 47:1124-50. [DOI: 10.1039/c0cc02921a] [Citation(s) in RCA: 411] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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18
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Barba V, Hernández R, Santillan R, Farfán N. Boron complexes derived from the condensation reaction of 3-aminophenylboronic acid and 1,3-diketones. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.05.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Abstract
AbstractAddition of pinacolborane (HBO2C2Me4) to 2-iodoaniline can be catalyzed using a number of palladium complexes, including [(t-Bu)2PCl]2PdCl2 (PXPd), to give the corresponding boronate ester 2-H2NC6H4(BO2C2Me4) in excellent yields. The PXPd system could also be used in the catalyzed borylation of substituted anilines to give the corresponding aminoboronate esters in moderate to high yields.
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20
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Vega A, Zarate M, Tlahuext H, Höpfl H. 3-Amino-phenyl-boronic acid monohydrate. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o1260. [PMID: 21579363 PMCID: PMC2979464 DOI: 10.1107/s1600536810015655] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2010] [Accepted: 04/28/2010] [Indexed: 12/03/2022]
Abstract
In the title compound, C(6)H(8)BNO(2)·H(2)O, the almost planar boronic acid mol-ecules (r.m.s. deviation = 0.044 Å) form inversion dimers, linked by pairs of O-H⋯O hydrogen bonds. The water mol-ecules link these dimers into [100] chains by way of O-H⋯O hydrogen bonds, and N-H⋯O links generate (100) sheets.
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Affiliation(s)
- Araceli Vega
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, CP 62209, Cuernavaca, Mexico
| | - Maria Zarate
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, CP 62209, Cuernavaca, Mexico
| | - Hugo Tlahuext
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, CP 62209, Cuernavaca, Mexico
| | - Herbert Höpfl
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, CP 62209, Cuernavaca, Mexico
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21
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Crawford SM, Thompson A. Conversion of 4,4-Difluoro-4-bora-3a,4a-diaza-s-indacenes (F-BODIPYs) to Dipyrrins with a Microwave-Promoted Deprotection Strategy. Org Lett 2010; 12:1424-7. [DOI: 10.1021/ol902908j] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sarah M. Crawford
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4J3, Canada
| | - Alison Thompson
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, B3H 4J3, Canada
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22
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Liu W, Pink M, Lee D. Conjugated polymer sensors built on pi-extended borasiloxane cages. J Am Chem Soc 2009; 131:8703-7. [PMID: 19530736 DOI: 10.1021/ja902333p] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient 2 + 2 cyclocondensation with dihydroxysilane converted simple arylboronic acids to bifunctional borasiloxane cage molecules, which were subsequently electropolymerized to furnish air-stable thin films. The extended [p,pi]-conjugation that defines the rigid backbone of this new conjugated polymer (CP) motif gives rise to longer-wavelength UV-vis transitions upon oxidative doping, the spectral window and intensity of which can be modified by interaction with Lewis basic reagents. Notably, this boron-containing CP undergoes a rapid and reversible color change from green to orange upon exposure to volatile amine samples under ambient conditions. This direct naked-eye detection scheme can best be explained by invoking the reversible B-N dative bond formation that profoundly influences the p-pi* orbital overlap.
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Affiliation(s)
- Wenjun Liu
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, USA
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23
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Barba V, Hernández R, Höpfl H, Santillan R, Farfán N. 3-Aminophenylboronic acid as building block for the construction of calix- and cage-shaped boron complexes. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2009.02.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Içli B, Christinat N, Tönnemann J, Schüttler C, Scopelliti R, Severin K. Synthesis of Molecular Nanostructures by Multicomponent Condensation Reactions in a Ball Mill. J Am Chem Soc 2009; 131:3154-5. [DOI: 10.1021/ja809279s] [Citation(s) in RCA: 159] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Burçak Içli
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Nicolas Christinat
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Justus Tönnemann
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Christian Schüttler
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Kay Severin
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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25
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Severin K. Boronic acids as building blocks for molecular nanostructures and polymeric materials. Dalton Trans 2009:5254-64. [DOI: 10.1039/b902849h] [Citation(s) in RCA: 197] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Galbraith E, Kelly AM, Fossey JS, Kociok-Köhn G, Davidson MG, Bull SD, James TD. Dynamic covalent self-assembled macrocycles prepared from 2-formyl-aryl-boronic acids and 1,2-amino alcohols. NEW J CHEM 2009. [DOI: 10.1039/b815138e] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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28
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Salazar-Mendoza D, Guerrero-Alvarez J, Höpfl H. 3-Pyridineboronic acid → boroxine → pentadecanuclear boron cage → 3D molecular network: a sequence based on two levels of self-complementary self-assembly. Chem Commun (Camb) 2008:6543-5. [DOI: 10.1039/b814918f] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Voloshin YZ, Varzatskii OA, Belov AS, Bubnov YN. Cage complexes as a molecular “scaffold” for assembling of polyfunctional and multicentered systems: Synthesis of ribbed-functionalized dopamine-containing iron(II) clathrochelate and its properties as a receptor for boric acid. Russ Chem Bull 2006. [DOI: 10.1007/s11172-006-0387-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Niu W, O'Sullivan C, Rambo BM, Smith MD, Lavigne JJ. Self-repairing polymers: poly(dioxaborolane)s containing trigonal planar boron. Chem Commun (Camb) 2005:4342-4. [PMID: 16113742 DOI: 10.1039/b504634c] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The molecular weight of poly(dioxaborolane)s can be controlled during the polymerization reaction or through post-polymerization processing in such a manner that hydrolytic damage to these materials may be repaired, thereby regenerating the polymer.
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Affiliation(s)
- Weijun Niu
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, USA
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31
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Vargas G, Hernández I, Höpfl H, Ochoa ME, Castillo D, Farfán N, Santillan R, Gómez E. Preparation and Structural Characterization of Three Types of Homo- and Heterotrinuclear Boron Complexes: Salen{[B−O−B][O2BOH]}, Salen{[B−O−B][O2BPh]}, and Salen{[B−O−B][O2P(O)Ph]}. Inorg Chem 2004; 43:8490-500. [PMID: 15606198 DOI: 10.1021/ic048862e] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Three types of homo- and heterotrinuclear boron complexes have been obtained in moderate to good yields from reactions of salen-type ligands with boric acid and combinations of boric acid with phenylboronic and phenylphosphonic acid. The products are air-stable and have relatively high melting points (>290 degrees C) but are poorly soluble or insoluble in common organic solvents. They have been characterized as far as possible by elemental analysis, mass spectrometry, IR, (1)H, (11)B, and (31)P NMR spectroscopy, and X-ray crystallography. Furthermore, theoretical calculations have been performed for representative examples to permit a complete comparison of the different structure types. A detailed analysis of the molecular structures showed that the complexes are constructed around a central B(3)O(3) or B(2)PO(3) ring. The salen ligands are attached to two boron atoms of these rings, which have therefore tetrahedral coordination geometries. The complexes contain seven- and eight-membered heterocycles of the B(2)C(n)ON(2) (n = 2, 3) type with chair or twisted-chair and boat-chair or chair-chair conformations, respectively. In the homotrinuclear complexes one of the three boron atoms is three-coordinate and can therefore still act as Lewis acid, thus making these products interesting for catalytic applications, e.g. in asymmetric synthesis. Depending on the substitutents attached to the boron atoms, these complexes show a relationship with either trimetaboric acid, boroxine, or the tetraborate dianion found in Borax.
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Affiliation(s)
- Gabriela Vargas
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, C.P. 62210 Cuernavaca, México
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Barnea E, Andrea T, Kapon M, Eisen MS. Formation of Inclusion Organoactinide Complexes with Boron-Containing Macrocycles. J Am Chem Soc 2004; 126:5066-7. [PMID: 15099079 DOI: 10.1021/ja0498843] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reaction of the organoactinide complexes (C5Me5)2AnMe2 (An = Th, U) with catecholborane yields an inclusion complex where the actinide is encapsulated inside a 15-membered, hexaoxo, trianionic macrocycle built from alternating catechol and catecholborate fragments. In the presence of LiOH, a dimer of two encapsulated actinide macrocycles is formed. The X-ray molecular structure for all the complexes is presented.
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Affiliation(s)
- Eyal Barnea
- Department of Chemistry and Institute of Catalysis Science and Technology, Technion-Israel Institute of Technology, Haifa
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New boronates prepared from 2,4-pentanedione derived ligands of the NO2 and N2O2 type – comparison to the complexes obtained from the corresponding salicylaldehyde derivatives. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2003.11.032] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Barba V, Höpfl H, Farfán N, Santillan R, Beltran HI, Zamudio-Rivera LS. Boron–nitrogen macrocycles: a new generation of calix[3]arenes. Chem Commun (Camb) 2004:2834-5. [PMID: 15599430 DOI: 10.1039/b410148k] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The simple condensation reaction of 3,5-di-tert-butyl salicylaldehyde and 3-aminophenylboronic acid leads to a trimeric macrocyclic compound. The ability of this molecule to include small organic molecules was in a first approximation analyzed by (1)H NMR spectroscopy and X-ray crystallography.
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Affiliation(s)
- Victor Barba
- Centro de Investigaciones Quimicas, UAEM, Av. Univ. 1001, C. P. 62210 Cuernavaca, Mexico.
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García-Zarracino R, Ramos-Quiñones J, Höpfl H. Self-assembly of dialkyltin(IV) moieties and aromatic dicarboxylates to complexes with a polymeric or a discrete trinuclear macrocyclic structure in the solid state and a mixture of fast interchanging cyclooligomeric structures in solution. Inorg Chem 2003; 42:3835-45. [PMID: 12793820 DOI: 10.1021/ic026270v] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
It is well-known that the structures of trialkyltin(IV) carboxylates can be either monomeric, polymeric, or cyclooligomeric in the solid state. In contrast, all dialkyltin(IV) dicarboxylates characterized so far in the solid state have monomeric or polymeric structures, however, for some cases it has been proposed that their solution-state structure is cyclooligomeric. In order to generate more information on this subject, dimethyl- and di-n-butyltin(IV) complexes with phthalic and isophthalic acid have been prepared and analyzed both in solution and in the solid state. The solid-state structures of the two dialkyltin(IV) phthalates examined herein contain polymeric molecular chains, however, with supramolecular Sn.O' interactions, which result in the generation of cyclooligomeric units. This provides evidence for the presence of discrete cyclooligomeric structures in solution, which are involved in fast dynamic exchange equilibria as evidenced by (1)H, (13)C, and (119)Sn NMR spectroscopy. In the case of the two dialkyltin(IV) isophthalate complexes studied herein (R = Me, n-Bu), only the di-n-butyltin derivative is soluble and NMR spectroscopy as well as FAB(+) spectrometry indicates the formation of cyclic dinuclear, trinuclear, and/or tetranuclear species in solution, which may be involved also in fast dynamic exchange equilibria. In the solid state, however, discrete cyclotrinuclear units can be identified, in which the 24-membered macrocyclic cavity is almost completely planar, having six oxygen atoms directed into its interior and six Sn-n-butyl groups approximately perpendicular to the molecular plane. The diameter of the cyclic cavity can be described by the transannular O.O distances that vary from 7.68 to 7.84 A, being large enough for the introduction of linear alkyl groups. This can be demonstrated by the supramolecular structure of this compound, which contains a new type of bis[2]pseudorotaxane formed between two molecules through mutual threading via two of the Sn-butyl groups. Such a supramolecular entity has been unknown so far, since the usual composition of bis[2]pseudorotaxanes is the trimolecular combination of a macrocyclic ring system with two threads.
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Affiliation(s)
- Reyes García-Zarracino
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, C.P. 62210 Cuernavaca, Mexico
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