All posts by MJB

Michael J. Bojdys joined the Charles University in Prague (Czech Republic) in 2014 as an Assistant Professor. His current research interest lies in the field of functional nanomaterials for semiconductor applications, gas storage and catalysis. Previously, Michael was holder of a research fellowship of the German Academic Exchange Service (DAAD) at the Technische Universität Berlin (Germany). He worked as a postdoctoral researcher at the University of Liverpool (UK) from 2010 to 2013. He completed his PhD thesis between 2006 and 2009 "On new allotropes and nanostructures of carbon nitrides" at the Max Planck Institute of Colloids and Interfaces in Potsdam (Germany). In 2006 he graduated as Master of Natural Sciences at the University of Cambridge (UK).

Bulk and Adsorbed Monolayer Phase Behavior of Binary Mixtures of Undecanoic Acid and Undecylamine: Catanionic Monolayers

Sun, C.; Bojdys, M. J.; Clarke,* S. M.; Harper, L. D.; Jefferson, A. Langmuir, 2011, 27, 3626-3637.

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Differential scanning calorimetry (DSC) and X-ray powder diffraction (PXRD) have been used to determine the phase behavior of the binary mixtures of undecanoic acid (A) and undecylamine (B) in the bulk. In addition, we report DSC data that indicates very similar behavior for the solid monolayers of these materials adsorbed on the surface of graphite. The two species are found to form a series of stoichiometric complexes of the type AB, A2B, and A3B on the acid rich side of the phase diagram. Interestingly, no similar series of complexes is evident on the amine rich side. As a result of this complexation, the solid monolayers of the binary mixtures exhibit a very pronounced enhancement in stability relative to the pure adsorbates.

DOI: 10.1021/la1048198 [Download]

Reprinted with permission from Sun, C.; Bojdys, M. J.; Clarke, S. M.; Harper, L. D.; Jefferson, A. Langmuir, 2011, 27, 3626-3637. Copyright 2011 American Chemical Society.

Ionothermal Route to Layered Two-Dimensional Polymer-Frameworks Based on Heptazine Linkers

Bojdys,* M. J.; Wohlgemuth, S. A.; Thomas, A.; Antonietti, M. Macromolecules 2010, 43, 6639-6645.

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Layered two-dimensional polymer frameworks were formed on the basis of the thermally-induced auto-condensation mechanism of heptazine (C6N7) in a salt melt of lithium bromide and potassium bromide from three different molecular building blocks. The backbone of the materials is based on strong covalent bonds (C-C, C-N) resulting in high thermal stabilities (< 600 °C) and low bulk density, but no accessible pores.

DOI: 10.1021/ma101008c [Download]

Reprinted with permission from Bojdys, M. J.; Wohlgemuth, S. A.; Thomas, A.; Antonietti, M. Macromolecules 2010, 43, 6639-6645. Copyright 2010 American Chemical Society.

Rational Extension of the Family of Layered, Covalent, Triazine-Based Frameworks with Regular Porosity

Bojdys,* M. J.; Jeromenok, J.; Thomas, A.; Antonietti, M. Advanced Materials 2010, 22, 2202-2205.

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A layered, covalent, triazine-based framework (CTF) was synthesized via the condensation of 2,6-naphthalenedicarbonitrile under ionothermal conditions. The polytrimerization of this bi functional carbon nitrile in zinc chloride at lower temperatures yields a well-ordered, close-packed framework. At elevated temperatures an amorphous, yet porous solid is obtained, which shows remarkable thermal stability (640 °C) and a high surface area (2255 m2 g−1 and 1.51 cm3 g−1).

DOI: 10.1002/adma.200903436 [Download]

This is the pre-peer reviewed version of the following article: Bojdys, M. J.; Jeromenok, J.; Thomas, A.; Antonietti, M. Advanced Materials 2010, 22, 2202-2205, which has been published in final form at [DOI: 10.1002/adma.200903436].

Ionothermal Synthesis of Crystalline, Condensed, Graphitic Carbon Nitride

Bojdys, M. J.; Muller, J. O.; Antonietti, M.; Thomas,* A. Chemistry-A European Journal 2008, 14, 8177-8182.

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Herein we report the synthesis of a crystalline graphitic carbon nitride, or g-C3N4, obtained from the temperature-induced condensation of dicyandiamide (NH2C(=NH)NHCN) by using a salt melt of lithium chloride and potassium chloride as the solvent. The proposed crystal structure of this g-C3N4 species is based on sheets of hexagonally arranged s-heptazine (C6N7) units that are held together by covalent bonds between C and N atoms which are stacked in a graphitic, staggered fashion, as corroborated by powder X-ray diffractometry and high-resolution transmission electron microscopy.

DOI: 10.1002/chem.200800190 [Download]

This is the pre-peer reviewed version of the following article: Bojdys, M. J.; Muller, J. O.; Antonietti, M.; Thomas, A. Chemistry-A European Journal 2008, 14, 8177-8182, which has been published in final form at [DOI: 10.1002/chem.200800190].