Building molecular frameworks with tailored pore structures

Plaut, David J.; Holman, K. Travis; Pivovar, A. M.; Ward, Michael D.

doi:10.1002/1099-1395(200012)13:12<858::aid-poc318>3.0.co;2-s

Cited by 21 publications

(11 citation statements)

References 40 publications

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“…6 However, the past decade has seen major advances in the preparation of nanoporous materials using molecular components. 7,8 For example, great interest has been generated by crystalline organic-inorganic hybrid materials, such as the Metal-Organic Frameworks (MOFs), also called Porous Coordination Polymers (PCPs). [9][10][11][12][13][14][15] Nanoporous Molecular Crystals (NMCs) are composed of discrete molecules between which there are only non-covalent interactions-i.e.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous molecular crystals

2010

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Nanoporous Molecular Crystals (NMCs) are nanoporous materials composed of discrete molecules between which there are only non-covalent interactions-i.e. they do not possess an extended framework composed of covalent or coordination bonds. They are formed from removing guest molecules from inclusion compounds (ICs) a process that for most ICs usually results in the collapse of the open structure of the crystals but in the case of NMCs the packing of the host molecules is retained and nanoporosity obtained. In recent years a number of NMCs have been confirmed by the technique of gas adsorption and these materials are surveyed in this feature article. In addition, the reasons for stability of these crystals are discussed. It is the author's belief that many more ICs, the structures of which are readily obtainable from the Cambridge Structural Database (CSD), may act as precursors to NMCs.

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Section: Introductionmentioning

confidence: 99%

Nanoporous molecular crystals

2010

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“…27 Notably, Ward and co-workers have demonstrated that guanidinium sulfonates readily act as binaryhosts for molecular inclusion. [29][30][31] In these systems the host structure is based on a common persistent two-dimensional hydrogen-bonded network structure formed between guanidinium and sulfonate ions. 32 The layered nature of this self-assembled structure permits structural variability in the third dimension and, consequently, guanidinium sulfonate hosts are able to adapt to large variations in guest size and shape.…”

Section: Introductionmentioning

confidence: 99%

Isostructural organic binary-host frameworks with tuneable and diversely decorated inclusion cavities

et al. 2012

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The search for materials capable of storing small molecular species is experiencing a shift from solids with permanent porosity towards organic materials capable of the uptake and release of lowmolecular-weight guests. We demonstrate that a solid mixture of the pharmaceutical compound lamotrigine with a range of saturated and unsaturated 1,4-butanedicarboxylic acids, when in combination with a third molecule, can result in the formation of a family of isostructural materials involving a structurally persistent binary-host framework based on a hydrogen-bonded molecular salt of lamotrigine and the acid. A systematic study, based on mechanochemical screening, has revealed a remarkable robustness to subtle changes in the chemical functionality of the acid in that at least 12 different acids can be used in combination with lamotrigine to generate isostructural binary-host frameworks. Such robust isostructurality results in the important attribute that the shape, size and surface chemistry of the inclusion cavities can be fine-tuned by systematic variation of the substituents on the dicarboxylic acid.

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“…1,2 For example, it has been reported the formation of supramolecular building blocks with tailored pore structures by Plaud et al to generate predictable and robust structures for specific applications. 3 Moreover, recent research work has been oriented to the formation and characterization of molecular-material thin films. 4 For instance, the use of the chemical vapor deposition to grow thin films of molecular conductors such as (TTF)(TCNQ) (TTF= tetrathiafulvalene, TCNQ = tetracyanoquinodimethane) has been reported.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and atomic force microscopy investigations of new materials from N-trifluoromethanesulfonyl-1-azahexa-1,3,5-trienes derivatives

Rivera¹,

Álvarez-Toledano²,

Moreno³

et al. 2005

J. Braz. Chem. Soc.

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Filmes finos foram crescidos sobre a superfície de elétrodos de grafito pirolizado altamente orientado a partir de precursores p-doadores utilizando a técnica cíclica de voltametria cíclica e eletroquímica-microscopia de força atômica. Os resultados indicam que é possível a formação de novos compostos chamados materiais moleculares, estes são formados pelo acoplamento de espécies N-trifluormetanosulfonil-1-aza-hexa-1,3,5-trieno eletro-oxidadas e o anion [Cr(C 2 O 4 ) 3 ] 3-. Diferentes técnicas foram empregadas para caracterizar a morfologia e composição dos filmes formados. Os resultados indicam que os materiais novos exibiram uma resposta eletroquímica particular e uma textura diferente dependendo da composição química dos materiais de partida.Thin films have been created on the surface of highly oriented pyrolytic graphite electrodes from chemically synthesized -donor species by using the cyclic voltammetry technique and in situ electrochemistry-atomic force microscopy. Results indicate that it is possible to form new compounds called molecular materials from the coupling of electro-oxidized N-trifluoromethanesulfonyl-1-azahexa-1,3,5-triene species and a [Cr(C 2 O 4 ) 3 ] 3-anion. Different techniques such as AFM, SEM and EDS were employed to characterize the films morphology and composition. Results indicate that the new materials exhibited a particular electrochemical response and a different film texture depending on the chemical composition of the starting compounds. Keywords: thin films, electrodeposition, in situ AFM IntroductionOver the last few years, there have been an increasing number of reports regarding the formation of molecular materials (MMs) with electronic or opto electronic properties based on organic and organometallic derivatives.1,2 For example, it has been reported the formation of supramolecular building blocks with tailored pore structures by Plaud et al. to generate predictable and robust structures for specific applications.3 Moreover, recent research work has been oriented to the formation and characterization of molecular-material thin films. 4 For instance, the use of the chemical vapor deposition to grow thin films of molecular conductors such as (TTF)(TCNQ) (TTF= tetrathiafulvalene, TCNQ = tetracyanoquinodimethane) has been reported. [5][6][7][8] It has been observed, that a regular stacking of molecules such as those found in MMs allows the formation of semiconducting, conducting or superconducting thin films. These thin films exhibit in general preferential directions for electrical conductivity. The electrical conductivity of MMs is associated with an extensive delocalization of electrons that depends on their 317 Electrochemical and Atomic Force Microscopy Investigations of New Materials Vol. 16, No. 3A, 2005 planarity and the orbital overlap extension between their molecular units. N-Trifluoromethanesulfonyl-1-azahexa-1,3,5-trienes (TFSAT) compounds, which are highly functionalized pentametines, have been previously studied due to its interesting physical and chemical p...

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Building molecular frameworks with tailored pore structures

Cited by 21 publications

References 40 publications

Nanoporous molecular crystals

Nanoporous molecular crystals

Isostructural organic binary-host frameworks with tuneable and diversely decorated inclusion cavities

Electrochemical and atomic force microscopy investigations of new materials from N-trifluoromethanesulfonyl-1-azahexa-1,3,5-trienes derivatives

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