"Crystal Engineering" Based on Two-Dimensional Molecular Assemblies. Relation between Chemical Structure and Molecular Orientation in Cast Bilayer Films

Langmuir ◽  
1995 ◽  
Vol 11 (3) ◽  
pp. 969-976 ◽  
Author(s):  
Masatsugu Shimomura ◽  
Satoshi Aiba ◽  
Nobuyoshi Tajima ◽  
Noriko Inoue ◽  
Kenji Okuyama
Keyword(s):  
Crystal Engineering ◽  
Molecular Orientation ◽  
Chemical Structure ◽  
Two Dimensional ◽  
Molecular Assemblies ◽  
Bilayer Films

Template mediated crystal engineering

1994 ◽  
Vol 52 ◽  
pp. 480-481
Author(s):  
Brigid R. Heywood ◽  
S. Champ
Keyword(s):  
Crystal Engineering ◽  
Electrostatic Interactions ◽  
Alkyl Chain ◽  
Crystallographic Axis ◽  
Two Dimensional ◽  
Engineering Process ◽  
Solution Interface ◽  
Extensive Program ◽  
Geometric Homology ◽  
Long Alkyl Chain

Recent work on the crystallisation of inorganic crystals under compressed monomolecular surfactant films has shown that two dimensional templates can be used to promote the oriented nucleation of solids. When a suitable long alkyl chain surfactant is cast on the crystallisation media a monodispersied population of crystals forms exclusively at the monolayer/solution interface. Each crystal is aligned with a specific crystallographic axis perpendicular to the plane of the monolayer suggesting that nucleation is facilitated by recognition events between the nascent inorganic solid and the organic template.For example, monolayers of the long alkyl chain surfactant, stearic acid will promote the oriented nucleation of the calcium carbonate polymorph, calcite, on the (100) face, whereas compressed monolayers of n-eicosyl sulphate will induce calcite nucleation on the (001) face, (Figure 1 & 2). An extensive program of research has confirmed the general principle that molecular recognition events at the interface (including electrostatic interactions, geometric homology, stereochemical complementarity) can be used to promote the crystal engineering process.

A threefold interpenetrated two-dimensional zinc(II) supramolecular architecture based on 3-nitrobenzoic acid and 4,4′-bipyridine

2016 ◽  
Vol 72 (2) ◽  
pp. 128-132 ◽  
Author(s):  
Long Tang ◽  
Ji-Jiang Wang ◽  
Feng Fu ◽  
Sheng-Wen Wang ◽  
Qi-Rui Liu
Keyword(s):  
Coordination Polymers ◽  
Crystal Engineering ◽  
Critical Factor ◽  
Building Blocks ◽  
Zigzag Chain ◽  
Great Success ◽  
Supramolecular Architecture ◽  
Two Dimensional ◽  
Hydrothermal Conditions ◽  
Nitrobenzoic Acid

With regard to crystal engineering, building block or modular assembly methodologies have shown great success in the design and construction of metal–organic coordination polymers. The critical factor for the construction of coordination polymers is the rational choice of the organic building blocks and the metal centre. The reaction of Zn(OAc)2·2H2O (OAc is acetate) with 3-nitrobenzoic acid (HNBA) and 4,4′-bipyridine (4,4′-bipy) under hydrothermal conditions produced a two-dimensional zinc(II) supramolecular architecture,catena-poly[[bis(3-nitrobenzoato-κ2O,O′)zinc(II)]-μ-4,4′-bipyridine-κ2N:N′], [Zn(C7H4NO4)2(C10H8N2)]nor [Zn(NBA)2(4,4′-bipy)]n, which was characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis and single-crystal X-ray diffraction analysis. The ZnIIions are connected by the 4,4′-bipy ligands to form a one-dimensional zigzag chain and the chains are decorated with anionic NBA ligands which interact further through aromatic π–π stacking interactions, expanding the structure into a threefold interpenetrated two-dimensional supramolecular architecture. The solid-state fluorescence analysis indicates a slight blue shift compared with pure 4,4′-bipyridine and HNBA.

PTCDA Films Deposited by Ionized Beam Method

1993 ◽  
Vol 316 ◽  
Author(s):  
Hiroaki Usui ◽  
Kiyoshi Kashihara ◽  
Kuniaki Tanaka ◽  
Seizo Miyata
Keyword(s):  
Thin Films ◽  
Molecular Orientation ◽  
Chemical Structure ◽  
Chemical Change ◽  
The Other ◽  
Ion Acceleration ◽  
Ionization Condition ◽  
Other Hand ◽  
Beam Method

ABSTRACTThin films of 3,4,9,10-perylenetetracarboxylic-dianhydride (PTCDA) were deposited by an ionized beam method. The molecular orientation and chemical structure of the films were studied in connection with ionization and ion acceleration conditions. At a low ionization condition, the molecules are oriented in parallel with the substrate, and the crystallinity was improved by an appropriate ion acceleration. At higher ionization conditions, on the other hand, ion acceleration resulted in a loss of crystallinity. Deposited molecules undergo chemical change in such a condition, leading to dissociation of dianhydride groups.

On the formation of ordered two-dimensional molecular assemblies

Langmuir ◽  
1992 ◽  
Vol 8 (3) ◽  
pp. 894-897 ◽  
Author(s):  
Abraham Ulman ◽  
Raymond P. Scaringe
Keyword(s):  
Two Dimensional ◽  
Molecular Assemblies

Two-dimensional rigid molecular network with elastic boundaries for constructing hybrid molecular assemblies

2009 ◽  
Vol 19 (10) ◽  
pp. 1490 ◽  
Author(s):  
Xiaojing Ma ◽  
Yibao Li ◽  
Xiaohui Qiu ◽  
Keqing Zhao ◽  
Yanlian Yang ◽  
...  
Keyword(s):  
Molecular Network ◽  
Two Dimensional ◽  
Molecular Assemblies

Tailored charge transfer complex based on two-dimensional molecular assemblies

1994 ◽  
Vol 1 (1) ◽  
pp. 33-38 ◽  
Author(s):  
M. Shimomura ◽  
S. Aiba ◽  
S. Oguma ◽  
M. Oguchi ◽  
M. Matsute ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Transfer Complex ◽  
Two Dimensional ◽  
Molecular Assemblies
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