摘要:

Inorganic extended lattice structures can be incorporated into Langmuir—Blodgett (LB) films. The inorganic component not only adds lattice energy to the films, but also provides an opportunity to introduce electronic or magnetic ordering phenomena to the LB assemblies. In this Comment, LB films are described that are based on known divalent and tetravalent metal phosphonate inorganic layered solids. The LB film structures and properties are compared to the known solid-state metal phosphonates after which they are modeled. One of the films, manganese octadecylphosphonate, undergoes a magnetic ordering transition to a “weak ferromagnetic” state. It is the first example of a magnetic LB film, demonstrating how the extended lattice structure can be used to introduce new physical properties into LB films. Once the inorganic extended lattice structure is included, the possibility now exists for developing mixed organic/inorganic dual network LB films, where both the organic and inorganic networks add function.

ISSN:0260-3594    

DOI:10.1080/02603599708032733

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Various uses of organolanthanide complexes in materials science are reviewed. The most advanced application involves doping of III—V semiconductors using substituted tris(cyclopentadienyl)lanthanide complexes as precursors. Major efforts have been made to develop volatile liquid organolanthanides by introducing suitable substituents on the cyclopentadienyl rings. Lanthanide organometallics have also been demonstrated to be useful MOCVD precursors for the deposition of lanthanide oxide thin films.

ISSN:0260-3594    

DOI:10.1080/02603599708032734

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

Organometallic crystal architectures have been examined in terms of extramolecular interactions between molecules and ions. Attention has been focused on the modelling of van der Waals crystals by means of empirical atom—atom pairwise potential energy calculations and on the possibility of generating theoretical crystal structures to be compared with those experimentally determined. Examples of crystal generation techniques for simple binary carbonyls have been reviewed. It has also been shown that organometallic crystal enginnering takes advantage of both the great structural flexibility of organometallic molecules as well as of the possibility of linking ligands via hydrogen bonds. The importance of charge assisted. C—H—-O hydrogen bonds in the construction of supramolecular aggregates is stressed.

ISSN:0260-3594    

DOI:10.1080/02603599708032735

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0260-3594    

DOI:10.1080/02603599708032732

出版商:Taylor & Francis Group    

年代:1997

数据来源: Taylor