Introducing Bulky Functional Lanthanide Cores into Thermotropic Metallomesogens: A Bottom-Up Approach
Basic thermodynamic considerations are used to rationalize the formation of thermotropic mesophases incorporating aromatic ligands for trivalent lanthanide metal ions (Ln). Standard flat and bent molecular interfaces, separating the central binding unit from the lateral, flexible alkoxy chains, prov...
Saved in:
Published in | Advanced functional materials Vol. 16; no. 2; pp. 157 - 168 |
---|---|
Main Authors | , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
19.01.2006
WILEY‐VCH Verlag Wiley |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Basic thermodynamic considerations are used to rationalize the formation of thermotropic mesophases incorporating aromatic ligands for trivalent lanthanide metal ions (Ln). Standard flat and bent molecular interfaces, separating the central binding unit from the lateral, flexible alkoxy chains, provide programmed lamellar and columnar organization in the mesophases, which are removed upon complexation to Ln(NO3)3 and Ln(CF3CO2)3. Only significantly curved aromatic/aliphatic interfaces, found in polycatenar ligands, are able to overcome the considerable perturbations of the intermolecular interactions produced by the introduction of the bulky metallic core. A rich mesomorphism results, which can be tuned by a judicious control of the metallic coordination sphere. The exploitation of specific, metal‐centered luminescence for probing phase transitions and microscopic environments in mesophases is also discussed, as is the use of ionic liquids for producing tunable luminescent mesophases.
Judicious tailoring of molecular shapes and interfaces in lanthanide complexes (see Figure) can produce rational control of the thermodynamic parameters responsible for the formation of thermotropic liquid‐crystalline phases with predetermined macroscopic organizations. These complexes and their specific metal‐centered luminescence can be exploited for probing phase transitions and microscopic environments in mesophases. |
---|---|
Bibliography: | Financial support from the Swiss National Science Foundation National Research Program 47 "Supramolecular Functional Materials" is gratefully acknowledged. istex:B562AE6F58EF698FD6395D7472C8E9B12264A494 ArticleID:ADFM200500195 ark:/67375/WNG-SN30LX8C-7 Financial support from the Swiss National Science Foundation National Research Program 47 “Supramolecular Functional Materials” is gratefully acknowledged. ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1616-301X 1616-3028 |
DOI: | 10.1002/adfm.200500195 |