Room-Temperature Columnar Mesophases in Triazine-Gold Thiolate Metal-Organic Supramolecular Aggregates

Supramolecular mono‐ and dinuclear liquid‐crystalline gold(I) aggregates have been synthesized by means of hydrogen bond interactions of 2,4,6‐triarylamino‐1,3,5‐triazine with thiolate moities of gold metalloacids [Au(PR3)(SC6H4COOH)] or [μ‐(binap){Au(SC6H4COOH)}2], in 1:1 and 2:1 molar ratio, respe...

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Bibliographic Details
Published in:Chemistry : a European journal 2013-05, Vol.19 (19), p.5988-5995
Main Authors: Domínguez, Cristina, Heinrich, Benoît, Donnio, Bertrand, Coco, Silverio, Espinet, Pablo
Format: Article
Language:English
Subjects:
Aggregates
Chemistry
columnar phases
Fragments
Gold
Hydrogen bonding
Hydrogen bonds
liquid crystals
Mesophase
Stacking
Strategy
triazine
Wedges
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Summary:Supramolecular mono‐ and dinuclear liquid‐crystalline gold(I) aggregates have been synthesized by means of hydrogen bond interactions of 2,4,6‐triarylamino‐1,3,5‐triazine with thiolate moities of gold metalloacids [Au(PR3)(SC6H4COOH)] or [μ‐(binap){Au(SC6H4COOH)}2], in 1:1 and 2:1 molar ratio, respectively. All of the supramolecular aggregates display a stable columnar hexagonal mesophase (Colh) at room‐temperature. The supramolecular arrangement within the columns consists of the one‐dimensional stacking of triazine units, with the core of the attached metallic thioacid fragments acting as the fourth branch. The phosphine‐containing moieties of the metallic thioacid protrude out in the aliphatic continuum. These complexes do not show metallophilic interactions, but this strategy appears very promising for the future design of room‐temperature LC mesophases containing interacting metallic fragments. Golden get‐together: Mono‐ and dinuclear aggregates form by hydrogen bonding between triazine units (see figure; green) and thiolate groups on aryl phosphine–gold(I) metalloacids (blue). These aggregates form stable columnar mesophases at room temperature. The metal fragments act as a wedge between the columnar stacking of triazine discogens.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201204256