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Supramolecular Cage Complexes
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Supramolecular Cage Complexes

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (30 November 2013) | Viewed by 23199

Special Issue Editor

Prof. Dr. Bruno Therrien

E-Mail Website
Guest Editor
Institut de Chimie, Université de Neuchâtel, Avenue de Bellevaux 51, CH-2000 Neuchâtel, Switzerland
Interests: metalla-assemblies; supramolecular chemistry; host-guest chemistry; metal-based drugs; organometallic chemistry; X-ray crystallography
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleague,

Supramolecular cage complexes are entering a new era in which applications are becoming the highlights of publications while the structural aspects of the metalla-assemblies are relegated to basic characterizations. Known applications for supramolecular cage complexes include sensing, cavity controlled catalysis, host-guest-chemistry, drug delivery, and soon other applications will appear. Therefore, it is with great pleasure that I’m inviting you to submit your recent contributions in the field of supramolecular cage complexes for this special issue of Materials. Review, concept and research articles are welcomed for this special issue: The overall goal being to provide to the readers an overview of the field with an emphasis on the actual and future applications of supramolecular cage complexes.

Prof. Dr. Bruno Therrien
Guest Editor

Manuscript Submission Information

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Keywords

  • coordination chemistry
  • metalla-assemblies
  • host-guest chemistry
  • carceplex
  • bioinorganic
  • encapsulation
  • sensing
  • metalla-cycles

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Published Papers (3 papers)

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Research

876 KiB  
Article
A Self-Assembled Electro-Active M8L4 Cage Based on Tetrathiafulvalene Ligands
by Sébastien Goeb, Sébastien Bivaud, Vincent Croué, Vaishali Vajpayee, Magali Allain and Marc Sallé
Materials 2014, 7(1), 611-622; https://doi.org/10.3390/ma7010611 - 22 Jan 2014
Cited by 30 | Viewed by 7610
Abstract
Two self-assembled redox-active cages are presented. They are obtained by coordination-driven self-assembly of a tetra-pyridile tetrathiafulvalene ligand with cis-M(dppf)(OTf)2 (M = Pd or Pt; dppf = 1,1′-bis(diphenylphosphino)ferrocene; OTf = trifluoromethane-sulfonate) complexes. Both species are fully characterized and are constituted of 12 [...] Read more.
Two self-assembled redox-active cages are presented. They are obtained by coordination-driven self-assembly of a tetra-pyridile tetrathiafulvalene ligand with cis-M(dppf)(OTf)2 (M = Pd or Pt; dppf = 1,1′-bis(diphenylphosphino)ferrocene; OTf = trifluoromethane-sulfonate) complexes. Both species are fully characterized and are constituted of 12 electro-active subunits that can be reversibly oxidized. Full article
(This article belongs to the Special Issue Supramolecular Cage Complexes)
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950 KiB  
Article
Self-Assembled M2L4 Nanocapsules: Synthesis, Structure and Host-Guest Recognition Toward Square Planar Metal Complexes
by Christophe Desmarets, Thierry Ducarre, Marie Noelle Rager, Geoffrey Gontard and Hani Amouri
Materials 2014, 7(1), 287-301; https://doi.org/10.3390/ma7010287 - 9 Jan 2014
Cited by 29 | Viewed by 8025
Abstract
Metallosupramolecular cages of the general formulas [M2(L)4][X]4 can be self-assembled in good yields, where M = Pd, X = NO3, L = L1 (1a); M = Pd, X = OTf, L = L [...] Read more.
Metallosupramolecular cages of the general formulas [M2(L)4][X]4 can be self-assembled in good yields, where M = Pd, X = NO3, L = L1 (1a); M = Pd, X = OTf, L = L1 (1b); M = Pt, X = OTf, L = L1 (2); M = Pd, X = OTf, L = L2 (3); L1 = 1,3-bis(pyridin-3-ylethynyl)-5-methoxybenzene; and L2 = 2,6-(pyridin-3-ylethynyl)- 4-methoxyaniline, respectively. These cages have been fully characterized using 1H, 13C NMR, elemental analysis, IR spectroscopy, and electrospray mass spectrometry. Additionally the molecular structure of [Pd2(L1)4][OTf]4 (1b) was confirmed using single crystal X-ray diffraction. The capacity of central cavities of M2L4 cages to accommodate square planar metal complexes was investigated. In particular, the tetracationic cage [Pd2(L2)4][OTf]4 (3) was found to encapsulate the anionic metal complex [PtCl4]2− through electrostatic interactions and also via hydrogen bonding with the amino groups of the bridging ligand displayed by this nanocage. Full article
(This article belongs to the Special Issue Supramolecular Cage Complexes)
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766 KiB  
Article
Synthesis, Molecular Structure and Cytotoxicity of Molecular Materials Based on Water Soluble Half-Sandwich Rh(III) and Ir(III) Tetranuclear Metalla-Cycles
by Gajendra Gupta, Benjamin S. Murray, Paul J. Dyson and Bruno Therrien
Materials 2013, 6(11), 5352-5366; https://doi.org/10.3390/ma6115352 - 20 Nov 2013
Cited by 25 | Viewed by 6848
Abstract
The neutral dinuclear complexes [(η5-C5Me5)2Rh2(μ-dhnq)Cl2] (1) and [(η5-C5Me5)2Ir2(μ-dhnq)Cl2] (2) (dhnqH2 = 5,8-dihydroxy-1,4-naphthoquinone) were obtained [...] Read more.
The neutral dinuclear complexes [(η5-C5Me5)2Rh2(μ-dhnq)Cl2] (1) and [(η5-C5Me5)2Ir2(μ-dhnq)Cl2] (2) (dhnqH2 = 5,8-dihydroxy-1,4-naphthoquinone) were obtained from the reaction of [(η5-C5Me5)M(μ-Cl)Cl]2 (M = Rh, Ir) with dhnqH2 in the presence of CH3COONa. Treatment of 1 or 2 in methanol with linear ditopic ligands L (L = pyrazine, 4,4′-bipyridine or 1,2-bis(4-pyridyl)ethylene), in the presence of AgCF3SO3, affords the corresponding tetranuclear metalla-rectangles [(η5-C5Me5)4M4(μ-dhnq)2(μ-L)2]4+ (L = pyrazine, M = Rh, 3; M = Ir, 4; L = 4,4′-bipyridine, M = Rh, 5; M = Ir, 6; L = 1,2-bis(4-pyridyl)ethylene, M = Rh, 7; M = Ir, 8). All complexes were isolated as their triflate salts and were fully characterized by infrared, 1H and 13C NMR spectroscopy, and some representative complexes by single-crystal X-ray structure analysis. The X-ray structures of 3, 5 and 6 confirm the formation of the tetranuclear metalla-cycles, and suggest that complexes 5 and 6 possess a cavity of sufficient size to encapsulate small guest molecules. In addition, the antiproliferative activity of the metalla-cycles 3–8 was evaluated against the human ovarian A2780 (cisplatin sensitive) and A2780cisR (cisplatin resistant) cancer cell lines and on non-tumorigenic human embryonic kidney HEK293 cells. All cationic tetranuclear metalla-rectangles were found to be highly cytotoxic, with IC50 values in the low micromolar range. Full article
(This article belongs to the Special Issue Supramolecular Cage Complexes)
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