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Special Issue "Supramolecular Cage Complexes"

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

Deadline for manuscript submissions: closed (30 November 2013)

Special Issue Editor

Guest Editor
Prof. Dr. Bruno Therrien (Website)

Institute of Chemistry Avenue de Bellevaux 51 University of Neuchatel CH-2000 Neuchatel Switzerland

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

Submission

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. Papers will be published continuously (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are refereed through a peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed Open Access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1400 CHF (Swiss Francs).

Keywords

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

Published Papers (3 papers)

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Research

Open AccessArticle A Self-Assembled Electro-Active M8L4 Cage Based on Tetrathiafulvalene Ligands
Materials 2014, 7(1), 611-622; doi:10.3390/ma7010611
Received: 29 November 2013 / Revised: 9 January 2014 / Accepted: 9 January 2014 / Published: 22 January 2014
Cited by 10 | PDF Full-text (876 KB) | HTML Full-text | XML Full-text | Supplementary Files
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 [...] 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)
Figures

Open AccessArticle Self-Assembled M2L4 Nanocapsules: Synthesis, Structure and Host-Guest Recognition Toward Square Planar Metal Complexes
Materials 2014, 7(1), 287-301; doi:10.3390/ma7010287
Received: 1 October 2013 / Revised: 28 November 2013 / Accepted: 17 December 2013 / Published: 9 January 2014
Cited by 10 | PDF Full-text (950 KB) | HTML Full-text | XML Full-text | Supplementary Files
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 = [...] 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)
Open AccessArticle Synthesis, Molecular Structure and Cytotoxicity of Molecular Materials Based on Water Soluble Half-Sandwich Rh(III) and Ir(III) Tetranuclear Metalla-Cycles
Materials 2013, 6(11), 5352-5366; doi:10.3390/ma6115352
Received: 1 October 2013 / Revised: 8 November 2013 / Accepted: 12 November 2013 / Published: 20 November 2013
Cited by 9 | PDF Full-text (766 KB) | HTML Full-text | XML Full-text
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 [...] 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 38 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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