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      Walkable Dual Emissions

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          Abstract

          Walkable dual emissions, in which the emission bands of the walker reversibly cross or leave those of the stationary ones depending on temperature and concentration, have been demonstrated in cyclic dimeric lanthanide complexes [Ln(hfac) 3(PAnPO 2)] 2 (Ln = Eu III, Tb III; hfac − = hexafluoroacetylacetonate; PAnPO 2 = 9,10-bis(diphenylphosphino) anthracene dioxide), providing a concept model for signals exchanging and dispatching. Additionally, good linear relationships are observed between the maximum emission bands of the walker vs the concentrations {lg( M)} and the measurement temperatures ( K), implying such materials could be served as potential concentration and temperature sensors.

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          Metallosupramolecular squares: from structure to function.

          Frank Würthner, Chang-Cheng You, Chantu R Saha-Möller (2004)
          Metallosupramolecular squares have been successfully evolved over the past years as versatile substitutes of the conventional organic macrocycles owing to the development of reliable synthetic protocols and abundant structural variability (metals and ligands). In this review we have presented the fundamental aspects of metallosupramolecular squares such as the strategies for their construction (self-assembly vs. kinetically controlled macrocyclization) and characterization. The major emphasis of this tutorial review lies on the function of metallosupramolecular squares. Thus, the introduction of functionality into these systems has been discussed in detail by highlighting the recent progress toward application in various fields, including molecular recognition, enantioselective sensing, photoluminescence, redox activity and electrochemical sensing, and homogeneous catalysis.
          Article 0 comments Cited 43 times – based on 0 reviews     Review now
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            Self-assembly and molecular recognition of a luminescent gold rectangle.

            Maria Ho, George Kwok Chu Wong, Rosita M L Koh … (2004)
            A luminescent molecular rectangle [Au(4)(micro-PAnP)(2)(micro-bipy)(2)](OTf)(4) (1.(OTf)(4)) (PAnP = 9,10-bis(diphenylphosphino)anthracene, bipy = 4,4'-bipyridine, X = NO(3)(-) or OTf(-)), synthesized from the self-assembly of the molecular "clip" Au(2)(micro-PAnP)(OTf)(2) and bipy, shows a large rectangular cavity of 7.921(3) x 16.76(3) A. The electronic absorption and emission spectroscopy, and electrochemistry of the metallacyclophane, have been studied. The 1(4+) ions are self-assembled into 2D mosaic in the solid state via complementary edge-to-face interactions between the Ph groups. (1)H NMR titrations ratify the 1:1 complexation between 1(4+) and various aromatic molecules. Comparing the structures of the inclusion complexes indicates an induced-fit mechanism operating in the binding. The emission of 1(4+) is quenched upon the guest binding. The binding constants are determined by both (1)H NMR and fluorescence titrations. Solvophobic and ion-dipole effects are shown to be important in stabilizing the inclusion complexes.
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              First examples of Au(I)-X-Ag(I) halonium cations (X = Cl and Br).

              Wan-Ke Zhang, Janardhana Prabhavathy, John H K Yip … (2003)
              Novel {[(mu-PAnP)(AuX)2]2Ag}+SbF6- halonium ions (X = Cl, Br; PAnP = 9,10-bis(diphenylphosphino)anthracene) were synthesized from the reactions between (mu-PAnP)(AuX)2 and 1/2 mol equiv of AgSbF6. The compounds feature an unprecedented distorted Au4X4 dodecahedron which encapsulates a silver(I) ion at its center. The halonium ions are stabilized by collective actions of metallophilic Au-Ag, aromatic pi-pi, and Ag-X interactions.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Sci Rep
                Journal ID (iso-abbrev): Sci Rep
                Title: Scientific Reports
                Publisher: Nature Publishing Group
                ISSN (Electronic): 2045-2322
                Publication date (Electronic): 16 July 2013
                Publication date Collection: 2013
                Volume: 3
                Electronic Location Identifier: 2199
                Affiliations
                [1 ]New Materials R&D Center, Key Laboratory of Science and Technology on High Energy Laser, Institute of Chemical Materials , China Academy of Engineering Physics, Chengdu, Sichuan 610200, China
                [2 ]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter , Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
                Author notes
                Article
                Publisher Item ID: srep02199
                DOI: 10.1038/srep02199
                PMC ID: 3712315
                PubMed ID: 23857434
                SO-VID: febdc78e-a63e-4094-8ecf-f253a31da1b4
                Copyright © Copyright © 2013, Macmillan Publishers Limited. All rights reserved
                License:

                This work is licensed under a Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/

                History
                Date received : 17 May 2013
                Date accepted : 25 June 2013
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                Subject: Article

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