Long-Chain Ketimine Synthesis in a Gold-Thallium Polymer

  1. Fernández, E.J. 1
  2. Garau, A. 3
  3. Laguna, A. 2
  4. Lasanta, T. 1
  5. Lippolis, V. 3
  6. López-De-Luzuriaga, J.M. 1
  7. Montiel, M. 1
  8. Olmos, M.E. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Instituto de Nanociencia y Materiales de Aragón
    info

    Instituto de Nanociencia y Materiales de Aragón

    Zaragoza, España

    ROR https://ror.org/031n2c920

  3. 3 University of Cagliari
    info

    University of Cagliari

    Cagliari, Italia

    ROR https://ror.org/003109y17

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Journal:
Organometallics

ISSN: 0276-7333

Year of publication: 2010

Volume: 29

Issue: 13

Pages: 2951-2959

Type: Article

DOI: 10.1021/OM100188F SCOPUS: 2-s2.0-77955780567 WoS: WOS:000279389500015 GOOGLE SCHOLAR

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Abstract

The heteropolynuclear complex [Tl{Au(C6Cl5) 2}]n reacts with sterically demanding diamines as tetramethylenediamine (TMDA), 2,2'-(ethylenedioxy)bis(ethylamine) (NOON), or triethylenetetramine (trien) in 1:1 molar ratio in tetrahydrofuran (THF), leading to products of stoichiometry [Tl{Au(C6Cl5) 2}(L)]n (L=TMDA (1), NOON (2),or trien (3)) or [Tl 2{Au(C6Cl5)2}2(L)] n (L=trien (4)) when the solvent used is toluene. Addition of acetylacetone to the diamine complexes in 1:1 molar ratio generates [Tl{Au-(C6Cl5)2}{O=C(CH3)CHC(CH 3)NH(CH2)4NH2}]n (5) and in 1:2 molar ratio [Tl{Au(C6Cl5)2}(L x)]n (Lx = {OdC(CH3)CHC(CH 3)NHCH2CH2}2 (6), {O=C(CH 3)CHC(CH3)NHCH2CH2OCH 2}2 (7)). When the molar ratio is 1:2, with the exception of 3, all these complexes display luminescence in the solid state at room temperature and at 77 K. The origin of the luminescence could be assigned to a delocalizated exciton along the heterometallic chain formed by Au · · · Tl interactions. In addition, a red shift is observed when the temperature decreases, which is attributed to the shortening of the Au-Tl distance at lower temperatures. The emissive properties of solutions of 5-7 and [Tl{Au(C6Cl5)2}]n in THF were studied after adding increasing amounts of different metal ions (Zn 2+, Cd2+, Hg2+, Pb2+, Cu 2+, Al3+, Ni2+, Ag+, Mn 2+, Bi3+) and anions (F-, Cl-, Br-, I-, H2PO4 -, ClO 4 -, Bz-, Ac-, HSO4 -, NO3 -). Interestingly, an enhancement of the fluorescence emission intensity was observed for the complexes considered only upon addition of Br-, Cl-, and Ac-. © 2010 American Chemical Society.