The first substituted macrocyclic ligand Py2N4S2 containing four naphthylmethylene pendant-armed groups: Synthesis and photophysical properties

Verónica García, A. Aldrey, Catherine S. de Castro, Rufina Bastida, Alejandro Macías, C. Lodeiro, J. Sergio Seixas de Melo, Cristina Núñez

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5 Citations (Scopus)

Abstract

The synthesis of a pendant donor emissive macrocyclic ligand Py 2N4S2 with up to four naphthylmethylene arms (L) has been achieved. Their derivative solid metal complexes (Co2 +, Ni2 +, Cu2 +, Zn2 +, Cd2 +, Hg 2 + and Ag+) have been isolated and characterized. The photophysical properties of the free ligand L and their complexation behaviour have been investigated in solution. In dichloromethane, the free ligand presents two emission bands which are related to the monomer naphthalene emission and a red-shifted band attributable to ground state dimers (interaction between two naphthalene chromophores), which was further validated from time-resolved data, with bi-exponential decay with absence of dynamic components. UV-Vis spectroscopy has revealed a 2:1 binding stoichiometry for Co2 +, Cu2 +, Zn2 +, Hg2 + and Ag+. © 2013 Elsevier B.V.
Original languageEnglish
Pages (from-to)22-26
Number of pages5
JournalInorganic Chemistry Communications
Volume36
DOIs
Publication statusPublished - Oct 2013

Keywords

  • Dinuclear complex
  • Macrocycles
  • Naphthalene
  • Pendant-arms
  • Sensor
  • Stability constant

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