• Synthesis, characterization and emission properties of quinolin-8-olato chelated ruthenium organometallics

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    • Keywords

       

      Ruthenium organometallics; quinolin-8-olato chelation; emission properties; trivalent ruthenium

    • Abstract

       

      The reaction of Ru(RL1)(PPh3)2(CO)Cl,1, with quinolin-8-ol (HQ) has afforded complexes of the type [Ru(RL2)(PPh3)2(CO)(Q)],3, in excellent yield (RL1 is C6H2O-2-CHNHC6H4R(p)-3-Me-5, RL2 is C6H2OH-2-CHNC6H4R(p)-3-Me-5 and R is Me, OMe, Cl). In this process, quinolin-8-olato (Q) undergoes five-membered chelation, the iminium-phenolato function tautomerizing to the imine-phenol function. In dichloromethane solution,3 displays a quasireversible3+/3 couple near 0·50 V vs SCE (3+ is the ruthenium (III) analogue of3). Coulometrically generated solutions of3+ display a strong absorption near 395 nm associated with a shoulder near 475 nm and rhombic EPR spectra withg values near 2·55, 2·13, 1·89. Solutions of3 absorb near 415 nm and emit near 510 nm at 298 K and 585 nm at 77 K. The fluorescence is believed to originate from the3MLCT state

    • Author Affiliations

       

      Bikash Kumar Panda1

      1. Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata - 700 032, India
    • Dates

       
  • Journal of Chemical Sciences | News

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