IIT Hyderabad will organize a special lecture by Dr. Takayoshi Suzuki, Okayama University, with the following detail. Simultaneously, another lecture entitled “Application of genetically engineered photosynthetic reaction center to construction of chloroplast solar and chloroplast hydrogen generator” by Dr. Yuichiro Takahashi, Okayama University will be held as well.

Abstract

Metallacalix[n]arenes are a promising class of compounds because of their fascinating proper-ties for the size- and charge-selective capture of a specific molecule or ion, in addition to their magnetic, electrochemical and catalytic functionalities originated from the cyclic multi-metallic cores.  We are aiming to prepare such compounds using a half-sandwich Cp*Rh^III (Cp* = h⁵-C₅Me₅^–) fragment and suitable bridging ligands derived from nucleobases.  However, because these ligands are unsymmetrical with two or more donor sites, there are many possible linkage isomers and tautomers, and it is often difficult to control the reaction products.  In this study we used thyminate(2–) (thym^2–) as a bridging ligand, and we found that a certain metal ion (Mⁿ⁺ = Na⁺, Ca²⁺ or Ln³⁺; Ln = La, Eu, Dy and Er) can act as a template to form a cyclic tetranuclear [(Cp*Rh)₄(m-thym)₄M]ⁿ⁺ cluster bearing a metallacalix[4]arene framework.