Chapter 1. Lanthanum: Complexes with Variable Coordination and Versatile Applications


Vibha Vinayakumar Bhat¹ and P. R. Chetana²
¹Department of Chemistry, M S Ramaiah College of Arts, Science and Commerce, MSR Nagar, Bengaluru, Karnataka, India
²Department of Chemistry, Central College Campus, Bengaluru City University, Bengaluru, India

Part of the book: What to Know about Lanthanum


The rise of applications of lanthanum (III) metal ions in inorganic and bioinorganic fields are tremendous in recent years. The geometrical diversities due to variable coordination number, high Lewis acidity, and higher charge make La(III) ion bind to hard bases such as O, and N donor ligands making the complexes very beneficial in the field of luminescence, diagnostics and therapeutical agents. In recent years, rapid and continued interests have emerged in investigating and designing new molecules and metal complexes containing La(III) metal ion and other lanthanides in the field of medicine, MRI technology, immunoassays, separation techniques, etc. La(III)-complexes have been investigated for their applications as nucleic acid and protein binding agents, chemical nucleases, antiproliferative agents, antioxidants as well as antimicrobial agents. The stability induced by La(III) metal ion to the organic, bulkier ligands could be successfully utilized as a drug transport vehicle toward the target site in the biological systems. Here in this chapter, we would like to explain the synthetic methods of various La(III) complexes, their variable coordination geometry, applications in the field of luminescence, binding abilities towards nucleic acids and proteins, and cytotoxic activities against various cancerous cell lines, antimicrobial activities and antioxidant activities. The structural and application diversities of La(III)-complexes are graphically shown below.

Keywords: Lanthanum(III) complex, DNA binder, chemical nuclease, antimicrobial, photoluminescent


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