Abstract

The Photoluminescence of Lanthanide Complexes and Energy Transfer Theories

Wakeel Ahmed Dar1 and Ruqiya Bhat2

1Department of Chemical Sciences, Jamia Millia Islamia, New Delhi-110025, INDIA. 2Department of Physics, University of Kashmir, Srinagar (J&K)-190006, INDIA.

ABSTRACT

The luminescence of lanthanide complexes is one of the most interesting feature. The intensity of the emission peaks of the luminescent lanthanide ions can be increased by several orders of magnitude by coordinating them with the organic chromophores of high absorption coefficient. The chromophores are excellent light harvesting and sufficiently populate the emitting levels of the lanthanide ions by efficiently transferring absorbed energy to the lanthanides via a well-known 'antenna effect. The different energy transfer theories are there to explain the mechanism of energy transfer mechanism in such complexes. The commonly accepted mechanism is one proposed by Crosby and Whan.

Keywords :luminescence of lanthanide complexes, organic chromophores.