title: A New Fluorescent "Off-On" Sensor for Al(3+) Derived from L-alanine and Salicylaldehyde.
abstract: The condensation product of L-alanine and salicylaldehyde was synthesised and characterised which was found to be selective fluorescent "on" sensor for Al(3+) ion with the detection limit 10(-6) M. The sensor is free of interferences from metal ions - Na(+), K(+), Ca(2+), Mn(2+), Co(2+), Ni(2+), Cu(2+), Pb(2+), Cd(2+), Hg(2+) and Fe(3+). The Fluorescence and the UV/visible spectral data reveals a 1:1 interaction between the sensor and Al(3+) ion with binding constant 10(4.5). The DFT and TDDFT calculations confirm the structures of the sensor and the sensor-Al(3+) complex.
authors: Department of Chemistry, Gauhati University, Guwahati, Assam, 781 014, India.
authors: Smita
authors: S
authors: Sarma
authors: Department of Chemistry, Arya Vidyapeeth College, Guwahati, Assam, 781 016, India.
authors: Pradip Kr
authors: PK
authors: Bhattacharyya
authors: Department of Chemistry, Gauhati University, Guwahati, Assam, 781 014, India. digkdas@yahoo.com.
authors: Diganta Kumar
authors: DK
authors: Das
keywords: Aluminium; Fluorescence; L-alanine; Salicylaldehyde; Sensor; TDDFT