title: Coordinatively Unsaturated Lanthanide(III) Helicates: Luminescence Sensors for Adenosine Monophosphate in Aqueous Media.
abstract: Coordinatively unsaturated double-stranded helicates [(H2 L)2 Eu2 (NO3 )2 (H2 O)4 ](NO3 )4 , [(H2 L)2 Tb2 (H2 O)6 ](NO3 )6 , and [(H2 L)2 Tb2 (H2 O)6 ]Cl6 (H2 L=butanedioicacid-1,4-bis[2-(2-pyridinylmethylene)hydrazide]) are easily obtained by self-assembly from the ligand and the corresponding lanthanide(III) salts. The complexes are characterized by X-ray crystallography showing the helical arrangement of the ligands. Co-ligands at the metal ions can be easily substituted by appropriate anions. A specific luminescence response of AMP in presence of ADP, ATP, and other anions is observed. Specificity is assigned to the perfect size match of AMP to bridge the two metal centers and to replace quenching co-ligands in the coordination sphere.
authors.affiliation: Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Academy of Scientific and Innovative Research (AcSIR), Bhavnagar, 364002, Gujarat, India.
authors.forename: Jashobanta
authors.initials: J
authors.lastname: Sahoo
authors.affiliation: Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Academy of Scientific and Innovative Research (AcSIR), Bhavnagar, 364002, Gujarat, India.
authors.forename: Rajendran
authors.initials: R
authors.lastname: Arunachalam
authors.affiliation: Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Academy of Scientific and Innovative Research (AcSIR), Bhavnagar, 364002, Gujarat, India. siva140@yahoo.co.in.
authors.forename: Palani S
authors.initials: PS
authors.lastname: Subramanian
authors.affiliation: Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Academy of Scientific and Innovative Research (AcSIR), Bhavnagar, 364002, Gujarat, India.
authors.forename: Eringathodi
authors.initials: E
authors.lastname: Suresh
authors.affiliation: University of Jyvaskyla, Department of Chemistry, Nanoscience Center, P.O. Box. 35, 40014, University of Jyvaskyla, Finland.
authors.forename: Arto
authors.initials: A
authors.lastname: Valkonen
authors.affiliation: University of Jyvaskyla, Department of Chemistry, Nanoscience Center, P.O. Box. 35, 40014, University of Jyvaskyla, Finland.
authors.forename: Kari
authors.initials: K
authors.lastname: Rissanen
authors.affiliation: Institut für Organische Chemie, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany. markus.albrecht@oc.rwth-aachen.de.
authors.forename: Markus
authors.identifier: 0000-0002-3501-1477
authors.initials: M
authors.lastname: Albrecht
keywords: adenosine monophosphate; helicates; lanthanides; luminescence; sensing