naa a22 4500 510734316 CHVBK 20180411083004.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s12039-013-0435-5 doi (NATIONALLICENCE)springer-10.1007/s12039-013-0435-5 Syntheses, molecular and crystalline architectures, and luminescence behaviour of terephthalate bridged heptacoordinated dinuclear lead(II) complexes containing a pentadentate N-donor Schiff base [Elektronische Daten] [SUBHASIS ROY, SOMNATH CHOUBEY, SUMITAVA KHAN, KISHALAY BHAR, PARTHA MITRA, BARINDRA GHOSH] One-pot synthesis using a 2:2:1:2 molar ratio of Pb(OAc)2·3H2O, L, piperidinum terephthalate (ptp) and NaClO4/NH4PF6 at room temperature affords two dinuclear compounds of the type [Pb2(L) $_{2}(\upmu $ -tp)](ClO4/PF6)2 (1/2) [L=N,N′-(bis-(pyridin-2-yl)benzylidene)diethylenetriamine and tp = terephthalate dianion]. The compounds are characterized by microanalytical, spectroscopic, thermal and other physicochemical results. X-ray structural analyses of 1 and 2 reveal that each heptacoordinated lead(II) centre with a PbN5O2 chromophore are bound by five N atoms of L and connected through O atoms of a bis(bidentate) tp bridge. The arrangements of L and tp suggest a gap around the metal centre due to occupation of a stereo-active lone pair of electrons reflecting a hemidirected coordination around the metal centre. The complexes exhibit reasonable thermal stabilities with the tolerate temperatures ca. 255°C for 1 and 263°C for 2. The complexes display intraligand (π-π*) fluorescence in the solid state and in DMF solutions at room temperature. Graphical Abstract Two dinuclear lead(II) compounds are isolated and X-ray crystallographically characterized. Each heptacoordinated metal(II) center adopts a hemidirected environment and connected through bis(bidentate) terephthalate bridge. The complexes exhibit intraligand 1(π-π*) fluorescence in the solid state and in DMF solutions at room temperature. Indian Academy of Sciences, 2013 Dinuclear lead(II) nationallicence Schiff base nationallicence terephthalate bridge nationallicence hemidirected structures nationallicence luminescence nationallicence ROY SUBHASIS Department of Chemistry, The University of Burdwan, 713 104, Burdwan, India aut CHOUBEY SOMNATH Department of Chemistry, The University of Burdwan, 713 104, Burdwan, India aut KHAN SUMITAVA Department of Chemistry, The University of Burdwan, 713 104, Burdwan, India aut BHAR KISHALAY Department of Chemistry, The University of Burdwan, 713 104, Burdwan, India aut MITRA PARTHA Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 700 032, Kolkata, India aut GHOSH BARINDRA Department of Chemistry, The University of Burdwan, 713 104, Burdwan, India aut Journal of Chemical Sciences Springer India 125/4(2013-07-01), 715-721 0974-3626 125:4<715 2013 125 12039 https://doi.org/10.1007/s12039-013-0435-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12039-013-0435-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- ROY SUBHASIS Department of Chemistry, The University of Burdwan, 713 104, Burdwan, India aut NATIONALLICENCE 700 1- CHOUBEY SOMNATH Department of Chemistry, The University of Burdwan, 713 104, Burdwan, India aut NATIONALLICENCE 700 1- KHAN SUMITAVA Department of Chemistry, The University of Burdwan, 713 104, Burdwan, India aut NATIONALLICENCE 700 1- BHAR KISHALAY Department of Chemistry, The University of Burdwan, 713 104, Burdwan, India aut NATIONALLICENCE 700 1- MITRA PARTHA Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 700 032, Kolkata, India aut NATIONALLICENCE 700 1- GHOSH BARINDRA Department of Chemistry, The University of Burdwan, 713 104, Burdwan, India aut NATIONALLICENCE 773 0- Journal of Chemical Sciences Springer India 125/4(2013-07-01), 715-721 0974-3626 125:4<715 2013 125 12039 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer