title: Fluorogenic ratiometric dipodal optode containing imine-amide linkages: exploiting subtle thorium (IV) ion sensing.
abstract: The (13E,19E)-N1',N3'-bis[4-(diethylamino)-2-hydroxybenzylidene]malonohydrazide (L) has been developed for the detection of Th(4+) ions using dual channel signalling system. The UV-vis absorbance and fluorescence spectroscopic data revealed the formation of L-Th(4+) complex in 1:1 equilibrium. The density functional theory (DFT) also confirms the optimum binding cavity for the recognition of metal ion. The binding constant computed from different mathematical models for an assembly of L-Th(4+). The detection limit of L for Th(4+) recognition is to a concentration down to 0.1 μM (0.023 μg g(-1)). The present sensing system is also successfully applied for the detection of Th(4+) ion present in soil near nuclear atomic plants.
authors.affiliation: School of Chemical Sciences, North Maharashtra University, Jalgaon, India.
authors.forename: Kundan
authors.initials: K
authors.lastname: Tayade
authors.affiliation: Centre for Nanoscience and Nanotechnology, Panjab University, Chandigarh, India.
authors.forename: Amanpreet
authors.initials: A
authors.lastname: Kaur
authors.affiliation: School of Chemical Sciences, North Maharashtra University, Jalgaon, India.
authors.forename: Sandesh
authors.initials: S
authors.lastname: Tetgure
authors.affiliation: School of Chemical Sciences, Swami Ramanand Tirth Marathawada University, Nanded, India.
authors.forename: G Krishana
authors.initials: GK
authors.lastname: Chaitanya
authors.affiliation: Department of Chemistry, Indian Institute of Technology, Ropar, Punjab, India.
authors.forename: Narinder
authors.initials: N
authors.lastname: Singh
authors.affiliation: School of Chemical Sciences, North Maharashtra University, Jalgaon, India. Electronic address: kuwaras@gmail.com.
authors.forename: Anil
authors.initials: A
authors.lastname: Kuwar
mesh_terms: D000577:Amides / Q000737:chemistry*; D002412:Cations / Q000032:analysis; D005456:Fluorescent Dyes / Q000737:chemistry*; D007097:Imines / Q000737:chemistry*; D057230:Limit of Detection; D008958:Models, Molecular; D012987:Soil / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods; D013910:Thorium / Q000032:analysis*
chemical_list: D000577:Amides; D002412:Cations; D005456:Fluorescent Dyes; D007097:Imines; D012987:Soil; D013910:Thorium
keywords: Ratiometric fluorescent sensor; Real sample analysis; Tetravalent thorium ion (Th(4+))