A new Schiff base ligand, 1-[(2-pyridin-2-yl-ethylimino)-methyl]-naphthalen-2-ol, (HPEMN) has been synthesized equipped with naphthalene and pyridine backbone, to study the interplay of various non-covalent interactions. Experiments have been carried out to investigate the outcome of combinations of HPEMN and ZnCl2(1), ZnBr2(2), ZnI2(3), Zn(NO3)2·6H2O (4), Co(ClO4)2·6H2O (5), Cu(ClO4)2·6H2O (6) and VO(acac)2(7). The prevalent non-covalent interactions described here include naphthalene–naphthalene (for 1, 2, 3 and 5) and pyridine–pyridine π–π stacking (for 4) interactions, nitrate anion⋯π interaction (for 4) and hydrogen bonding (for 6). HPEMN is able to sense Zn(II) selectively and this phenomenon was further demonstrated by the results of fluorescence studies in H2O/acetonitrile (8:2, v/v) HEPES buffer (pH = 7.4) solution and human lung cancer cell lines. © 2016 Elsevier Ltd

DILIP MAITI

Chemistry

SANCHITA GOSWAMI

B NASKAR

R MODAK

MANDAL S KUMAR

BISWAS J KUMAR

MONDAL T KUMAR

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Polyhedron

Herein, a new probe, 5-methyl-1-pyridin-2-yl-1H-pyrazole-3-carboxylic acid (1-pyridin-2-yl-ethylidene)-hydrazide (Hmppc), bearing a pyridine-pyrazole moiety, was synthesized, which offered potential for chemical sensing of Al3+. Investigations of the fluorescence behaviour of Hmppc in DMSO/H2O (2:8, v/v) solution under biologically relevant conditions in HEPES buffer (pH = 7.4) displayed a dramatic switch-on response to Al3+ as a result of chelation-induced enhanced fluorescence (CHEF). Detailed experimental studies reveal that Hmppc can detect Al3+ in solution with high sensitivity and selectivity, having a detection limit of 1.2 nM. Furthermore, to demonstrate the analytical potential of Hmppc, we validated our sensing system as a naked eye detector for Al3+. Interestingly, bioimaging studies on HepG2 cells demonstrated that Hmppc responded selectively towards Al3+, allowing real time detection of Al3+ in living cells. © 2018 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

New Journal of Chemistry

A new fluorescence turn-on chemosensor for nanomolar detection of Al3+ constructed from a pyridine-pyrazole system

Selective and sensitive detection of Zn2+ is important both in chemistry and biology. A water soluble simple Schiff base ligand, 2-[(2-hydroxyethylimino)methyl]]phenol (H2SalEt) was synthesized by one step condensation reaction between salicylaldehyde and 2-amino-1-ethanol in ethanol medium which is demonstrated to have utility in selectively determining Zn2+ ions over other common metal ions in (100 mM HEPES buffer, pH 7.4) solution displaying a significant colour change yellow to blue under UV light. The binding of HSalEt-Zn2+ was tracked by elemental analysis, mass spectra analysis, FT-IR, 1H and 13C NMR spectroscopy in CH3OH-d4. Single crystal X-ray diffraction studies reaffirm the binding modes of HSalEt-Zn2+ aggregate. The ligand (H2SalEt) exhibits a weak fluorescence intensity (quantum yield, Φ = 0.054) and the presence of zinc ions 14 fold enhancement of fluorescence intensity (quantum yield, Φ = 0.769). H2SalEt allows the detection of Zn2+ at 10-7 (M) level. Addition of chelating agent EDTA to a solution containing HSalEt-Zn2+ complex leads to immediate quenching of fluorescent intensity, making the chemosensor H2SalEt a reversible one. In aqueous solution, H2SalEt induces a (2:1) complex formation with Zn2+ ions indicated by Job's plot analysis. 'OR' and 'Keypad lock' logic gates were created that respond to Zn2+ and Al3+ inputs with absorbance (359 nm) and fluorescence output (454 nm) signals. In order to further explore the sensing potential of H2SalEt, two different kinds of cells, Azotobacter chroococcum and Candida albicans were used for in vitro investigation of the intracellular Zn2+ by H2SalEt. Fluorescence imaging of translocation of Zn2+ through the transparent stem of rice seedling, Oryza sativa, proved in vivo bio imaging capability of H2SalEt. © 2016 Elsevier B.V. All rights reserved.

Journal of Photochemistry and Photobiology A: Chemistry

A simple Schiff base molecular logic gate for detection of Zn2+ in water and its bio-imaging application in plant system

Five-coordinate metal(II) complexes based pyrazolyl ligands

Transition Metal Chemistry

fac-Cobalt(III)-azido complexes derived from substituted pyridyl-based tridentate amines

Inorganic Chemistry

Differentially Selective Chemosensor with Fluorescence Off–On Responses on Cu2+ and Zn2+ Ions in Aqueous Media and Applications in Pyrophosphate Sensing, Live Cell Imaging, and Cytotoxicity

CrystEngComm

An unusual nitroso⋯nitroso interaction in the coordination polymer structures of Ni(ii) and Co(ii) complexes with the α,ω-bis(benzotriazoloxy)alkane system

Syntheses and non-covalent interactions of naphthalene-bearing Schiff base complexes of Zn(II), Co(III), Cu(II) and V(IV): Selective detection of Zn(II)

Journal	Data powered by TypesetPolyhedron
Publisher	Data powered by TypesetElsevier Ltd
ISSN	0277-5387
Open Access	No