ABSTRACT
Several azine derivatives have been prepared and structurally characterized by spectroscopic and single-crystal X-ray diffraction analysis. Two of them, viz. naphthalene based (A10) and anthracene based (A11) show fluorescence enhancement in the presence of Ag+ in aqueous-methanol. Moreover, A11 efficiently tracks Ag+in vitro endophytic bacteria infected rice root tissue. Experimental results have been substantiated by theoretical DFT calculations.
Subject(s)
Oryza/microbiology , Plant Roots/microbiology , Silver/chemistry , Crystallography, X-Ray , In Vitro TechniquesABSTRACT
Naphthalene has emission in the ultraviolet (UV) region, limiting its trace level determination in biological and environmental samples due to detrimental effect of UV light on the living cell and interference from other substances having emission in the UV region. Fluorescence resonance energy transfer strategy is adopted for determination of traces naphthalene in the visible region. Significant improvement of lowest detection limit of naphthalene has been achieved through tuning of fluorescence resonance energy transfer efficiency. Anthranilic acid pyrene (ANP) conjugate provides lowest detection limit for naphthalene among three probes studied, viz. ANB, aniline- pyrene conjugate (APA) and ANP. ANP efficiently measures naphthalene content in river water. Copyright © 2016 John Wiley & Sons, Ltd.
Subject(s)
Fluorescence Resonance Energy Transfer/methods , Naphthalenes/analysis , Water Pollutants, Chemical/analysis , Environmental Monitoring , Fluorescent Dyes/chemistry , Limit of Detection , Pyrenes/chemistry , RiversABSTRACT
Thiophene appended rhodaminehydrazone derivative, RDHDTCA allows selective colorimetric and fluorescence recognition of Cu(2+) as low as 2.4 × 10(-8) M. RDHDTCA is capable to detect intracellular Cu(2+) in human breast cancer cells, MCF7 under fluorescence microscope.
Subject(s)
Breast Neoplasms/chemistry , Copper/analysis , Fluorescent Dyes/chemistry , Rhodamines/chemistry , Thiophenes/chemistry , Breast/chemistry , Breast/pathology , Breast Neoplasms/pathology , Colorimetry , Female , Fluorescence , Humans , Hydrolysis , Light , Microscopy, Fluorescence , Optical ImagingABSTRACT
Two 3D porous terbium(III) mucicate frameworks, {[Tb(2)(Mu(2-))(3)(H(2)O)(2)]·4H(2)O}(n) (1) and {[Tb(Mu(2-))(Ox(2-))(0.5)(H(2)O)]·H(2)O}(n) (2), have been synthesized under hydrothermal conditions by changing the pH of the reaction medium. Isostructural europium(III) and seven mixed terbium(III)-europium(III) mucicates were synthesized by doping different percentages of Eu(III) under similar reaction conditions and unveiling different emission colors ranging from green to red under the same wavelength. Both dehydrated Tb(III) metal-organic frameworks exhibit selective H(2)O vapor sorption over other solvent molecules (MeOH, MeCN, and EtOH) of less polarity and bigger size and have been correlated to the highly hydrophilic pore surfaces decorated with -OH groups and O atoms from the carboxyl groups of mucicate.