Isocyanonaphthalenes as extremely low molecular weight, selective, ratiometric fluorescent probes for Mercury(II)

Fluorescence sensing, of d-block elements such as Cu2+, Fe3+, Fe2+, Cd2+, Hg2+, and Zn2+ has significantly increased since the beginning of the 21st century. These particular metal ions play essential roles in biological, industrial, and environmental applications, therefore, there has been a drive to measure, detect, and remediate these metal ions. We have chosen to highlight the low molecular weight fluorescent probes (LMFPs) that undergo an optical response upon coordination with the group 12 triad (Zn2+, Cd2+, and Hg2+), as these metals have similar chemical characteristics but behave differently in the environment.

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A SET OF FLUORESCENT PROBES TO STUDY THE INFLUENCE OF LOW MOLECULAR WEIGHT CRYOPROTECTANTS ON HUMAN ERYTHROCYTE MEMBRANES

Kharkov University Bulletin Chemical Series ◽

10.26565/2220-637x-2016-26-01 ◽

2016 ◽

Author(s):

Y. Korniyenko ◽

Y. Posokhov

Keyword(s):

Molecular Weight ◽

Fluorescent Probes ◽

Human Erythrocyte ◽

Erythrocyte Membranes ◽

Low Molecular Weight ◽

Human Erythrocyte Membranes

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Low molecular weight fluorescent probes with good photostability for imaging RNA-rich nucleolus and RNA in cytoplasm in living cells

Biomaterials ◽

10.1016/j.biomaterials.2013.11.052 ◽

2014 ◽

Vol 35 (7) ◽

pp. 2103-2112 ◽

Cited By ~ 64

Author(s):

Guofen Song ◽

Yuming Sun ◽

Yong Liu ◽

Xiankun Wang ◽

Meiling Chen ◽

...

Keyword(s):

Molecular Weight ◽

Fluorescent Probes ◽

Living Cells ◽

Low Molecular Weight

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Low Molecular Weight Fluorescent probes for the detection of organophosphates

Journal of Luminescence ◽

10.1016/j.jlumin.2021.118053 ◽

2021 ◽

Vol 235 ◽

pp. 118053

Author(s):

Rashid Mia ◽

Peter J. Cragg ◽

Karl J. Wallace

Keyword(s):

Molecular Weight ◽

Fluorescent Probes ◽

Low Molecular Weight

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Study of Interaction of Glycerol Cryoprotectant and Its Derivatives with Dimethylacetamide in Aqueous Solution Using Fluorescent Probes

Problems of Cryobiology and Cryomedicine ◽

10.15407/cryo31.02.139 ◽

2021 ◽

Vol 31 (2) ◽

pp. 139-150

Author(s):

Tetiana Dyubko ◽

◽

Vasyl Pivovarenko ◽

Valentina Chekanova ◽

Yuliya Pakhomova ◽

...

Keyword(s):

Aqueous Solution ◽

Molecular Weight ◽

High Molecular Weight ◽

Fluorescent Probes ◽

Low Molecular Weight ◽

Polymerization Degree ◽

Structural Rearrangements ◽

Cryoprotective Agents ◽

Molecular Associates ◽

Derivatives Of

In this paper we have studied the interaction of the mixtures of glycerol (GL) and its oxyethylated derivatives (OEG) with polymerization degree n = 3, 25 and 30 with dimethylacetamide (DMAc) in aqueous solution using 3-hydroxy-4´-(N, N dimethylaminoflavone) fluorescent probe. The combination of GL and its oxyethylated derivatives with DMAc was found to reduce the membranotropy of certain cryoprotective agents, forming a mixture. The combination of both GL and its low molecular weight derivative (OEGn=3) with DMAc reduced the membranotropy of the latter. At the same time, combining GL derivatives of high molecular weight (OEGn=25 and OEGn=30) with DMAc diminished the membranotropy of OEG. The OEGn=30 at concentrations above 1 wt.% was shown to form the micellar-type structures or micellar associates in aqueous solution. This enabled suggesting the membranotropic ability of high molecular weight OEG associates to be stipulated by possible interaction of their nonpolar segments with nonpolar sites on biomembrane surface. Structural rearrangements of molecular associates in aqueous solutions of low and high molecular weight cryoprotectant mixtures were designated as the experimentally established mechanism of cytotoxicity reduction in combined cryoprotective media.

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A high-performance oil-free backing pump for electron microscopes

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107691 ◽

1978 ◽

Vol 36 (1) ◽

pp. 110-111

Author(s):

G.K.W. Balkau ◽

E. Bez ◽

J.L. Farrant

Keyword(s):

Molecular Weight ◽

Electron Microscope ◽

Hot Spots ◽

High Performance ◽

Carbonaceous Material ◽

Contamination Rate ◽

Low Molecular Weight ◽

Principal Source ◽

Rotary Pumps ◽

Electron Microscopes

The earliest account of the contamination of electron microscope specimens by the deposition of carbonaceous material during electron irradiation was published in 1947 by Watson who was then working in Canada. It was soon established that this carbonaceous material is formed from organic vapours, and it is now recognized that the principal source is the oil-sealed rotary pumps which provide the backing vacuum. It has been shown that the organic vapours consist of low molecular weight fragments of oil molecules which have been degraded at hot spots produced by friction between the vanes and the surfaces on which they slide. As satisfactory oil-free pumps are unavailable, it is standard electron microscope practice to reduce the partial pressure of organic vapours in the microscope in the vicinity of the specimen by using liquid-nitrogen cooled anti-contamination devices. Traps of this type are sufficient to reduce the contamination rate to about 0.1 Å per min, which is tolerable for many investigations.

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