A Zn based coordination polymer exhibiting long-lasting phosphorescence

2016 ◽  
Vol 52 (56) ◽  
pp. 8671-8674 ◽  
Author(s):  
Javier Cepeda ◽  
Eider San Sebastian ◽  
Daniel Padro ◽  
Antonio Rodríguez-Diéguez ◽  
Jose A. García ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Blue Fluorescence ◽  
Bright Blue Fluorescence ◽  
Bright Blue

A coordination polymer consisting of Zn and 6-aminoisonicotinate shows an initial bright blue fluorescence that turns into persistent green phosphorescence.

Location of Absorbed Carcinogens within the Amphibian Cell

1949 ◽  
Vol s3-90 (10) ◽  
pp. 209-219
Author(s):  
C. H. WADDINGTON ◽  
C. B. GOODHART
Keyword(s):  
Mutagenic Activity ◽  
Ultra Violet ◽  
Blue Fluorescence ◽  
Cytoplasmic Granules ◽  
Violet Light ◽  
Naturally Occurring ◽  
Standard Solution ◽  
Carcinogenic Hydrocarbons ◽  
Bright Blue Fluorescence ◽  
Bright Blue

Cells from explants of newt gastrulae which had been cultured in Holtfreter's standard solution containing the carcinogen 3:4-benzpyrene rendered soluble by caffeine were examined for fluorescence by ultra-violet light. The lipoid constituents of the cells, lipochondria and liposomes, showed the bright blue fluorescence of benzpyrene in molecular solution and there was also occasionally a structureless blue fluorescence round the nucleus corresponding, perhaps to the so-called ‘Golgi Apparatus’. The yolk platelets were slightly fluorescent but this was probably due to the associated lipides and it largely disappeared in moribund preparations, where the lipochondria became detached from the platelets. The nucleus showed no fluorescence, nor was a, fluorescent nucleolus observed. It could be shown that the pyronine staining cytoplasmic granules of ribonucleoprotein (microsomes) were not fluorescent and so probably do not have any affinity for the carcinogen. The very small fluorescent granules in Brownian movement that had previously been looked upon as ribonucleoprotein microsomes are in fact small liposomes and do not stain with pyronine. It is suggested that the evocating power of the carcinogenic hydrocarbons is probably not due to cytolytic activation of the evocator, by the killing of some cells in the exposed ectoderm. It may be by physiological activation, operating through a specific action on the lipochondria, leading to their breakdown into liposomes and the release of active evocator substance. Some evidence is produced which suggests that the lipochondria contain ribonucleoprotein, and this fraction of them may constitute the active evocator; this would be congruent with the theories of Brachet (1947). It cannot yet be excluded, however, that the hydrocarbons act as direct evocators, simulating the effects of the naturally occurring substance. The observation that benzpyrene is not accumulated by nucleoprotein makes it likely that the mutagenic activity of the carcinogens is indirect.

Photochemical studies of a fluorescent chlorophyll catabolite – source of bright blue fluorescence in plant tissue and efficient sensitizer of singlet oxygen

2014 ◽  
Vol 13 (2) ◽  
pp. 407-411 ◽  
Author(s):  
Steffen Jockusch ◽  
Nicholas J. Turro ◽  
Srinivas Banala ◽  
Bernhard Kräutler
Keyword(s):  
Singlet Oxygen ◽  
Quantum Efficiency ◽  
Plant Tissue ◽  
Blue Fluorescence ◽  
High Quantum Efficiency ◽  
High Quantum ◽  
Chlorophyll Catabolites ◽  
Bright Blue Fluorescence ◽  
Bright Blue ◽  
Chlorophyll Catabolite

Hypermodified fluorescent chlorophyll catabolites, which accumulate in yellow banana peels, show strong blue fluorescence and generate singlet oxygen with high quantum efficiency.

A twofold interpenetrating three-dimensional zinc–organic framework built from naphthalene-1,4-dicarboxylate and 4,4′-bipyridine ligands

2014 ◽  
Vol 70 (5) ◽  
pp. 498-501 ◽  
Author(s):  
Guo-Gen Cui ◽  
Xiao-Xi Yang ◽  
Jian-Ping Yang
Keyword(s):  
Dicarboxylic Acid ◽  
Title Compound ◽  
Room Temperature ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Secondary Building Unit ◽  
Blue Fluorescence ◽  
Tetrahedral Geometry ◽  
Bright Blue Fluorescence ◽  
Bright Blue

A novel three-dimensional ZnII complex, poly[[(μ2-4,4′-bipyridine)(μ4-naphthalene-1,4-dicarboxylato)(μ2-naphthalene-1,4-dicarboxylato)dizinc(II)] dimethylformamide monosolvate monohydrate], {[Zn2(C12H6O4)2(C10H8N2)]·2C3H7NO·H2O)} n , has been prepared by the solvothermal assembly of Zn(NO3)·6H2O, naphthalene-1,4-dicarboxylic acid and 4,4′-bipyridine. The two crystallographically independent Zn atoms adopt the same four-coordinated tetrahedral geometry (ZnO3N) by bonding to three O atoms from three different naphthalene-1,4-dicarboxylate (1,4-ndc) ligands and one N atom from a 4,4′-bipyridine (bpy) ligand. The supramolecular secondary building unit (SBU) is a distorted paddle-wheel-like {Zn2(COO)2N2O2} unit and these units are linked by 1,4-ndc ligands within the layer to form a two-dimensional net parallel to the ab plane, which is further connected by bpy ligands to form the three-dimensional framework. The single net leaves voids that are filled by mutual interpenetration of an independent equivalent framework in a twofold interpenetrating architecture. The title compound is stable up to 673 K. Excitation and luminescence data observed at room temperature show that it emits bright-blue fluorescence.

scholarly journals New fluorochromes for thiols: maleimide and iodoacetamide derivatives of a 3-phenylcoumarin fluorophore.

1981 ◽  
Vol 29 (2) ◽  
pp. 314-316 ◽  
Author(s):  
T O Sippel
Keyword(s):  
Blue Fluorescence ◽  
Derivatives Of ◽  
Bright Blue Fluorescence ◽  
Bright Blue

N-(4-(7 - Diethylamino - methylcoumarin - 3 yl)phenyl)maleimide (CPM) and the corresponding iodoacetamide are described. When applied to sections at pH 6 and 9, respectively, the two fluorogens are very similar in their reactivity and selectivity toward thiols with which they form adducts having much the same bright blue fluorescence. However, difference in other properties favor CPM for further study.

scholarly journals The Function of the Heart-Body in Polychaetes

1958 ◽  
Vol 37 (1) ◽  
pp. 15-31 ◽  
Author(s):  
G. Y. Kennedy ◽  
R. Phillips Dales
Keyword(s):  
Body Wall ◽  
The Body ◽  
Large Concentration ◽  
Blue Fluorescence ◽  
Marine Animals ◽  
Bright Blue Fluorescence ◽  
Coproporphyrin I ◽  
Bright Blue

The heart-bodies and some other tissues of a number of polychaetes have been examined chemically, and the porphyrin pigments from these tissues described. Coproporphyrin III was shown to be present in relatively large concentration in all the heart-bodies, together with traces of coproporphyrin I, a tricarboxylic porphyrin and protohaematin. The body wall of light (pink) and dark (brown) coloured Arenicola and of Amphitrite also contained these pigments in varying amounts. Other non-porphyrin pigments were also seen in the body wall of some animals, the most remarkable being a colourless compound with a bright blue-fluorescence occurring in Flabelligera. Evidence is presented which supports the view that the heart-body is an haematopoietic organ, and the significance of this is discussed. Parallels are drawn between the occurrence of free porphyrins in marine animals and the occurrence of such pigments in porphyrias in man.

scholarly journals Enantioselective Construction of Six- and Seven-Membered Triorgano-Substituted Silicon-Stereogenic Heterocycles

2020 ◽  
Author(s):  
Chuan He ◽  
Shuyou Chen ◽  
Delong Mu ◽  
Pei-Lin Mai ◽  
Jie Ke
Keyword(s):  
Potential Application ◽  
Chemical Space ◽  
Optoelectronic Materials ◽  
Chiral Molecules ◽  
Blue Fluorescence ◽  
Wide Range ◽  
Organic Optoelectronic ◽  
Bright Blue Fluorescence ◽  
Bright Blue ◽  
Application Prospects

Abstract A rhodium-catalyzed enantioselective construction of six- and seven-membered triorgano-substituted silicon-stereogenic heterocycles is developed. This process undergoes a direct dehydrogenative C−H silylation, giving access to a wide range of novel triorgano-substituted silicon-stereogenic heterocycles in good to excellent yields and enantioselectivities, that significantly enlarged the chemical space of the silicon-centered chiral molecules. Further elaboration of the chiral monohydrosilane product delivered various corresponding tetraorgano-substituted silicon-stereogenic heterocycles without the loss of enantiopurity. These novel silicon-bridged heterocycles exhibit bright blue fluorescence, which would have potential application prospects in organic optoelectronic materials.

A single-step emulsion approach to prepare fluorescent nanoscale coordination polymers for bioimaging

RSC Advances ◽  
2014 ◽  
Vol 4 (28) ◽  
pp. 14803-14806 ◽  
Author(s):  
Zhiyong Sun ◽  
Yangxue Li ◽  
Xingang Guan ◽  
Tingting Sun ◽  
Li Chen ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Single Step ◽  
Blue Fluorescence ◽  
Microemulsion Method ◽  
Good Biocompatibility ◽  
Bright Blue Fluorescence ◽  
Bright Blue ◽  
Nanoscale Coordination Polymers

A facile and convenient microemulsion method is demonstrated to prepare fluorescent nanoscale coordination polymers. And the nanoscale coordination polymers exhibited bright blue fluorescence and good biocompatibility, thus giving them the ability for bioimaging.

scholarly journals Fluorogenic Membrane Overlays to Enumerate Total and FecalEscherichia coliand Total Vibrionaceae in Shellfish and Seawater

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Gary P. Richards ◽  
Michael A. Watson
Keyword(s):  
Cost Effective ◽  
Most Probable Number ◽  
Blue Fluorescence ◽  
Probable Number ◽  
Complex Samples ◽  
E Coli ◽  
Cellulose Membranes ◽  
Green Fluorescent ◽  
Bright Blue Fluorescence ◽  
Bright Blue

Three assays were developed to enumerate total and fecalEscherichia coliand total Vibrionaceae in shellfish, seawater, and other foods and environmental samples. Assays involve membrane overlays of overnight colonies on nonselective agar plates to detect -glucuronidase and lysyl aminopeptidase activities forE. coliand Vibrionaceae, respectively. Cellulose membranes containing the substrates 4-methylumbeferyl--D-glucuronide (MUG) produced a bright blue fluorescence when overlaid ontoE. coli, while L-lysyl-7-amino-4-trifluoromethylcoumarin produced green fluorescent foci when overlaid onto Vibrionaceae family members. A multiplex assay was also developed for simultaneously enumerating totalE. coliand total Vibrionaceae in oysters and seawater. Overall, 65% of overlaidE. coli(non-O157:H7) were MUG-positive, compared with 62% as determined by the most-probable-number-MUG assay. The overlays are rapid, simple, and cost effective for quantification purposes. This research provides practical alternatives for monitoring bacterial indicators and potential pathogens in complex samples, including molluscan shellfish.

Synthesis and characterization of bioreducible heparin-polyethyleneimine nanogels: application as imaging-guided photosensitizer delivery vehicle in photodynamic therapy

RSC Advances ◽  
2016 ◽  
Vol 6 (18) ◽  
pp. 14692-14704 ◽  
Author(s):  
Tilahun Ayane Debele ◽  
Shewaye Lakew Mekuria ◽  
Shuian-Yin Lin ◽  
Hsieh-Chih Tsai
Keyword(s):  
Drug Delivery ◽  
Photodynamic Therapy ◽  
Synthesis And Characterization ◽  
Delivery Vehicle ◽  
Blue Fluorescence ◽  
Image Guided ◽  
Image Guided Drug Delivery ◽  
Bright Blue Fluorescence ◽  
Bright Blue

HPC nanogels possess bright blue fluorescence which eliminates the use of additional probing agents in image-guided drug delivery. The results showed that disulfide crosslinked HPC nanogels are promising vehicles for stimulated photosensitizer delivery in advanced PDT.

Preparation and Characterization of SrAl2O4: Eu2+, Dy3+ Luminescent Nanofibers

2014 ◽  
Vol 496-500 ◽  
pp. 13-16 ◽  
Author(s):  
Jia Lin Liu ◽  
Kai Yan Zhang ◽  
Juo Luo ◽  
Yu Ping Chang
Keyword(s):  
Blue Shift ◽  
Blue Fluorescence ◽  
Electrospinning Technique ◽  
Reducing Atmosphere ◽  
Characteristic Emission ◽  
Ultraviolet Ray ◽  
Ion Characteristic ◽  
Bright Blue Fluorescence ◽  
Bright Blue

PVP/[Sr (NO3)2+Al (NO3)3+Eu (NO3)3+Dy (NO3)3] composite nanofibres were prepared by electrospinning technique. SrAl2O4:Eu2+, Dy3+ luminescent nanofibers were synthesized by calcination under a reducing atmosphere at 1100°C. The luminescent nanofibers were characterized by XRD, SEM, FTIR, TG, fluorescence spectrophotometer, respectively. The experimental results showed that the products are with monoclinic SrAl2O4 crystal structure, the diameter of nanofibers is about 100nm and the size is uniformly distributed. The luminescent nanofibers emit bright blue fluorescence of 470nm in wavelength of Eu2+ ion characteristic emission under the excitation of 365nm in wavelength of ultraviolet ray. The position of emission peak exhibit blue shift in some degree compared with that of bulk SrAl2O4:Eu2+, Dy3+.

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