scholarly journals Benzothiadiazole oligoene fatty acids: fluorescent dyes with large Stokes shifts

2016 ◽  
Vol 12 ◽  
pp. 2739-2747 ◽  
Author(s):  
Lukas J Patalag ◽  
Daniel B Werz
Keyword(s):  
Fatty Acids ◽  
Chain Length ◽  
Fluorescent Dyes ◽  
Quantum Yields ◽  
Synthesis And Characterization ◽  
Absorption Properties ◽  
Fluorescence Quantum Yields ◽  
Degree Of Unsaturation ◽  
Stokes Shifts

Herein, we report on the synthesis and characterization of novel fluorescent fatty acids with large Stokes shifts. Three examples consisting of the same number of carbon atoms and thus of similar chain length are presented differing in their degree of unsaturation. As major fluorogenic contributor at the terminus benzo[c][1,2,5]thiadiazole was used. Respective syntheses based on Wittig reactions followed by iodine-mediated isomerization are presented. The absorption properties are modulated by the number of conjugated C=C double bonds of the oligoene chain ranging from one to three. Large Stokes shifts of about 4900–5700 cm−1 and fluorescence quantum yields of up to 0.44 were observed.

Two-Photon Absorption Properties of Multipolar Triarylamino/ Tosylamido 1,1,4,4-Tetracyanobutadienes

2021 ◽  
Author(s):  
Nicolas Ripoche ◽  
Marie Betou ◽  
Clotilde Philippe ◽  
Yann Trolez ◽  
Olivier Mongin ◽  
...  
Keyword(s):  
Photon Absorption ◽  
Synthesis And Characterization ◽  
Absorption Properties ◽  
Two Photon Absorption ◽  
Two Photon

The synthesis and characterization of four new tetracyanobutadiene (TCBD) derivatives (1, 3c and 4b-c) incorporating tosylamido and 4-triphenylamino moieties are reported. Along with those of five closely related or differently...

ChemInform Abstract: Derivatization of Keto Fatty Acids. Part 9. Synthesis and Characterization of Oxathiolanes.

ChemInform ◽  
1987 ◽  
Vol 18 (11) ◽  
Author(s):  
S. AHMAD ◽  
M. KHAN ◽  
F. AHMAD ◽  
NASIRULLA NASIRULLA ◽  
S. M. OSMAN
Keyword(s):  
Fatty Acids ◽  
Synthesis And Characterization

scholarly journals Effect of fatty acid chain length and saturation on the gastrointestinal handling and metabolic disposal of dietary fatty acids in women

1999 ◽  
Vol 81 (1) ◽  
pp. 37-44 ◽  
Author(s):  
Amanda E. Jones ◽  
Michael Stolinski ◽  
Ruth D. Smith ◽  
Jane L. Murphy ◽  
Stephen A. Wootton
Keyword(s):  
Fatty Acids ◽  
Oleic Acid ◽  
Stearic Acid ◽  
Palmitic Acid ◽  
Chain Length ◽  
Time Course ◽  
Absorbed Dose ◽  
Dietary Fatty Acids ◽  
Fatty Acid Chain ◽  
Degree Of Unsaturation

The gastrointestinal handling and metabolic disposal of [1-13C]palmitic acid, [1-13C]stearic acid and [1-13C]oleic acid administered within a lipid–casein–glucose–sucrose emulsion were examined in normal healthy women by determining both the amount and nature of the13C label in stool and label excreted on breath as13CO2. The greatest excretion of13C label in stool was in the stearic acid trial (9.2 % of administered dose) whilst comparatively little label was observed in stool in either the palmitic acid (1.2 % of administered dose) or oleic acid (1.9 % of administered dose) trials. In both the palmitic acid and oleic acid trials, all of the label in stool was identified as being present in the form in which it was administered (i.e. [13C]palmitic acid in the palmitic acid trial and [13C]oleic acid in the oleic acid trial). In contrast, only 87 % of the label in the stool in the stearic acid trial was identified as [13C]stearic acid, the remainder was identified as [13C]palmitic acid which may reflect chain shortening of [1-13C]stearic acid within the gastrointestinal tract. Small, but statistically significant, differences were observed in the time course of recovery of13C label on breath over the initial 9 h of the study period (oleic acid = palmitic acid > stearic acid). However, when calculated over the 24 h study period, the recovery of the label as13CO2was similar in all three trials (approximately 25 % of absorbed dose). These results support the view that chain length and degree of unsaturation may influence the gastrointestinal handling and immediate metabolic disposal of these fatty acids even when presented within an emulsion.

New peripherally substituted lutetium mono and bis phthalocyanines: Synthesis and comparative photophysical and photochemical properties

2019 ◽  
Vol 23 (11n12) ◽  
pp. 1542-1550
Author(s):  
Nagihan Kocaağa ◽  
Öznur Dülger Kutlu ◽  
Ali Erdoğmuş
Keyword(s):  
Mass Spectrometry ◽  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Photophysical Properties ◽  
Quantum Yields ◽  
Synthesis And Characterization ◽  
Type Ii ◽  
H Nmr ◽  
Photochemical Properties

In this study, the synthesis and characterization of mono-(phthalocyaninato) lutetium(III) (1-Cl and 1-F) [Lu[Formula: see text](AcO)(Pc)] (Pc [Formula: see text] phthalocyaninato, AcO [Formula: see text] acetate) and bis-(phthalocyaninato) lutetium(III) (2-Cl and 2-Br) [Lu[Formula: see text]Pc[Formula: see text]] bearing halogenated (F, Cl and Br) phenoxy–phenoxy groups are described and verified by IR, [Formula: see text]H-NMR, UV-vis and mass spectrometry. Photochemical and photophysical properties of 1-F, 1-Cl 2-Cl and 2-Br in DMSO are also presented. A comparison between photophysical and photochemical parameters of mono and bis derivatives showed that mono phthalocyanines are better photosensitizers than bis phthalocyanines. Photophysical and photochemical properties of phthalocyanines are very useful for photodynamic therapy applications. Singlet oxygen quantum yields [Formula: see text] give an indication of the potential of the complexes as photosensitizers in photodynamic therapy applications. The chloro, fluoro, bromo-phenoxy–phenoxy substituted mono-(phthalocyaninato) lutetium(III) complexes (1-Cl and 1-F) gave good singlet oxygen quantum yields (from 0.86 to 0.80) in DMSO. Thus, these complexes show potential as Type II photosensitizers for PDT of cancer.

Synthesis and characterization of novel 7-oxy-3-ethyl-6-hexyl-4-methylcoumarin substituted metallo phthalocyanines and investigation of their photophysical and photochemical properties

2019 ◽  
Vol 48 (34) ◽  
pp. 13046-13056 ◽  
Author(s):  
Mücahit Özdemir ◽  
Begümhan Karapınar ◽  
Bahattin Yalçın ◽  
Ümit Salan ◽  
Mahmut Durmuş ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Quantum Yields ◽  
Synthesis And Characterization ◽  
Photochemical Properties ◽  
Lipophilic Groups

Coumarin functionalized metallo phthalocyanines shows increased singlet oxygen quantum yields when included lipophilic groups.

Chlorination vs. fluorination: a study of halogenated benzo[c][1,2,5]thiadiazole-based organic semiconducting dots for near-infrared cellular imaging

2020 ◽  
Vol 44 (19) ◽  
pp. 7740-7748
Author(s):  
Daize Mo ◽  
Li Lin ◽  
Pengjie Chao ◽  
Hanjian Lai ◽  
Qingwen Zhang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Cellular Imaging ◽  
Quantum Yields ◽  
Fluorescence Quantum Yields ◽  
Stokes Shifts

The chlorinated dots based on chlorinated benzo[c][1,2,5]thiadiazole unit possess higher fluorescence quantum yields, larger Stokes shifts, and better photostability than the fluorinated dots.

Synthesis and characterization of tall oil fatty acids-based alkyd resins and alkyd–acrylate copolymers

2008 ◽  
Vol 63 (1) ◽  
pp. 92-99 ◽  
Author(s):  
Pirita Uschanov ◽  
Nina Heiskanen ◽  
Pekka Mononen ◽  
Sirkka Liisa Maunu ◽  
Salme Koskimies
Keyword(s):  
Fatty Acids ◽  
Synthesis And Characterization ◽  
Tall Oil ◽  
Alkyd Resins ◽  
Tall Oil Fatty Acids

Synthesis and Characterization of the Monomeric Platinum(II) Complexes with 2,2’-Bipyridine Back-Bone Ligand

2012 ◽  
Vol 554-556 ◽  
pp. 811-815
Author(s):  
Min Chul Chung ◽  
Woong Kyu Jo ◽  
Seak Hwan Son ◽  
Chee Hun Kwak ◽  
Ji Hoon Lee ◽  
...  
Keyword(s):  
Platinum Complexes ◽  
Quantum Yields ◽  
Synthesis And Characterization ◽  
Blue Region ◽  
Very High

The reaction of platinum(II) complexes of [Pt(bpy-R)Cl2] (R = H; 2,2’-bipyridine(bpy), R = 2(CH)3; 4,4’-dimethyl-2,2’-biypridine (DM-bpy), R = 4(CH3); 3,3’-5,5’-tertamethyl-2,2’-bipyridiyl (TM-bpy), (1-3) or [Pt(1,10-phen-R’)Cl2] (R’ = H; 1,10-phenanthroline(1,10-phen), R’= 4(CH3); 3,4,7,8-tetramethyl-1,10-phenanthroline(3,4,7,8-tetramethyl-1,10-phen) (4-5) with 1,4-bis(5'-2',2"-bipyridine)benzene(bpy-Ph-bpy) affords the following monomeric platinium(II) complexes: [Pt(bpy)(bpy-Ph-bpy)]2+(1), [Pt(DM-bpy)(bpy-Ph-bpy)](2), and [Pt(TM-bpy)(bpy-ph-bpy)]2+(3), [Pt(1,10-phenanthroline)(bpy-ph-bpy)]2+2+(4), [Pt(3,4,7,82+-tetramethyl-1,10-phen)(bpy-ph-bpy)]2+(5), respectively. These complexes were characterized by NMR, IR, UV/VIS and PL spectroscopy of the complexes were elucidated. The internal quantum yields of these platinum complexes are very high (0.13 ~ 0.99) and they emit light in the blue region (360 ~ 417 nm).

Synthesis and characterization of poly(3-hydroxyalkanoates) from Brassica carinata oil with high content of erucic acid and from very long chain fatty acids

2011 ◽  
Vol 48 (1) ◽  
pp. 137-145 ◽  
Author(s):  
Giuseppe Impallomeni ◽  
Alberto Ballistreri ◽  
Giovanni Marco Carnemolla ◽  
Salvatore P.P. Guglielmino ◽  
Marco Sebastiano Nicolò ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Erucic Acid ◽  
Brassica Carinata ◽  
Synthesis And Characterization ◽  
Long Chain Fatty Acids ◽  
Long Chain ◽  
Chain Fatty Acids
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