ChemInform Abstract: The Synthesis and Characterization of Stable Radicals Containing the Thiazyl (SN) Fragment and Their Use as Building Blocks for Advanced Functional Materials

ChemInform ◽  
2011 ◽  
Vol 42 (50) ◽  
pp. no-no
Author(s):  
Robin G. Hicks
Keyword(s):  
Functional Materials ◽  
Building Blocks ◽  
Synthesis And Characterization ◽  
Stable Radicals

Conjugated oligomers incorporating azulene building blocks – seven- vs. five-membered ring connectivity

2014 ◽  
Vol 5 (11) ◽  
pp. 4483-4489 ◽  
Author(s):  
Elizabeth Amir ◽  
Masahito Murai ◽  
Roey J. Amir ◽  
John S. Cowart ◽  
Michael L. Chabinyc ◽  
...  
Keyword(s):  
Building Blocks ◽  
Membered Ring ◽  
Synthesis And Characterization ◽  
Conjugated Oligomers

The properties of isomeric azulene derivatives based on 7- versus 5-membered ring substitution were examined by the synthesis and characterization of well-defined electroactive oligomers.

scholarly journals Recent Progress in the Synthesis and Characterization of Diarylethene-based MOFs

2014 ◽  
Vol 70 (a1) ◽  
pp. C1223-C1223
Author(s):  
Jason Benedict ◽  
Ian Walton ◽  
Dan Patel ◽  
Jordan Cox
Keyword(s):  
Chemical Properties ◽  
Building Blocks ◽  
Synthesis And Characterization ◽  
Next Generation ◽  
Design Synthesis ◽  
Thermally Induced ◽  
Potential Applications ◽  
External Stimuli ◽  
Physical And Chemical

Metal-organic Frameworks (MOFs) remain an extremely active area of research given the wide variety of potential applications and the enormous diversity of structures that can be created from their constituent building blocks. While MOFs are typically employed as passive materials, next-generation materials will exhibit structural and/or electronic changes in response to applied external stimuli including light, charge, and pH. Herein we present recent results in which advanced photochromic diarylethenes are combined with MOFs through covalent and non-covalent methods to create photo-responsive permanently porous crystalline materials. This presentation will describe the design, synthesis, and characterization of next-generation photo-switchable diarylethene based ligands which are subsequently used to photo-responsive MOFs. These UBMOF crystals are, by design, isostructural with previously reported non-photoresponsive frameworks which enables a systematic comparison of their physical and chemical properties. While the photoswitching of the isolated ligand in solution is fully reversible, the cycloreversion reaction is suppressed in the UBMOF single crystalline phase. Spectroscopic evidence for thermally induced cycloreversion will be presented, as well as a detailed analysis addressing the limits of X-ray diffraction techniques applied to these systems.

scholarly journals Synthesis and characterization of poly(amino acid methacrylate)-stabilized diblock copolymer nano-objects

2015 ◽  
Vol 6 (10) ◽  
pp. 1805-1816 ◽  
Author(s):  
Vincent Ladmiral ◽  
Alexandre Charlot ◽  
Mona Semsarilar ◽  
Steven. P. Armes
Keyword(s):  
Amino Acid ◽  
Diblock Copolymer ◽  
Michael Addition ◽  
Self Assembly ◽  
Building Blocks ◽  
Synthesis And Characterization

Two amino acid methacrylates prepared via Michael addition are used as building blocks to prepare novel diblock copolymer nano-objects via polymerisation-induced self-assembly.

The synthesis and characterization of liquid crystalline oligoimides and polyimides

1995 ◽  
Vol 7 (4) ◽  
pp. 421-431 ◽  
Author(s):  
P Alder ◽  
J G Dolden ◽  
P Smith
Keyword(s):  
Liquid Crystalline ◽  
Solution Method ◽  
Molar Mass ◽  
Building Blocks ◽  
Decomposition Temperature ◽  
Synthesis And Characterization ◽  
Scanning Calorimetry ◽  
Nematic Phases ◽  
Optical Polarizing Microscopy

There are few examples of thermotropic polyimides reported in the literature. In the present article the authors report the synthesis and characterization of some novel oligoand poly-imides which exhibit mesogenic behaviour. The solution method of Yamazaki et al (Yamazaki N, Higashi F and Kawasaki J 1974 J. Polym. Sci., Polym. Chem. Ed. 12 2149) for the preparation of polyamides was successfully applied to the formation of imide compounds and oligomers. Liquid crystal phases were characterized by optical polarizing microscopy and by differential scanning calorimetry. Two anhydrides were employed which were considered to be suitable building blocks for preparing potentially mesogenic polyimides, namely biphenyl tetracarboxytic dianhydride and pyromellitic dianhydride. Low-molar-mass materials were first synthesized with monoanhydride units to endcap the chains. using nadic and maleic anhydrides. Nematic phases Awere observed in several nadic diimide compounds containing multicyclic cores and in some low-molar-mass diimides and polyimides which contained a biphenylene unit in conjunction with at least one other unsaturated ring When the nadlmldes were heated above 220 C cross-linking and decomposition occurred with loss of mesogenic properties. A fusible polyimide was synthesized containing a flexible chain which exhibited thermotropic behaviour below its decomposition temperature.

Linking Deltahedral Zintl Clusters with Conjugated Organic Building Blocks: Synthesis and Characterization of the Zintl Triad [R-Ge9-CHCHCHCH-Ge9-R]4−

2015 ◽  
Vol 127 (12) ◽  
pp. 3819-3824 ◽  
Author(s):  
Manuel M. Bentlohner ◽  
Wilhelm Klein ◽  
Zohreh H. Fard ◽  
Laura-Alice Jantke ◽  
Thomas F. Fässler
Keyword(s):  
Building Blocks ◽  
Synthesis And Characterization ◽  
Zintl Clusters

Synthesis and Characterization of [Mo3S4(NDABu)(HNDABu)2]3-and [Mo3S4(HNDAPr)3]2-Anions as Building Blocks for Organic-Inorganic Hybrid Solids

2012 ◽  
Vol 2013 (7) ◽  
pp. 1149-1156 ◽  
Author(s):  
Sylvain Duval ◽  
Frédéric Dumur ◽  
Laure Guénée ◽  
Jérôme Marrot ◽  
Corine Simonnet-Jégat ◽  
...  
Keyword(s):  
Building Blocks ◽  
Synthesis And Characterization ◽  
Inorganic Hybrid ◽  
Hybrid Solids

Synthesis and characterization of terthiophene bearing stable radicals

2021 ◽  
Vol 99 (1) ◽  
pp. 24-30
Author(s):  
M’hamed Chahma ◽  
Somaiah Almubayedh
Keyword(s):  
Platinum Electrode ◽  
Coupling Reaction ◽  
Stable Radical ◽  
Synthesis And Characterization ◽  
Oxidation Peak ◽  
Peak Potential ◽  
Cyclic Voltammetric ◽  
Cross Coupling Reaction ◽  
Stable Radicals

The synthesis and characterization of a new terthiophene bearing stable radical II is described. Through a cross coupling reaction between 2-tributylstannylthiophene and 6-(2,5-dibromo-thiophene-3-yl)pyridine-2-carboxaldehyde (2), 6-[2,2′:5′,2″]terthiophen-3′-ylpyridine-2-carboxaldehyde (3) was prepared. The condensation of 3 with 2, 4-diisopropylcarbonohydrazide bis-hydrochloride affords the heterocyclic tetrazane (4), which was oxidized with 1,4-benzoquinone to form the stable radical II. II characterized by IR, ESR, and cyclic voltammetry. Oxidative electropolymerization of II and its precursor 4 at oxidation peak potential of the terthiophene using cyclic voltammetric scans produces radical functionalized polyterthiophene on a platinum electrode (poly(II)-Pt).

Synthesis and Characterization of Polycaprolactone/Cellulose Acetate by Electrospinning for Wound Dressing Applications

2020 ◽  
Vol 981 ◽  
pp. 291-295
Author(s):  
Nurul Nadirah Suteris ◽  
Izan Izwan Misnon ◽  
Rasidi Roslan ◽  
Farah Hanani Zulkifli ◽  
Jayarama Reddy Venugopal ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
Wound Dressing ◽  
Functional Materials ◽  
Recent Time ◽  
Synthesis And Characterization ◽  
Environmental Load ◽  
High Quality ◽  
Electrospinning Technique ◽  
Renewable Material

Cellulose as a renewable material has received enormous interest in recent time with an effort to minimize the environmental load from mining earthborn functional materials as well as reducing carbon footprint. This work demonstrates that high quality cellulose could be produced from empty fruit bunch of oil palm plantation and could be developed into nanofibers. A small amount of poly (ε-caprolactone) (PCL) was added to the EFB driven cellulose acetate (CA) to develop them as nanofibers by electrospinning technique; this composition was further enhanced by adding curcumin, which is a natural anti-inflammatory, and compared their morphology, structure, mechanical and surface properties.

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