Facile synthesis and properties of dithieno[3,2-b:2′,3′-d]arsoles

2016 ◽  
Vol 45 (28) ◽  
pp. 11338-11345 ◽  
Author(s):  
Takuji Kato ◽  
Hiroaki Imoto ◽  
Susumu Tanaka ◽  
Makoto Ishidoshiro ◽  
Kensuke Naka
Keyword(s):  
Solid State ◽  
Main Chain ◽  
Facile Synthesis ◽  
Synthetic Routes ◽  
Chain Type

The dithienoarsole skeleton can be safely and easily constructed, by a method superior to conventional synthetic routes. The obtained dithienoarsoles, including a main-chain type polymer, show luminescence not only in solution but also in the solid state.

Synthesis of “Main – Chain” Type Polyimide Matrix with a Chemically Bound Azo Group

2010 ◽  
Vol 159 ◽  
pp. 141-144 ◽  
Author(s):  
Anton Georgiev ◽  
Velichka Strijkova ◽  
Dean Dimov ◽  
Erinche Spassova ◽  
Jacob Assa ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Solid State ◽  
Fourier Transform Infrared Spectroscopy ◽  
Main Chain ◽  
Thermal Analyses ◽  
Azo Group ◽  
Polyimide Matrix ◽  
Polyimide Layer ◽  
Chain Type

A method for obtaining thin vacuum deposited azopolyimide layers is established. On the basis of the thermogravimetric and differential thermal analyses, the chemical reaction in the solid state between the initial precursors - 4,4’-diaminoazobenzene and pyromellitic dianhydride is discussed. Also, the preparation parameters allowing for a condensation of films of desired composition are determined. Fourier Transform Infrared Spectroscopy analyses confirm that the azo group is chemically bound in a thin polyimide layer matrix. This is a solution to the task of preparing a “Main – Chain” type polyimide matrix with a chemically bound azo- group.

Facile synthesis of high electrical conductive CoP via solid-state synthetic routes for supercapacitors

2017 ◽  
Vol 26 (1) ◽  
pp. 49-55 ◽  
Author(s):  
Yumei Hu ◽  
Maocheng Liu ◽  
Qingqing Yang ◽  
Lingbin Kong ◽  
Long Kang
Keyword(s):  
Solid State ◽  
Facile Synthesis ◽  
Synthetic Routes

Main-Chain-Type 8-Quinolinol Polymers:  Synthesis, Optical Properties, and Complex Formation with Metals

2008 ◽  
Vol 41 (5) ◽  
pp. 1654-1662 ◽  
Author(s):  
Takayuki Iijima ◽  
Shin-ichi Kuroda ◽  
Takakazu Yamamoto
Keyword(s):  
Optical Properties ◽  
Complex Formation ◽  
Main Chain ◽  
Chain Type

Facile Synthesis of Main-Chain Degradable Block Copolymers for Performance Enhanced Dismantlable Adhesion

2012 ◽  
Vol 4 (4) ◽  
pp. 2057-2064 ◽  
Author(s):  
Eriko Sato ◽  
Takashi Hagihara ◽  
Akikazu Matsumoto
Keyword(s):  
Block Copolymers ◽  
Main Chain ◽  
Facile Synthesis

Crosslinked main-chain-type polybenzoxazine coatings for corrosion protection of mild steel

2017 ◽  
Vol 14 (4) ◽  
pp. 937-944 ◽  
Author(s):  
Xin Lu ◽  
Yan Liu ◽  
Wenfei Zhang ◽  
Xueying Zhang ◽  
Changlu Zhou ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Protection ◽  
Main Chain ◽  
Chain Type

Thermosetting Mechanism Study of Organosilicon Polymer Containing Carborane by Solid-State NMR Spectroscopy

1999 ◽  
Vol 576 ◽  
Author(s):  
H. Kimura ◽  
K. Okita ◽  
M. Ichitani ◽  
M. Yonezawa ◽  
T. Sugimoto
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Spectra ◽  
Main Chain ◽  
Addition Reaction ◽  
Side Chain ◽  
Mechanism Study ◽  
Nmr Method ◽  
Organosilicon Polymer ◽  
Thermal Stable

ABSTRACTThe thermosetting mechanism of an organosilicon polymer containing carborane has been studied utilizing the 13and 29Si solid-state NMR method. The polymer having C≡C bonds in the main chain and CH═CH2, Si-H bonds, and carborane in the bulky side chain, shows a very highly thermal stability in air by curing. From 13C and 29Si NMR spectra of the polymer, it was found that the intermolecular cross-linking reactions of the polymer was due to (1) the diene reaction between Ph-C≡C and C≡C and (2) the addition reaction between side chain terminal and Ph-C≡C and between CH═CH2 and Si–H, and a very highly thermal stable structure is formed.

Solid State Carbon-13 NMR Studies of Vulcanized Elastomers. II, Sulfur Vulcanization of Natural Rubber

1987 ◽  
Vol 60 (2) ◽  
pp. 252-277 ◽  
Author(s):  
A. M. Zaper ◽  
J. L. Koenig
Keyword(s):  
Solid State ◽  
Nmr Spectra ◽  
Molecular Motion ◽  
Main Chain ◽  
Repeat Unit ◽  
Crosslinking Agent ◽  
Nmr Studies ◽  
Structural Modifications ◽  
Chain Isomerization ◽  
Cyclic Sulfide

Abstract In summary, the solid-state C-13 NMR technique has proven to be a significant method for the detection of crosslinks and other structural modifications in sulfur-vulcanized NR systems. The use of sulfur as a crosslinking agent by itself generates a considerable amount of main-chain structural modifications. Cyclic sulfide structures and cis-to-trans chain isomerization are detected in addition to polysulfidic crosslinks which are found attached to different carbons of the NR repeat unit. The phenomenon of reversion has also been detected in this study. The nature of the spectral broadening in the NMR spectra of the highly cured vulcanizates has two origins. The broadening arises from lack of molecular motion in the system and from an increase in chemical shift dispersion due to the new structures formed with crosslinking.

scholarly journals Facile synthesis of hollow hierarchical Ni@C nanocomposites with well-dispersed high-loading Ni nanoparticles embedded in carbon for reduction of 4-nitrophenol

RSC Advances ◽  
2018 ◽  
Vol 8 (29) ◽  
pp. 15999-16003 ◽  
Author(s):  
Xiaodi Guo ◽  
Hongpeng Kan ◽  
Xinxin Liu ◽  
Hongshuai Geng ◽  
Lianying Wang
Keyword(s):  
Solid State ◽  
Nickel Hydroxide ◽  
Carbon Matrix ◽  
High Loading ◽  
Ni Nanoparticles ◽  
Facile Synthesis ◽  
Graphitized Carbon ◽  
Highly Dispersed

Hollow hierarchical Ni@C nanocomposites with highly dispersed Ni nanoparticles (NPs) embedded in well-graphitized carbon matrix have been synthesized by solid-state pyrolysis of simple, well-defined organic–inorganic layered nickel hydroxide.

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