scholarly journals Catalyst-Free Polymerization with 100% Atom Economy: Facile Synthesis of Polysulfonates with Multifunctionalities

2020 ◽  
Author(s):  
XIAOLIN LIU ◽  
Xin Liang ◽  
YUBING HU ◽  
Qing Qu ◽  
Dongming Liu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Antibacterial Activity ◽  
Room Temperature ◽  
High Refractive Index ◽  
Atom Economy ◽  
Facile Synthesis ◽  
Spontaneous Polymerization ◽  
Catalyst Free ◽  
High Yields ◽  
Post Functionalization

Catalyst-free spontaneous polymerization for the synthesis of halogen-rich polysulfonates at room temperature in air with 100% atom economy in high yields was developed. The resulting polymers possess various properties, including post-functionalization, extraordinarily high refractive index, visible photodegradation, photoacid generation, multi-color and 3D fluorescent photopatterning, and practical broad-spectrum antibacterial activity.

scholarly journals Catalyst-Free Polymerization with 100% Atom Economy: Facile Synthesis of Polysulfonates with Multifunctionalities

2020 ◽  
Author(s):  
XIAOLIN LIU ◽  
Xin Liang ◽  
YUBING HU ◽  
Qing Qu ◽  
Dongming Liu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Antibacterial Activity ◽  
Room Temperature ◽  
High Refractive Index ◽  
Atom Economy ◽  
Facile Synthesis ◽  
Spontaneous Polymerization ◽  
Catalyst Free ◽  
High Yields ◽  
Post Functionalization

Catalyst-free spontaneous polymerization for the synthesis of halogen-rich polysulfonates at room temperature in air with 100% atom economy in high yields was developed. The resulting polymers possess various properties, including post-functionalization, extraordinarily high refractive index, visible photodegradation, photoacid generation, multi-color and 3D fluorescent photopatterning, and practical broad-spectrum antibacterial activity.

scholarly journals Catalyst-Free Spontaneous Polymerization with 100% Atom Economy: Facile Synthesis of Photoresponsive Polysulfonates with Multifunctionalities

JACS Au ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 344-353
Author(s):  
Xiaolin Liu ◽  
Xin Liang ◽  
Yubing Hu ◽  
Lei Han ◽  
Qing Qu ◽  
...  
Keyword(s):  
Atom Economy ◽  
Facile Synthesis ◽  
Spontaneous Polymerization ◽  
Catalyst Free

Novel One-pot Synthesis of Pyranocarbazole Derivatives via an Isocyanide-based Three-component Reaction

2020 ◽  
Vol 17 ◽  
Author(s):  
Visarapu Malathi ◽  
Pedavenkatagari Narayana Reddy ◽  
Pannala Padmaja
Keyword(s):  
Efficient Method ◽  
Atom Economy ◽  
Reaction Conditions ◽  
One Pot ◽  
Catalyst Free ◽  
One Pot Synthesis ◽  
Three Component Reaction ◽  
High Yields

Abstract:: An efficient method has been developed for the synthesis of new pyrano[3,2-c] and pyrano[3,2-a]carbazole de-rivatives via a three component reaction of 4-hydroxycarbazole or 2-hydroxycarbazole, isocyanides, and dialkylacetylenedi-carboxylates. Noteworthy features of this protocol include mild reaction conditions, catalyst-free, high atom-economy and high yields.

scholarly journals A Facile Synthesis of Polysubstituted Pyrroles by One-Pot Three-Component Reaction

2012 ◽  
Vol 9 (4) ◽  
pp. 2239-2244 ◽  
Author(s):  
Hossein Anaraki-Ardakani ◽  
Maziar Noei ◽  
Mina Karbalaei-Harofteh ◽  
Shahab Zomorodbakhsh
Keyword(s):  
Room Temperature ◽  
Facile Synthesis ◽  
One Pot ◽  
Pyrrole Derivatives ◽  
Dialkyl Acetylenedicarboxylates ◽  
One Pot Synthesis ◽  
Three Component Reaction ◽  
High Yields ◽  
Neutral Conditions

A new and efficient one-pot synthesis of polysubstituted pyrrole derivatives by three-component reaction between dialkyl acetylenedicarboxylates, triphenylphosphine, 2-aminopyridin derivatives in the presence of arylglyoxals is described. The reactions were performed in dichloromethane at room temperature and neutral conditions and afforded high yields of products.

scholarly journals Efficient synthesis of pyrazolopyridines containing a chromane backbone through domino reaction

2019 ◽  
Vol 15 ◽  
pp. 874-880
Author(s):  
Razieh Navari ◽  
Saeed Balalaie ◽  
Saber Mehrparvar ◽  
Fatemeh Darvish ◽  
Frank Rominger ◽  
...  
Keyword(s):  
Room Temperature ◽  
High Selectivity ◽  
Domino Reaction ◽  
Primary Amines ◽  
Efficient Synthesis ◽  
Atom Economy ◽  
Reaction Conditions ◽  
Efficient Approach ◽  
Three Component Reaction ◽  
High Yields

An efficient approach for the synthesis of pyrazolopyridines containing the aminochromane motif through a base-catalyzed cyclization reaction is reported. The synthesis was carried out through a three-component reaction of (arylhydrazono)methyl-4H-chromen-4-one, malononitrile, primary amines in the presence of Et3N at room temperature. However, carrying out the reaction under the same conditions without base led to a fused chromanyl-cyanopyridine. High selectivity, high atom economy, and good to high yields in addition to mild reaction conditions are the advantages of this approach.

Michael Addition of Aryl Thiols to 3-(2,2,2-Trifluoroethylidene)Oxindoles under Catalyst-Free Conditions: The Rapid Synthesis of Sulfur-Containing Oxindole Derivatives

2018 ◽  
Vol 42 (4) ◽  
pp. 210-214
Author(s):  
Bo Chen ◽  
Jiaheng Lei ◽  
Junling Zhao
Keyword(s):  
Michael Addition ◽  
Room Temperature ◽  
Rapid Synthesis ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Catalyst Free ◽  
Wide Range ◽  
High Yields ◽  
The Michael Addition ◽  
Sulfur Containing

A mild and efficient catalyst-free method for the rapid synthesis at room temperature of 3-thiomethylated oxindole derivatives has been achieved via the Michael addition of aryl thiols to ring and 1-substituted 3-(2,2,2-trifluoroethylidene)oxindoles in dichloromethane. The method was applicable to a wide range of thiols and variously substituted 3-(2,2,2-trifluoroethylidene)oxindoles under mild conditions as demonstrated by the synthesis in high yields with good diastereoselectivities of 30 3-thiomethylated oxindoles bearing a trifluoromethyl group.

scholarly journals Functionalization of N-arylmaleimides by sp3 C–H bonds of hydroacridines(qinolines)

2020 ◽  
pp. 165-170
Author(s):  
N.V. Smetanin ◽  
◽  
A.V. Mazepa ◽  
Keyword(s):  
1H Nmr ◽  
Spectral Methods ◽  
Good Yield ◽  
Single Step ◽  
Main Direction ◽  
Facile Synthesis ◽  
Nmr Spectrum ◽  
Type Reaction ◽  
Catalyst Free ◽  
High Yields

The catalyst-free sp3 C–H functionalization of tetrahydroacridine(quinolines) derivatives has been achieved using a Michael-type reaction with N-arylmaleimides. This method enables the facile synthesis of biologically important N-aryl bearing tetrahydroacridine(quinolines) moieties in a single step with high yields. The reaction occurs under non-catalytic conditions by heating of hydroacridines(quinolines) in DMSO within 4 h at 100–1200C. The reaction between starting compounds allows synthesizing (3S/4R)-3-[(3R/4S)-9-chloroacridine(quinoline)-4-yl]-1(-N-aryl)pyrrolidine-2,5-diones with a good yield. The structure of compounds was proved by spectral methods of analysis. The 1H NMR spectrum shows characteristic signals of protons of the CH-groups in acridine(quinoline) (3.4–3.5 ppm) and pyrrolidine (3.8–3.9 ppm) cycles. It is interesting to note that the main direction of the fragmentation is the Michael retro-reaction, which is accompanied by the elimination of 1-(2-nitrophenyl)-1H-pyrrole-2,5-dione and leads to the formation of m/z ions of starting chloroacridines(quinolines).

Room temperature phosphorescent organic materials for optical waveguides

2021 ◽  
Author(s):  
Mallesham Godumala ◽  
Avulu Vinod Kumar ◽  
Rajadurai Chandrasekar
Keyword(s):  
Refractive Index ◽  
Electromagnetic Fields ◽  
Optical Waveguides ◽  
Room Temperature ◽  
Organic Materials ◽  
High Refractive Index ◽  
Molecular Solids ◽  
Direction Parallel ◽  
One Dimensional

Organic optical waveguides (OWGs) are high refractive index one-dimensional molecular solids used to guide electromagnetic fields in a direction parallel to their long axis. OWGs attract a great deal of...

Transparent silphenylene elastomers from highly branched monomers

2021 ◽  
Author(s):  
Shuai Liang ◽  
Michael Yin Wong ◽  
Alyssa Schneider ◽  
Mengchen Liao ◽  
Gertrud Kräuter ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Catalyst Free

Catalyst free crosslinking of highly branched silphenylene monomers, made using the Piers–Rubinsztajn reaction, leads to high refractive index, soft elastomers.

scholarly journals Strong coupling of single quantum dots with low-refractive-index/high-refractive-index materials at room temperature

2020 ◽  
Vol 6 (47) ◽  
pp. eabb3095
Author(s):  
Xingsheng Xu ◽  
Siyue Jin
Keyword(s):  
Quantum Dots ◽  
Refractive Index ◽  
Strong Coupling ◽  
Room Temperature ◽  
High Refractive Index ◽  
Colloidal Quantum Dots ◽  
Rabi Splitting ◽  
Pl Spectra ◽  
Dielectric Cavity ◽  
Low Refractive Index

Strong coupling between a cavity and transition dipole moments in emitters leads to vacuum Rabi splitting. Researchers have not reported strong coupling between a single emitter and a dielectric cavity at room temperature until now. In this study, we investigated the photoluminescence (PL) spectra of colloidal quantum dots on the surface of a SiO2/Si material at various collection angles at room temperature. We measured the corresponding reflection spectra for the SiO2/Si material and compared them with the PL spectra. We observed PL spectral splitting and regarded it as strong coupling between colloidal quantum dots and the SiO2/Si material. Upper polaritons and lower polaritons exhibited anticrossing behavior. We observed Rabi splitting from single-photon emission in the dielectric cavity at room temperature. Through analysis, we attributed the Rabi splitting to strong coupling between quantum dots and bound states in the continuum in the low-refractive-index/high-refractive-index hybrid material.

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