One-step hydrothermal synthesis of chiral carbon dots with high asymmetric catalytic activity for enantioselective direct aldol reaction

2021 ◽  
Author(s):  
Shuang Liu ◽  
Yu He ◽  
Yu Liu ◽  
Shuaibin Wang ◽  
Yajun Jian ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Citric Acid ◽  
Hydrothermal Synthesis ◽  
Carbon Dots ◽  
Hydrothermal Reaction ◽  
Aldol Reaction ◽  
Asymmetric Catalytic ◽  
Direct Aldol Reaction ◽  
Chiral Carbon ◽  
One Step

Chiral carbon dots is prepared by a simple and one-step hydrothermal reaction at 180 °C for 2 h using citric acid and D-proline as precursors, which show high asymmetric catalytic...

scholarly journals An efficient dynamic asymmetric catalytic system within a zinc-templated network

2019 ◽  
Vol 55 (55) ◽  
pp. 7970-7973 ◽  
Author(s):  
Anna Serra-Pont ◽  
Ignacio Alfonso ◽  
Jordi Solà ◽  
Ciril Jimeno
Keyword(s):  
Catalytic Activity ◽  
Complex Network ◽  
Catalytic System ◽  
Aldol Reaction ◽  
High Catalytic Activity ◽  
Asymmetric Catalytic ◽  
Direct Aldol Reaction

Enhanced cooperativity leading to high catalytic activity and stereoselectivity in the direct aldol reaction has been achieved through a complex network of simple species interacting reversibly.

scholarly journals One-step hydrothermal synthesis and optical properties of self-quenching-resistant carbon dots towards fluorescent ink and as nanosensors for Fe3+ detection

RSC Advances ◽  
2019 ◽  
Vol 9 (15) ◽  
pp. 8290-8299 ◽  
Author(s):  
Dandan Xu ◽  
Fang Lei ◽  
Haohong Chen ◽  
Luqiao Yin ◽  
Ying Shi ◽  
...  
Keyword(s):  
Optical Properties ◽  
Citric Acid ◽  
Hydrothermal Synthesis ◽  
Quantum Yield ◽  
Carbon Source ◽  
Nitrogen Source ◽  
Carbon Dots ◽  
Raw Materials ◽  
One Pot ◽  
One Step

Blue CDs with a quantum yield of 30.21% were successfully synthesized by a simple one-pot hydrothermal treatment using citric acid (carbon source) and polyvinyl pyrrolidone (nitrogen source) as the raw materials towards fluorescent ink and as nanosensors for Fe3+ detection.

Design of Novel Hydrogen-Bonding Donor Organocatalysts and Their Application to Asymmetric Direct Aldol Reaction

Synlett ◽  
2017 ◽  
Vol 28 (11) ◽  
pp. 1363-1367 ◽  
Author(s):  
Tsuyoshi Miura ◽  
Hiroshi Akutsu ◽  
Kosuke Nakashima ◽  
Hikaru Yanai ◽  
Akira Kotani ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Catalytic Activity ◽  
Aldol Reaction ◽  
Aromatic Aldehydes ◽  
Aldol Reactions ◽  
Catalytic Activities ◽  
Asymmetric Catalytic ◽  
Direct Aldol Reaction ◽  
Double Hydrogen

Asymmetric catalytic activities of various organocatalysts bearing double hydrogen-bonding donor units showing different pK a values were examined for direct aldol reactions of cyclohexanone with aromatic aldehydes. Organocatalyst with motif exhibiting the highest acidity resulted in the corresponding aldol products with the highest enantioselectivity. A good correlation has been observed between the asymmetric catalytic activity for direct aldol reactions and acidities of double hydrogen-bonding donating units.

One-step hydrothermal synthesis of chiral carbon dots and their effects on mung bean plant growth

Nanoscale ◽  
2018 ◽  
Vol 10 (26) ◽  
pp. 12734-12742 ◽  
Author(s):  
Mengling Zhang ◽  
Lulu Hu ◽  
Huibo Wang ◽  
Yuxiang Song ◽  
Yang Liu ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Plant Growth ◽  
Hydrothermal Method ◽  
Carbon Dots ◽  
Mung Bean ◽  
Bean Plant ◽  
Chiral Carbon ◽  
Bean Plants ◽  
One Step

Chiral carbon dots were obtained by using a one-step hydrothermal method and promote the growth of mung bean plants.

Chiral Carbon Dots-Enzyme Nanoreactors with Enhanced Catalytic Activity for Cancer Therapy

2021 ◽  
Author(s):  
Pengli Gao ◽  
Shuang Chen ◽  
Shi Liu ◽  
Hongxin Liu ◽  
Zhigang Xie ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Cancer Therapy ◽  
Carbon Dots ◽  
Chiral Carbon

Synthesis of 1,2-Diamine Bifunctional Catalysts for the Direct Aldol Reaction Through Probing the Remote Amide Hydrogen

2019 ◽  
Vol 6 (2) ◽  
pp. 171-176
Author(s):  
Rajasekhar Dodda ◽  
Sampak Samanta ◽  
Matthew Su ◽  
John Cong-Gui Zhao
Keyword(s):  
Hydrogen Bonding ◽  
Catalytic Activity ◽  
Aldol Reaction ◽  
Catalytic Efficiency ◽  
Aldol Reactions ◽  
Catalyst Loading ◽  
Bifunctional Catalysts ◽  
Amide Hydrogen ◽  
Highly Efficient ◽  
Direct Aldol Reaction

Background: While proline can catalyze the asymmetric direct aldol reactions, its catalytic activity and catalyst turnover are both low. To improve the catalytic efficiency, many prolinebased organocatalysts have been developed. In this regard, prolinamide-based bifunctional catalysts have been demonstrated by us and others to be highly efficient catalysts for the direct aldol reactions. Results: Using the β-acetamido- and β-tosylamidoprolinamide catalysts, the highly enantio- and diastereoselective direct aldol reactions between enolizable ketones and aldehydes were achieved (up to >99% ee, 98:2 dr). A low catalyst loading of only 2-5 mol % of the β-tosylamidoprolinamide catalyst was needed to obtain the desired aldol products in good to high yields and high stereoselectivities. Methods: By carefully adjusting the hydrogen bonding ability of the remote β-amide hydrogen of the 1,2-diamine-based prolinamide bifunctional catalysts, the catalytic activity and the asymmetric induction of these catalysts were significantly improved for the direct aldol reaction between aldehydes and enolizable ketones. Conclusion: Some highly efficient 1,2-diamine-based bifunctional prolinamide catalysts have been developed through probing the remote β-amide hydrogen for its hydrogen bonding capability. These catalysts are easy to synthesize and high enantioselectivities may be achieved at very low catalyst loadings.

One-step synthesis of chiral carbon quantum dots and their enantioselective recognition

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 59956-59960 ◽  
Author(s):  
Yalin Zhang ◽  
Lulu Hu ◽  
Yue Sun ◽  
Cheng Zhu ◽  
Rongsheng Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Citric Acid ◽  
Hydrothermal Treatment ◽  
Carbon Quantum Dots ◽  
Enantioselective Recognition ◽  
Chiral Carbon ◽  
One Step

Chiral carbon quantum dots (l-carbon quantum dots, l-CQDs; and d-carbon quantum dots, d-CQDs) were synthesized through the facile hydrothermal treatment of carbonated citric acid and l-cysteine (or d-cysteine).

Multifunctional water-soluble luminescent carbon dots for imaging and Hg2+ sensing

2014 ◽  
Vol 2 (40) ◽  
pp. 6995-6999 ◽  
Author(s):  
Yanling Zhai ◽  
Zhijun Zhu ◽  
Chengzhou Zhu ◽  
Jiangtao Ren ◽  
Erkang Wang ◽  
...  
Keyword(s):  
Citric Acid ◽  
Carbon Dots ◽  
Large Scale ◽  
Water Soluble ◽  
One Step ◽  
Ingenious Method

We propose an ingenious method for large-scale fabrication of water-soluble photoluminescent carbon dots (CDs) by a one-step microwave route in the presence of citric acid and ethylenediamine.

Green synthesis of multifunctional carbon dots from coriander leaves and their potential application as antioxidants, sensors and bioimaging agents

The Analyst ◽  
2015 ◽  
Vol 140 (12) ◽  
pp. 4260-4269 ◽  
Author(s):  
Abhay Sachdev ◽  
P. Gopinath
Keyword(s):  
Hydrothermal Synthesis ◽  
Green Synthesis ◽  
Carbon Dots ◽  
Potential Application ◽  
One Step ◽  
Coriander Leaves

A facile one-step hydrothermal synthesis of multifunctional carbon dots from coriander leaves for versatile applications is reported.

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