Effect of pressure on synthetic diamond crystals at high temperatures and pressures in Fe/Ni catalyst system

CrystEngComm ◽  
2021 ◽  
Author(s):  
Shuai Fang ◽  
Yongkui Wang ◽  
Liangchao Chen ◽  
Zhiyun Lu ◽  
Zhenghao Cai ◽  
...  

Pressure is a necessary condition for the growth of natural diamond. Studying the effect of pressure on the nitrogen content of diamond is important for exploring the growth mechanism of...


CrystEngComm ◽  
2020 ◽  
Vol 22 (22) ◽  
pp. 3854-3862 ◽  
Author(s):  
Shuai Fang ◽  
Hongan Ma ◽  
Zheng hao Cai ◽  
Chun xiao Wang ◽  
Chao Fang ◽  
...  

Fe3O4 is a common earth mineral, which often exists in the form of inclusions in natural diamond.



CrystEngComm ◽  
2021 ◽  
Author(s):  
Yongkui Wang ◽  
Zhiwen Wang ◽  
Zhiyun Lu ◽  
Zhenghao Cai ◽  
Shuai Fang ◽  
...  

Silicon carbide (SiC) is a substance found in natural diamond inclusions. Analyzing the influence of SiC doping on the properties of synthetic diamonds is vital to understanding the growth mechanism...



2018 ◽  
Vol 36 (2) ◽  
pp. 134-141
Author(s):  
Shi Tang ◽  
Jun Su ◽  
Taijin Lu ◽  
Yongwang Ma ◽  
Jie Ke ◽  
...  


2015 ◽  
Vol 25 (5) ◽  
pp. 1587-1598 ◽  
Author(s):  
Qiu-ping WEI ◽  
Li MA ◽  
Jun YE ◽  
Zhi-ming YU


Author(s):  
Douglass F. Taber

Benjamin List of the Max-Planck-Institut, Mülheim, devised (J. Am. Chem. Soc. 2010, 132, 10227) a catalyst system for the stereocontrolled epoxidation of a trisubstituted alkenyl aldehyde 1. Takashi Ooi of Nagoya University effected (Angew. Chem. Int. Ed. 2010, 49, 7562; see also Org. Lett. 2010, 12, 4070) enantioselective Henry addition to an alkynyl aldehyde 3. Madeleine M. Joullié of the University of Pennsylvania showed (Org. Lett. 2010, 12, 4244) that an amine 7 added selectively to an alkynyl aziridine 6. Yutaka Ukaji and Katsuhiko Inomata of Kanazawa University developed (Chem. Lett. 2010, 39, 1036) the enantioselective dipolar cycloaddition of 9 with 10. K. C. Nicolaou of Scripps/La Jolla observed (Angew. Chem. Int. Ed. 2010, 49, 5875; see also J. Org. Chem. 2010, 75, 8658) that the allylic alcohol from enantioselective reduction of 12 could be hydrogenated with high diastereocontrol. Masamichi Ogasawara and Tamotsu Takahashi of Hokkaido University added (Org. Lett. 2010, 12, 5736) the allene 14 to the acetal 15 with substantial stereocontrol. Helen C. Hailes of University College London investigated (Chem. Comm. 2010, 46, 7608) the enzyme-mediated addition of 18 to racemic 17. Dawei Ma of the Shanghai Institute of Organic Chemistry, in the course of a synthesis of oseltamivir (Tamiflu), accomplished (Angew. Chem. Int. Ed. 2010, 49, 4656) the enantioselective addition of 21 to 20. Shigeki Matsunaga of the University of Tokyo and Masakatsu Shibasaki of the Institute of Microbial Chemistry developed (Org. Lett. 2010, 12, 3246) a Ni catalyst for the enantioselective addition of 23 to 24. Juthanat Kaeobamrung and Jeffrey W. Bode of ETH-Zurich and Marisa C. Kozlowski of the University of Pennsylvania devised (Proc. Natl. Acad. Sci. 2010, 107, 20661) an organocatalyst for the enantioselective addition of 27 to 26. Yihua Zhang of China Pharmaceutical University and Professor Ma effected (Tetrahedron Lett. 2010, 51, 3827) the related addition of 27 to 29. There have been scattered reports on the stereochemical course of the coupling of cyclic secondary organometallics. In a detailed study, Paul Knochel of Ludwig-Maximilians- Universität München showed (Nat. Chem. 2020, 2, 125) that equatorial bond formation dominated, exemplified by the conversion of 31 to 33.



2020 ◽  
Vol 11 (20) ◽  
pp. 3475-3480
Author(s):  
Yu-Jia Zheng ◽  
Guan-Wen Yang ◽  
Bo Li ◽  
Guang-Peng Wu

A highly stereoregular polyphosphoester with a rigid cyclohexylene structure in the main chain was constructed via ring-opening polymerization (ROP) in the presence of an organic catalyst system.



2015 ◽  
Vol 6 (33) ◽  
pp. 6088-6095 ◽  
Author(s):  
Wenjie Zheng ◽  
Nan Yan ◽  
Yutian Zhu ◽  
Wenpeng Zhao ◽  
Chunyu Zhang ◽  
...  

Highly trans-1,4-stereoregular polybutadiene (TPB) was obtained by CCTP and novel amphiphilic copolymers (TPB-b-PCL/PLA) were successfully synthesized.



2019 ◽  
Vol 17 (7) ◽  
pp. 1722-1726 ◽  
Author(s):  
Qun Cao ◽  
William I. Nicholson ◽  
Andrew C. Jones ◽  
Duncan L. Browne

An operationally simple mechanochemical method for the Pd catalysed Buchwald–Hartwig amination of arylhalides with secondary amines has been developed using a Pd PEPPSI catalyst system.



2020 ◽  
Vol 11 (6) ◽  
pp. 1531-1537 ◽  
Author(s):  
Victoria Dimakos ◽  
Daniel Gorelik ◽  
Hsin Y. Su ◽  
Graham E. Garrett ◽  
Gregory Hughes ◽  
...  

The combined action of boronic acid, photoredox catalyst and hydrogen atom transfer mediator enables the transformation of furanosides to 2-keto-3-deoxyfuranosides, a synthetic analog of the process catalyzed by the ribonucleotide reductase enzymes.



1992 ◽  
Vol 06 (10) ◽  
pp. 599-604
Author(s):  
BI-CAI PAN ◽  
WEI-PING ZHANG ◽  
SHANG-DA XIA ◽  
RONG-CHUAN FANG

The binding energy and spectra of clusters related to the growth of synthetic diamond films were calculated by DV-X α method. Having analysed the binding energy and compared the calculated optical spectra with the experimental ones measured by us, we found it is probably that one of the mechanisms for the growth of synthetic diamond films is the formation and adsorption on the diamond (111) surface of the activated complex compound CH 4· H .



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