Solid-state Alder-ene reaction of 1-hexene under high pressure

Xu, J.*; Lang, P.*; Liang, S.*; Zhang, J.*; Fei, Y.*; Wang, Y.*; Gao, D.*; Hattori, Takanori; Abe, Jun*; Dong, X.*; et al.

Journal of Physical Chemistry Letters (Internet), p.2445 - 2451, 2025/00

https://doi.org/10.1021/acs.jpclett.4c03696

The Alder-ene reaction is a chemical reaction between an alkene with an allylic hydrogen, and it provides an efficient method to construct the C-C bond. Traditionally, this reaction requires catalysts, high temperatures, or photocatalysis. In this study, we reported a high-pressure-induced solid-state Alder-ene reaction of 1-hexene at room temperature without a catalyst. 1-Hexene crystallizes at 4.3 GPa and polymerizes at 18 GPa, forming olefins. By exploring gas chromatography-mass spectrometry, we discovered that 1-hexene generates dimeric products through the Alder-ene reaction under high pressures. The in situ neutron diffraction shows that the reaction process did not obey the topochemical rule. A six-membered ring transition state including one C-H bond and two alkene bonds was evidenced by the theoretical calculation, whose energy obviously decreased when compressed to 20 GPa. Our work offers a novel and promising method to realize the Alder-ene reaction at room temperature without a catalyst, expanding the application of this important reaction.

Validation of the Be ground-state molecular structure using Be()He triple differential reaction cross-section measurements

Li, P. J.*; Beaumel, D.*; Lee, J.*; Assi, M.*; Chen, S.*; Franchoo, S.*; Gibelin, J.*; Hammache, F.*; Harada, T.*; Kanada-En'yo, Yoshiko*; et al.

Physical Review Letters, 131(21), p.212501_1 - 212501_7, 2023/11

https://doi.org/10.1103/PhysRevLett.131.212501

The cluster structure of the neutron-rich isotope Be has been probed via the () reaction. The triple differential cross-section was extracted and compared to distorted-wave impulse approximation reaction calculations performed in a microscopic framework using the Tohsaki-Horiuchi-Schuck-Rpke wave function and the wave function deduced from Antisymmetrized Molecular Dynamics calculations. The remarkable agreement between calculated and measured cross-sections in both shape and magnitude validates the description of the Be ground-state as a rather compact nuclear molecule.

Dominant Andreev reflection through nonlinear radio-frequency transport

Zhang, T.*; Tajima, Hiroyuki*; Sekino, Yuta*; Uchino, Shun; Liang, H.*

Communications Physics (Internet), 6, p.86_1 - 86_7, 2023/04

https://doi.org/10.1038/s42005-023-01199-9

We theoretically propose the laser-induced Andreev reflection between two-component Fermi superfluid and normal states via spatially-uniform Rabi couplings. By analyzing the tunneling current between the superfluid and normal states up to the fourth order in the Rabi couplings, we find that the Andreev current exhibits unconventional non-Ohmic transport at zero temperature. Remarkably, the Andreev current gives the only contribution in the synthetic junction system at zero detunings regardless of the ratio of the chemical potential bias to the superfluid gap, which is in sharp contrast to that in the conventional superconductor-normal metal junction. Our result may also pave a way for understanding the black hole information paradox through the Andreev reflection as a quantum-information mirror.

Ten years of warming increased plant-derived carbon accumulation in an East Asian monsoon forest

Zhang, J.*; Kuang, L.*; Mou, Z.*; Kondo, Toshiaki*; Koarashi, Jun; Atarashi-Andoh, Mariko; Li, Y.*; Tang, X.*; Wang, Y.-P.*; Peuelas, J.*; et al.

Plant and Soil, 481(1-2), p.349 - 365, 2022/12

https://doi.org/10.1007/s11104-022-05642-8

Kinetics study of the Al-water reaction promoted by an ultrasonically prepared Al(OH) suspension

Liang, G.-H.*; Gai, W.-Z.*; Deng, Z.-Y.*; Xu, P. G.; Cheng, Z.*

RSC Advances (Internet), 6(42), p.35305 - 35314, 2016/04

AA2016-0023.pdf:1.41MB

https://doi.org/10.1039/C6RA01627H

Sulfate complexation of element 104, Rf, in HSO/HNO mixed solution

Li, Z.*; Toyoshima, Atsushi; Asai, Masato; Tsukada, Kazuaki; Sato, Tetsuya; Sato, Nozomi; Kikuchi, Takahiro; Nagame, Yuichiro; Schdel, M.; Pershina, V.*; et al.

Radiochimica Acta, 100(3), p.157 - 164, 2012/03

https://doi.org/10.1524/ract.2012.1898

Theoretical predictions of beta decay half-lives of neutron-rich nuclei within HFB+QRPA approach

Minato, Futoshi; Zhongming, N.*; Liang, H.*

no journal, , 

no abstracts in English

On-line isothermal gas chromatographic behavior of group-5 elements as homologues of Db

Sato, Tetsuya; Tsukada, Kazuaki; Asai, Masato; Toyoshima, Atsushi; Kasamatsu, Yoshitaka*; Li, Z.; Sato, Nozomi; Kikuchi, Takahiro; Liang, X. H.*; Kaneya, Yusuke*; et al.

no journal, , 

To investigate chemical properties of the superheavy element dubnium (Db, Z = 105), we have so far developed an on-line isothermal gas chromatographic apparatus. In this work, the on-line experiments with group-5 elements, Nb and Ta, using short-lived isotopes Nb and Ta as the homologues of Db were carried out. We determined optimum conditions to produce volatile compounds of the elements. Under the obtained conditions, overall efficiencies of the volatile compounds were measured as a function of the isothermal temperature in chlorinating condition with mixture of nitrogen gas and the SOCl vapor containing 1% oxygen. Based on the isothermal gas chromatographic behavior of them, it was found that Ta compounds would be less volatile than Nb ones.