当前位置：
X-MOL 学术
›
Chem. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Pressure-Induced Multistep Dehydrogenated Polymerization and Metallization of H2S–PH3–H2 Compound: Properties Measurement up to Megabar Pressures
Chemistry of Materials ( IF 7.2 ) Pub Date : 2024-01-05 , DOI: 10.1021/acs.chemmater.3c02797 Xiangdong Li 1 , Kangchi Zhang 1 , Wentao Liang 1 , Cheng Zhong 1 , Di Mai 1 , Azizur Rahman 1 , Xiaoyu Sun 1, 2 , Rucheng Dai 1, 2 , Zhongping Wang 1, 2 , Qiang Wu 3 , Zengming Zhang 1, 2
Chemistry of Materials ( IF 7.2 ) Pub Date : 2024-01-05 , DOI: 10.1021/acs.chemmater.3c02797 Xiangdong Li 1 , Kangchi Zhang 1 , Wentao Liang 1 , Cheng Zhong 1 , Di Mai 1 , Azizur Rahman 1 , Xiaoyu Sun 1, 2 , Rucheng Dai 1, 2 , Zhongping Wang 1, 2 , Qiang Wu 3 , Zengming Zhang 1, 2
Affiliation
|
Recently, hydrogen sulfide (H2S) and phosphine (PH3) have attracted great attention since the observation of superconducting transitions with high crucial temperatures under high pressure, which inspired subsequent investigations of the superconductivity of nonmetallic hydrides. Here, we report the successful photochemical and thermal syntheses of a series of novel H2S–PH3–H2 ternary hydrides with varying H2S and PH3 molar ratios. Raman, infrared, UV–visible absorption spectra, and electrical transport measurements are employed to investigate the chemical reaction and electronic structure transformation under high pressure. The pressure-induced polymerization of PH3 can be confirmed in H2S–PH3–H2 by Raman and infrared spectra, and the polymerization product, P4H6, can be recovered to ambient pressure; additionally, the polymerization pressure of PH3 is evidently hampered with increasing H2S concentration. Furthermore, it has been found that low temperatures can significantly inhibit the pressure-induced polymerization of PH3. The formation of Hittorf’s phosphorus is experimentally confirmed upon unloading pressure from 100 GPa to ambient pressure, which strongly implies the decomposition of P4H6 under high pressure. The H2S–PH3–H2 molecule gradually turns red and is eventually opaque following compression, which is consistent with the red shift of the UV–visible absorption spectra. Furthermore, synchrotron infrared absorption spectra and electrical transport examined above 65 GPa indicate the insulator-to-metal transition of H2S–PH3–H2 caused by dehydrogenated polymerization of P4H6 to Hittorf’s phosphorus.
中文翻译：
H2S–PH3–H2 化合物的压力诱导多步脱氢聚合和金属化：高达兆巴压力的性能测量
近年来，硫化氢（H 2 S）和磷化氢（PH 3）由于在高压下观察到高临界温度的超导转变而引起了人们的广泛关注，这激发了后续对非金属氢化物超导性的研究。在这里，我们报道了一系列具有不同H 2 S和PH 3摩尔比的新型H 2 S–PH 3 –H 2三元氢化物的成功光化学和热合成。采用拉曼、红外、紫外-可见吸收光谱和电传输测量来研究高压下的化学反应和电子结构转变。通过拉曼光谱和红外光谱可以证实H 2 S–PH 3 –H 2中PH 3的压力诱导聚合，并且聚合产物P 4 H 6可以恢复到环境压力；此外，随着H 2 S浓度的增加，PH 3的聚合压力明显受到阻碍。此外，已经发现低温可以显着抑制压力诱导的PH 3聚合。实验证实了在卸载压力从100 GPa 到环境压力时希托夫磷的形成，这强烈暗示了P 4 H 6在高压下的分解。H 2 S–PH 3 –H 2分子在压缩后逐渐变红并最终变得不透明，这与紫外可见吸收光谱的红移一致。此外，在65 GPa以上检查的同步加速器红外吸收光谱和电传输表明，由P 4 H 6脱氢聚合成希托夫磷引起的H 2 S–PH 3 –H 2的绝缘体到金属的转变。
更新日期：2024-01-05
中文翻译：
H2S–PH3–H2 化合物的压力诱导多步脱氢聚合和金属化：高达兆巴压力的性能测量
近年来，硫化氢（H 2 S）和磷化氢（PH 3）由于在高压下观察到高临界温度的超导转变而引起了人们的广泛关注，这激发了后续对非金属氢化物超导性的研究。在这里，我们报道了一系列具有不同H 2 S和PH 3摩尔比的新型H 2 S–PH 3 –H 2三元氢化物的成功光化学和热合成。采用拉曼、红外、紫外-可见吸收光谱和电传输测量来研究高压下的化学反应和电子结构转变。通过拉曼光谱和红外光谱可以证实H 2 S–PH 3 –H 2中PH 3的压力诱导聚合，并且聚合产物P 4 H 6可以恢复到环境压力；此外，随着H 2 S浓度的增加，PH 3的聚合压力明显受到阻碍。此外，已经发现低温可以显着抑制压力诱导的PH 3聚合。实验证实了在卸载压力从100 GPa 到环境压力时希托夫磷的形成，这强烈暗示了P 4 H 6在高压下的分解。H 2 S–PH 3 –H 2分子在压缩后逐渐变红并最终变得不透明，这与紫外可见吸收光谱的红移一致。此外，在65 GPa以上检查的同步加速器红外吸收光谱和电传输表明，由P 4 H 6脱氢聚合成希托夫磷引起的H 2 S–PH 3 –H 2的绝缘体到金属的转变。
京公网安备 11010802027423号