The Raman depolarization ratios of gaseous CO2 in the spectral range of 1240-1430 cm-I are determined with a sensitive photoacoustic Raman spectroscopy, and more accurate data compared to the literature results are pr...The Raman depolarization ratios of gaseous CO2 in the spectral range of 1240-1430 cm-I are determined with a sensitive photoacoustic Raman spectroscopy, and more accurate data compared to the literature results are presented. The precision of the obtained depolarization ratio is achieved by measuring and fitting the dependence of the PARS signal intensity on the cross angle between the polarizations of two incident laser beams.展开更多
Metallophilic interaction is a unique type of weak intermolecular interaction,where the electronic configuration of two metal atoms is closed shell.Despite its significance in multidisciplinary fields,the nature of me...Metallophilic interaction is a unique type of weak intermolecular interaction,where the electronic configuration of two metal atoms is closed shell.Despite its significance in multidisciplinary fields,the nature of metallophilic interaction is still not well understood.In this work,we investigated the electronic structures and bonding characteristic of bimetallic Au2@Cu6 nanocluster through density functional theory method,which was reported in experiments recently[Angew.Chem.Int.Ed.55,3611(2016)].In general thinking,interaction between two moieties of(CuSH)6 ring and(Au2PH3)2 in the Au2@Cu6 nanocluster can be viewed as a d^10-σ closed-shell interaction.However,chemical bonding analysis shows that there is a ten center-two electron(10c-2e)multicenter bonding between two moieties.Further comparative studies on other bimetallic nanocluster M2@Cu6(M=Ag,Cu,Zn,Cd,Hg)also revealed that multicenter bonding is the origin of electronic stability of the complexes besides the d10-σclosed-shell interaction.This will provide valuable insights into the understanding of closed-shell interactions.展开更多
Rhodamine 6G-doped step-index polymer optical fiber is fabricated. The characteristics of the amplification of rhodamine 6G-doped step-index polymer optical fiber amplifier have been studied. The high-gain optical amp...Rhodamine 6G-doped step-index polymer optical fiber is fabricated. The characteristics of the amplification of rhodamine 6G-doped step-index polymer optical fiber amplifier have been studied. The high-gain optical amplification with a tunable wavelength range from 585 to 613 nm is obtained in a step-index polymer optical fiber doped with rhodamine 6G at 10-ppm level, which can be used for broadband amplifiers and tunable lasers.展开更多
基金This work was supported by the National Natural Sci- ence Foundation of China （No.20903002, No.21273211, No.9112T042, and No.21373194） and the Anhui Provin- cial Natural Science Foundation （No.1408085MA18）, and the National Key Basic Research Special Founda- tion （No.2013CB834602 and No.2010CB923300）.
文摘The Raman depolarization ratios of gaseous CO2 in the spectral range of 1240-1430 cm-I are determined with a sensitive photoacoustic Raman spectroscopy, and more accurate data compared to the literature results are presented. The precision of the obtained depolarization ratio is achieved by measuring and fitting the dependence of the PARS signal intensity on the cross angle between the polarizations of two incident laser beams.
基金supported by the National Natural Science Foundation of China(No.21873001 and No.21873002)the Foundation of Distinguished Young Scientists of Anhui Province。
文摘Metallophilic interaction is a unique type of weak intermolecular interaction,where the electronic configuration of two metal atoms is closed shell.Despite its significance in multidisciplinary fields,the nature of metallophilic interaction is still not well understood.In this work,we investigated the electronic structures and bonding characteristic of bimetallic Au2@Cu6 nanocluster through density functional theory method,which was reported in experiments recently[Angew.Chem.Int.Ed.55,3611(2016)].In general thinking,interaction between two moieties of(CuSH)6 ring and(Au2PH3)2 in the Au2@Cu6 nanocluster can be viewed as a d^10-σ closed-shell interaction.However,chemical bonding analysis shows that there is a ten center-two electron(10c-2e)multicenter bonding between two moieties.Further comparative studies on other bimetallic nanocluster M2@Cu6(M=Ag,Cu,Zn,Cd,Hg)also revealed that multicenter bonding is the origin of electronic stability of the complexes besides the d10-σclosed-shell interaction.This will provide valuable insights into the understanding of closed-shell interactions.
基金This work was supported by the National Natural Science Foundation of China (No.90201013and90201016),the Fujian Natural Science Foundation of China (No.A0110012),and the Fyjian Educational Department Foundation of China (NoJA02169).
文摘Rhodamine 6G-doped step-index polymer optical fiber is fabricated. The characteristics of the amplification of rhodamine 6G-doped step-index polymer optical fiber amplifier have been studied. The high-gain optical amplification with a tunable wavelength range from 585 to 613 nm is obtained in a step-index polymer optical fiber doped with rhodamine 6G at 10-ppm level, which can be used for broadband amplifiers and tunable lasers.
